diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/README.md b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/README.md
new file mode 100644
index 0000000..13479f8
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/README.md
@@ -0,0 +1,10 @@
+## How to Build and Run a Voltha Go language Adapter
+
+This directory is a repo for all voltha adapters written in Go language.  At this time, the simulated_olt and 
+simulated_onu adapters are the only adapters using the Go language.  These adapters provide basic capabilities
+which will be used for high availability and capacity testing.
+
+### Building and running the Simulated OLT and ONU Adapters
+
+Please refer to the ```BUILD.md``` file under the voltha-go repo
+
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/adapter_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/adapter_proxy_if.go
new file mode 100644
index 0000000..26b1448
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/adapter_proxy_if.go
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package adapterif
+
+import (
+	"context"
+
+	"github.com/golang/protobuf/proto"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+)
+
+// AdapterProxy interface for AdapterProxy implementation.
+type AdapterProxy interface {
+	SendInterAdapterMessage(ctx context.Context,
+		msg proto.Message,
+		msgType ic.InterAdapterMessageType_Types,
+		fromAdapter string,
+		toAdapter string,
+		toDeviceID string,
+		proxyDeviceID string,
+		messageID string) error
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/core_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/core_proxy_if.go
new file mode 100644
index 0000000..26d021f
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/core_proxy_if.go
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package adapterif
+
+import (
+	"context"
+
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+// CoreProxy interface for voltha-go coreproxy.
+type CoreProxy interface {
+	UpdateCoreReference(deviceID string, coreReference string)
+	DeleteCoreReference(deviceID string)
+	// getCoreTopic(deviceID string) kafka.Topic
+	//GetAdapterTopic(args ...string) kafka.Topic
+	// getAdapterTopic(args ...string) kafka.Topic
+	RegisterAdapter(ctx context.Context, adapter *voltha.Adapter, deviceTypes *voltha.DeviceTypes) error
+	DeviceUpdate(ctx context.Context, device *voltha.Device) error
+	PortCreated(ctx context.Context, deviceID string, port *voltha.Port) error
+	PortsStateUpdate(ctx context.Context, deviceID string, operStatus voltha.OperStatus_OperStatus) error
+	DeleteAllPorts(ctx context.Context, deviceID string) error
+	DeviceStateUpdate(ctx context.Context, deviceID string,
+		connStatus voltha.ConnectStatus_ConnectStatus, operStatus voltha.OperStatus_OperStatus) error
+
+	ChildDeviceDetected(ctx context.Context, parentDeviceID string, parentPortNo int,
+		childDeviceType string, channelID int, vendorID string, serialNumber string, onuID int64) (*voltha.Device, error)
+
+	ChildDevicesLost(ctx context.Context, parentDeviceID string) error
+	ChildDevicesDetected(ctx context.Context, parentDeviceID string) error
+	GetDevice(ctx context.Context, parentDeviceID string, deviceID string) (*voltha.Device, error)
+	GetChildDevice(ctx context.Context, parentDeviceID string, kwargs map[string]interface{}) (*voltha.Device, error)
+	GetChildDevices(ctx context.Context, parentDeviceID string) (*voltha.Devices, error)
+	SendPacketIn(ctx context.Context, deviceID string, port uint32, pktPayload []byte) error
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/events_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/events_proxy_if.go
new file mode 100644
index 0000000..00a86a5
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/adapterif/events_proxy_if.go
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package adapterif
+
+import (
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+// EventProxy interface for eventproxy
+type EventProxy interface {
+	SendDeviceEvent(deviceEvent *voltha.DeviceEvent, category EventCategory,
+		subCategory EventSubCategory, raisedTs int64) error
+}
+
+const (
+	EventTypeVersion = "0.1"
+)
+
+type (
+	EventType        = voltha.EventType_EventType
+	EventCategory    = voltha.EventCategory_EventCategory
+	EventSubCategory = voltha.EventSubCategory_EventSubCategory
+)
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/adapter_proxy.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/adapter_proxy.go
new file mode 100644
index 0000000..fee70c8
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/adapter_proxy.go
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package common
+
+import (
+	"context"
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes"
+	"github.com/golang/protobuf/ptypes/any"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"time"
+)
+
+type AdapterProxy struct {
+	kafkaICProxy *kafka.InterContainerProxy
+	adapterTopic string
+	coreTopic    string
+}
+
+func NewAdapterProxy(kafkaProxy *kafka.InterContainerProxy, adapterTopic string, coreTopic string) *AdapterProxy {
+	var proxy AdapterProxy
+	proxy.kafkaICProxy = kafkaProxy
+	proxy.adapterTopic = adapterTopic
+	proxy.coreTopic = coreTopic
+	log.Debugw("TOPICS", log.Fields{"core": proxy.coreTopic, "adapter": proxy.adapterTopic})
+	return &proxy
+}
+
+func (ap *AdapterProxy) SendInterAdapterMessage(ctx context.Context,
+	msg proto.Message,
+	msgType ic.InterAdapterMessageType_Types,
+	fromAdapter string,
+	toAdapter string,
+	toDeviceId string,
+	proxyDeviceId string,
+	messageId string) error {
+	log.Debugw("sending-inter-adapter-message", log.Fields{"type": msgType, "from": fromAdapter,
+		"to": toAdapter, "toDevice": toDeviceId, "proxyDevice": proxyDeviceId})
+
+	//Marshal the message
+	var marshalledMsg *any.Any
+	var err error
+	if marshalledMsg, err = ptypes.MarshalAny(msg); err != nil {
+		log.Warnw("cannot-marshal-msg", log.Fields{"error": err})
+		return err
+	}
+
+	//Build the inter adapter message
+	header := &ic.InterAdapterHeader{
+		Type:          msgType,
+		FromTopic:     fromAdapter,
+		ToTopic:       toAdapter,
+		ToDeviceId:    toDeviceId,
+		ProxyDeviceId: proxyDeviceId,
+	}
+	if messageId != "" {
+		header.Id = messageId
+	} else {
+		header.Id = uuid.New().String()
+	}
+	header.Timestamp = time.Now().Unix()
+	iaMsg := &ic.InterAdapterMessage{
+		Header: header,
+		Body:   marshalledMsg,
+	}
+	args := make([]*kafka.KVArg, 1)
+	args[0] = &kafka.KVArg{
+		Key:   "msg",
+		Value: iaMsg,
+	}
+
+	// Set up the required rpc arguments
+	topic := kafka.Topic{Name: toAdapter}
+	replyToTopic := kafka.Topic{Name: fromAdapter}
+	rpc := "process_inter_adapter_message"
+
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &topic, &replyToTopic, true, proxyDeviceId, args...)
+	log.Debugw("inter-adapter-msg-response", log.Fields{"replyTopic": replyToTopic, "success": success})
+	return unPackResponse(rpc, "", success, result)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/core_proxy.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/core_proxy.go
new file mode 100644
index 0000000..30117ca
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/core_proxy.go
@@ -0,0 +1,536 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package common
+
+import (
+	"context"
+	"github.com/golang/protobuf/ptypes"
+	a "github.com/golang/protobuf/ptypes/any"
+	"github.com/opencord/voltha-lib-go/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"github.com/opencord/voltha-protos/go/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"sync"
+)
+
+type CoreProxy struct {
+	kafkaICProxy        *kafka.InterContainerProxy
+	adapterTopic        string
+	coreTopic           string
+	deviceIdCoreMap     map[string]string
+	lockDeviceIdCoreMap sync.RWMutex
+}
+
+func NewCoreProxy(kafkaProxy *kafka.InterContainerProxy, adapterTopic string, coreTopic string) *CoreProxy {
+	var proxy CoreProxy
+	proxy.kafkaICProxy = kafkaProxy
+	proxy.adapterTopic = adapterTopic
+	proxy.coreTopic = coreTopic
+	proxy.deviceIdCoreMap = make(map[string]string)
+	proxy.lockDeviceIdCoreMap = sync.RWMutex{}
+	log.Debugw("TOPICS", log.Fields{"core": proxy.coreTopic, "adapter": proxy.adapterTopic})
+
+	return &proxy
+}
+
+func unPackResponse(rpc string, deviceId string, success bool, response *a.Any) error {
+	if success {
+		return nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(response, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		log.Debugw("response", log.Fields{"rpc": rpc, "deviceId": deviceId, "success": success, "error": err})
+		// TODO:  Need to get the real error code
+		return status.Errorf(codes.Canceled, "%s", unpackResult.Reason)
+	}
+}
+
+// UpdateCoreReference adds or update a core reference (really the topic name) for a given device Id
+func (ap *CoreProxy) UpdateCoreReference(deviceId string, coreReference string) {
+	ap.lockDeviceIdCoreMap.Lock()
+	defer ap.lockDeviceIdCoreMap.Unlock()
+	ap.deviceIdCoreMap[deviceId] = coreReference
+}
+
+// DeleteCoreReference removes a core reference (really the topic name) for a given device Id
+func (ap *CoreProxy) DeleteCoreReference(deviceId string) {
+	ap.lockDeviceIdCoreMap.Lock()
+	defer ap.lockDeviceIdCoreMap.Unlock()
+	delete(ap.deviceIdCoreMap, deviceId)
+}
+
+func (ap *CoreProxy) getCoreTopic(deviceId string) kafka.Topic {
+	ap.lockDeviceIdCoreMap.Lock()
+	defer ap.lockDeviceIdCoreMap.Unlock()
+
+	if t, exist := ap.deviceIdCoreMap[deviceId]; exist {
+		return kafka.Topic{Name: t}
+	}
+
+	return kafka.Topic{Name: ap.coreTopic}
+}
+
+func (ap *CoreProxy) getAdapterTopic(args ...string) kafka.Topic {
+	return kafka.Topic{Name: ap.adapterTopic}
+}
+
+func (ap *CoreProxy) RegisterAdapter(ctx context.Context, adapter *voltha.Adapter, deviceTypes *voltha.DeviceTypes) error {
+	log.Debugw("registering-adapter", log.Fields{"coreTopic": ap.coreTopic, "adapterTopic": ap.adapterTopic})
+	rpc := "Register"
+	topic := kafka.Topic{Name: ap.coreTopic}
+	replyToTopic := ap.getAdapterTopic()
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "adapter",
+		Value: adapter,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "deviceTypes",
+		Value: deviceTypes,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &topic, &replyToTopic, true, "", args...)
+	log.Debugw("Register-Adapter-response", log.Fields{"replyTopic": replyToTopic, "success": success})
+	return unPackResponse(rpc, "", success, result)
+}
+
+func (ap *CoreProxy) DeviceUpdate(ctx context.Context, device *voltha.Device) error {
+	log.Debugw("DeviceUpdate", log.Fields{"deviceId": device.Id})
+	rpc := "DeviceUpdate"
+	toTopic := ap.getCoreTopic(device.Id)
+	args := make([]*kafka.KVArg, 1)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	// Use a device specific topic as we are the only adaptercore handling requests for this device
+	replyToTopic := ap.getAdapterTopic()
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, device.Id, args...)
+	log.Debugw("DeviceUpdate-response", log.Fields{"deviceId": device.Id, "success": success})
+	return unPackResponse(rpc, device.Id, success, result)
+}
+
+func (ap *CoreProxy) PortCreated(ctx context.Context, deviceId string, port *voltha.Port) error {
+	log.Debugw("PortCreated", log.Fields{"portNo": port.PortNo})
+	rpc := "PortCreated"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(deviceId)
+	args := make([]*kafka.KVArg, 2)
+	id := &voltha.ID{Id: deviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "port",
+		Value: port,
+	}
+
+	// Use a device specific topic as we are the only adaptercore handling requests for this device
+	replyToTopic := ap.getAdapterTopic()
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, deviceId, args...)
+	log.Debugw("PortCreated-response", log.Fields{"deviceId": deviceId, "success": success})
+	return unPackResponse(rpc, deviceId, success, result)
+}
+
+func (ap *CoreProxy) PortsStateUpdate(ctx context.Context, deviceId string, operStatus voltha.OperStatus_OperStatus) error {
+	log.Debugw("PortsStateUpdate", log.Fields{"deviceId": deviceId})
+	rpc := "PortsStateUpdate"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(deviceId)
+	args := make([]*kafka.KVArg, 2)
+	id := &voltha.ID{Id: deviceId}
+	oStatus := &ic.IntType{Val: int64(operStatus)}
+
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "oper_status",
+		Value: oStatus,
+	}
+
+	// Use a device specific topic as we are the only adaptercore handling requests for this device
+	replyToTopic := ap.getAdapterTopic()
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, deviceId, args...)
+	log.Debugw("PortsStateUpdate-response", log.Fields{"deviceId": deviceId, "success": success})
+	return unPackResponse(rpc, deviceId, success, result)
+}
+
+func (ap *CoreProxy) DeleteAllPorts(ctx context.Context, deviceId string) error {
+	log.Debugw("DeleteAllPorts", log.Fields{"deviceId": deviceId})
+	rpc := "DeleteAllPorts"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(deviceId)
+	args := make([]*kafka.KVArg, 2)
+	id := &voltha.ID{Id: deviceId}
+
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+
+	// Use a device specific topic as we are the only adaptercore handling requests for this device
+	replyToTopic := ap.getAdapterTopic()
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, deviceId, args...)
+	log.Debugw("DeleteAllPorts-response", log.Fields{"deviceId": deviceId, "success": success})
+	return unPackResponse(rpc, deviceId, success, result)
+}
+
+func (ap *CoreProxy) DeviceStateUpdate(ctx context.Context, deviceId string,
+	connStatus voltha.ConnectStatus_ConnectStatus, operStatus voltha.OperStatus_OperStatus) error {
+	log.Debugw("DeviceStateUpdate", log.Fields{"deviceId": deviceId})
+	rpc := "DeviceStateUpdate"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(deviceId)
+	args := make([]*kafka.KVArg, 3)
+	id := &voltha.ID{Id: deviceId}
+	oStatus := &ic.IntType{Val: int64(operStatus)}
+	cStatus := &ic.IntType{Val: int64(connStatus)}
+
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "oper_status",
+		Value: oStatus,
+	}
+	args[2] = &kafka.KVArg{
+		Key:   "connect_status",
+		Value: cStatus,
+	}
+	// Use a device specific topic as we are the only adaptercore handling requests for this device
+	replyToTopic := ap.getAdapterTopic()
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, deviceId, args...)
+	log.Debugw("DeviceStateUpdate-response", log.Fields{"deviceId": deviceId, "success": success})
+	return unPackResponse(rpc, deviceId, success, result)
+}
+
+func (ap *CoreProxy) ChildDeviceDetected(ctx context.Context, parentDeviceId string, parentPortNo int,
+	childDeviceType string, channelId int, vendorId string, serialNumber string, onuId int64) (*voltha.Device, error) {
+	log.Debugw("ChildDeviceDetected", log.Fields{"pDeviceId": parentDeviceId, "channelId": channelId})
+	rpc := "ChildDeviceDetected"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 7)
+	id := &voltha.ID{Id: parentDeviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "parent_device_id",
+		Value: id,
+	}
+	ppn := &ic.IntType{Val: int64(parentPortNo)}
+	args[1] = &kafka.KVArg{
+		Key:   "parent_port_no",
+		Value: ppn,
+	}
+	cdt := &ic.StrType{Val: childDeviceType}
+	args[2] = &kafka.KVArg{
+		Key:   "child_device_type",
+		Value: cdt,
+	}
+	channel := &ic.IntType{Val: int64(channelId)}
+	args[3] = &kafka.KVArg{
+		Key:   "channel_id",
+		Value: channel,
+	}
+	vId := &ic.StrType{Val: vendorId}
+	args[4] = &kafka.KVArg{
+		Key:   "vendor_id",
+		Value: vId,
+	}
+	sNo := &ic.StrType{Val: serialNumber}
+	args[5] = &kafka.KVArg{
+		Key:   "serial_number",
+		Value: sNo,
+	}
+	oId := &ic.IntType{Val: int64(onuId)}
+	args[6] = &kafka.KVArg{
+		Key:   "onu_id",
+		Value: oId,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("ChildDeviceDetected-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+
+	if success {
+		volthaDevice := &voltha.Device{}
+		if err := ptypes.UnmarshalAny(result, volthaDevice); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, status.Errorf(codes.InvalidArgument, "%s", err.Error())
+		}
+		return volthaDevice, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		log.Debugw("ChildDeviceDetected-return", log.Fields{"deviceid": parentDeviceId, "success": success, "error": err})
+		// TODO: Need to get the real error code
+		return nil, status.Errorf(codes.Internal, "%s", unpackResult.Reason)
+	}
+
+}
+
+func (ap *CoreProxy) ChildDevicesLost(ctx context.Context, parentDeviceId string) error {
+	log.Debugw("ChildDevicesLost", log.Fields{"pDeviceId": parentDeviceId})
+	rpc := "ChildDevicesLost"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 1)
+	id := &voltha.ID{Id: parentDeviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "parent_device_id",
+		Value: id,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("ChildDevicesLost-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+	return unPackResponse(rpc, parentDeviceId, success, result)
+}
+
+func (ap *CoreProxy) ChildDevicesDetected(ctx context.Context, parentDeviceId string) error {
+	log.Debugw("ChildDevicesDetected", log.Fields{"pDeviceId": parentDeviceId})
+	rpc := "ChildDevicesDetected"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 1)
+	id := &voltha.ID{Id: parentDeviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "parent_device_id",
+		Value: id,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("ChildDevicesDetected-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+	return unPackResponse(rpc, parentDeviceId, success, result)
+}
+
+func (ap *CoreProxy) GetDevice(ctx context.Context, parentDeviceId string, deviceId string) (*voltha.Device, error) {
+	log.Debugw("GetDevice", log.Fields{"deviceId": deviceId})
+	rpc := "GetDevice"
+
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 1)
+	id := &voltha.ID{Id: deviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("GetDevice-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+
+	if success {
+		volthaDevice := &voltha.Device{}
+		if err := ptypes.UnmarshalAny(result, volthaDevice); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, status.Errorf(codes.InvalidArgument, "%s", err.Error())
+		}
+		return volthaDevice, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		log.Debugw("GetDevice-return", log.Fields{"deviceid": parentDeviceId, "success": success, "error": err})
+		// TODO:  Need to get the real error code
+		return nil, status.Errorf(codes.Internal, "%s", unpackResult.Reason)
+	}
+}
+
+func (ap *CoreProxy) GetChildDevice(ctx context.Context, parentDeviceId string, kwargs map[string]interface{}) (*voltha.Device, error) {
+	log.Debugw("GetChildDevice", log.Fields{"parentDeviceId": parentDeviceId, "kwargs": kwargs})
+	rpc := "GetChildDevice"
+
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 4)
+	id := &voltha.ID{Id: parentDeviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+
+	var cnt uint8 = 0
+	for k, v := range kwargs {
+		cnt += 1
+		if k == "serial_number" {
+			val := &ic.StrType{Val: v.(string)}
+			args[cnt] = &kafka.KVArg{
+				Key:   k,
+				Value: val,
+			}
+		} else if k == "onu_id" {
+			val := &ic.IntType{Val: int64(v.(uint32))}
+			args[cnt] = &kafka.KVArg{
+				Key:   k,
+				Value: val,
+			}
+		} else if k == "parent_port_no" {
+			val := &ic.IntType{Val: int64(v.(uint32))}
+			args[cnt] = &kafka.KVArg{
+				Key:   k,
+				Value: val,
+			}
+		}
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("GetChildDevice-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+
+	if success {
+		volthaDevice := &voltha.Device{}
+		if err := ptypes.UnmarshalAny(result, volthaDevice); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, status.Errorf(codes.InvalidArgument, "%s", err.Error())
+		}
+		return volthaDevice, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		log.Debugw("GetChildDevice-return", log.Fields{"deviceid": parentDeviceId, "success": success, "error": err})
+		// TODO:  Need to get the real error code
+		return nil, status.Errorf(codes.Internal, "%s", unpackResult.Reason)
+	}
+}
+
+func (ap *CoreProxy) GetChildDevices(ctx context.Context, parentDeviceId string) (*voltha.Devices, error) {
+	log.Debugw("GetChildDevices", log.Fields{"parentDeviceId": parentDeviceId})
+	rpc := "GetChildDevices"
+
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 1)
+	id := &voltha.ID{Id: parentDeviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("GetChildDevices-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+
+	if success {
+		volthaDevices := &voltha.Devices{}
+		if err := ptypes.UnmarshalAny(result, volthaDevices); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, status.Errorf(codes.InvalidArgument, "%s", err.Error())
+		}
+		return volthaDevices, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		}
+		log.Debugw("GetChildDevices-return", log.Fields{"deviceid": parentDeviceId, "success": success, "error": err})
+		// TODO:  Need to get the real error code
+		return nil, status.Errorf(codes.Internal, "%s", unpackResult.Reason)
+	}
+}
+
+func (ap *CoreProxy) SendPacketIn(ctx context.Context, deviceId string, port uint32, pktPayload []byte) error {
+	log.Debugw("SendPacketIn", log.Fields{"deviceId": deviceId, "port": port, "pktPayload": pktPayload})
+	rpc := "PacketIn"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(deviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 3)
+	id := &voltha.ID{Id: deviceId}
+	args[0] = &kafka.KVArg{
+		Key:   "device_id",
+		Value: id,
+	}
+	portNo := &ic.IntType{Val: int64(port)}
+	args[1] = &kafka.KVArg{
+		Key:   "port",
+		Value: portNo,
+	}
+	pkt := &ic.Packet{Payload: pktPayload}
+	args[2] = &kafka.KVArg{
+		Key:   "packet",
+		Value: pkt,
+	}
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, deviceId, args...)
+	log.Debugw("SendPacketIn-response", log.Fields{"pDeviceId": deviceId, "success": success})
+	return unPackResponse(rpc, deviceId, success, result)
+}
+
+func (ap *CoreProxy) DevicePMConfigUpdate(ctx context.Context, pmConfigs *voltha.PmConfigs) error {
+	log.Debugw("DevicePMConfigUpdate", log.Fields{"pmConfigs": pmConfigs})
+	rpc := "DevicePMConfigUpdate"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(pmConfigs.Id)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := make([]*kafka.KVArg, 1)
+	args[0] = &kafka.KVArg{
+		Key:   "device_pm_config",
+		Value: pmConfigs,
+	}
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, pmConfigs.Id, args...)
+	log.Debugw("DevicePMConfigUpdate-response", log.Fields{"pDeviceId": pmConfigs.Id, "success": success})
+	return unPackResponse(rpc, pmConfigs.Id, success, result)
+}
+
+func (ap *CoreProxy) ReconcileChildDevices(ctx context.Context, parentDeviceId string) error {
+	log.Debugw("ReconcileChildDevices", log.Fields{"parentDeviceId": parentDeviceId})
+	rpc := "ReconcileChildDevices"
+	// Use a device specific topic to send the request.  The adapter handling the device creates a device
+	// specific topic
+	toTopic := ap.getCoreTopic(parentDeviceId)
+	replyToTopic := ap.getAdapterTopic()
+
+	args := []*kafka.KVArg{
+		{Key: "parent_device_id", Value: &voltha.ID{Id: parentDeviceId}},
+	}
+
+	success, result := ap.kafkaICProxy.InvokeRPC(nil, rpc, &toTopic, &replyToTopic, true, parentDeviceId, args...)
+	log.Debugw("ReconcileChildDevices-response", log.Fields{"pDeviceId": parentDeviceId, "success": success})
+	return unPackResponse(rpc, parentDeviceId, success, result)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/events_proxy.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/events_proxy.go
new file mode 100644
index 0000000..25b1be4
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/events_proxy.go
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package common
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/opencord/voltha-lib-go/pkg/adapters/adapterif"
+	"github.com/opencord/voltha-lib-go/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+type EventProxy struct {
+	kafkaClient kafka.Client
+	eventTopic  kafka.Topic
+}
+
+func NewEventProxy(opts ...EventProxyOption) *EventProxy {
+	var proxy EventProxy
+	for _, option := range opts {
+		option(&proxy)
+	}
+	return &proxy
+}
+
+type EventProxyOption func(*EventProxy)
+
+func MsgClient(client kafka.Client) EventProxyOption {
+	return func(args *EventProxy) {
+		args.kafkaClient = client
+	}
+}
+
+func MsgTopic(topic kafka.Topic) EventProxyOption {
+	return func(args *EventProxy) {
+		args.eventTopic = topic
+	}
+}
+
+func (ep *EventProxy) formatId(eventName string) string {
+	return fmt.Sprintf("Voltha.openolt.%s.%s", eventName, strconv.FormatInt(time.Now().UnixNano(), 10))
+}
+
+func (ep *EventProxy) getEventHeader(eventName string, category adapterif.EventCategory, subCategory adapterif.EventSubCategory, eventType adapterif.EventType, raisedTs int64) *voltha.EventHeader {
+	var header voltha.EventHeader
+	if strings.Contains(eventName, "_") {
+		eventName = strings.Join(strings.Split(eventName, "_")[:len(strings.Split(eventName, "_"))-2], "_")
+	} else {
+		eventName = "UNKNOWN_EVENT"
+	}
+	/* Populating event header */
+	header.Id = ep.formatId(eventName)
+	header.Category = category
+	header.SubCategory = subCategory
+	header.Type = eventType
+	header.TypeVersion = adapterif.EventTypeVersion
+	header.RaisedTs = float32(raisedTs)
+	header.ReportedTs = float32(time.Now().UnixNano())
+	return &header
+}
+
+/* Send out device events*/
+func (ep *EventProxy) SendDeviceEvent(deviceEvent *voltha.DeviceEvent, category adapterif.EventCategory, subCategory adapterif.EventSubCategory, raisedTs int64) error {
+	if deviceEvent == nil {
+		log.Error("Recieved empty device event")
+		return errors.New("Device event nil")
+	}
+	var event voltha.Event
+	var de voltha.Event_DeviceEvent
+	de.DeviceEvent = deviceEvent
+	event.Header = ep.getEventHeader(deviceEvent.DeviceEventName, category, subCategory, voltha.EventType_DEVICE_EVENT, raisedTs)
+	event.EventType = &de
+	if err := ep.sendEvent(&event); err != nil {
+		log.Errorw("Failed to send device event to KAFKA bus", log.Fields{"device-event": deviceEvent})
+		return err
+	}
+	log.Infow("Successfully sent device event KAFKA", log.Fields{"Id": event.Header.Id, "Category": event.Header.Category,
+		"SubCategory": event.Header.SubCategory, "Type": event.Header.Type, "TypeVersion": event.Header.TypeVersion,
+		"ReportedTs": event.Header.ReportedTs, "ResourceId": deviceEvent.ResourceId, "Context": deviceEvent.Context,
+		"DeviceEventName": deviceEvent.DeviceEventName})
+
+	return nil
+
+}
+
+/* TODO: Send out KPI events*/
+
+func (ep *EventProxy) sendEvent(event *voltha.Event) error {
+	if err := ep.kafkaClient.Send(event, &ep.eventTopic); err != nil {
+		return err
+	}
+	log.Debugw("Sent event to kafka", log.Fields{"event": event})
+
+	return nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/performance_metrics.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/performance_metrics.go
new file mode 100644
index 0000000..8f74439
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/performance_metrics.go
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package common
+
+import (
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+type PmMetrics struct {
+	deviceId          string
+	frequency         uint32
+	grouped           bool
+	frequencyOverride bool
+	metrics           map[string]*voltha.PmConfig
+}
+
+type PmMetricsOption func(*PmMetrics)
+
+func Frequency(frequency uint32) PmMetricsOption {
+	return func(args *PmMetrics) {
+		args.frequency = frequency
+	}
+}
+
+func Grouped(grouped bool) PmMetricsOption {
+	return func(args *PmMetrics) {
+		args.grouped = grouped
+	}
+}
+
+func FrequencyOverride(frequencyOverride bool) PmMetricsOption {
+	return func(args *PmMetrics) {
+		args.frequencyOverride = frequencyOverride
+	}
+}
+
+func Metrics(pmNames []string) PmMetricsOption {
+	return func(args *PmMetrics) {
+		args.metrics = make(map[string]*voltha.PmConfig)
+		for _, name := range pmNames {
+			args.metrics[name] = &voltha.PmConfig{
+				Name:    name,
+				Type:    voltha.PmConfig_COUNTER,
+				Enabled: true,
+			}
+		}
+	}
+}
+
+func NewPmMetrics(deviceId string, opts ...PmMetricsOption) *PmMetrics {
+	pm := &PmMetrics{deviceId: deviceId}
+	for _, option := range opts {
+		option(pm)
+	}
+	return pm
+}
+
+func (pm *PmMetrics) ToPmConfigs() *voltha.PmConfigs {
+	pmConfigs := &voltha.PmConfigs{
+		Id:           pm.deviceId,
+		DefaultFreq:  pm.frequency,
+		Grouped:      pm.grouped,
+		FreqOverride: pm.frequencyOverride,
+	}
+	for _, v := range pm.metrics {
+		pmConfigs.Metrics = append(pmConfigs.Metrics, &voltha.PmConfig{Name: v.Name, Type: v.Type, Enabled: v.Enabled})
+	}
+	return pmConfigs
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/request_handler.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/request_handler.go
new file mode 100644
index 0000000..27f9846
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/request_handler.go
@@ -0,0 +1,614 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package common
+
+import (
+	"errors"
+	"github.com/golang/protobuf/ptypes"
+	"github.com/golang/protobuf/ptypes/empty"
+	"github.com/opencord/voltha-lib-go/pkg/adapters"
+	"github.com/opencord/voltha-lib-go/pkg/adapters/adapterif"
+	"github.com/opencord/voltha-lib-go/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"github.com/opencord/voltha-protos/go/openflow_13"
+	"github.com/opencord/voltha-protos/go/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type RequestHandlerProxy struct {
+	TestMode       bool
+	coreInstanceId string
+	adapter        adapters.IAdapter
+	coreProxy      adapterif.CoreProxy
+}
+
+func NewRequestHandlerProxy(coreInstanceId string, iadapter adapters.IAdapter, cProxy adapterif.CoreProxy) *RequestHandlerProxy {
+	var proxy RequestHandlerProxy
+	proxy.coreInstanceId = coreInstanceId
+	proxy.adapter = iadapter
+	proxy.coreProxy = cProxy
+	return &proxy
+}
+
+func (rhp *RequestHandlerProxy) Adapter_descriptor() (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Device_types() (*voltha.DeviceTypes, error) {
+	return nil, nil
+}
+
+func (rhp *RequestHandlerProxy) Health() (*voltha.HealthStatus, error) {
+	return nil, nil
+}
+
+func (rhp *RequestHandlerProxy) Adopt_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+
+	log.Debugw("Adopt_device", log.Fields{"deviceId": device.Id})
+
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+
+	//Invoke the adopt device on the adapter
+	if err := rhp.adapter.Adopt_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Reconcile_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+
+	//Invoke the reconcile device API on the adapter
+	if err := rhp.adapter.Reconcile_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Abandon_device(args []*ic.Argument) (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Disable_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+	//Invoke the Disable_device API on the adapter
+	if err := rhp.adapter.Disable_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Reenable_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+	//Invoke the Reenable_device API on the adapter
+	if err := rhp.adapter.Reenable_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Reboot_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+	//Invoke the Reboot_device API on the adapter
+	if err := rhp.adapter.Reboot_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+
+}
+
+func (rhp *RequestHandlerProxy) Self_test_device(args []*ic.Argument) (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Delete_device(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	fromTopic := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.FromTopic:
+			if err := ptypes.UnmarshalAny(arg.Value, fromTopic); err != nil {
+				log.Warnw("cannot-unmarshal-from-topic", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	//Update the core reference for that device
+	rhp.coreProxy.UpdateCoreReference(device.Id, fromTopic.Val)
+	//Invoke the delete_device API on the adapter
+	if err := rhp.adapter.Delete_device(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Get_device_details(args []*ic.Argument) (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Update_flows_bulk(args []*ic.Argument) (*empty.Empty, error) {
+	log.Debug("Update_flows_bulk")
+	if len(args) < 5 {
+		log.Warn("Update_flows_bulk-invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	flows := &voltha.Flows{}
+	flowMetadata := &voltha.FlowMetadata{}
+	groups := &voltha.FlowGroups{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case "flows":
+			if err := ptypes.UnmarshalAny(arg.Value, flows); err != nil {
+				log.Warnw("cannot-unmarshal-flows", log.Fields{"error": err})
+				return nil, err
+			}
+		case "groups":
+			if err := ptypes.UnmarshalAny(arg.Value, groups); err != nil {
+				log.Warnw("cannot-unmarshal-groups", log.Fields{"error": err})
+				return nil, err
+			}
+		case "flow_metadata":
+			if err := ptypes.UnmarshalAny(arg.Value, flowMetadata); err != nil {
+				log.Warnw("cannot-unmarshal-metadata", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("Update_flows_bulk", log.Fields{"flows": flows, "groups": groups})
+	//Invoke the bulk flow update API of the adapter
+	if err := rhp.adapter.Update_flows_bulk(device, flows, groups, flowMetadata); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Update_flows_incrementally(args []*ic.Argument) (*empty.Empty, error) {
+	log.Debug("Update_flows_incrementally")
+	if len(args) < 5 {
+		log.Warn("Update_flows_incrementally-invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	flows := &openflow_13.FlowChanges{}
+	flowMetadata := &voltha.FlowMetadata{}
+	groups := &openflow_13.FlowGroupChanges{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case "flow_changes":
+			if err := ptypes.UnmarshalAny(arg.Value, flows); err != nil {
+				log.Warnw("cannot-unmarshal-flows", log.Fields{"error": err})
+				return nil, err
+			}
+		case "group_changes":
+			if err := ptypes.UnmarshalAny(arg.Value, groups); err != nil {
+				log.Warnw("cannot-unmarshal-groups", log.Fields{"error": err})
+				return nil, err
+			}
+		case "flow_metadata":
+			if err := ptypes.UnmarshalAny(arg.Value, flowMetadata); err != nil {
+				log.Warnw("cannot-unmarshal-metadata", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("Update_flows_incrementally", log.Fields{"flows": flows, "groups": groups})
+	//Invoke the incremental flow update API of the adapter
+	if err := rhp.adapter.Update_flows_incrementally(device, flows, groups, flowMetadata); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Update_pm_config(args []*ic.Argument) (*empty.Empty, error) {
+	log.Debug("Update_pm_config")
+	if len(args) < 2 {
+		log.Warn("Update_pm_config-invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	pmConfigs := &voltha.PmConfigs{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case "pm_configs":
+			if err := ptypes.UnmarshalAny(arg.Value, pmConfigs); err != nil {
+				log.Warnw("cannot-unmarshal-pm-configs", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("Update_pm_config", log.Fields{"deviceId": device.Id, "pmConfigs": pmConfigs})
+	//Invoke the pm config update API of the adapter
+	if err := rhp.adapter.Update_pm_config(device, pmConfigs); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Receive_packet_out(args []*ic.Argument) (*empty.Empty, error) {
+	log.Debugw("Receive_packet_out", log.Fields{"args": args})
+	if len(args) < 3 {
+		log.Warn("Receive_packet_out-invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	deviceId := &ic.StrType{}
+	egressPort := &ic.IntType{}
+	packet := &openflow_13.OfpPacketOut{}
+	transactionID := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "deviceId":
+			if err := ptypes.UnmarshalAny(arg.Value, deviceId); err != nil {
+				log.Warnw("cannot-unmarshal-deviceId", log.Fields{"error": err})
+				return nil, err
+			}
+		case "outPort":
+			if err := ptypes.UnmarshalAny(arg.Value, egressPort); err != nil {
+				log.Warnw("cannot-unmarshal-egressPort", log.Fields{"error": err})
+				return nil, err
+			}
+		case "packet":
+			if err := ptypes.UnmarshalAny(arg.Value, packet); err != nil {
+				log.Warnw("cannot-unmarshal-packet", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("Receive_packet_out", log.Fields{"deviceId": deviceId.Val, "outPort": egressPort, "packet": packet})
+	//Invoke the adopt device on the adapter
+	if err := rhp.adapter.Receive_packet_out(deviceId.Val, int(egressPort.Val), packet); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Suppress_alarm(args []*ic.Argument) (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Unsuppress_alarm(args []*ic.Argument) (*empty.Empty, error) {
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Get_ofp_device_info(args []*ic.Argument) (*ic.SwitchCapability, error) {
+	if len(args) < 2 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	transactionID := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+
+	log.Debugw("Get_ofp_device_info", log.Fields{"deviceId": device.Id})
+
+	var cap *ic.SwitchCapability
+	var err error
+	if cap, err = rhp.adapter.Get_ofp_device_info(device); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	log.Debugw("Get_ofp_device_info", log.Fields{"cap": cap})
+	return cap, nil
+}
+
+func (rhp *RequestHandlerProxy) Get_ofp_port_info(args []*ic.Argument) (*ic.PortCapability, error) {
+	if len(args) < 3 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	device := &voltha.Device{}
+	pNo := &ic.IntType{}
+	transactionID := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device":
+			if err := ptypes.UnmarshalAny(arg.Value, device); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case "port_no":
+			if err := ptypes.UnmarshalAny(arg.Value, pNo); err != nil {
+				log.Warnw("cannot-unmarshal-port-no", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("Get_ofp_port_info", log.Fields{"deviceId": device.Id, "portNo": pNo.Val})
+	var cap *ic.PortCapability
+	var err error
+	if cap, err = rhp.adapter.Get_ofp_port_info(device, pNo.Val); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+	return cap, nil
+}
+
+func (rhp *RequestHandlerProxy) Process_inter_adapter_message(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 2 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	iaMsg := &ic.InterAdapterMessage{}
+	transactionID := &ic.StrType{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "msg":
+			if err := ptypes.UnmarshalAny(arg.Value, iaMsg); err != nil {
+				log.Warnw("cannot-unmarshal-device", log.Fields{"error": err})
+				return nil, err
+			}
+		case kafka.TransactionKey:
+			if err := ptypes.UnmarshalAny(arg.Value, transactionID); err != nil {
+				log.Warnw("cannot-unmarshal-transaction-ID", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+
+	log.Debugw("Process_inter_adapter_message", log.Fields{"msgId": iaMsg.Header.Id})
+
+	//Invoke the inter adapter API on the handler
+	if err := rhp.adapter.Process_inter_adapter_message(iaMsg); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", err.Error())
+	}
+
+	return new(empty.Empty), nil
+}
+
+func (rhp *RequestHandlerProxy) Download_image(args []*ic.Argument) (*voltha.ImageDownload, error) {
+	return &voltha.ImageDownload{}, nil
+}
+
+func (rhp *RequestHandlerProxy) Get_image_download_status(args []*ic.Argument) (*voltha.ImageDownload, error) {
+	return &voltha.ImageDownload{}, nil
+}
+
+func (rhp *RequestHandlerProxy) Cancel_image_download(args []*ic.Argument) (*voltha.ImageDownload, error) {
+	return &voltha.ImageDownload{}, nil
+}
+
+func (rhp *RequestHandlerProxy) Activate_image_update(args []*ic.Argument) (*voltha.ImageDownload, error) {
+	return &voltha.ImageDownload{}, nil
+}
+
+func (rhp *RequestHandlerProxy) Revert_image_update(args []*ic.Argument) (*voltha.ImageDownload, error) {
+	return &voltha.ImageDownload{}, nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/utils.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/utils.go
new file mode 100644
index 0000000..d3c562a
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/common/utils.go
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package common
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+//GetRandomSerialNumber returns a serial number formatted as "HOST:PORT"
+func GetRandomSerialNumber() string {
+	rand.Seed(time.Now().UnixNano())
+	return fmt.Sprintf("%d.%d.%d.%d:%d",
+		rand.Intn(255),
+		rand.Intn(255),
+		rand.Intn(255),
+		rand.Intn(255),
+		rand.Intn(9000)+1000,
+	)
+}
+
+//GetRandomMacAddress returns a random mac address
+func GetRandomMacAddress() string {
+	rand.Seed(time.Now().UnixNano())
+	return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
+		rand.Intn(128),
+		rand.Intn(128),
+		rand.Intn(128),
+		rand.Intn(128),
+		rand.Intn(128),
+		rand.Intn(128),
+	)
+}
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+const (
+	letterIdxBits = 6                    // 6 bits to represent a letter index
+	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
+	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
+)
+
+var src = rand.NewSource(time.Now().UnixNano())
+
+func GetRandomString(n int) string {
+	b := make([]byte, n)
+	// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
+	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = src.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
+			b[i] = letterBytes[idx]
+			i--
+		}
+		cache >>= letterIdxBits
+		remain--
+	}
+	return string(b)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/iAdapter.go b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/iAdapter.go
new file mode 100644
index 0000000..82fa644
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/adapters/iAdapter.go
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package adapters
+
+import (
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"github.com/opencord/voltha-protos/go/openflow_13"
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+//IAdapter represents the set of APIs a voltha adapter has to support.
+type IAdapter interface {
+	Adapter_descriptor() error
+	Device_types() (*voltha.DeviceTypes, error)
+	Health() (*voltha.HealthStatus, error)
+	Adopt_device(device *voltha.Device) error
+	Reconcile_device(device *voltha.Device) error
+	Abandon_device(device *voltha.Device) error
+	Disable_device(device *voltha.Device) error
+	Reenable_device(device *voltha.Device) error
+	Reboot_device(device *voltha.Device) error
+	Self_test_device(device *voltha.Device) error
+	Delete_device(device *voltha.Device) error
+	Get_device_details(device *voltha.Device) error
+	Update_flows_bulk(device *voltha.Device, flows *voltha.Flows, groups *voltha.FlowGroups, flowMetadata *voltha.FlowMetadata) error
+	Update_flows_incrementally(device *voltha.Device, flows *openflow_13.FlowChanges, groups *openflow_13.FlowGroupChanges, flowMetadata *voltha.FlowMetadata) error
+	Update_pm_config(device *voltha.Device, pm_configs *voltha.PmConfigs) error
+	Receive_packet_out(deviceId string, egress_port_no int, msg *openflow_13.OfpPacketOut) error
+	Suppress_alarm(filter *voltha.AlarmFilter) error
+	Unsuppress_alarm(filter *voltha.AlarmFilter) error
+	Get_ofp_device_info(device *voltha.Device) (*ic.SwitchCapability, error)
+	Get_ofp_port_info(device *voltha.Device, port_no int64) (*ic.PortCapability, error)
+	Process_inter_adapter_message(msg *ic.InterAdapterMessage) error
+	Download_image(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Get_image_download_status(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Cancel_image_download(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Activate_image_update(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+	Revert_image_update(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/client.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/client.go
new file mode 100644
index 0000000..f40d10e
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/client.go
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kvstore
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+)
+
+const (
+	// Default timeout in seconds when making a kvstore request
+	defaultKVGetTimeout = 5
+	// Maximum channel buffer between publisher/subscriber goroutines
+	maxClientChannelBufferSize = 10
+)
+
+// These constants represent the event types returned by the KV client
+const (
+	PUT = iota
+	DELETE
+	CONNECTIONDOWN
+	UNKNOWN
+)
+
+// KVPair is a common wrapper for key-value pairs returned from the KV store
+type KVPair struct {
+	Key     string
+	Value   interface{}
+	Version int64
+	Session string
+	Lease   int64
+}
+
+func init() {
+	log.AddPackage(log.JSON, log.WarnLevel, nil)
+}
+
+// NewKVPair creates a new KVPair object
+func NewKVPair(key string, value interface{}, session string, lease int64, version int64) *KVPair {
+	kv := new(KVPair)
+	kv.Key = key
+	kv.Value = value
+	kv.Session = session
+	kv.Lease = lease
+	kv.Version = version
+	return kv
+}
+
+// Event is generated by the KV client when a key change is detected
+type Event struct {
+	EventType int
+	Key       interface{}
+	Value     interface{}
+	Version   int64
+}
+
+// NewEvent creates a new Event object
+func NewEvent(eventType int, key interface{}, value interface{}, version int64) *Event {
+	evnt := new(Event)
+	evnt.EventType = eventType
+	evnt.Key = key
+	evnt.Value = value
+	evnt.Version = version
+
+	return evnt
+}
+
+// Client represents the set of APIs a KV Client must implement
+type Client interface {
+	List(key string, timeout int, lock ...bool) (map[string]*KVPair, error)
+	Get(key string, timeout int, lock ...bool) (*KVPair, error)
+	Put(key string, value interface{}, timeout int, lock ...bool) error
+	Delete(key string, timeout int, lock ...bool) error
+	Reserve(key string, value interface{}, ttl int64) (interface{}, error)
+	ReleaseReservation(key string) error
+	ReleaseAllReservations() error
+	RenewReservation(key string) error
+	Watch(key string) chan *Event
+	AcquireLock(lockName string, timeout int) error
+	ReleaseLock(lockName string) error
+	IsConnectionUp(timeout int) bool // timeout in second
+	CloseWatch(key string, ch chan *Event)
+	Close()
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/consulclient.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/consulclient.go
new file mode 100644
index 0000000..c3e3999
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/consulclient.go
@@ -0,0 +1,513 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kvstore
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	log "github.com/opencord/voltha-lib-go/pkg/log"
+	"sync"
+	"time"
+	//log "ciena.com/coordinator/common"
+	consulapi "github.com/hashicorp/consul/api"
+)
+
+type channelContextMap struct {
+	ctx     context.Context
+	channel chan *Event
+	cancel  context.CancelFunc
+}
+
+// ConsulClient represents the consul KV store client
+type ConsulClient struct {
+	session                *consulapi.Session
+	sessionID              string
+	consul                 *consulapi.Client
+	doneCh                 *chan int
+	keyReservations        map[string]interface{}
+	watchedChannelsContext map[string][]*channelContextMap
+	writeLock              sync.Mutex
+}
+
+// NewConsulClient returns a new client for the Consul KV store
+func NewConsulClient(addr string, timeout int) (*ConsulClient, error) {
+
+	duration := GetDuration(timeout)
+
+	config := consulapi.DefaultConfig()
+	config.Address = addr
+	config.WaitTime = duration
+	consul, err := consulapi.NewClient(config)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+
+	doneCh := make(chan int, 1)
+	wChannelsContext := make(map[string][]*channelContextMap)
+	reservations := make(map[string]interface{})
+	return &ConsulClient{consul: consul, doneCh: &doneCh, watchedChannelsContext: wChannelsContext, keyReservations: reservations}, nil
+}
+
+// IsConnectionUp returns whether the connection to the Consul KV store is up
+func (c *ConsulClient) IsConnectionUp(timeout int) bool {
+	log.Error("Unimplemented function")
+	return false
+}
+
+// List returns an array of key-value pairs with key as a prefix.  Timeout defines how long the function will
+// wait for a response
+func (c *ConsulClient) List(key string, timeout int, lock ...bool) (map[string]*KVPair, error) {
+	duration := GetDuration(timeout)
+
+	kv := c.consul.KV()
+	var queryOptions consulapi.QueryOptions
+	queryOptions.WaitTime = duration
+	// For now we ignore meta data
+	kvps, _, err := kv.List(key, &queryOptions)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	m := make(map[string]*KVPair)
+	for _, kvp := range kvps {
+		m[string(kvp.Key)] = NewKVPair(string(kvp.Key), kvp.Value, string(kvp.Session), 0, -1)
+	}
+	return m, nil
+}
+
+// Get returns a key-value pair for a given key. Timeout defines how long the function will
+// wait for a response
+func (c *ConsulClient) Get(key string, timeout int, lock ...bool) (*KVPair, error) {
+
+	duration := GetDuration(timeout)
+
+	kv := c.consul.KV()
+	var queryOptions consulapi.QueryOptions
+	queryOptions.WaitTime = duration
+	// For now we ignore meta data
+	kvp, _, err := kv.Get(key, &queryOptions)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	if kvp != nil {
+		return NewKVPair(string(kvp.Key), kvp.Value, string(kvp.Session), 0, -1), nil
+	}
+
+	return nil, nil
+}
+
+// Put writes a key-value pair to the KV store.  Value can only be a string or []byte since the consul API
+// accepts only a []byte as a value for a put operation. Timeout defines how long the function will
+// wait for a response
+func (c *ConsulClient) Put(key string, value interface{}, timeout int, lock ...bool) error {
+
+	// Validate that we can create a byte array from the value as consul API expects a byte array
+	var val []byte
+	var er error
+	if val, er = ToByte(value); er != nil {
+		log.Error(er)
+		return er
+	}
+
+	// Create a key value pair
+	kvp := consulapi.KVPair{Key: key, Value: val}
+	kv := c.consul.KV()
+	var writeOptions consulapi.WriteOptions
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	_, err := kv.Put(&kvp, &writeOptions)
+	if err != nil {
+		log.Error(err)
+		return err
+	}
+	return nil
+}
+
+// Delete removes a key from the KV store. Timeout defines how long the function will
+// wait for a response
+func (c *ConsulClient) Delete(key string, timeout int, lock ...bool) error {
+	kv := c.consul.KV()
+	var writeOptions consulapi.WriteOptions
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	_, err := kv.Delete(key, &writeOptions)
+	if err != nil {
+		log.Error(err)
+		return err
+	}
+	return nil
+}
+
+func (c *ConsulClient) deleteSession() {
+	if c.sessionID != "" {
+		log.Debug("cleaning-up-session")
+		session := c.consul.Session()
+		_, err := session.Destroy(c.sessionID, nil)
+		if err != nil {
+			log.Errorw("error-cleaning-session", log.Fields{"session": c.sessionID, "error": err})
+		}
+	}
+	c.sessionID = ""
+	c.session = nil
+}
+
+func (c *ConsulClient) createSession(ttl int64, retries int) (*consulapi.Session, string, error) {
+	session := c.consul.Session()
+	entry := &consulapi.SessionEntry{
+		Behavior: consulapi.SessionBehaviorDelete,
+		TTL:      "10s", // strconv.FormatInt(ttl, 10) + "s", // disable ttl
+	}
+
+	for {
+		id, meta, err := session.Create(entry, nil)
+		if err != nil {
+			log.Errorw("create-session-error", log.Fields{"error": err})
+			if retries == 0 {
+				return nil, "", err
+			}
+		} else if meta.RequestTime == 0 {
+			log.Errorw("create-session-bad-meta-data", log.Fields{"meta-data": meta})
+			if retries == 0 {
+				return nil, "", errors.New("bad-meta-data")
+			}
+		} else if id == "" {
+			log.Error("create-session-nil-id")
+			if retries == 0 {
+				return nil, "", errors.New("ID-nil")
+			}
+		} else {
+			return session, id, nil
+		}
+		// If retry param is -1 we will retry indefinitely
+		if retries > 0 {
+			retries--
+		}
+		log.Debug("retrying-session-create-after-a-second-delay")
+		time.Sleep(time.Duration(1) * time.Second)
+	}
+}
+
+// Helper function to verify mostly whether the content of two interface types are the same.  Focus is []byte and
+// string types
+func isEqual(val1 interface{}, val2 interface{}) bool {
+	b1, err := ToByte(val1)
+	b2, er := ToByte(val2)
+	if err == nil && er == nil {
+		return bytes.Equal(b1, b2)
+	}
+	return val1 == val2
+}
+
+// Reserve is invoked to acquire a key and set it to a given value. Value can only be a string or []byte since
+// the consul API accepts only a []byte.  Timeout defines how long the function will wait for a response.  TTL
+// defines how long that reservation is valid.  When TTL expires the key is unreserved by the KV store itself.
+// If the key is acquired then the value returned will be the value passed in.  If the key is already acquired
+// then the value assigned to that key will be returned.
+func (c *ConsulClient) Reserve(key string, value interface{}, ttl int64) (interface{}, error) {
+
+	// Validate that we can create a byte array from the value as consul API expects a byte array
+	var val []byte
+	var er error
+	if val, er = ToByte(value); er != nil {
+		log.Error(er)
+		return nil, er
+	}
+
+	// Cleanup any existing session and recreate new ones.  A key is reserved against a session
+	if c.sessionID != "" {
+		c.deleteSession()
+	}
+
+	// Clear session if reservation is not successful
+	reservationSuccessful := false
+	defer func() {
+		if !reservationSuccessful {
+			log.Debug("deleting-session")
+			c.deleteSession()
+		}
+	}()
+
+	session, sessionID, err := c.createSession(ttl, -1)
+	if err != nil {
+		log.Errorw("no-session-created", log.Fields{"error": err})
+		return "", errors.New("no-session-created")
+	}
+	log.Debugw("session-created", log.Fields{"session-id": sessionID})
+	c.sessionID = sessionID
+	c.session = session
+
+	// Try to grap the Key using the session
+	kv := c.consul.KV()
+	kvp := consulapi.KVPair{Key: key, Value: val, Session: c.sessionID}
+	result, _, err := kv.Acquire(&kvp, nil)
+	if err != nil {
+		log.Errorw("error-acquiring-keys", log.Fields{"error": err})
+		return nil, err
+	}
+
+	log.Debugw("key-acquired", log.Fields{"key": key, "status": result})
+
+	// Irrespective whether we were successful in acquiring the key, let's read it back and see if it's us.
+	m, err := c.Get(key, defaultKVGetTimeout)
+	if err != nil {
+		return nil, err
+	}
+	if m != nil {
+		log.Debugw("response-received", log.Fields{"key": m.Key, "m.value": string(m.Value.([]byte)), "value": value})
+		if m.Key == key && isEqual(m.Value, value) {
+			// My reservation is successful - register it.  For now, support is only for 1 reservation per key
+			// per session.
+			reservationSuccessful = true
+			c.writeLock.Lock()
+			c.keyReservations[key] = m.Value
+			c.writeLock.Unlock()
+			return m.Value, nil
+		}
+		// My reservation has failed.  Return the owner of that key
+		return m.Value, nil
+	}
+	return nil, nil
+}
+
+// ReleaseAllReservations releases all key reservations previously made (using Reserve API)
+func (c *ConsulClient) ReleaseAllReservations() error {
+	kv := c.consul.KV()
+	var kvp consulapi.KVPair
+	var result bool
+	var err error
+
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+
+	for key, value := range c.keyReservations {
+		kvp = consulapi.KVPair{Key: key, Value: value.([]byte), Session: c.sessionID}
+		result, _, err = kv.Release(&kvp, nil)
+		if err != nil {
+			log.Errorw("cannot-release-reservation", log.Fields{"key": key, "error": err})
+			return err
+		}
+		if !result {
+			log.Errorw("cannot-release-reservation", log.Fields{"key": key})
+		}
+		delete(c.keyReservations, key)
+	}
+	return nil
+}
+
+// ReleaseReservation releases reservation for a specific key.
+func (c *ConsulClient) ReleaseReservation(key string) error {
+	var ok bool
+	var reservedValue interface{}
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if reservedValue, ok = c.keyReservations[key]; !ok {
+		return errors.New("key-not-reserved:" + key)
+	}
+	// Release the reservation
+	kv := c.consul.KV()
+	kvp := consulapi.KVPair{Key: key, Value: reservedValue.([]byte), Session: c.sessionID}
+
+	result, _, er := kv.Release(&kvp, nil)
+	if er != nil {
+		return er
+	}
+	// Remove that key entry on success
+	if result {
+		delete(c.keyReservations, key)
+		return nil
+	}
+	return errors.New("key-cannot-be-unreserved")
+}
+
+// RenewReservation renews a reservation.  A reservation will go stale after the specified TTL (Time To Live)
+// period specified when reserving the key
+func (c *ConsulClient) RenewReservation(key string) error {
+	// In the case of Consul, renew reservation of a reserve key only require renewing the client session.
+
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+
+	// Verify the key was reserved
+	if _, ok := c.keyReservations[key]; !ok {
+		return errors.New("key-not-reserved")
+	}
+
+	if c.session == nil {
+		return errors.New("no-session-exist")
+	}
+
+	var writeOptions consulapi.WriteOptions
+	if _, _, err := c.session.Renew(c.sessionID, &writeOptions); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Watch provides the watch capability on a given key.  It returns a channel onto which the callee needs to
+// listen to receive Events.
+func (c *ConsulClient) Watch(key string) chan *Event {
+
+	// Create a new channel
+	ch := make(chan *Event, maxClientChannelBufferSize)
+
+	// Create a context to track this request
+	watchContext, cFunc := context.WithCancel(context.Background())
+
+	// Save the channel and context reference for later
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	ccm := channelContextMap{channel: ch, ctx: watchContext, cancel: cFunc}
+	c.watchedChannelsContext[key] = append(c.watchedChannelsContext[key], &ccm)
+
+	// Launch a go routine to listen for updates
+	go c.listenForKeyChange(watchContext, key, ch)
+
+	return ch
+}
+
+// CloseWatch closes a specific watch. Both the key and the channel are required when closing a watch as there
+// may be multiple listeners on the same key.  The previously created channel serves as a key
+func (c *ConsulClient) CloseWatch(key string, ch chan *Event) {
+	// First close the context
+	var ok bool
+	var watchedChannelsContexts []*channelContextMap
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if watchedChannelsContexts, ok = c.watchedChannelsContext[key]; !ok {
+		log.Errorw("key-has-no-watched-context-or-channel", log.Fields{"key": key})
+		return
+	}
+	// Look for the channels
+	var pos = -1
+	for i, chCtxMap := range watchedChannelsContexts {
+		if chCtxMap.channel == ch {
+			log.Debug("channel-found")
+			chCtxMap.cancel()
+			//close the channel
+			close(ch)
+			pos = i
+			break
+		}
+	}
+	// Remove that entry if present
+	if pos >= 0 {
+		c.watchedChannelsContext[key] = append(c.watchedChannelsContext[key][:pos], c.watchedChannelsContext[key][pos+1:]...)
+	}
+	log.Debugw("watched-channel-exiting", log.Fields{"key": key, "channel": c.watchedChannelsContext[key]})
+}
+
+func (c *ConsulClient) isKVEqual(kv1 *consulapi.KVPair, kv2 *consulapi.KVPair) bool {
+	if (kv1 == nil) && (kv2 == nil) {
+		return true
+	} else if (kv1 == nil) || (kv2 == nil) {
+		return false
+	}
+	// Both the KV should be non-null here
+	if kv1.Key != kv2.Key ||
+		!bytes.Equal(kv1.Value, kv2.Value) ||
+		kv1.Session != kv2.Session ||
+		kv1.LockIndex != kv2.LockIndex ||
+		kv1.ModifyIndex != kv2.ModifyIndex {
+		return false
+	}
+	return true
+}
+
+func (c *ConsulClient) listenForKeyChange(watchContext context.Context, key string, ch chan *Event) {
+	log.Debugw("start-watching-channel", log.Fields{"key": key, "channel": ch})
+
+	defer c.CloseWatch(key, ch)
+	duration := GetDuration(defaultKVGetTimeout)
+	kv := c.consul.KV()
+	var queryOptions consulapi.QueryOptions
+	queryOptions.WaitTime = duration
+
+	// Get the existing value, if any
+	previousKVPair, meta, err := kv.Get(key, &queryOptions)
+	if err != nil {
+		log.Debug(err)
+	}
+	lastIndex := meta.LastIndex
+
+	// Wait for change.  Push any change onto the channel and keep waiting for new update
+	//var waitOptions consulapi.QueryOptions
+	var pair *consulapi.KVPair
+	//watchContext, _ := context.WithCancel(context.Background())
+	waitOptions := queryOptions.WithContext(watchContext)
+	for {
+		//waitOptions = consulapi.QueryOptions{WaitIndex: lastIndex}
+		waitOptions.WaitIndex = lastIndex
+		pair, meta, err = kv.Get(key, waitOptions)
+		select {
+		case <-watchContext.Done():
+			log.Debug("done-event-received-exiting")
+			return
+		default:
+			if err != nil {
+				log.Warnw("error-from-watch", log.Fields{"error": err})
+				ch <- NewEvent(CONNECTIONDOWN, key, []byte(""), -1)
+			} else {
+				log.Debugw("index-state", log.Fields{"lastindex": lastIndex, "newindex": meta.LastIndex, "key": key})
+			}
+		}
+		if err != nil {
+			log.Debug(err)
+			// On error, block for 10 milliseconds to prevent endless loop
+			time.Sleep(10 * time.Millisecond)
+		} else if meta.LastIndex <= lastIndex {
+			log.Info("no-index-change-or-negative")
+		} else {
+			log.Debugw("update-received", log.Fields{"pair": pair})
+			if pair == nil {
+				ch <- NewEvent(DELETE, key, []byte(""), -1)
+			} else if !c.isKVEqual(pair, previousKVPair) {
+				// Push the change onto the channel if the data has changed
+				// For now just assume it's a PUT change
+				log.Debugw("pair-details", log.Fields{"session": pair.Session, "key": pair.Key, "value": pair.Value})
+				ch <- NewEvent(PUT, pair.Key, pair.Value, -1)
+			}
+			previousKVPair = pair
+			lastIndex = meta.LastIndex
+		}
+	}
+}
+
+// Close closes the KV store client
+func (c *ConsulClient) Close() {
+	var writeOptions consulapi.WriteOptions
+	// Inform any goroutine it's time to say goodbye.
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if c.doneCh != nil {
+		close(*c.doneCh)
+	}
+
+	// Clear the sessionID
+	if _, err := c.consul.Session().Destroy(c.sessionID, &writeOptions); err != nil {
+		log.Errorw("error-closing-client", log.Fields{"error": err})
+	}
+}
+
+func (c *ConsulClient) AcquireLock(lockName string, timeout int) error {
+	return nil
+}
+
+func (c *ConsulClient) ReleaseLock(lockName string) error {
+	return nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/etcdclient.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/etcdclient.go
new file mode 100644
index 0000000..beac4e0
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/etcdclient.go
@@ -0,0 +1,504 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kvstore
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	v3Client "go.etcd.io/etcd/clientv3"
+	v3Concurrency "go.etcd.io/etcd/clientv3/concurrency"
+	v3rpcTypes "go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
+	"sync"
+)
+
+// EtcdClient represents the Etcd KV store client
+type EtcdClient struct {
+	ectdAPI          *v3Client.Client
+	leaderRev        v3Client.Client
+	keyReservations  map[string]*v3Client.LeaseID
+	watchedChannels  sync.Map
+	writeLock        sync.Mutex
+	lockToMutexMap   map[string]*v3Concurrency.Mutex
+	lockToSessionMap map[string]*v3Concurrency.Session
+	lockToMutexLock  sync.Mutex
+}
+
+// NewEtcdClient returns a new client for the Etcd KV store
+func NewEtcdClient(addr string, timeout int) (*EtcdClient, error) {
+	duration := GetDuration(timeout)
+
+	c, err := v3Client.New(v3Client.Config{
+		Endpoints:   []string{addr},
+		DialTimeout: duration,
+	})
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+
+	reservations := make(map[string]*v3Client.LeaseID)
+	lockMutexMap := make(map[string]*v3Concurrency.Mutex)
+	lockSessionMap := make(map[string]*v3Concurrency.Session)
+
+	return &EtcdClient{ectdAPI: c, keyReservations: reservations, lockToMutexMap: lockMutexMap,
+		lockToSessionMap: lockSessionMap}, nil
+}
+
+// IsConnectionUp returns whether the connection to the Etcd KV store is up.  If a timeout occurs then
+// it is assumed the connection is down or unreachable.
+func (c *EtcdClient) IsConnectionUp(timeout int) bool {
+	// Let's try to get a non existent key.  If the connection is up then there will be no error returned.
+	if _, err := c.Get("non-existent-key", timeout); err != nil {
+		return false
+	}
+	return true
+}
+
+// List returns an array of key-value pairs with key as a prefix.  Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) List(key string, timeout int, lock ...bool) (map[string]*KVPair, error) {
+	duration := GetDuration(timeout)
+
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+
+	resp, err := c.ectdAPI.Get(ctx, key, v3Client.WithPrefix())
+	cancel()
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	m := make(map[string]*KVPair)
+	for _, ev := range resp.Kvs {
+		m[string(ev.Key)] = NewKVPair(string(ev.Key), ev.Value, "", ev.Lease, ev.Version)
+	}
+	return m, nil
+}
+
+// Get returns a key-value pair for a given key. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Get(key string, timeout int, lock ...bool) (*KVPair, error) {
+	duration := GetDuration(timeout)
+
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+
+	resp, err := c.ectdAPI.Get(ctx, key)
+	cancel()
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	for _, ev := range resp.Kvs {
+		// Only one value is returned
+		return NewKVPair(string(ev.Key), ev.Value, "", ev.Lease, ev.Version), nil
+	}
+	return nil, nil
+}
+
+// Put writes a key-value pair to the KV store.  Value can only be a string or []byte since the etcd API
+// accepts only a string as a value for a put operation. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Put(key string, value interface{}, timeout int, lock ...bool) error {
+
+	// Validate that we can convert value to a string as etcd API expects a string
+	var val string
+	var er error
+	if val, er = ToString(value); er != nil {
+		return fmt.Errorf("unexpected-type-%T", value)
+	}
+
+	duration := GetDuration(timeout)
+
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+
+	var err error
+	// Check if there is already a lease for this key - if there is then use it, otherwise a PUT will make
+	// that KV key permanent instead of automatically removing it after a lease expiration
+	if leaseID, ok := c.keyReservations[key]; ok {
+		_, err = c.ectdAPI.Put(ctx, key, val, v3Client.WithLease(*leaseID))
+	} else {
+		_, err = c.ectdAPI.Put(ctx, key, val)
+	}
+	cancel()
+	if err != nil {
+		switch err {
+		case context.Canceled:
+			log.Warnw("context-cancelled", log.Fields{"error": err})
+		case context.DeadlineExceeded:
+			log.Warnw("context-deadline-exceeded", log.Fields{"error": err})
+		case v3rpcTypes.ErrEmptyKey:
+			log.Warnw("etcd-client-error", log.Fields{"error": err})
+		default:
+			log.Warnw("bad-endpoints", log.Fields{"error": err})
+		}
+		return err
+	}
+	return nil
+}
+
+// Delete removes a key from the KV store. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Delete(key string, timeout int, lock ...bool) error {
+
+	duration := GetDuration(timeout)
+
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+
+	defer cancel()
+
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+
+	// delete the key
+	if _, err := c.ectdAPI.Delete(ctx, key); err != nil {
+		log.Errorw("failed-to-delete-key", log.Fields{"key": key, "error": err})
+		return err
+	}
+	log.Debugw("key(s)-deleted", log.Fields{"key": key})
+	return nil
+}
+
+// Reserve is invoked to acquire a key and set it to a given value. Value can only be a string or []byte since
+// the etcd API accepts only a string.  Timeout defines how long the function will wait for a response.  TTL
+// defines how long that reservation is valid.  When TTL expires the key is unreserved by the KV store itself.
+// If the key is acquired then the value returned will be the value passed in.  If the key is already acquired
+// then the value assigned to that key will be returned.
+func (c *EtcdClient) Reserve(key string, value interface{}, ttl int64) (interface{}, error) {
+	// Validate that we can convert value to a string as etcd API expects a string
+	var val string
+	var er error
+	if val, er = ToString(value); er != nil {
+		return nil, fmt.Errorf("unexpected-type%T", value)
+	}
+
+	// Create a lease
+	resp, err := c.ectdAPI.Grant(context.Background(), ttl)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	// Register the lease id
+	c.writeLock.Lock()
+	c.keyReservations[key] = &resp.ID
+	c.writeLock.Unlock()
+
+	// Revoke lease if reservation is not successful
+	reservationSuccessful := false
+	defer func() {
+		if !reservationSuccessful {
+			if err = c.ReleaseReservation(key); err != nil {
+				log.Error("cannot-release-lease")
+			}
+		}
+	}()
+
+	// Try to grap the Key with the above lease
+	c.ectdAPI.Txn(context.Background())
+	txn := c.ectdAPI.Txn(context.Background())
+	txn = txn.If(v3Client.Compare(v3Client.Version(key), "=", 0))
+	txn = txn.Then(v3Client.OpPut(key, val, v3Client.WithLease(resp.ID)))
+	txn = txn.Else(v3Client.OpGet(key))
+	result, er := txn.Commit()
+	if er != nil {
+		return nil, er
+	}
+
+	if !result.Succeeded {
+		// Verify whether we are already the owner of that Key
+		if len(result.Responses) > 0 &&
+			len(result.Responses[0].GetResponseRange().Kvs) > 0 {
+			kv := result.Responses[0].GetResponseRange().Kvs[0]
+			if string(kv.Value) == val {
+				reservationSuccessful = true
+				return value, nil
+			}
+			return kv.Value, nil
+		}
+	} else {
+		// Read the Key to ensure this is our Key
+		m, err := c.Get(key, defaultKVGetTimeout, false)
+		if err != nil {
+			return nil, err
+		}
+		if m != nil {
+			if m.Key == key && isEqual(m.Value, value) {
+				// My reservation is successful - register it.  For now, support is only for 1 reservation per key
+				// per session.
+				reservationSuccessful = true
+				return value, nil
+			}
+			// My reservation has failed.  Return the owner of that key
+			return m.Value, nil
+		}
+	}
+	return nil, nil
+}
+
+// ReleaseAllReservations releases all key reservations previously made (using Reserve API)
+func (c *EtcdClient) ReleaseAllReservations() error {
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	for key, leaseID := range c.keyReservations {
+		_, err := c.ectdAPI.Revoke(context.Background(), *leaseID)
+		if err != nil {
+			log.Errorw("cannot-release-reservation", log.Fields{"key": key, "error": err})
+			return err
+		}
+		delete(c.keyReservations, key)
+	}
+	return nil
+}
+
+// ReleaseReservation releases reservation for a specific key.
+func (c *EtcdClient) ReleaseReservation(key string) error {
+	// Get the leaseid using the key
+	log.Debugw("Release-reservation", log.Fields{"key": key})
+	var ok bool
+	var leaseID *v3Client.LeaseID
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if leaseID, ok = c.keyReservations[key]; !ok {
+		return nil
+	}
+	if leaseID != nil {
+		_, err := c.ectdAPI.Revoke(context.Background(), *leaseID)
+		if err != nil {
+			log.Error(err)
+			return err
+		}
+		delete(c.keyReservations, key)
+	}
+	return nil
+}
+
+// RenewReservation renews a reservation.  A reservation will go stale after the specified TTL (Time To Live)
+// period specified when reserving the key
+func (c *EtcdClient) RenewReservation(key string) error {
+	// Get the leaseid using the key
+	var ok bool
+	var leaseID *v3Client.LeaseID
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if leaseID, ok = c.keyReservations[key]; !ok {
+		return errors.New("key-not-reserved")
+	}
+
+	if leaseID != nil {
+		_, err := c.ectdAPI.KeepAliveOnce(context.Background(), *leaseID)
+		if err != nil {
+			log.Errorw("lease-may-have-expired", log.Fields{"error": err})
+			return err
+		}
+	} else {
+		return errors.New("lease-expired")
+	}
+	return nil
+}
+
+// Watch provides the watch capability on a given key.  It returns a channel onto which the callee needs to
+// listen to receive Events.
+func (c *EtcdClient) Watch(key string) chan *Event {
+	w := v3Client.NewWatcher(c.ectdAPI)
+	ctx, cancel := context.WithCancel(context.Background())
+	channel := w.Watch(ctx, key)
+
+	// Create a new channel
+	ch := make(chan *Event, maxClientChannelBufferSize)
+
+	// Keep track of the created channels so they can be closed when required
+	channelMap := make(map[chan *Event]v3Client.Watcher)
+	channelMap[ch] = w
+
+	channelMaps := c.addChannelMap(key, channelMap)
+
+	// Changing the log field (from channelMaps) as the underlying logger cannot format the map of channels into a
+	// json format.
+	log.Debugw("watched-channels", log.Fields{"len": len(channelMaps)})
+	// Launch a go routine to listen for updates
+	go c.listenForKeyChange(channel, ch, cancel)
+
+	return ch
+
+}
+
+func (c *EtcdClient) addChannelMap(key string, channelMap map[chan *Event]v3Client.Watcher) []map[chan *Event]v3Client.Watcher {
+	var channels interface{}
+	var exists bool
+
+	if channels, exists = c.watchedChannels.Load(key); exists {
+		channels = append(channels.([]map[chan *Event]v3Client.Watcher), channelMap)
+	} else {
+		channels = []map[chan *Event]v3Client.Watcher{channelMap}
+	}
+	c.watchedChannels.Store(key, channels)
+
+	return channels.([]map[chan *Event]v3Client.Watcher)
+}
+
+func (c *EtcdClient) removeChannelMap(key string, pos int) []map[chan *Event]v3Client.Watcher {
+	var channels interface{}
+	var exists bool
+
+	if channels, exists = c.watchedChannels.Load(key); exists {
+		channels = append(channels.([]map[chan *Event]v3Client.Watcher)[:pos], channels.([]map[chan *Event]v3Client.Watcher)[pos+1:]...)
+		c.watchedChannels.Store(key, channels)
+	}
+
+	return channels.([]map[chan *Event]v3Client.Watcher)
+}
+
+func (c *EtcdClient) getChannelMaps(key string) ([]map[chan *Event]v3Client.Watcher, bool) {
+	var channels interface{}
+	var exists bool
+
+	channels, exists = c.watchedChannels.Load(key)
+
+	if channels == nil {
+		return nil, exists
+	}
+
+	return channels.([]map[chan *Event]v3Client.Watcher), exists
+}
+
+// CloseWatch closes a specific watch. Both the key and the channel are required when closing a watch as there
+// may be multiple listeners on the same key.  The previously created channel serves as a key
+func (c *EtcdClient) CloseWatch(key string, ch chan *Event) {
+	// Get the array of channels mapping
+	var watchedChannels []map[chan *Event]v3Client.Watcher
+	var ok bool
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+
+	if watchedChannels, ok = c.getChannelMaps(key); !ok {
+		log.Warnw("key-has-no-watched-channels", log.Fields{"key": key})
+		return
+	}
+	// Look for the channels
+	var pos = -1
+	for i, chMap := range watchedChannels {
+		if t, ok := chMap[ch]; ok {
+			log.Debug("channel-found")
+			// Close the etcd watcher before the client channel.  This should close the etcd channel as well
+			if err := t.Close(); err != nil {
+				log.Errorw("watcher-cannot-be-closed", log.Fields{"key": key, "error": err})
+			}
+			pos = i
+			break
+		}
+	}
+
+	channelMaps, _ := c.getChannelMaps(key)
+	// Remove that entry if present
+	if pos >= 0 {
+		channelMaps = c.removeChannelMap(key, pos)
+	}
+	log.Infow("watcher-channel-exiting", log.Fields{"key": key, "channel": channelMaps})
+}
+
+func (c *EtcdClient) listenForKeyChange(channel v3Client.WatchChan, ch chan<- *Event, cancel context.CancelFunc) {
+	log.Debug("start-listening-on-channel ...")
+	defer cancel()
+	defer close(ch)
+	for resp := range channel {
+		for _, ev := range resp.Events {
+			ch <- NewEvent(getEventType(ev), ev.Kv.Key, ev.Kv.Value, ev.Kv.Version)
+		}
+	}
+	log.Debug("stop-listening-on-channel ...")
+}
+
+func getEventType(event *v3Client.Event) int {
+	switch event.Type {
+	case v3Client.EventTypePut:
+		return PUT
+	case v3Client.EventTypeDelete:
+		return DELETE
+	}
+	return UNKNOWN
+}
+
+// Close closes the KV store client
+func (c *EtcdClient) Close() {
+	c.writeLock.Lock()
+	defer c.writeLock.Unlock()
+	if err := c.ectdAPI.Close(); err != nil {
+		log.Errorw("error-closing-client", log.Fields{"error": err})
+	}
+}
+
+func (c *EtcdClient) addLockName(lockName string, lock *v3Concurrency.Mutex, session *v3Concurrency.Session) {
+	c.lockToMutexLock.Lock()
+	defer c.lockToMutexLock.Unlock()
+	c.lockToMutexMap[lockName] = lock
+	c.lockToSessionMap[lockName] = session
+}
+
+func (c *EtcdClient) deleteLockName(lockName string) {
+	c.lockToMutexLock.Lock()
+	defer c.lockToMutexLock.Unlock()
+	delete(c.lockToMutexMap, lockName)
+	delete(c.lockToSessionMap, lockName)
+}
+
+func (c *EtcdClient) getLock(lockName string) (*v3Concurrency.Mutex, *v3Concurrency.Session) {
+	c.lockToMutexLock.Lock()
+	defer c.lockToMutexLock.Unlock()
+	var lock *v3Concurrency.Mutex
+	var session *v3Concurrency.Session
+	if l, exist := c.lockToMutexMap[lockName]; exist {
+		lock = l
+	}
+	if s, exist := c.lockToSessionMap[lockName]; exist {
+		session = s
+	}
+	return lock, session
+}
+
+func (c *EtcdClient) AcquireLock(lockName string, timeout int) error {
+	duration := GetDuration(timeout)
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+	defer cancel()
+	session, _ := v3Concurrency.NewSession(c.ectdAPI, v3Concurrency.WithContext(ctx))
+	mu := v3Concurrency.NewMutex(session, "/devicelock_"+lockName)
+	if err := mu.Lock(context.Background()); err != nil {
+		cancel()
+		return err
+	}
+	c.addLockName(lockName, mu, session)
+	return nil
+}
+
+func (c *EtcdClient) ReleaseLock(lockName string) error {
+	lock, session := c.getLock(lockName)
+	var err error
+	if lock != nil {
+		if e := lock.Unlock(context.Background()); e != nil {
+			err = e
+		}
+	}
+	if session != nil {
+		if e := session.Close(); e != nil {
+			err = e
+		}
+	}
+	c.deleteLockName(lockName)
+
+	return err
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/kvutils.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/kvutils.go
new file mode 100644
index 0000000..cf9a95c
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/kvstore/kvutils.go
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kvstore
+
+import (
+	"fmt"
+	"time"
+)
+
+// GetDuration converts a timeout value from int to duration.  If the timeout value is
+// either not set of -ve then we default KV timeout (configurable) is used.
+func GetDuration(timeout int) time.Duration {
+	if timeout <= 0 {
+		return defaultKVGetTimeout * time.Second
+	}
+	return time.Duration(timeout) * time.Second
+}
+
+// ToString converts an interface value to a string.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToString(value interface{}) (string, error) {
+	switch t := value.(type) {
+	case []byte:
+		return string(value.([]byte)), nil
+	case string:
+		return value.(string), nil
+	default:
+		return "", fmt.Errorf("unexpected-type-%T", t)
+	}
+}
+
+// ToByte converts an interface value to a []byte.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToByte(value interface{}) ([]byte, error) {
+	switch t := value.(type) {
+	case []byte:
+		return value.([]byte), nil
+	case string:
+		return []byte(value.(string)), nil
+	default:
+		return nil, fmt.Errorf("unexpected-type-%T", t)
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/backend.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/backend.go
new file mode 100644
index 0000000..fb2c813
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/backend.go
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"errors"
+	"fmt"
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"strconv"
+	"sync"
+	"time"
+)
+
+//TODO: missing cache stuff
+//TODO: missing retry stuff
+//TODO: missing proper logging
+
+// Backend structure holds details for accessing the kv store
+type Backend struct {
+	sync.RWMutex
+	Client     kvstore.Client
+	StoreType  string
+	Host       string
+	Port       int
+	Timeout    int
+	PathPrefix string
+}
+
+// NewBackend creates a new instance of a Backend structure
+func NewBackend(storeType string, host string, port int, timeout int, pathPrefix string) *Backend {
+	var err error
+
+	b := &Backend{
+		StoreType:  storeType,
+		Host:       host,
+		Port:       port,
+		Timeout:    timeout,
+		PathPrefix: pathPrefix,
+	}
+
+	address := host + ":" + strconv.Itoa(port)
+	if b.Client, err = b.newClient(address, timeout); err != nil {
+		log.Errorw("failed-to-create-kv-client",
+			log.Fields{
+				"type": storeType, "host": host, "port": port,
+				"timeout": timeout, "prefix": pathPrefix,
+				"error": err.Error(),
+			})
+	}
+
+	return b
+}
+
+func (b *Backend) newClient(address string, timeout int) (kvstore.Client, error) {
+	switch b.StoreType {
+	case "consul":
+		return kvstore.NewConsulClient(address, timeout)
+	case "etcd":
+		return kvstore.NewEtcdClient(address, timeout)
+	}
+	return nil, errors.New("unsupported-kv-store")
+}
+
+func (b *Backend) makePath(key string) string {
+	path := fmt.Sprintf("%s/%s", b.PathPrefix, key)
+	return path
+}
+
+// List retrieves one or more items that match the specified key
+func (b *Backend) List(key string, lock ...bool) (map[string]*kvstore.KVPair, error) {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("listing-key", log.Fields{"key": key, "path": formattedPath, "lock": lock})
+
+	return b.Client.List(formattedPath, b.Timeout, lock...)
+}
+
+// Get retrieves an item that matches the specified key
+func (b *Backend) Get(key string, lock ...bool) (*kvstore.KVPair, error) {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("getting-key", log.Fields{"key": key, "path": formattedPath, "lock": lock})
+
+	start := time.Now()
+	err, pair := b.Client.Get(formattedPath, b.Timeout, lock...)
+	stop := time.Now()
+
+	GetProfiling().AddToDatabaseRetrieveTime(stop.Sub(start).Seconds())
+
+	return err, pair
+}
+
+// Put stores an item value under the specifed key
+func (b *Backend) Put(key string, value interface{}, lock ...bool) error {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("putting-key", log.Fields{"key": key, "value": string(value.([]byte)), "path": formattedPath, "lock": lock})
+
+	return b.Client.Put(formattedPath, value, b.Timeout, lock...)
+}
+
+// Delete removes an item under the specified key
+func (b *Backend) Delete(key string, lock ...bool) error {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("deleting-key", log.Fields{"key": key, "path": formattedPath, "lock": lock})
+
+	return b.Client.Delete(formattedPath, b.Timeout, lock...)
+}
+
+// CreateWatch starts watching events for the specified key
+func (b *Backend) CreateWatch(key string) chan *kvstore.Event {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("creating-key-watch", log.Fields{"key": key, "path": formattedPath})
+
+	return b.Client.Watch(formattedPath)
+}
+
+// DeleteWatch stops watching events for the specified key
+func (b *Backend) DeleteWatch(key string, ch chan *kvstore.Event) {
+	b.Lock()
+	defer b.Unlock()
+
+	formattedPath := b.makePath(key)
+	log.Debugw("deleting-key-watch", log.Fields{"key": key, "path": formattedPath})
+
+	b.Client.CloseWatch(formattedPath, ch)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/branch.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/branch.go
new file mode 100644
index 0000000..2075b7e
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/branch.go
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"sync"
+)
+
+// TODO: implement weak references or something equivalent
+// TODO: missing proper logging
+
+// Branch structure is used to classify a collection of transaction based revisions
+type Branch struct {
+	mutex      sync.RWMutex
+	Node       *node
+	Txid       string
+	Origin     Revision
+	Revisions  map[string]Revision
+	LatestLock sync.RWMutex
+	Latest     Revision
+}
+
+// NewBranch creates a new instance of the Branch structure
+func NewBranch(node *node, txid string, origin Revision, autoPrune bool) *Branch {
+	b := &Branch{}
+	b.Node = node
+	b.Txid = txid
+	b.Origin = origin
+	b.Revisions = make(map[string]Revision)
+	b.Latest = origin
+
+	return b
+}
+
+// Utility function to extract all children names for a given revision (mostly for debugging purposes)
+func (b *Branch) retrieveChildrenNames(revision Revision) []string {
+	var childrenNames []string
+
+	for _, child := range revision.GetChildren("devices") {
+		childrenNames = append(childrenNames, child.GetName())
+	}
+
+	return childrenNames
+}
+
+// Utility function to compare children names and report the missing ones (mostly for debugging purposes)
+func (b *Branch) findMissingChildrenNames(previousNames, latestNames []string) []string {
+	var missingNames []string
+
+	for _, previousName := range previousNames {
+		found := false
+
+		if len(latestNames) == 0 {
+			break
+		}
+
+		for _, latestName := range latestNames {
+			if previousName == latestName {
+				found = true
+				break
+			}
+		}
+		if !found {
+			missingNames = append(missingNames, previousName)
+		}
+	}
+
+	return missingNames
+}
+
+// SetLatest assigns the latest revision for this branch
+func (b *Branch) SetLatest(latest Revision) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	if b.Latest != nil {
+		log.Debugw("updating-latest-revision", log.Fields{"current": b.Latest.GetHash(), "new": latest.GetHash()})
+
+		// Go through list of children names in current revision and new revision
+		// and then compare the resulting outputs to ensure that we have not lost any entries.
+
+		if level, _ := log.GetPackageLogLevel(); level == log.DebugLevel {
+			var previousNames, latestNames, missingNames []string
+
+			if previousNames = b.retrieveChildrenNames(b.Latest); len(previousNames) > 0 {
+				log.Debugw("children-of-previous-revision", log.Fields{"hash": b.Latest.GetHash(), "names": previousNames})
+			}
+
+			if latestNames = b.retrieveChildrenNames(b.Latest); len(latestNames) > 0 {
+				log.Debugw("children-of-latest-revision", log.Fields{"hash": latest.GetHash(), "names": latestNames})
+			}
+
+			if missingNames = b.findMissingChildrenNames(previousNames, latestNames); len(missingNames) > 0 {
+				log.Debugw("children-missing-in-latest-revision", log.Fields{"hash": latest.GetHash(), "names": missingNames})
+			}
+		}
+
+	} else {
+		log.Debugw("setting-latest-revision", log.Fields{"new": latest.GetHash()})
+	}
+
+	b.Latest = latest
+}
+
+// GetLatest retrieves the latest revision of the branch
+func (b *Branch) GetLatest() Revision {
+	b.mutex.RLock()
+	defer b.mutex.RUnlock()
+
+	return b.Latest
+}
+
+// GetOrigin retrieves the original revision of the branch
+func (b *Branch) GetOrigin() Revision {
+	b.mutex.RLock()
+	defer b.mutex.RUnlock()
+
+	return b.Origin
+}
+
+// AddRevision inserts a new revision to the branch
+func (b *Branch) AddRevision(revision Revision) {
+	if revision != nil && b.GetRevision(revision.GetHash()) == nil {
+		b.SetRevision(revision.GetHash(), revision)
+	}
+}
+
+// GetRevision pulls a revision entry at the specified hash
+func (b *Branch) GetRevision(hash string) Revision {
+	b.mutex.RLock()
+	defer b.mutex.RUnlock()
+
+	if revision, ok := b.Revisions[hash]; ok {
+		return revision
+	}
+
+	return nil
+}
+
+// SetRevision updates a revision entry at the specified hash
+func (b *Branch) SetRevision(hash string, revision Revision) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	b.Revisions[hash] = revision
+}
+
+// DeleteRevision removes a revision with the specified hash
+func (b *Branch) DeleteRevision(hash string) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	if _, ok := b.Revisions[hash]; ok {
+		delete(b.Revisions, hash)
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/callback_type.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/callback_type.go
new file mode 100644
index 0000000..b530dee
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/callback_type.go
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+// CallbackType is an enumerated value to express when a callback should be executed
+type CallbackType uint8
+
+// Enumerated list of callback types
+const (
+	GET CallbackType = iota
+	PRE_UPDATE
+	POST_UPDATE
+	PRE_ADD
+	POST_ADD
+	PRE_REMOVE
+	POST_REMOVE
+	POST_LISTCHANGE
+)
+
+var enumCallbackTypes = []string{
+	"GET",
+	"PRE_UPDATE",
+	"POST_UPDATE",
+	"PRE_ADD",
+	"POST_ADD",
+	"PRE_REMOVE",
+	"POST_REMOVE",
+	"POST_LISTCHANGE",
+}
+
+func (t CallbackType) String() string {
+	return enumCallbackTypes[t]
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/child_type.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/child_type.go
new file mode 100644
index 0000000..fae9844
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/child_type.go
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	desc "github.com/golang/protobuf/descriptor"
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"github.com/opencord/voltha-protos/go/common"
+	"reflect"
+	"strconv"
+	"sync"
+)
+
+type childTypesSingleton struct {
+	mutex sync.RWMutex
+	Cache map[interface{}]map[string]*ChildType
+}
+
+var instanceChildTypes *childTypesSingleton
+var onceChildTypes sync.Once
+
+func getChildTypes() *childTypesSingleton {
+	onceChildTypes.Do(func() {
+		instanceChildTypes = &childTypesSingleton{}
+	})
+	return instanceChildTypes
+}
+
+func (s *childTypesSingleton) GetCache() map[interface{}]map[string]*ChildType {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+	return s.Cache
+}
+
+func (s *childTypesSingleton) SetCache(cache map[interface{}]map[string]*ChildType) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+	s.Cache = cache
+}
+
+func (s *childTypesSingleton) GetCacheEntry(key interface{}) (map[string]*ChildType, bool) {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+	childTypeMap, exists := s.Cache[key]
+	return childTypeMap, exists
+}
+
+func (s *childTypesSingleton) SetCacheEntry(key interface{}, value map[string]*ChildType) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+	s.Cache[key] = value
+}
+
+func (s *childTypesSingleton) ResetCache() {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+	s.Cache = make(map[interface{}]map[string]*ChildType)
+}
+
+// ChildType structure contains construct details of an object
+type ChildType struct {
+	ClassModule string
+	ClassType   reflect.Type
+	IsContainer bool
+	Key         string
+	KeyFromStr  func(s string) interface{}
+}
+
+// ChildrenFields retrieves list of child objects associated to a given interface
+func ChildrenFields(cls interface{}) map[string]*ChildType {
+	if cls == nil {
+		return nil
+	}
+	var names map[string]*ChildType
+	var namesExist bool
+
+	if getChildTypes().Cache == nil {
+		getChildTypes().Cache = make(map[interface{}]map[string]*ChildType)
+	}
+
+	msgType := reflect.TypeOf(cls)
+	inst := getChildTypes()
+
+	if names, namesExist = inst.Cache[msgType.String()]; !namesExist {
+		names = make(map[string]*ChildType)
+
+		_, md := desc.ForMessage(cls.(desc.Message))
+
+		// TODO: Do we need to validate MD for nil, panic or exception?
+		for _, field := range md.Field {
+			if options := field.GetOptions(); options != nil {
+				if proto.HasExtension(options, common.E_ChildNode) {
+					isContainer := *field.Label == descriptor.FieldDescriptorProto_LABEL_REPEATED
+					meta, _ := proto.GetExtension(options, common.E_ChildNode)
+
+					var keyFromStr func(string) interface{}
+					var ct ChildType
+
+					parentType := FindOwnerType(reflect.ValueOf(cls), field.GetName(), 0, false)
+					if meta.(*common.ChildNode).GetKey() != "" {
+						keyType := FindKeyOwner(reflect.New(parentType).Elem().Interface(), meta.(*common.ChildNode).GetKey(), 0)
+
+						switch keyType.(reflect.Type).Name() {
+						case "string":
+							keyFromStr = func(s string) interface{} {
+								return s
+							}
+						case "int32":
+							keyFromStr = func(s string) interface{} {
+								i, _ := strconv.Atoi(s)
+								return int32(i)
+							}
+						case "int64":
+							keyFromStr = func(s string) interface{} {
+								i, _ := strconv.Atoi(s)
+								return int64(i)
+							}
+						case "uint32":
+							keyFromStr = func(s string) interface{} {
+								i, _ := strconv.Atoi(s)
+								return uint32(i)
+							}
+						case "uint64":
+							keyFromStr = func(s string) interface{} {
+								i, _ := strconv.Atoi(s)
+								return uint64(i)
+							}
+						default:
+							log.Errorf("Key type not implemented - type: %s\n", keyType.(reflect.Type))
+						}
+					}
+
+					ct = ChildType{
+						ClassModule: parentType.String(),
+						ClassType:   parentType,
+						IsContainer: isContainer,
+						Key:         meta.(*common.ChildNode).GetKey(),
+						KeyFromStr:  keyFromStr,
+					}
+
+					names[field.GetName()] = &ct
+				}
+			}
+		}
+
+		getChildTypes().Cache[msgType.String()] = names
+	} else {
+		entry, _ := inst.GetCacheEntry(msgType.String())
+		log.Debugf("Cache entry for %s: %+v", msgType.String(), entry)
+	}
+
+	return names
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/data_revision.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/data_revision.go
new file mode 100644
index 0000000..b930ae1
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/data_revision.go
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/json"
+	"fmt"
+	"github.com/golang/protobuf/proto"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+)
+
+// DataRevision stores the data associated to a revision along with its calculated checksum hash value
+type DataRevision struct {
+	Data interface{}
+	Hash string
+}
+
+// NewDataRevision creates a new instance of a DataRevision structure
+func NewDataRevision(root *root, data interface{}) *DataRevision {
+	dr := DataRevision{}
+	dr.Data = data
+	dr.Hash = dr.hashData(root, data)
+
+	return &dr
+}
+
+func (dr *DataRevision) hashData(root *root, data interface{}) string {
+	var buffer bytes.Buffer
+
+	if IsProtoMessage(data) {
+		if pbdata, err := proto.Marshal(data.(proto.Message)); err != nil {
+			log.Debugf("problem to marshal protobuf data --> err: %s", err.Error())
+		} else {
+			buffer.Write(pbdata)
+			// To ensure uniqueness in case data is nil, also include data type
+			buffer.Write([]byte(reflect.TypeOf(data).String()))
+		}
+
+	} else if reflect.ValueOf(data).IsValid() {
+		dataObj := reflect.New(reflect.TypeOf(data).Elem())
+		if json, err := json.Marshal(dataObj.Interface()); err != nil {
+			log.Debugf("problem to marshal data --> err: %s", err.Error())
+		} else {
+			buffer.Write(json)
+		}
+	} else {
+		dataObj := reflect.New(reflect.TypeOf(data).Elem())
+		buffer.Write(dataObj.Bytes())
+	}
+
+	// Add the root pointer that owns the current data for extra uniqueness
+	rootPtr := fmt.Sprintf("%p", root)
+	buffer.Write([]byte(rootPtr))
+
+	return fmt.Sprintf("%x", md5.Sum(buffer.Bytes()))[:12]
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus.go
new file mode 100644
index 0000000..3af2556
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus.go
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"encoding/json"
+	"github.com/golang/protobuf/proto"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+// EventBus contains the details required to communicate with the event bus mechanism
+type EventBus struct {
+	client *EventBusClient
+	topic  string
+}
+
+// ignoredCallbacks keeps a list of callbacks that should not be advertised on the event bus
+var (
+	ignoredCallbacks = map[CallbackType]struct{}{
+		PRE_ADD:         {},
+		GET:             {},
+		POST_LISTCHANGE: {},
+		PRE_REMOVE:      {},
+		PRE_UPDATE:      {},
+	}
+)
+
+// NewEventBus creates a new instance of the EventBus structure
+func NewEventBus() *EventBus {
+	bus := &EventBus{
+		client: NewEventBusClient(),
+		topic:  "model-change-events",
+	}
+	return bus
+}
+
+// Advertise will publish the provided information to the event bus
+func (bus *EventBus) Advertise(args ...interface{}) interface{} {
+	eventType := args[0].(CallbackType)
+	hash := args[1].(string)
+	data := args[2:]
+
+	if _, ok := ignoredCallbacks[eventType]; ok {
+		log.Debugf("ignoring event - type:%s, data:%+v", eventType, data)
+	}
+	var kind voltha.ConfigEventType_ConfigEventType
+	switch eventType {
+	case POST_ADD:
+		kind = voltha.ConfigEventType_add
+	case POST_REMOVE:
+		kind = voltha.ConfigEventType_remove
+	default:
+		kind = voltha.ConfigEventType_update
+	}
+
+	var msg []byte
+	var err error
+	if IsProtoMessage(data) {
+		if msg, err = proto.Marshal(data[0].(proto.Message)); err != nil {
+			log.Debugf("problem marshalling proto data: %+v, err:%s", data[0], err.Error())
+		}
+	} else if data[0] != nil {
+		if msg, err = json.Marshal(data[0]); err != nil {
+			log.Debugf("problem marshalling json data: %+v, err:%s", data[0], err.Error())
+		}
+	} else {
+		log.Debugf("no data to advertise : %+v", data[0])
+	}
+
+	event := voltha.ConfigEvent{
+		Type: kind,
+		Hash: hash,
+		Data: string(msg),
+	}
+
+	bus.client.Publish(bus.topic, event)
+
+	return nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus_client.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus_client.go
new file mode 100644
index 0000000..fdc02f9
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/event_bus_client.go
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"github.com/opencord/voltha-protos/go/voltha"
+)
+
+// EventBusClient is an abstraction layer structure to communicate with an event bus mechanism
+type EventBusClient struct {
+}
+
+// NewEventBusClient creates a new EventBusClient instance
+func NewEventBusClient() *EventBusClient {
+	return &EventBusClient{}
+}
+
+// Publish sends a event to the bus
+func (ebc *EventBusClient) Publish(topic string, event voltha.ConfigEvent) {
+	log.Debugf("publishing event:%+v, topic:%s\n", event, topic)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/merge.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/merge.go
new file mode 100644
index 0000000..752d025
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/merge.go
@@ -0,0 +1,273 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+)
+
+func revisionsAreEqual(a, b []Revision) bool {
+	// If one is nil, the other must also be nil.
+	if (a == nil) != (b == nil) {
+		return false
+	}
+
+	if len(a) != len(b) {
+		return false
+	}
+
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+type changeAnalysis struct {
+	KeyMap1     map[string]int
+	KeyMap2     map[string]int
+	AddedKeys   map[string]struct{}
+	RemovedKeys map[string]struct{}
+	ChangedKeys map[string]struct{}
+}
+
+func newChangeAnalysis(lst1, lst2 []Revision, keyName string) *changeAnalysis {
+	changes := &changeAnalysis{}
+
+	changes.KeyMap1 = make(map[string]int)
+	changes.KeyMap2 = make(map[string]int)
+
+	changes.AddedKeys = make(map[string]struct{})
+	changes.RemovedKeys = make(map[string]struct{})
+	changes.ChangedKeys = make(map[string]struct{})
+
+	for i, rev := range lst1 {
+		_, v := GetAttributeValue(rev.GetData(), keyName, 0)
+		changes.KeyMap1[v.String()] = i
+	}
+	for i, rev := range lst2 {
+		_, v := GetAttributeValue(rev.GetData(), keyName, 0)
+		changes.KeyMap2[v.String()] = i
+	}
+	for v := range changes.KeyMap2 {
+		if _, ok := changes.KeyMap1[v]; !ok {
+			changes.AddedKeys[v] = struct{}{}
+		}
+	}
+	for v := range changes.KeyMap1 {
+		if _, ok := changes.KeyMap2[v]; !ok {
+			changes.RemovedKeys[v] = struct{}{}
+		}
+	}
+	for v := range changes.KeyMap1 {
+		if _, ok := changes.KeyMap2[v]; ok && lst1[changes.KeyMap1[v]].GetHash() != lst2[changes.KeyMap2[v]].GetHash() {
+			changes.ChangedKeys[v] = struct{}{}
+		}
+	}
+
+	return changes
+}
+
+// Merge3Way takes care of combining the revision contents of the same data set
+func Merge3Way(
+	forkRev, srcRev, dstRev Revision,
+	mergeChildFunc func(Revision) Revision,
+	dryRun bool) (rev Revision, changes []ChangeTuple) {
+
+	log.Debugw("3-way-merge-request", log.Fields{"dryRun": dryRun})
+
+	var configChanged bool
+	var revsToDiscard []Revision
+
+	if dstRev.GetConfig() == forkRev.GetConfig() {
+		configChanged = dstRev.GetConfig() != srcRev.GetConfig()
+	} else {
+		if dstRev.GetConfig().Hash != srcRev.GetConfig().Hash {
+			log.Error("config-collision")
+		}
+		configChanged = true
+	}
+
+	//newChildren := reflect.ValueOf(dstRev.GetAllChildren()).Interface().(map[string][]Revision)
+	newChildren := make(map[string][]Revision)
+	for entryName, childrenEntry := range dstRev.GetAllChildren() {
+		//newRev.Children[entryName] = append(newRev.Children[entryName], childrenEntry...)
+		newChildren[entryName] = make([]Revision, len(childrenEntry))
+		copy(newChildren[entryName], childrenEntry)
+	}
+
+	childrenFields := ChildrenFields(forkRev.GetData())
+
+	for fieldName, field := range childrenFields {
+		forkList := forkRev.GetChildren(fieldName)
+		srcList := srcRev.GetChildren(fieldName)
+		dstList := dstRev.GetChildren(fieldName)
+
+		if revisionsAreEqual(dstList, srcList) {
+			for _, rev := range srcList {
+				mergeChildFunc(rev)
+			}
+			continue
+		}
+
+		if field.Key == "" {
+			if revisionsAreEqual(dstList, forkList) {
+				if !revisionsAreEqual(srcList, forkList) {
+					log.Error("we should not be here")
+				} else {
+					for _, rev := range srcList {
+						newChildren[fieldName] = append(newChildren[fieldName], mergeChildFunc(rev))
+					}
+					if field.IsContainer {
+						changes = append(
+							changes, ChangeTuple{POST_LISTCHANGE,
+								NewOperationContext("", nil, fieldName, ""), nil},
+						)
+					}
+				}
+			} else {
+				if !revisionsAreEqual(srcList, forkList) {
+					log.Error("cannot merge - single child node or un-keyed children list has changed")
+				}
+			}
+		} else {
+			if revisionsAreEqual(dstList, forkList) {
+				src := newChangeAnalysis(forkList, srcList, field.Key)
+
+				newList := make([]Revision, len(srcList))
+				copy(newList, srcList)
+
+				for key := range src.AddedKeys {
+					idx := src.KeyMap2[key]
+					newRev := mergeChildFunc(newList[idx])
+
+					// FIXME: newRev may come back as nil... exclude those entries for now
+					if newRev != nil {
+						newList[idx] = newRev
+						changes = append(changes, ChangeTuple{POST_ADD, newList[idx].GetData(), newRev.GetData()})
+					}
+				}
+				for key := range src.RemovedKeys {
+					oldRev := forkList[src.KeyMap1[key]]
+					revsToDiscard = append(revsToDiscard, oldRev)
+					changes = append(changes, ChangeTuple{POST_REMOVE, oldRev.GetData(), nil})
+				}
+				for key := range src.ChangedKeys {
+					idx := src.KeyMap2[key]
+					newRev := mergeChildFunc(newList[idx])
+
+					// FIXME: newRev may come back as nil... exclude those entries for now
+					if newRev != nil {
+						newList[idx] = newRev
+					}
+				}
+
+				if !dryRun {
+					newChildren[fieldName] = newList
+				}
+			} else {
+				src := newChangeAnalysis(forkList, srcList, field.Key)
+				dst := newChangeAnalysis(forkList, dstList, field.Key)
+
+				newList := make([]Revision, len(dstList))
+				copy(newList, dstList)
+
+				for key := range src.AddedKeys {
+					if _, exists := dst.AddedKeys[key]; exists {
+						childDstRev := dstList[dst.KeyMap2[key]]
+						childSrcRev := srcList[src.KeyMap2[key]]
+						if childDstRev.GetHash() == childSrcRev.GetHash() {
+							mergeChildFunc(childDstRev)
+						} else {
+							log.Error("conflict error - revision has been added is different")
+						}
+					} else {
+						newRev := mergeChildFunc(srcList[src.KeyMap2[key]])
+						newList = append(newList, newRev)
+						changes = append(changes, ChangeTuple{POST_ADD, srcList[src.KeyMap2[key]], newRev.GetData()})
+					}
+				}
+				for key := range src.ChangedKeys {
+					if _, removed := dst.RemovedKeys[key]; removed {
+						log.Error("conflict error - revision has been removed")
+					} else if _, changed := dst.ChangedKeys[key]; changed {
+						childDstRev := dstList[dst.KeyMap2[key]]
+						childSrcRev := srcList[src.KeyMap2[key]]
+						if childDstRev.GetHash() == childSrcRev.GetHash() {
+							mergeChildFunc(childSrcRev)
+						} else if childDstRev.GetConfig().Hash != childSrcRev.GetConfig().Hash {
+							log.Error("conflict error - revision has been changed and is different")
+						} else {
+							newRev := mergeChildFunc(srcList[src.KeyMap2[key]])
+							newList[dst.KeyMap2[key]] = newRev
+						}
+					} else {
+						newRev := mergeChildFunc(srcList[src.KeyMap2[key]])
+						newList[dst.KeyMap2[key]] = newRev
+					}
+				}
+
+				// TODO: how do i sort this map in reverse order?
+				for key := range src.RemovedKeys {
+					if _, changed := dst.ChangedKeys[key]; changed {
+						log.Error("conflict error - revision has changed")
+					}
+					if _, removed := dst.RemovedKeys[key]; !removed {
+						dstIdx := dst.KeyMap2[key]
+						oldRev := newList[dstIdx]
+						revsToDiscard = append(revsToDiscard, oldRev)
+
+						copy(newList[dstIdx:], newList[dstIdx+1:])
+						newList[len(newList)-1] = nil
+						newList = newList[:len(newList)-1]
+
+						changes = append(changes, ChangeTuple{POST_REMOVE, oldRev.GetData(), nil})
+					}
+				}
+
+				if !dryRun {
+					newChildren[fieldName] = newList
+				}
+			}
+		}
+	}
+
+	if !dryRun && len(newChildren) > 0 {
+		if configChanged {
+			rev = srcRev
+		} else {
+			rev = dstRev
+		}
+
+		for _, discarded := range revsToDiscard {
+			discarded.Drop("", true)
+		}
+
+		// FIXME: Do not discard the latest value for now
+		//dstRev.GetBranch().GetLatest().Drop("", configChanged)
+		rev = rev.UpdateAllChildren(newChildren, dstRev.GetBranch())
+
+		if configChanged {
+			changes = append(changes, ChangeTuple{POST_UPDATE, dstRev.GetBranch().GetLatest().GetData(), rev.GetData()})
+		}
+		return rev, changes
+	}
+
+	return nil, nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/model.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/model.go
new file mode 100644
index 0000000..8087919
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/model.go
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package model
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+)
+
+func init() {
+	log.AddPackage(log.JSON, log.InfoLevel, log.Fields{"instanceId": "DB_MODEL"})
+	defer log.CleanUp()
+}
+
+const (
+	// period to determine when data requires a refresh (in milliseconds)
+	// TODO: make this configurable?
+	DataRefreshPeriod int64 = 5000
+
+	// Attribute used to store a timestamp in the context object
+	RequestTimestamp = "request-timestamp"
+
+	// Time limit for a KV path reservation (in seconds)
+	ReservationTTL int64 = 180
+)
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/node.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/node.go
new file mode 100644
index 0000000..7fd0250
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/node.go
@@ -0,0 +1,1161 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+// TODO: proper error handling
+// TODO: proper logging
+
+import (
+	"context"
+	"fmt"
+	"github.com/golang/protobuf/proto"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+	"strings"
+	"sync"
+	"time"
+)
+
+// When a branch has no transaction id, everything gets stored in NONE
+const (
+	NONE string = "none"
+)
+
+// Node interface is an abstraction of the node data structure
+type Node interface {
+	MakeLatest(branch *Branch, revision Revision, changeAnnouncement []ChangeTuple)
+
+	// CRUD functions
+	Add(ctx context.Context, path string, data interface{}, txid string, makeBranch MakeBranchFunction) Revision
+	Get(ctx context.Context, path string, hash string, depth int, deep bool, txid string) interface{}
+	List(ctx context.Context, path string, hash string, depth int, deep bool, txid string) interface{}
+	Update(ctx context.Context, path string, data interface{}, strict bool, txid string, makeBranch MakeBranchFunction) Revision
+	Remove(ctx context.Context, path string, txid string, makeBranch MakeBranchFunction) Revision
+	CreateProxy(ctx context.Context, path string, exclusive bool) *Proxy
+
+	GetProxy() *Proxy
+
+	MakeBranch(txid string) *Branch
+	DeleteBranch(txid string)
+	MergeBranch(txid string, dryRun bool) (Revision, error)
+
+	MakeTxBranch() string
+	DeleteTxBranch(txid string)
+	FoldTxBranch(txid string)
+}
+
+type node struct {
+	mutex     sync.RWMutex
+	Root      *root
+	Type      interface{}
+	Branches  map[string]*Branch
+	Tags      map[string]Revision
+	Proxy     *Proxy
+	EventBus  *EventBus
+	AutoPrune bool
+}
+
+// ChangeTuple holds details of modifications made to a revision
+type ChangeTuple struct {
+	Type         CallbackType
+	PreviousData interface{}
+	LatestData   interface{}
+}
+
+// NewNode creates a new instance of the node data structure
+func NewNode(root *root, initialData interface{}, autoPrune bool, txid string) *node {
+	n := &node{}
+
+	n.Root = root
+	n.Branches = make(map[string]*Branch)
+	n.Tags = make(map[string]Revision)
+	n.Proxy = nil
+	n.EventBus = nil
+	n.AutoPrune = autoPrune
+
+	if IsProtoMessage(initialData) {
+		n.Type = reflect.ValueOf(initialData).Interface()
+		dataCopy := proto.Clone(initialData.(proto.Message))
+		n.initialize(dataCopy, txid)
+	} else if reflect.ValueOf(initialData).IsValid() {
+		// FIXME: this block does not reflect the original implementation
+		// it should be checking if the provided initial_data is already a type!??!
+		// it should be checked before IsProtoMessage
+		n.Type = reflect.ValueOf(initialData).Interface()
+	} else {
+		// not implemented error
+		log.Errorf("cannot process initial data - %+v", initialData)
+	}
+
+	return n
+}
+
+// MakeNode creates a new node in the tree
+func (n *node) MakeNode(data interface{}, txid string) *node {
+	return NewNode(n.Root, data, true, txid)
+}
+
+// MakeRevision create a new revision of the node in the tree
+func (n *node) MakeRevision(branch *Branch, data interface{}, children map[string][]Revision) Revision {
+	return n.GetRoot().MakeRevision(branch, data, children)
+}
+
+// makeLatest will mark the revision of a node as being the latest
+func (n *node) makeLatest(branch *Branch, revision Revision, changeAnnouncement []ChangeTuple) {
+	// Keep a reference to the current revision
+	var previous string
+	if branch.GetLatest() != nil {
+		previous = branch.GetLatest().GetHash()
+	}
+
+	branch.AddRevision(revision)
+
+	// If anything is new, then set the revision as the latest
+	if branch.GetLatest() == nil || revision.GetHash() != branch.GetLatest().GetHash() {
+		if revision.GetName() != "" {
+			log.Debugw("saving-latest-data", log.Fields{"hash": revision.GetHash(), "data": revision.GetData()})
+			// Tag a timestamp to that revision
+			revision.SetLastUpdate()
+			GetRevCache().Set(revision.GetName(), revision)
+		}
+		branch.SetLatest(revision)
+	}
+
+	// Delete the previous revision if anything has changed
+	if previous != "" && previous != branch.GetLatest().GetHash() {
+		branch.DeleteRevision(previous)
+	}
+
+	if changeAnnouncement != nil && branch.Txid == "" {
+		if n.Proxy != nil {
+			for _, change := range changeAnnouncement {
+				log.Debugw("adding-callback",
+					log.Fields{
+						"callbacks":    n.GetProxy().getCallbacks(change.Type),
+						"type":         change.Type,
+						"previousData": change.PreviousData,
+						"latestData":   change.LatestData,
+					})
+				n.Root.AddCallback(
+					n.GetProxy().InvokeCallbacks,
+					change.Type,
+					true,
+					change.PreviousData,
+					change.LatestData)
+			}
+		}
+	}
+}
+
+// Latest returns the latest revision of node with or without the transaction id
+func (n *node) Latest(txid ...string) Revision {
+	var branch *Branch
+
+	if len(txid) > 0 && txid[0] != "" {
+		if branch = n.GetBranch(txid[0]); branch != nil {
+			return branch.GetLatest()
+		}
+	} else if branch = n.GetBranch(NONE); branch != nil {
+		return branch.GetLatest()
+	}
+	return nil
+}
+
+// initialize prepares the content of a node along with its possible ramifications
+func (n *node) initialize(data interface{}, txid string) {
+	children := make(map[string][]Revision)
+	for fieldName, field := range ChildrenFields(n.Type) {
+		_, fieldValue := GetAttributeValue(data, fieldName, 0)
+
+		if fieldValue.IsValid() {
+			if field.IsContainer {
+				if field.Key != "" {
+					for i := 0; i < fieldValue.Len(); i++ {
+						v := fieldValue.Index(i)
+
+						if rev := n.MakeNode(v.Interface(), txid).Latest(txid); rev != nil {
+							children[fieldName] = append(children[fieldName], rev)
+						}
+
+						// TODO: The following logic was ported from v1.0.  Need to verify if it is required
+						//var keysSeen []string
+						//_, key := GetAttributeValue(v.Interface(), field.Key, 0)
+						//for _, k := range keysSeen {
+						//	if k == key.String() {
+						//		//log.Errorf("duplicate key - %s", k)
+						//	}
+						//}
+						//keysSeen = append(keysSeen, key.String())
+					}
+
+				} else {
+					for i := 0; i < fieldValue.Len(); i++ {
+						v := fieldValue.Index(i)
+						if newNodeRev := n.MakeNode(v.Interface(), txid).Latest(); newNodeRev != nil {
+							children[fieldName] = append(children[fieldName], newNodeRev)
+						}
+					}
+				}
+			} else {
+				if newNodeRev := n.MakeNode(fieldValue.Interface(), txid).Latest(); newNodeRev != nil {
+					children[fieldName] = append(children[fieldName], newNodeRev)
+				}
+			}
+		} else {
+			log.Errorf("field is invalid - %+v", fieldValue)
+		}
+	}
+
+	branch := NewBranch(n, "", nil, n.AutoPrune)
+	rev := n.MakeRevision(branch, data, children)
+	n.makeLatest(branch, rev, nil)
+
+	if txid == "" {
+		n.SetBranch(NONE, branch)
+	} else {
+		n.SetBranch(txid, branch)
+	}
+}
+
+// findRevByKey retrieves a specific revision from a node tree
+func (n *node) findRevByKey(revs []Revision, keyName string, value interface{}) (int, Revision) {
+	for i, rev := range revs {
+		dataValue := reflect.ValueOf(rev.GetData())
+		dataStruct := GetAttributeStructure(rev.GetData(), keyName, 0)
+
+		fieldValue := dataValue.Elem().FieldByName(dataStruct.Name)
+
+		a := fmt.Sprintf("%s", fieldValue.Interface())
+		b := fmt.Sprintf("%s", value)
+		if a == b {
+			return i, revs[i]
+		}
+	}
+
+	return -1, nil
+}
+
+// Get retrieves the data from a node tree that resides at the specified path
+func (n *node) List(ctx context.Context, path string, hash string, depth int, deep bool, txid string) interface{} {
+	n.mutex.Lock()
+	defer n.mutex.Unlock()
+
+	log.Debugw("node-list-request", log.Fields{"path": path, "hash": hash, "depth": depth, "deep": deep, "txid": txid})
+	if deep {
+		depth = -1
+	}
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+
+	var branch *Branch
+	var rev Revision
+
+	if branch = n.GetBranch(txid); txid == "" || branch == nil {
+		branch = n.GetBranch(NONE)
+	}
+
+	if hash != "" {
+		rev = branch.GetRevision(hash)
+	} else {
+		rev = branch.GetLatest()
+	}
+
+	var result interface{}
+	var prList []interface{}
+	if pr := rev.LoadFromPersistence(ctx, path, txid, nil); pr != nil {
+		for _, revEntry := range pr {
+			prList = append(prList, revEntry.GetData())
+		}
+		result = prList
+	}
+
+	return result
+}
+
+// Get retrieves the data from a node tree that resides at the specified path
+func (n *node) Get(ctx context.Context, path string, hash string, depth int, reconcile bool, txid string) interface{} {
+	n.mutex.Lock()
+	defer n.mutex.Unlock()
+
+	log.Debugw("node-get-request", log.Fields{"path": path, "hash": hash, "depth": depth, "reconcile": reconcile, "txid": txid})
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+
+	var branch *Branch
+	var rev Revision
+
+	if branch = n.GetBranch(txid); txid == "" || branch == nil {
+		branch = n.GetBranch(NONE)
+	}
+
+	if hash != "" {
+		rev = branch.GetRevision(hash)
+	} else {
+		rev = branch.GetLatest()
+	}
+
+	var result interface{}
+
+	// If there is no request to reconcile, try to get it from memory
+	if !reconcile {
+		// Try to find an entry matching the path value from one of these sources
+		// 1.  Start with the cache which stores revisions by watch names
+		// 2.  Then look in the revision tree, especially if it's a sub-path such as /devices/1234/flows
+		// 3.  Move on to the KV store if that path cannot be found or if the entry has expired
+		if entry, exists := GetRevCache().Get(path); exists && entry.(Revision) != nil {
+			entryAge := time.Now().Sub(entry.(Revision).GetLastUpdate()).Nanoseconds() / int64(time.Millisecond)
+			if entryAge < DataRefreshPeriod {
+				log.Debugw("using-cache-entry", log.Fields{
+					"path": path,
+					"hash": hash,
+					"age":  entryAge,
+				})
+				return proto.Clone(entry.(Revision).GetData().(proto.Message))
+			} else {
+				log.Debugw("cache-entry-expired", log.Fields{"path": path, "hash": hash, "age": entryAge})
+			}
+		} else if result = n.getPath(ctx, rev.GetBranch().GetLatest(), path, depth); result != nil && reflect.ValueOf(result).IsValid() && !reflect.ValueOf(result).IsNil() {
+			log.Debugw("using-rev-tree-entry", log.Fields{"path": path, "hash": hash, "depth": depth, "reconcile": reconcile, "txid": txid})
+			return result
+		} else {
+			log.Debugw("not-using-cache-entry", log.Fields{
+				"path": path,
+				"hash": hash, "depth": depth,
+				"reconcile": reconcile,
+				"txid":      txid,
+			})
+		}
+	} else {
+		log.Debugw("reconcile-requested", log.Fields{
+			"path":      path,
+			"hash":      hash,
+			"reconcile": reconcile,
+		})
+	}
+
+	// If we got to this point, we are either trying to reconcile with the db
+	// or we simply failed at getting information from memory
+	if n.Root.KvStore != nil {
+		if pr := rev.LoadFromPersistence(ctx, path, txid, nil); pr != nil && len(pr) > 0 {
+			// Did we receive a single or multiple revisions?
+			if len(pr) > 1 {
+				var revs []interface{}
+				for _, revEntry := range pr {
+					revs = append(revs, revEntry.GetData())
+				}
+				result = revs
+			} else {
+				result = pr[0].GetData()
+			}
+		}
+	}
+
+	return result
+}
+
+//getPath traverses the specified path and retrieves the data associated to it
+func (n *node) getPath(ctx context.Context, rev Revision, path string, depth int) interface{} {
+	if path == "" {
+		return n.getData(rev, depth)
+	}
+
+	partition := strings.SplitN(path, "/", 2)
+	name := partition[0]
+
+	if len(partition) < 2 {
+		path = ""
+	} else {
+		path = partition[1]
+	}
+
+	names := ChildrenFields(n.Type)
+	field := names[name]
+
+	if field != nil && field.IsContainer {
+		children := make([]Revision, len(rev.GetChildren(name)))
+		copy(children, rev.GetChildren(name))
+
+		if field.Key != "" {
+			if path != "" {
+				partition = strings.SplitN(path, "/", 2)
+				key := partition[0]
+				path = ""
+				keyValue := field.KeyFromStr(key)
+				if _, childRev := n.findRevByKey(children, field.Key, keyValue); childRev == nil {
+					return nil
+				} else {
+					childNode := childRev.GetNode()
+					return childNode.getPath(ctx, childRev, path, depth)
+				}
+			} else {
+				var response []interface{}
+				for _, childRev := range children {
+					childNode := childRev.GetNode()
+					value := childNode.getData(childRev, depth)
+					response = append(response, value)
+				}
+				return response
+			}
+		} else {
+			var response []interface{}
+			if path != "" {
+				// TODO: raise error
+				return response
+			}
+			for _, childRev := range children {
+				childNode := childRev.GetNode()
+				value := childNode.getData(childRev, depth)
+				response = append(response, value)
+			}
+			return response
+		}
+	} else if children := rev.GetChildren(name); children != nil && len(children) > 0 {
+		childRev := children[0]
+		childNode := childRev.GetNode()
+		return childNode.getPath(ctx, childRev, path, depth)
+	}
+
+	return nil
+}
+
+// getData retrieves the data from a node revision
+func (n *node) getData(rev Revision, depth int) interface{} {
+	msg := rev.GetBranch().GetLatest().Get(depth)
+	var modifiedMsg interface{}
+
+	if n.GetProxy() != nil {
+		log.Debugw("invoking-get-callbacks", log.Fields{"data": msg})
+		if modifiedMsg = n.GetProxy().InvokeCallbacks(GET, false, msg); modifiedMsg != nil {
+			msg = modifiedMsg
+		}
+
+	}
+
+	return msg
+}
+
+// Update changes the content of a node at the specified path with the provided data
+func (n *node) Update(ctx context.Context, path string, data interface{}, strict bool, txid string, makeBranch MakeBranchFunction) Revision {
+	n.mutex.Lock()
+	defer n.mutex.Unlock()
+
+	log.Debugw("node-update-request", log.Fields{"path": path, "strict": strict, "txid": txid})
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+
+	var branch *Branch
+	if txid == "" {
+		branch = n.GetBranch(NONE)
+	} else if branch = n.GetBranch(txid); branch == nil {
+		branch = makeBranch(n)
+	}
+
+	if branch.GetLatest() != nil {
+		log.Debugf("Branch data : %+v, Passed data: %+v", branch.GetLatest().GetData(), data)
+	}
+	if path == "" {
+		return n.doUpdate(ctx, branch, data, strict)
+	}
+
+	rev := branch.GetLatest()
+
+	partition := strings.SplitN(path, "/", 2)
+	name := partition[0]
+
+	if len(partition) < 2 {
+		path = ""
+	} else {
+		path = partition[1]
+	}
+
+	field := ChildrenFields(n.Type)[name]
+	var children []Revision
+
+	if field == nil {
+		return n.doUpdate(ctx, branch, data, strict)
+	}
+
+	if field.IsContainer {
+		if path == "" {
+			log.Errorf("cannot update a list")
+		} else if field.Key != "" {
+			partition := strings.SplitN(path, "/", 2)
+			key := partition[0]
+			if len(partition) < 2 {
+				path = ""
+			} else {
+				path = partition[1]
+			}
+			keyValue := field.KeyFromStr(key)
+
+			children = make([]Revision, len(rev.GetChildren(name)))
+			copy(children, rev.GetChildren(name))
+
+			idx, childRev := n.findRevByKey(children, field.Key, keyValue)
+
+			if childRev == nil {
+				log.Debugw("child-revision-is-nil", log.Fields{"key": keyValue})
+				return branch.GetLatest()
+			}
+
+			childNode := childRev.GetNode()
+
+			// Save proxy in child node to ensure callbacks are called later on
+			// only assign in cases of non sub-folder proxies, i.e. "/"
+			if childNode.Proxy == nil && n.Proxy != nil && n.GetProxy().getFullPath() == "" {
+				childNode.Proxy = n.Proxy
+			}
+
+			newChildRev := childNode.Update(ctx, path, data, strict, txid, makeBranch)
+
+			if newChildRev.GetHash() == childRev.GetHash() {
+				if newChildRev != childRev {
+					log.Debug("clear-hash - %s %+v", newChildRev.GetHash(), newChildRev)
+					newChildRev.ClearHash()
+				}
+				log.Debugw("child-revisions-have-matching-hash", log.Fields{"hash": childRev.GetHash(), "key": keyValue})
+				return branch.GetLatest()
+			}
+
+			_, newKey := GetAttributeValue(newChildRev.GetData(), field.Key, 0)
+
+			_newKeyType := fmt.Sprintf("%s", newKey)
+			_keyValueType := fmt.Sprintf("%s", keyValue)
+
+			if _newKeyType != _keyValueType {
+				log.Errorf("cannot change key field")
+			}
+
+			// Prefix the hash value with the data type (e.g. devices, logical_devices, adapters)
+			newChildRev.SetName(name + "/" + _keyValueType)
+
+			branch.LatestLock.Lock()
+			defer branch.LatestLock.Unlock()
+
+			if idx >= 0 {
+				children[idx] = newChildRev
+			} else {
+				children = append(children, newChildRev)
+			}
+
+			updatedRev := rev.UpdateChildren(ctx, name, children, branch)
+
+			n.makeLatest(branch, updatedRev, nil)
+			updatedRev.ChildDrop(name, childRev.GetHash())
+
+			return newChildRev
+
+		} else {
+			log.Errorf("cannot index into container with no keys")
+		}
+	} else {
+		childRev := rev.GetChildren(name)[0]
+		childNode := childRev.GetNode()
+		newChildRev := childNode.Update(ctx, path, data, strict, txid, makeBranch)
+
+		branch.LatestLock.Lock()
+		defer branch.LatestLock.Unlock()
+
+		updatedRev := rev.UpdateChildren(ctx, name, []Revision{newChildRev}, branch)
+		n.makeLatest(branch, updatedRev, nil)
+
+		updatedRev.ChildDrop(name, childRev.GetHash())
+
+		return newChildRev
+	}
+
+	return nil
+}
+
+func (n *node) doUpdate(ctx context.Context, branch *Branch, data interface{}, strict bool) Revision {
+	log.Debugw("comparing-types", log.Fields{"expected": reflect.ValueOf(n.Type).Type(), "actual": reflect.TypeOf(data)})
+
+	if reflect.TypeOf(data) != reflect.ValueOf(n.Type).Type() {
+		// TODO raise error
+		log.Errorw("types-do-not-match: %+v", log.Fields{"actual": reflect.TypeOf(data), "expected": n.Type})
+		return nil
+	}
+
+	// TODO: validate that this actually works
+	//if n.hasChildren(data) {
+	//	return nil
+	//}
+
+	if n.GetProxy() != nil {
+		log.Debug("invoking proxy PRE_UPDATE Callbacks")
+		n.GetProxy().InvokeCallbacks(PRE_UPDATE, false, branch.GetLatest(), data)
+	}
+
+	if branch.GetLatest().GetData().(proto.Message).String() != data.(proto.Message).String() {
+		if strict {
+			// TODO: checkAccessViolations(data, Branch.GetLatest.data)
+			log.Debugf("checking access violations")
+		}
+
+		rev := branch.GetLatest().UpdateData(ctx, data, branch)
+		changes := []ChangeTuple{{POST_UPDATE, branch.GetLatest().GetData(), rev.GetData()}}
+		n.makeLatest(branch, rev, changes)
+
+		return rev
+	}
+	return branch.GetLatest()
+}
+
+// Add inserts a new node at the specified path with the provided data
+func (n *node) Add(ctx context.Context, path string, data interface{}, txid string, makeBranch MakeBranchFunction) Revision {
+	n.mutex.Lock()
+	defer n.mutex.Unlock()
+
+	log.Debugw("node-add-request", log.Fields{"path": path, "txid": txid})
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+	if path == "" {
+		// TODO raise error
+		log.Errorf("cannot add for non-container mode")
+		return nil
+	}
+
+	var branch *Branch
+	if txid == "" {
+		branch = n.GetBranch(NONE)
+	} else if branch = n.GetBranch(txid); branch == nil {
+		branch = makeBranch(n)
+	}
+
+	rev := branch.GetLatest()
+
+	partition := strings.SplitN(path, "/", 2)
+	name := partition[0]
+
+	if len(partition) < 2 {
+		path = ""
+	} else {
+		path = partition[1]
+	}
+
+	field := ChildrenFields(n.Type)[name]
+
+	var children []Revision
+
+	if field.IsContainer {
+		if path == "" {
+			if field.Key != "" {
+				if n.GetProxy() != nil {
+					log.Debug("invoking proxy PRE_ADD Callbacks")
+					n.GetProxy().InvokeCallbacks(PRE_ADD, false, data)
+				}
+
+				children = make([]Revision, len(rev.GetChildren(name)))
+				copy(children, rev.GetChildren(name))
+
+				_, key := GetAttributeValue(data, field.Key, 0)
+
+				if _, exists := n.findRevByKey(children, field.Key, key.String()); exists != nil {
+					// TODO raise error
+					log.Warnw("duplicate-key-found", log.Fields{"key": key.String()})
+					return exists
+				}
+				childRev := n.MakeNode(data, "").Latest()
+
+				// Prefix the hash with the data type (e.g. devices, logical_devices, adapters)
+				childRev.SetName(name + "/" + key.String())
+
+				branch.LatestLock.Lock()
+				defer branch.LatestLock.Unlock()
+
+				children = append(children, childRev)
+
+				updatedRev := rev.UpdateChildren(ctx, name, children, branch)
+				changes := []ChangeTuple{{POST_ADD, nil, childRev.GetData()}}
+				childRev.SetupWatch(childRev.GetName())
+
+				n.makeLatest(branch, updatedRev, changes)
+
+				return childRev
+			}
+			log.Errorf("cannot add to non-keyed container")
+
+		} else if field.Key != "" {
+			partition := strings.SplitN(path, "/", 2)
+			key := partition[0]
+			if len(partition) < 2 {
+				path = ""
+			} else {
+				path = partition[1]
+			}
+			keyValue := field.KeyFromStr(key)
+
+			children = make([]Revision, len(rev.GetChildren(name)))
+			copy(children, rev.GetChildren(name))
+
+			idx, childRev := n.findRevByKey(children, field.Key, keyValue)
+
+			if childRev == nil {
+				return branch.GetLatest()
+			}
+
+			childNode := childRev.GetNode()
+			newChildRev := childNode.Add(ctx, path, data, txid, makeBranch)
+
+			// Prefix the hash with the data type (e.g. devices, logical_devices, adapters)
+			newChildRev.SetName(name + "/" + keyValue.(string))
+
+			branch.LatestLock.Lock()
+			defer branch.LatestLock.Unlock()
+
+			if idx >= 0 {
+				children[idx] = newChildRev
+			} else {
+				children = append(children, newChildRev)
+			}
+
+			updatedRev := rev.UpdateChildren(ctx, name, children, branch)
+			n.makeLatest(branch, updatedRev, nil)
+
+			updatedRev.ChildDrop(name, childRev.GetHash())
+
+			return newChildRev
+		} else {
+			log.Errorf("cannot add to non-keyed container")
+		}
+	} else {
+		log.Errorf("cannot add to non-container field")
+	}
+
+	return nil
+}
+
+// Remove eliminates a node at the specified path
+func (n *node) Remove(ctx context.Context, path string, txid string, makeBranch MakeBranchFunction) Revision {
+	n.mutex.Lock()
+	defer n.mutex.Unlock()
+
+	log.Debugw("node-remove-request", log.Fields{"path": path, "txid": txid, "makeBranch": makeBranch})
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+	if path == "" {
+		// TODO raise error
+		log.Errorf("cannot remove for non-container mode")
+	}
+	var branch *Branch
+	if txid == "" {
+		branch = n.GetBranch(NONE)
+	} else if branch = n.GetBranch(txid); branch == nil {
+		branch = makeBranch(n)
+	}
+
+	rev := branch.GetLatest()
+
+	partition := strings.SplitN(path, "/", 2)
+	name := partition[0]
+	if len(partition) < 2 {
+		path = ""
+	} else {
+		path = partition[1]
+	}
+
+	field := ChildrenFields(n.Type)[name]
+	var children []Revision
+	postAnnouncement := []ChangeTuple{}
+
+	if field.IsContainer {
+		if path == "" {
+			log.Errorw("cannot-remove-without-key", log.Fields{"name": name, "key": path})
+		} else if field.Key != "" {
+			partition := strings.SplitN(path, "/", 2)
+			key := partition[0]
+			if len(partition) < 2 {
+				path = ""
+			} else {
+				path = partition[1]
+			}
+
+			keyValue := field.KeyFromStr(key)
+			children = make([]Revision, len(rev.GetChildren(name)))
+			copy(children, rev.GetChildren(name))
+
+			if path != "" {
+				if idx, childRev := n.findRevByKey(children, field.Key, keyValue); childRev != nil {
+					childNode := childRev.GetNode()
+					if childNode.Proxy == nil {
+						childNode.Proxy = n.Proxy
+					}
+					newChildRev := childNode.Remove(ctx, path, txid, makeBranch)
+
+					branch.LatestLock.Lock()
+					defer branch.LatestLock.Unlock()
+
+					if idx >= 0 {
+						children[idx] = newChildRev
+					} else {
+						children = append(children, newChildRev)
+					}
+
+					rev.SetChildren(name, children)
+					branch.GetLatest().Drop(txid, false)
+					n.makeLatest(branch, rev, nil)
+				}
+				return branch.GetLatest()
+			}
+
+			if idx, childRev := n.findRevByKey(children, field.Key, keyValue); childRev != nil && idx >= 0 {
+				if n.GetProxy() != nil {
+					data := childRev.GetData()
+					n.GetProxy().InvokeCallbacks(PRE_REMOVE, false, data)
+					postAnnouncement = append(postAnnouncement, ChangeTuple{POST_REMOVE, data, nil})
+				} else {
+					postAnnouncement = append(postAnnouncement, ChangeTuple{POST_REMOVE, childRev.GetData(), nil})
+				}
+
+				childRev.StorageDrop(txid, true)
+				GetRevCache().Delete(childRev.GetName())
+
+				branch.LatestLock.Lock()
+				defer branch.LatestLock.Unlock()
+
+				children = append(children[:idx], children[idx+1:]...)
+				rev.SetChildren(name, children)
+
+				branch.GetLatest().Drop(txid, false)
+				n.makeLatest(branch, rev, postAnnouncement)
+
+				return rev
+			} else {
+				log.Errorw("failed-to-find-revision", log.Fields{"name": name, "key": keyValue.(string)})
+			}
+		}
+		log.Errorw("cannot-add-to-non-keyed-container", log.Fields{"name": name, "path": path, "fieldKey": field.Key})
+
+	} else {
+		log.Errorw("cannot-add-to-non-container-field", log.Fields{"name": name, "path": path})
+	}
+
+	return nil
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Branching ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// MakeBranchFunction is a type for function references intented to create a branch
+type MakeBranchFunction func(*node) *Branch
+
+// MakeBranch creates a new branch for the provided transaction id
+func (n *node) MakeBranch(txid string) *Branch {
+	branchPoint := n.GetBranch(NONE).GetLatest()
+	branch := NewBranch(n, txid, branchPoint, true)
+	n.SetBranch(txid, branch)
+	return branch
+}
+
+// DeleteBranch removes a branch with the specified id
+func (n *node) DeleteBranch(txid string) {
+	delete(n.Branches, txid)
+}
+
+func (n *node) mergeChild(txid string, dryRun bool) func(Revision) Revision {
+	f := func(rev Revision) Revision {
+		childBranch := rev.GetBranch()
+
+		if childBranch.Txid == txid {
+			rev, _ = childBranch.Node.MergeBranch(txid, dryRun)
+		}
+
+		return rev
+	}
+	return f
+}
+
+// MergeBranch will integrate the contents of a transaction branch within the latest branch of a given node
+func (n *node) MergeBranch(txid string, dryRun bool) (Revision, error) {
+	srcBranch := n.GetBranch(txid)
+	dstBranch := n.GetBranch(NONE)
+
+	forkRev := srcBranch.Origin
+	srcRev := srcBranch.GetLatest()
+	dstRev := dstBranch.GetLatest()
+
+	rev, changes := Merge3Way(forkRev, srcRev, dstRev, n.mergeChild(txid, dryRun), dryRun)
+
+	if !dryRun {
+		if rev != nil {
+			rev.SetName(dstRev.GetName())
+			n.makeLatest(dstBranch, rev, changes)
+		}
+		n.DeleteBranch(txid)
+	}
+
+	// TODO: return proper error when one occurs
+	return rev, nil
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Diff utility ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+//func (n *node) diff(hash1, hash2, txid string) {
+//	branch := n.Branches[txid]
+//	rev1 := branch.GetHash(hash1)
+//	rev2 := branch.GetHash(hash2)
+//
+//	if rev1.GetHash() == rev2.GetHash() {
+//		// empty patch
+//	} else {
+//		// translate data to json and generate patch
+//		patch, err := jsonpatch.MakePatch(rev1.GetData(), rev2.GetData())
+//		patch.
+//	}
+//}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Tag utility ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// TODO: is tag mgmt used in the python implementation? Need to validate
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Internals ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+func (n *node) hasChildren(data interface{}) bool {
+	for fieldName, field := range ChildrenFields(n.Type) {
+		_, fieldValue := GetAttributeValue(data, fieldName, 0)
+
+		if (field.IsContainer && fieldValue.Len() > 0) || !fieldValue.IsNil() {
+			log.Error("cannot update external children")
+			return true
+		}
+	}
+
+	return false
+}
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ node Proxy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+// CreateProxy returns a reference to a sub-tree of the data model
+func (n *node) CreateProxy(ctx context.Context, path string, exclusive bool) *Proxy {
+	return n.createProxy(ctx, path, path, n, exclusive)
+}
+
+func (n *node) createProxy(ctx context.Context, path string, fullPath string, parentNode *node, exclusive bool) *Proxy {
+	log.Debugw("node-create-proxy", log.Fields{
+		"node-type":        reflect.ValueOf(n.Type).Type(),
+		"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+		"path":             path,
+		"fullPath":         fullPath,
+	})
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+	if path == "" {
+		return n.makeProxy(path, fullPath, parentNode, exclusive)
+	}
+
+	rev := n.GetBranch(NONE).GetLatest()
+	partition := strings.SplitN(path, "/", 2)
+	name := partition[0]
+	var nodeType interface{}
+	if len(partition) < 2 {
+		path = ""
+		nodeType = n.Type
+	} else {
+		path = partition[1]
+		nodeType = parentNode.Type
+	}
+
+	field := ChildrenFields(nodeType)[name]
+
+	if field != nil {
+		if field.IsContainer {
+			log.Debugw("container-field", log.Fields{
+				"node-type":        reflect.ValueOf(n.Type).Type(),
+				"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+				"path":             path,
+				"name":             name,
+			})
+			if path == "" {
+				log.Debugw("folder-proxy", log.Fields{
+					"node-type":        reflect.ValueOf(n.Type).Type(),
+					"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+					"fullPath":         fullPath,
+					"name":             name,
+				})
+				newNode := n.MakeNode(reflect.New(field.ClassType.Elem()).Interface(), "")
+				return newNode.makeProxy(path, fullPath, parentNode, exclusive)
+			} else if field.Key != "" {
+				log.Debugw("key-proxy", log.Fields{
+					"node-type":        reflect.ValueOf(n.Type).Type(),
+					"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+					"fullPath":         fullPath,
+					"name":             name,
+				})
+				partition := strings.SplitN(path, "/", 2)
+				key := partition[0]
+				if len(partition) < 2 {
+					path = ""
+				} else {
+					path = partition[1]
+				}
+				keyValue := field.KeyFromStr(key)
+				var children []Revision
+				children = make([]Revision, len(rev.GetChildren(name)))
+				copy(children, rev.GetChildren(name))
+
+				var childRev Revision
+				if _, childRev = n.findRevByKey(children, field.Key, keyValue); childRev != nil {
+					log.Debugw("found-revision-matching-key-in-memory", log.Fields{
+						"node-type":        reflect.ValueOf(n.Type).Type(),
+						"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+						"fullPath":         fullPath,
+						"name":             name,
+					})
+				} else if revs := n.GetBranch(NONE).GetLatest().LoadFromPersistence(ctx, fullPath, "", nil); revs != nil && len(revs) > 0 {
+					log.Debugw("found-revision-matching-key-in-db", log.Fields{
+						"node-type":        reflect.ValueOf(n.Type).Type(),
+						"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+						"fullPath":         fullPath,
+						"name":             name,
+					})
+					childRev = revs[0]
+				} else {
+					log.Debugw("no-revision-matching-key", log.Fields{
+						"node-type":        reflect.ValueOf(n.Type).Type(),
+						"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+						"fullPath":         fullPath,
+						"name":             name,
+					})
+				}
+				if childRev != nil {
+					childNode := childRev.GetNode()
+					return childNode.createProxy(ctx, path, fullPath, n, exclusive)
+				}
+			} else {
+				log.Errorw("cannot-access-index-of-empty-container", log.Fields{
+					"node-type":        reflect.ValueOf(n.Type).Type(),
+					"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+					"path":             path,
+					"name":             name,
+				})
+			}
+		} else {
+			log.Debugw("non-container-field", log.Fields{
+				"node-type":        reflect.ValueOf(n.Type).Type(),
+				"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+				"path":             path,
+				"name":             name,
+			})
+			childRev := rev.GetChildren(name)[0]
+			childNode := childRev.GetNode()
+			return childNode.createProxy(ctx, path, fullPath, n, exclusive)
+		}
+	} else {
+		log.Debugw("field-object-is-nil", log.Fields{
+			"node-type":        reflect.ValueOf(n.Type).Type(),
+			"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+			"fullPath":         fullPath,
+			"name":             name,
+		})
+	}
+
+	log.Warnw("cannot-create-proxy", log.Fields{
+		"node-type":        reflect.ValueOf(n.Type).Type(),
+		"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+		"path":             path,
+		"fullPath":         fullPath,
+		"latest-rev":       rev.GetHash(),
+	})
+	return nil
+}
+
+func (n *node) makeProxy(path string, fullPath string, parentNode *node, exclusive bool) *Proxy {
+	log.Debugw("node-make-proxy", log.Fields{
+		"node-type":        reflect.ValueOf(n.Type).Type(),
+		"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+		"path":             path,
+		"fullPath":         fullPath,
+	})
+
+	r := &root{
+		node:                  n,
+		Callbacks:             n.Root.GetCallbacks(),
+		NotificationCallbacks: n.Root.GetNotificationCallbacks(),
+		DirtyNodes:            n.Root.DirtyNodes,
+		KvStore:               n.Root.KvStore,
+		Loading:               n.Root.Loading,
+		RevisionClass:         n.Root.RevisionClass,
+	}
+
+	if n.Proxy == nil {
+		log.Debugw("constructing-new-proxy", log.Fields{
+			"node-type":        reflect.ValueOf(n.Type).Type(),
+			"parent-node-type": reflect.ValueOf(parentNode.Type).Type(),
+			"path":             path,
+			"fullPath":         fullPath,
+		})
+		n.Proxy = NewProxy(r, n, parentNode, path, fullPath, exclusive)
+	} else {
+		log.Debugw("node-has-existing-proxy", log.Fields{
+			"node-type":        reflect.ValueOf(n.GetProxy().Node.Type).Type(),
+			"parent-node-type": reflect.ValueOf(n.GetProxy().ParentNode.Type).Type(),
+			"path":             n.GetProxy().Path,
+			"fullPath":         n.GetProxy().FullPath,
+		})
+		if n.GetProxy().Exclusive {
+			log.Error("node is already owned exclusively")
+		}
+	}
+
+	return n.Proxy
+}
+
+func (n *node) makeEventBus() *EventBus {
+	if n.EventBus == nil {
+		n.EventBus = NewEventBus()
+	}
+	return n.EventBus
+}
+
+func (n *node) SetProxy(proxy *Proxy) {
+	n.Proxy = proxy
+}
+
+func (n *node) GetProxy() *Proxy {
+	return n.Proxy
+}
+
+func (n *node) GetBranch(key string) *Branch {
+	if n.Branches != nil {
+		if branch, exists := n.Branches[key]; exists {
+			return branch
+		}
+	}
+	return nil
+}
+
+func (n *node) SetBranch(key string, branch *Branch) {
+	n.Branches[key] = branch
+}
+
+func (n *node) GetRoot() *root {
+	return n.Root
+}
+func (n *node) SetRoot(root *root) {
+	n.Root = root
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/non_persisted_revision.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/non_persisted_revision.go
new file mode 100644
index 0000000..88320cb
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/non_persisted_revision.go
@@ -0,0 +1,497 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package model
+
+import (
+	"bytes"
+	"context"
+	"crypto/md5"
+	"fmt"
+	"github.com/golang/protobuf/proto"
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+	"sort"
+	"sync"
+	"time"
+)
+
+// TODO: Cache logic will have to be revisited to cleanup unused entries in memory (disabled for now)
+//
+type revCacheSingleton struct {
+	sync.RWMutex
+	Cache sync.Map
+}
+
+func (s *revCacheSingleton) Get(path string) (interface{}, bool) {
+	return s.Cache.Load(path)
+}
+func (s *revCacheSingleton) Set(path string, value interface{}) {
+	s.Cache.Store(path, value)
+}
+func (s *revCacheSingleton) Delete(path string) {
+	s.Cache.Delete(path)
+}
+
+var revCacheInstance *revCacheSingleton
+var revCacheOnce sync.Once
+
+func GetRevCache() *revCacheSingleton {
+	revCacheOnce.Do(func() {
+		revCacheInstance = &revCacheSingleton{Cache: sync.Map{}}
+	})
+	return revCacheInstance
+}
+
+type NonPersistedRevision struct {
+	mutex        sync.RWMutex
+	Root         *root
+	Config       *DataRevision
+	childrenLock sync.RWMutex
+	Children     map[string][]Revision
+	Hash         string
+	Branch       *Branch
+	WeakRef      string
+	Name         string
+	lastUpdate   time.Time
+}
+
+func NewNonPersistedRevision(root *root, branch *Branch, data interface{}, children map[string][]Revision) Revision {
+	r := &NonPersistedRevision{}
+	r.Root = root
+	r.Branch = branch
+	r.Config = NewDataRevision(root, data)
+	r.Children = children
+	r.Hash = r.hashContent()
+	return r
+}
+
+func (npr *NonPersistedRevision) SetConfig(config *DataRevision) {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	npr.Config = config
+}
+
+func (npr *NonPersistedRevision) GetConfig() *DataRevision {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	return npr.Config
+}
+
+func (npr *NonPersistedRevision) SetAllChildren(children map[string][]Revision) {
+	npr.childrenLock.Lock()
+	defer npr.childrenLock.Unlock()
+	npr.Children = make(map[string][]Revision)
+
+	for key, value := range children {
+		npr.Children[key] = make([]Revision, len(value))
+		copy(npr.Children[key], value)
+	}
+}
+
+func (npr *NonPersistedRevision) SetChildren(name string, children []Revision) {
+	npr.childrenLock.Lock()
+	defer npr.childrenLock.Unlock()
+
+	npr.Children[name] = make([]Revision, len(children))
+	copy(npr.Children[name], children)
+}
+
+func (npr *NonPersistedRevision) GetAllChildren() map[string][]Revision {
+	npr.childrenLock.Lock()
+	defer npr.childrenLock.Unlock()
+
+	return npr.Children
+}
+
+func (npr *NonPersistedRevision) GetChildren(name string) []Revision {
+	npr.childrenLock.Lock()
+	defer npr.childrenLock.Unlock()
+
+	if _, exists := npr.Children[name]; exists {
+		return npr.Children[name]
+	}
+	return nil
+}
+
+func (npr *NonPersistedRevision) SetHash(hash string) {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	npr.Hash = hash
+}
+
+func (npr *NonPersistedRevision) GetHash() string {
+	//npr.mutex.Lock()
+	//defer npr.mutex.Unlock()
+	return npr.Hash
+}
+
+func (npr *NonPersistedRevision) ClearHash() {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	npr.Hash = ""
+}
+
+func (npr *NonPersistedRevision) GetName() string {
+	//npr.mutex.Lock()
+	//defer npr.mutex.Unlock()
+	return npr.Name
+}
+
+func (npr *NonPersistedRevision) SetName(name string) {
+	//npr.mutex.Lock()
+	//defer npr.mutex.Unlock()
+	npr.Name = name
+}
+func (npr *NonPersistedRevision) SetBranch(branch *Branch) {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	npr.Branch = branch
+}
+
+func (npr *NonPersistedRevision) GetBranch() *Branch {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	return npr.Branch
+}
+
+func (npr *NonPersistedRevision) GetData() interface{} {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	if npr.Config == nil {
+		return nil
+	}
+	return npr.Config.Data
+}
+
+func (npr *NonPersistedRevision) GetNode() *node {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+	return npr.Branch.Node
+}
+
+func (npr *NonPersistedRevision) Finalize(skipOnExist bool) {
+	npr.Hash = npr.hashContent()
+}
+
+// hashContent generates a hash string based on the contents of the revision.
+// The string should be unique to avoid conflicts with other revisions
+func (npr *NonPersistedRevision) hashContent() string {
+	var buffer bytes.Buffer
+	var childrenKeys []string
+
+	if npr.Config != nil {
+		buffer.WriteString(npr.Config.Hash)
+	}
+
+	if npr.Name != "" {
+		buffer.WriteString(npr.Name)
+	}
+
+	for key := range npr.Children {
+		childrenKeys = append(childrenKeys, key)
+	}
+
+	sort.Strings(childrenKeys)
+
+	if len(npr.Children) > 0 {
+		// Loop through sorted Children keys
+		for _, key := range childrenKeys {
+			for _, child := range npr.Children[key] {
+				if child != nil && child.GetHash() != "" {
+					buffer.WriteString(child.GetHash())
+				}
+			}
+		}
+	}
+
+	return fmt.Sprintf("%x", md5.Sum(buffer.Bytes()))[:12]
+}
+
+// Get will retrieve the data for the current revision
+func (npr *NonPersistedRevision) Get(depth int) interface{} {
+	// 1. Clone the data to avoid any concurrent access issues
+	// 2. The current rev might still be pointing to an old config
+	//    thus, force the revision to get its latest value
+	latestRev := npr.GetBranch().GetLatest()
+	originalData := proto.Clone(latestRev.GetData().(proto.Message))
+	data := originalData
+
+	if depth != 0 {
+		// FIXME: Traversing the struct through reflection sometimes corrupts the data.
+		// Unlike the original python implementation, golang structs are not lazy loaded.
+		// Keeping this non-critical logic for now, but Get operations should be forced to
+		// depth=0 to avoid going through the following loop.
+		for fieldName, field := range ChildrenFields(latestRev.GetData()) {
+			childDataName, childDataHolder := GetAttributeValue(data, fieldName, 0)
+			if field.IsContainer {
+				for _, rev := range latestRev.GetChildren(fieldName) {
+					childData := rev.Get(depth - 1)
+					foundEntry := false
+					for i := 0; i < childDataHolder.Len(); i++ {
+						cdh_if := childDataHolder.Index(i).Interface()
+						if cdh_if.(proto.Message).String() == childData.(proto.Message).String() {
+							foundEntry = true
+							break
+						}
+					}
+					if !foundEntry {
+						// avoid duplicates by adding it only if the child was not found in the holder
+						childDataHolder = reflect.Append(childDataHolder, reflect.ValueOf(childData))
+					}
+				}
+			} else {
+				if revs := npr.GetBranch().GetLatest().GetChildren(fieldName); revs != nil && len(revs) > 0 {
+					rev := revs[0]
+					if rev != nil {
+						childData := rev.Get(depth - 1)
+						if reflect.TypeOf(childData) == reflect.TypeOf(childDataHolder.Interface()) {
+							childDataHolder = reflect.ValueOf(childData)
+						}
+					}
+				}
+			}
+			// Merge child data with cloned object
+			reflect.ValueOf(data).Elem().FieldByName(childDataName).Set(childDataHolder)
+		}
+	}
+
+	result := data
+
+	if result != nil {
+		// We need to send back a copy of the retrieved object
+		result = proto.Clone(data.(proto.Message))
+	}
+
+	return result
+}
+
+// UpdateData will refresh the data content of the revision
+func (npr *NonPersistedRevision) UpdateData(ctx context.Context, data interface{}, branch *Branch) Revision {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+
+	if ctx != nil {
+		if ctxTS, ok := ctx.Value(RequestTimestamp).(int64); ok && npr.lastUpdate.UnixNano() > ctxTS {
+			log.Warnw("data-is-older-than-current", log.Fields{"ctx-ts": ctxTS, "rev-ts": npr.lastUpdate.UnixNano()})
+			return npr
+		}
+	}
+
+	// Do not update the revision if data is the same
+	if npr.Config.Data != nil && npr.Config.hashData(npr.Root, data) == npr.Config.Hash {
+		log.Debugw("stored-data-matches-latest", log.Fields{"stored": npr.Config.Data, "provided": data})
+		return npr
+	}
+
+	// Construct a new revision based on the current one
+	newRev := NonPersistedRevision{}
+	newRev.Config = NewDataRevision(npr.Root, data)
+	newRev.Hash = npr.Hash
+	newRev.Root = npr.Root
+	newRev.Name = npr.Name
+	newRev.Branch = branch
+	newRev.lastUpdate = npr.lastUpdate
+
+	newRev.Children = make(map[string][]Revision)
+	for entryName, childrenEntry := range branch.GetLatest().GetAllChildren() {
+		newRev.Children[entryName] = append(newRev.Children[entryName], childrenEntry...)
+	}
+
+	newRev.Finalize(false)
+
+	return &newRev
+}
+
+// UpdateChildren will refresh the list of children with the provided ones
+// It will carefully go through the list and ensure that no child is lost
+func (npr *NonPersistedRevision) UpdateChildren(ctx context.Context, name string, children []Revision, branch *Branch) Revision {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+
+	// Construct a new revision based on the current one
+	updatedRev := &NonPersistedRevision{}
+	updatedRev.Config = NewDataRevision(npr.Root, npr.Config.Data)
+	updatedRev.Hash = npr.Hash
+	updatedRev.Branch = branch
+	updatedRev.Name = npr.Name
+	updatedRev.lastUpdate = npr.lastUpdate
+
+	updatedRev.Children = make(map[string][]Revision)
+	for entryName, childrenEntry := range branch.GetLatest().GetAllChildren() {
+		updatedRev.Children[entryName] = append(updatedRev.Children[entryName], childrenEntry...)
+	}
+
+	var updatedChildren []Revision
+
+	// Verify if the map contains already contains an entry matching the name value
+	// If so, we need to retain the contents of that entry and merge them with the provided children revision list
+	if existingChildren := branch.GetLatest().GetChildren(name); existingChildren != nil {
+		// Construct a map of unique child names with the respective index value
+		// for the children in the existing revision as well as the new ones
+		existingNames := make(map[string]int)
+		newNames := make(map[string]int)
+
+		for i, newChild := range children {
+			newNames[newChild.GetName()] = i
+		}
+
+		for i, existingChild := range existingChildren {
+			existingNames[existingChild.GetName()] = i
+
+			// If an existing entry is not in the new list, add it to the updated list, so it is not forgotten
+			if _, exists := newNames[existingChild.GetName()]; !exists {
+				updatedChildren = append(updatedChildren, existingChild)
+			}
+		}
+
+		log.Debugw("existing-children-names", log.Fields{"hash": npr.GetHash(), "names": existingNames})
+
+		// Merge existing and new children
+		for _, newChild := range children {
+			nameIndex, nameExists := existingNames[newChild.GetName()]
+
+			// Does the existing list contain a child with that name?
+			if nameExists {
+				// Check if the data has changed or not
+				if existingChildren[nameIndex].GetData().(proto.Message).String() != newChild.GetData().(proto.Message).String() {
+					log.Debugw("replacing-existing-child", log.Fields{
+						"old-hash": existingChildren[nameIndex].GetHash(),
+						"old-data": existingChildren[nameIndex].GetData(),
+						"new-hash": newChild.GetHash(),
+						"new-data": newChild.GetData(),
+					})
+
+					// replace entry
+					newChild.GetNode().SetRoot(existingChildren[nameIndex].GetNode().GetRoot())
+					updatedChildren = append(updatedChildren, newChild)
+				} else {
+					log.Debugw("keeping-existing-child", log.Fields{
+						"old-hash": existingChildren[nameIndex].GetHash(),
+						"old-data": existingChildren[nameIndex].GetData(),
+						"new-hash": newChild.GetHash(),
+						"new-data": newChild.GetData(),
+					})
+
+					// keep existing entry
+					updatedChildren = append(updatedChildren, existingChildren[nameIndex])
+				}
+			} else {
+				log.Debugw("adding-unknown-child", log.Fields{
+					"hash": newChild.GetHash(),
+					"data": newChild.GetData(),
+				})
+
+				// new entry ... just add it
+				updatedChildren = append(updatedChildren, newChild)
+			}
+		}
+
+		// Save children in new revision
+		updatedRev.SetChildren(name, updatedChildren)
+
+		updatedNames := make(map[string]int)
+		for i, updatedChild := range updatedChildren {
+			updatedNames[updatedChild.GetName()] = i
+		}
+
+		log.Debugw("updated-children-names", log.Fields{"hash": npr.GetHash(), "names": updatedNames})
+
+	} else {
+		// There are no children available, just save the provided ones
+		updatedRev.SetChildren(name, children)
+	}
+
+	updatedRev.Finalize(false)
+
+	return updatedRev
+}
+
+// UpdateAllChildren will replace the current list of children with the provided ones
+func (npr *NonPersistedRevision) UpdateAllChildren(children map[string][]Revision, branch *Branch) Revision {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+
+	newRev := npr
+	newRev.Config = npr.Config
+	newRev.Hash = npr.Hash
+	newRev.Branch = branch
+	newRev.Name = npr.Name
+	newRev.lastUpdate = npr.lastUpdate
+
+	newRev.Children = make(map[string][]Revision)
+	for entryName, childrenEntry := range children {
+		newRev.Children[entryName] = append(newRev.Children[entryName], childrenEntry...)
+	}
+	newRev.Finalize(false)
+
+	return newRev
+}
+
+// Drop is used to indicate when a revision is no longer required
+func (npr *NonPersistedRevision) Drop(txid string, includeConfig bool) {
+	log.Debugw("dropping-revision", log.Fields{"hash": npr.GetHash(), "name": npr.GetName()})
+}
+
+// ChildDrop will remove a child entry matching the provided parameters from the current revision
+func (npr *NonPersistedRevision) ChildDrop(childType string, childHash string) {
+	if childType != "" {
+		children := make([]Revision, len(npr.GetChildren(childType)))
+		copy(children, npr.GetChildren(childType))
+		for i, child := range children {
+			if child.GetHash() == childHash {
+				children = append(children[:i], children[i+1:]...)
+				npr.SetChildren(childType, children)
+				break
+			}
+		}
+	}
+}
+
+func (npr *NonPersistedRevision) SetLastUpdate(ts ...time.Time) {
+	npr.mutex.Lock()
+	defer npr.mutex.Unlock()
+
+	if ts != nil && len(ts) > 0 {
+		npr.lastUpdate = ts[0]
+	} else {
+		npr.lastUpdate = time.Now()
+	}
+}
+
+func (npr *NonPersistedRevision) GetLastUpdate() time.Time {
+	npr.mutex.RLock()
+	defer npr.mutex.RUnlock()
+
+	return npr.lastUpdate
+}
+
+func (npr *NonPersistedRevision) LoadFromPersistence(ctx context.Context, path string, txid string, blobs map[string]*kvstore.KVPair) []Revision {
+	// stub... required by interface
+	return nil
+}
+
+func (npr *NonPersistedRevision) SetupWatch(key string) {
+	// stub ... required by interface
+}
+
+func (npr *NonPersistedRevision) StorageDrop(txid string, includeConfig bool) {
+	// stub ... required by interface
+}
+
+func (npr *NonPersistedRevision) getVersion() int64 {
+	return -1
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/persisted_revision.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/persisted_revision.go
new file mode 100644
index 0000000..c644e14
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/persisted_revision.go
@@ -0,0 +1,614 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"bytes"
+	"compress/gzip"
+	"context"
+	"github.com/golang/protobuf/proto"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+	"strings"
+	"sync"
+)
+
+// PersistedRevision holds information of revision meant to be saved in a persistent storage
+type PersistedRevision struct {
+	Revision
+	Compress bool
+
+	events       chan *kvstore.Event
+	kvStore      *Backend
+	mutex        sync.RWMutex
+	versionMutex sync.RWMutex
+	Version      int64
+	isStored     bool
+	isWatched    bool
+}
+
+type watchCache struct {
+	Cache sync.Map
+}
+
+var watchCacheInstance *watchCache
+var watchCacheOne sync.Once
+
+func Watches() *watchCache {
+	watchCacheOne.Do(func() {
+		watchCacheInstance = &watchCache{Cache: sync.Map{}}
+	})
+	return watchCacheInstance
+}
+
+// NewPersistedRevision creates a new instance of a PersistentRevision structure
+func NewPersistedRevision(branch *Branch, data interface{}, children map[string][]Revision) Revision {
+	pr := &PersistedRevision{}
+	pr.kvStore = branch.Node.GetRoot().KvStore
+	pr.Version = 1
+	pr.Revision = NewNonPersistedRevision(nil, branch, data, children)
+	return pr
+}
+
+func (pr *PersistedRevision) getVersion() int64 {
+	pr.versionMutex.RLock()
+	defer pr.versionMutex.RUnlock()
+	return pr.Version
+}
+
+func (pr *PersistedRevision) setVersion(version int64) {
+	pr.versionMutex.Lock()
+	defer pr.versionMutex.Unlock()
+	pr.Version = version
+}
+
+// Finalize is responsible of saving the revision in the persistent storage
+func (pr *PersistedRevision) Finalize(skipOnExist bool) {
+	pr.store(skipOnExist)
+}
+
+func (pr *PersistedRevision) store(skipOnExist bool) {
+	if pr.GetBranch().Txid != "" {
+		return
+	}
+
+	log.Debugw("ready-to-store-revision", log.Fields{"hash": pr.GetHash(), "name": pr.GetName(), "data": pr.GetData()})
+
+	// clone the revision data to avoid any race conditions with processes
+	// accessing the same data
+	cloned := proto.Clone(pr.GetConfig().Data.(proto.Message))
+
+	if blob, err := proto.Marshal(cloned); err != nil {
+		log.Errorw("problem-to-marshal", log.Fields{"error": err, "hash": pr.GetHash(), "name": pr.GetName(), "data": pr.GetData()})
+	} else {
+		if pr.Compress {
+			var b bytes.Buffer
+			w := gzip.NewWriter(&b)
+			w.Write(blob)
+			w.Close()
+			blob = b.Bytes()
+		}
+
+		GetRevCache().Set(pr.GetName(), pr)
+		if err := pr.kvStore.Put(pr.GetName(), blob); err != nil {
+			log.Warnw("problem-storing-revision", log.Fields{"error": err, "hash": pr.GetHash(), "name": pr.GetName(), "data": pr.GetConfig().Data})
+		} else {
+			log.Debugw("storing-revision", log.Fields{"hash": pr.GetHash(), "name": pr.GetName(), "data": pr.GetConfig().Data, "version": pr.getVersion()})
+			pr.isStored = true
+		}
+	}
+}
+
+func (pr *PersistedRevision) SetupWatch(key string) {
+	if key == "" {
+		log.Debugw("ignoring-watch", log.Fields{"key": key, "revision-hash": pr.GetHash()})
+		return
+	}
+
+	if _, exists := Watches().Cache.LoadOrStore(key+"-"+pr.GetHash(), struct{}{}); exists {
+		return
+	}
+
+	if pr.events == nil {
+		pr.events = make(chan *kvstore.Event)
+
+		log.Debugw("setting-watch-channel", log.Fields{"key": key, "revision-hash": pr.GetHash()})
+
+		pr.SetName(key)
+		pr.events = pr.kvStore.CreateWatch(key)
+	}
+
+	if !pr.isWatched {
+		pr.isWatched = true
+
+		log.Debugw("setting-watch-routine", log.Fields{"key": key, "revision-hash": pr.GetHash()})
+
+		// Start watching
+		go pr.startWatching()
+	}
+}
+
+func (pr *PersistedRevision) startWatching() {
+	log.Debugw("starting-watch", log.Fields{"key": pr.GetHash(), "watch": pr.GetName()})
+
+StopWatchLoop:
+	for {
+		latestRev := pr.GetBranch().GetLatest()
+
+		select {
+		case event, ok := <-pr.events:
+			if !ok {
+				log.Errorw("event-channel-failure: stopping watch loop", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName()})
+				break StopWatchLoop
+			}
+			log.Debugw("received-event", log.Fields{"type": event.EventType, "watch": latestRev.GetName()})
+
+			switch event.EventType {
+			case kvstore.DELETE:
+				log.Debugw("delete-from-memory", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName()})
+				pr.Revision.Drop("", true)
+				break StopWatchLoop
+
+			case kvstore.PUT:
+				log.Debugw("update-in-memory", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName()})
+				if latestRev.getVersion() >= event.Version {
+					log.Debugw("skipping-matching-or-older-revision", log.Fields{
+						"watch":          latestRev.GetName(),
+						"watch-version":  event.Version,
+						"latest-version": latestRev.getVersion(),
+					})
+					continue
+				} else {
+					log.Debugw("watch-revision-is-newer", log.Fields{
+						"watch":          latestRev.GetName(),
+						"watch-version":  event.Version,
+						"latest-version": latestRev.getVersion(),
+					})
+				}
+
+				data := reflect.New(reflect.TypeOf(latestRev.GetData()).Elem())
+
+				if err := proto.Unmarshal(event.Value.([]byte), data.Interface().(proto.Message)); err != nil {
+					log.Errorw("failed-to-unmarshal-watch-data", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName(), "error": err})
+				} else {
+					log.Debugw("un-marshaled-watch-data", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName(), "data": data.Interface()})
+
+					var pathLock string
+					var blobs map[string]*kvstore.KVPair
+
+					// The watch reported new persistence data.
+					// Construct an object that will be used to update the memory
+					blobs = make(map[string]*kvstore.KVPair)
+					key, _ := kvstore.ToString(event.Key)
+					blobs[key] = &kvstore.KVPair{
+						Key:     key,
+						Value:   event.Value,
+						Session: "",
+						Lease:   0,
+						Version: event.Version,
+					}
+
+					if latestRev.GetNode().GetProxy() != nil {
+						//
+						// If a proxy exists for this revision, use it to lock access to the path
+						// and prevent simultaneous updates to the object in memory
+						//
+
+						//If the proxy already has a request in progress, then there is no need to process the watch
+						if latestRev.GetNode().GetProxy().GetOperation() != PROXY_NONE {
+							log.Debugw("operation-in-progress", log.Fields{
+								"key":       latestRev.GetHash(),
+								"path":      latestRev.GetNode().GetProxy().getFullPath(),
+								"operation": latestRev.GetNode().GetProxy().operation.String(),
+							})
+							continue
+						}
+
+						pathLock, _ = latestRev.GetNode().GetProxy().parseForControlledPath(latestRev.GetNode().GetProxy().getFullPath())
+
+						// Reserve the path to prevent others to modify while we reload from persistence
+						latestRev.GetNode().GetProxy().GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+						latestRev.GetNode().GetProxy().SetOperation(PROXY_WATCH)
+
+						// Load changes and apply to memory
+						latestRev.LoadFromPersistence(context.Background(), latestRev.GetName(), "", blobs)
+
+						// Release path
+						latestRev.GetNode().GetProxy().GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+
+					} else {
+						// This block should be reached only if coming from a non-proxied request
+						log.Debugw("revision-with-no-proxy", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName()})
+
+						// Load changes and apply to memory
+						latestRev.LoadFromPersistence(context.Background(), latestRev.GetName(), "", blobs)
+					}
+				}
+
+			default:
+				log.Debugw("unhandled-event", log.Fields{"key": latestRev.GetHash(), "watch": latestRev.GetName(), "type": event.EventType})
+			}
+		}
+	}
+
+	Watches().Cache.Delete(pr.GetName() + "-" + pr.GetHash())
+
+	log.Debugw("exiting-watch", log.Fields{"key": pr.GetHash(), "watch": pr.GetName()})
+}
+
+// UpdateData modifies the information in the data model and saves it in the persistent storage
+func (pr *PersistedRevision) UpdateData(ctx context.Context, data interface{}, branch *Branch) Revision {
+	log.Debugw("updating-persisted-data", log.Fields{"hash": pr.GetHash()})
+
+	newNPR := pr.Revision.UpdateData(ctx, data, branch)
+
+	newPR := &PersistedRevision{
+		Revision:  newNPR,
+		Compress:  pr.Compress,
+		kvStore:   pr.kvStore,
+		events:    pr.events,
+		Version:   pr.getVersion(),
+		isWatched: pr.isWatched,
+	}
+
+	if newPR.GetHash() != pr.GetHash() {
+		newPR.isStored = false
+		pr.Drop(branch.Txid, false)
+		pr.Drop(branch.Txid, false)
+	} else {
+		newPR.isStored = true
+	}
+
+	return newPR
+}
+
+// UpdateChildren modifies the children of a revision and of a specific component and saves it in the persistent storage
+func (pr *PersistedRevision) UpdateChildren(ctx context.Context, name string, children []Revision, branch *Branch) Revision {
+	log.Debugw("updating-persisted-children", log.Fields{"hash": pr.GetHash()})
+
+	newNPR := pr.Revision.UpdateChildren(ctx, name, children, branch)
+
+	newPR := &PersistedRevision{
+		Revision:  newNPR,
+		Compress:  pr.Compress,
+		kvStore:   pr.kvStore,
+		events:    pr.events,
+		Version:   pr.getVersion(),
+		isWatched: pr.isWatched,
+	}
+
+	if newPR.GetHash() != pr.GetHash() {
+		newPR.isStored = false
+		pr.Drop(branch.Txid, false)
+	} else {
+		newPR.isStored = true
+	}
+
+	return newPR
+}
+
+// UpdateAllChildren modifies the children for all components of a revision and saves it in the peristent storage
+func (pr *PersistedRevision) UpdateAllChildren(children map[string][]Revision, branch *Branch) Revision {
+	log.Debugw("updating-all-persisted-children", log.Fields{"hash": pr.GetHash()})
+
+	newNPR := pr.Revision.UpdateAllChildren(children, branch)
+
+	newPR := &PersistedRevision{
+		Revision:  newNPR,
+		Compress:  pr.Compress,
+		kvStore:   pr.kvStore,
+		events:    pr.events,
+		Version:   pr.getVersion(),
+		isWatched: pr.isWatched,
+	}
+
+	if newPR.GetHash() != pr.GetHash() {
+		newPR.isStored = false
+		pr.Drop(branch.Txid, false)
+	} else {
+		newPR.isStored = true
+	}
+
+	return newPR
+}
+
+// Drop takes care of eliminating a revision hash that is no longer needed
+// and its associated config when required
+func (pr *PersistedRevision) Drop(txid string, includeConfig bool) {
+	pr.Revision.Drop(txid, includeConfig)
+}
+
+// Drop takes care of eliminating a revision hash that is no longer needed
+// and its associated config when required
+func (pr *PersistedRevision) StorageDrop(txid string, includeConfig bool) {
+	log.Debugw("dropping-revision", log.Fields{"txid": txid, "hash": pr.GetHash(), "config-hash": pr.GetConfig().Hash})
+
+	pr.mutex.Lock()
+	defer pr.mutex.Unlock()
+	if pr.kvStore != nil && txid == "" {
+		if pr.isStored {
+			if pr.isWatched {
+				pr.kvStore.DeleteWatch(pr.GetName(), pr.events)
+				pr.isWatched = false
+			}
+
+			if err := pr.kvStore.Delete(pr.GetName()); err != nil {
+				log.Errorw("failed-to-remove-revision", log.Fields{"hash": pr.GetHash(), "error": err.Error()})
+			} else {
+				pr.isStored = false
+			}
+		}
+
+	} else {
+		if includeConfig {
+			log.Debugw("attempted-to-remove-transacted-revision-config", log.Fields{"hash": pr.GetConfig().Hash, "txid": txid})
+		}
+		log.Debugw("attempted-to-remove-transacted-revision", log.Fields{"hash": pr.GetHash(), "txid": txid})
+	}
+
+	pr.Revision.Drop(txid, includeConfig)
+}
+
+// verifyPersistedEntry validates if the provided data is available or not in memory and applies updates as required
+func (pr *PersistedRevision) verifyPersistedEntry(ctx context.Context, data interface{}, typeName string, keyName string,
+	keyValue string, txid string, version int64) (response Revision) {
+	// Parent which holds the current node entry
+	parent := pr.GetBranch().Node.GetRoot()
+
+	// Get a copy of the parent's children
+	children := make([]Revision, len(parent.GetBranch(NONE).Latest.GetChildren(typeName)))
+	copy(children, parent.GetBranch(NONE).Latest.GetChildren(typeName))
+
+	// Verify if a child with the provided key value can be found
+	if childIdx, childRev := pr.GetNode().findRevByKey(children, keyName, keyValue); childRev != nil {
+		// A child matching the provided key exists in memory
+		// Verify if the data differs from what was retrieved from persistence
+		// Also check if we are treating a newer revision of the data or not
+		if childRev.GetData().(proto.Message).String() != data.(proto.Message).String() && childRev.getVersion() < version {
+			log.Debugw("revision-data-is-different", log.Fields{
+				"key":     childRev.GetHash(),
+				"name":    childRev.GetName(),
+				"data":    childRev.GetData(),
+				"version": childRev.getVersion(),
+			})
+
+			//
+			// Data has changed; replace the child entry and update the parent revision
+			//
+
+			// BEGIN Lock child -- prevent any incoming changes
+			childRev.GetBranch().LatestLock.Lock()
+
+			// Update child
+			updatedChildRev := childRev.UpdateData(ctx, data, childRev.GetBranch())
+
+			updatedChildRev.GetNode().SetProxy(childRev.GetNode().GetProxy())
+			updatedChildRev.SetupWatch(updatedChildRev.GetName())
+			updatedChildRev.SetLastUpdate()
+			updatedChildRev.(*PersistedRevision).setVersion(version)
+
+			// Update cache
+			GetRevCache().Set(updatedChildRev.GetName(), updatedChildRev)
+			childRev.Drop(txid, false)
+
+			childRev.GetBranch().LatestLock.Unlock()
+			// END lock child
+
+			// Update child entry
+			children[childIdx] = updatedChildRev
+
+			// BEGIN lock parent -- Update parent
+			parent.GetBranch(NONE).LatestLock.Lock()
+
+			updatedRev := parent.GetBranch(NONE).GetLatest().UpdateChildren(ctx, typeName, children, parent.GetBranch(NONE))
+			parent.GetBranch(NONE).Node.makeLatest(parent.GetBranch(NONE), updatedRev, nil)
+
+			parent.GetBranch(NONE).LatestLock.Unlock()
+			// END lock parent
+
+			// Drop the previous child revision
+			parent.GetBranch(NONE).Latest.ChildDrop(typeName, childRev.GetHash())
+
+			if updatedChildRev != nil {
+				log.Debugw("verify-persisted-entry--adding-child", log.Fields{
+					"key":  updatedChildRev.GetHash(),
+					"name": updatedChildRev.GetName(),
+					"data": updatedChildRev.GetData(),
+				})
+				response = updatedChildRev
+			}
+		} else {
+			if childRev != nil {
+				log.Debugw("keeping-revision-data", log.Fields{
+					"key":  childRev.GetHash(),
+					"name": childRev.GetName(),
+					"data": childRev.GetData(),
+				})
+
+				// Update timestamp to reflect when it was last read and to reset tracked timeout
+				childRev.SetLastUpdate()
+				if childRev.getVersion() < version {
+					childRev.(*PersistedRevision).setVersion(version)
+				}
+				GetRevCache().Set(childRev.GetName(), childRev)
+				response = childRev
+			}
+		}
+
+	} else {
+		// There is no available child with that key value.
+		// Create a new child and update the parent revision.
+		log.Debugw("no-such-revision-entry", log.Fields{
+			"key":  keyValue,
+			"name": typeName,
+			"data": data,
+		})
+
+		// BEGIN child lock
+		pr.GetBranch().LatestLock.Lock()
+
+		// Construct a new child node with the retrieved persistence data
+		childRev = pr.GetBranch().Node.MakeNode(data, txid).Latest(txid)
+
+		// We need to start watching this entry for future changes
+		childRev.SetName(typeName + "/" + keyValue)
+		childRev.SetupWatch(childRev.GetName())
+		childRev.(*PersistedRevision).setVersion(version)
+
+		// Add entry to cache
+		GetRevCache().Set(childRev.GetName(), childRev)
+
+		pr.GetBranch().LatestLock.Unlock()
+		// END child lock
+
+		//
+		// Add the child to the parent revision
+		//
+
+		// BEGIN parent lock
+		parent.GetBranch(NONE).LatestLock.Lock()
+		children = append(children, childRev)
+		updatedRev := parent.GetBranch(NONE).GetLatest().UpdateChildren(ctx, typeName, children, parent.GetBranch(NONE))
+		updatedRev.GetNode().SetProxy(parent.GetBranch(NONE).Node.GetProxy())
+		parent.GetBranch(NONE).Node.makeLatest(parent.GetBranch(NONE), updatedRev, nil)
+		parent.GetBranch(NONE).LatestLock.Unlock()
+		// END parent lock
+
+		// Child entry is valid and can be included in the response object
+		if childRev != nil {
+			log.Debugw("adding-revision-to-response", log.Fields{
+				"key":  childRev.GetHash(),
+				"name": childRev.GetName(),
+				"data": childRev.GetData(),
+			})
+			response = childRev
+		}
+	}
+
+	return response
+}
+
+// LoadFromPersistence retrieves data from kv store at the specified location and refreshes the memory
+// by adding missing entries, updating changed entries and ignoring unchanged ones
+func (pr *PersistedRevision) LoadFromPersistence(ctx context.Context, path string, txid string, blobs map[string]*kvstore.KVPair) []Revision {
+	pr.mutex.Lock()
+	defer pr.mutex.Unlock()
+
+	log.Debugw("loading-from-persistence", log.Fields{"path": path, "txid": txid})
+
+	var response []Revision
+
+	for strings.HasPrefix(path, "/") {
+		path = path[1:]
+	}
+
+	if pr.kvStore != nil && path != "" {
+		if blobs == nil || len(blobs) == 0 {
+			log.Debugw("retrieve-from-kv", log.Fields{"path": path, "txid": txid})
+			blobs, _ = pr.kvStore.List(path)
+		}
+
+		partition := strings.SplitN(path, "/", 2)
+		name := partition[0]
+
+		var nodeType interface{}
+		if len(partition) < 2 {
+			path = ""
+			nodeType = pr.GetBranch().Node.Type
+		} else {
+			path = partition[1]
+			nodeType = pr.GetBranch().Node.GetRoot().Type
+		}
+
+		field := ChildrenFields(nodeType)[name]
+
+		if field != nil && field.IsContainer {
+			log.Debugw("parsing-data-blobs", log.Fields{
+				"path": path,
+				"name": name,
+				"size": len(blobs),
+			})
+
+			for _, blob := range blobs {
+				output := blob.Value.([]byte)
+
+				data := reflect.New(field.ClassType.Elem())
+
+				if err := proto.Unmarshal(output, data.Interface().(proto.Message)); err != nil {
+					log.Errorw("failed-to-unmarshal", log.Fields{
+						"path":  path,
+						"txid":  txid,
+						"error": err,
+					})
+				} else if path == "" {
+					if field.Key != "" {
+						log.Debugw("no-path-with-container-key", log.Fields{
+							"path": path,
+							"txid": txid,
+							"data": data.Interface(),
+						})
+
+						// Retrieve the key identifier value from the data structure
+						// based on the field's key attribute
+						_, key := GetAttributeValue(data.Interface(), field.Key, 0)
+
+						if entry := pr.verifyPersistedEntry(ctx, data.Interface(), name, field.Key, key.String(), txid, blob.Version); entry != nil {
+							response = append(response, entry)
+						}
+					} else {
+						log.Debugw("path-with-no-container-key", log.Fields{
+							"path": path,
+							"txid": txid,
+							"data": data.Interface(),
+						})
+					}
+
+				} else if field.Key != "" {
+					log.Debugw("path-with-container-key", log.Fields{
+						"path": path,
+						"txid": txid,
+						"data": data.Interface(),
+					})
+					// The request is for a specific entry/id
+					partition := strings.SplitN(path, "/", 2)
+					key := partition[0]
+					if len(partition) < 2 {
+						path = ""
+					} else {
+						path = partition[1]
+					}
+					keyValue := field.KeyFromStr(key)
+
+					if entry := pr.verifyPersistedEntry(ctx, data.Interface(), name, field.Key, keyValue.(string), txid, blob.Version); entry != nil {
+						response = append(response, entry)
+					}
+				}
+			}
+
+			log.Debugw("no-more-data-blobs", log.Fields{"path": path, "name": name})
+		} else {
+			log.Debugw("cannot-process-field", log.Fields{
+				"type": pr.GetBranch().Node.Type,
+				"name": name,
+			})
+		}
+	}
+
+	return response
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/profiling.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/profiling.go
new file mode 100644
index 0000000..c50c9f6
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/profiling.go
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"sync"
+)
+
+// Profiling is used to store performance details collected at runtime
+type profiling struct {
+	sync.RWMutex
+	DatabaseRetrieveTime  float64
+	DatabaseRetrieveCount int
+	InMemoryModelTime     float64
+	InMemoryModelCount    int
+	InMemoryProcessTime   float64
+	DatabaseStoreTime     float64
+	InMemoryLockTime      float64
+	InMemoryLockCount     int
+}
+
+var profilingInstance *profiling
+var profilingOnce sync.Once
+
+// GetProfiling returns a singleton instance of the Profiling structure
+func GetProfiling() *profiling {
+	profilingOnce.Do(func() {
+		profilingInstance = &profiling{}
+	})
+	return profilingInstance
+}
+
+// AddToDatabaseRetrieveTime appends a time period to retrieve data from the database
+func (p *profiling) AddToDatabaseRetrieveTime(period float64) {
+	p.Lock()
+	defer p.Unlock()
+
+	p.DatabaseRetrieveTime += period
+	p.DatabaseRetrieveCount++
+}
+
+// AddToInMemoryModelTime appends a time period to construct/deconstruct data in memory
+func (p *profiling) AddToInMemoryModelTime(period float64) {
+	p.Lock()
+	defer p.Unlock()
+
+	p.InMemoryModelTime += period
+	p.InMemoryModelCount++
+}
+
+// AddToInMemoryProcessTime appends a time period to process data
+func (p *profiling) AddToInMemoryProcessTime(period float64) {
+	p.Lock()
+	defer p.Unlock()
+
+	p.InMemoryProcessTime += period
+}
+
+// AddToDatabaseStoreTime appends a time period to store data in the database
+func (p *profiling) AddToDatabaseStoreTime(period float64) {
+	p.Lock()
+	defer p.Unlock()
+
+	p.DatabaseStoreTime += period
+}
+
+// AddToInMemoryLockTime appends a time period when a code block was locked
+func (p *profiling) AddToInMemoryLockTime(period float64) {
+	p.Lock()
+	defer p.Unlock()
+
+	p.InMemoryLockTime += period
+	p.InMemoryLockCount++
+}
+
+// Reset initializes the profile counters
+func (p *profiling) Reset() {
+	p.Lock()
+	defer p.Unlock()
+
+	p.DatabaseRetrieveTime = 0
+	p.DatabaseRetrieveCount = 0
+	p.InMemoryModelTime = 0
+	p.InMemoryModelCount = 0
+	p.InMemoryProcessTime = 0
+	p.DatabaseStoreTime = 0
+	p.InMemoryLockTime = 0
+	p.InMemoryLockCount = 0
+}
+
+// Report will provide the current profile counter status
+func (p *profiling) Report() {
+	p.Lock()
+	defer p.Unlock()
+
+	log.Infof("[ Profiling Report ]")
+	log.Infof("Database Retrieval : %f", p.DatabaseRetrieveTime)
+	log.Infof("Database Retrieval Count : %d", p.DatabaseRetrieveCount)
+	log.Infof("Avg Database Retrieval : %f", p.DatabaseRetrieveTime/float64(p.DatabaseRetrieveCount))
+	log.Infof("In-Memory Modeling : %f", p.InMemoryModelTime)
+	log.Infof("In-Memory Modeling Count: %d", p.InMemoryModelCount)
+	log.Infof("Avg In-Memory Modeling : %f", p.InMemoryModelTime/float64(p.InMemoryModelCount))
+	log.Infof("In-Memory Locking : %f", p.InMemoryLockTime)
+	log.Infof("In-Memory Locking Count: %d", p.InMemoryLockCount)
+	log.Infof("Avg In-Memory Locking : %f", p.InMemoryLockTime/float64(p.InMemoryLockCount))
+
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/proxy.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/proxy.go
new file mode 100644
index 0000000..2d2c24e
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/proxy.go
@@ -0,0 +1,598 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"context"
+	"crypto/md5"
+	"errors"
+	"fmt"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+	"runtime"
+	"strings"
+	"sync"
+)
+
+// OperationContext holds details on the information used during an operation
+type OperationContext struct {
+	Path      string
+	Data      interface{}
+	FieldName string
+	ChildKey  string
+}
+
+// NewOperationContext instantiates a new OperationContext structure
+func NewOperationContext(path string, data interface{}, fieldName string, childKey string) *OperationContext {
+	oc := &OperationContext{
+		Path:      path,
+		Data:      data,
+		FieldName: fieldName,
+		ChildKey:  childKey,
+	}
+	return oc
+}
+
+// Update applies new data to the context structure
+func (oc *OperationContext) Update(data interface{}) *OperationContext {
+	oc.Data = data
+	return oc
+}
+
+// Proxy holds the information for a specific location with the data model
+type Proxy struct {
+	mutex      sync.RWMutex
+	Root       *root
+	Node       *node
+	ParentNode *node
+	Path       string
+	FullPath   string
+	Exclusive  bool
+	Callbacks  map[CallbackType]map[string]*CallbackTuple
+	operation  ProxyOperation
+}
+
+// NewProxy instantiates a new proxy to a specific location
+func NewProxy(root *root, node *node, parentNode *node, path string, fullPath string, exclusive bool) *Proxy {
+	callbacks := make(map[CallbackType]map[string]*CallbackTuple)
+	if fullPath == "/" {
+		fullPath = ""
+	}
+	p := &Proxy{
+		Root:       root,
+		Node:       node,
+		ParentNode: parentNode,
+		Exclusive:  exclusive,
+		Path:       path,
+		FullPath:   fullPath,
+		Callbacks:  callbacks,
+	}
+	return p
+}
+
+// GetRoot returns the root attribute of the proxy
+func (p *Proxy) GetRoot() *root {
+	return p.Root
+}
+
+// getPath returns the path attribute of the proxy
+func (p *Proxy) getPath() string {
+	return p.Path
+}
+
+// getFullPath returns the full path attribute of the proxy
+func (p *Proxy) getFullPath() string {
+	return p.FullPath
+}
+
+// getCallbacks returns the full list of callbacks associated to the proxy
+func (p *Proxy) getCallbacks(callbackType CallbackType) map[string]*CallbackTuple {
+	p.mutex.RLock()
+	defer p.mutex.RUnlock()
+
+	if p != nil {
+		if cb, exists := p.Callbacks[callbackType]; exists {
+			return cb
+		}
+	} else {
+		log.Debugw("proxy-is-nil", log.Fields{"callback-type": callbackType.String()})
+	}
+	return nil
+}
+
+// getCallback returns a specific callback matching the type and function hash
+func (p *Proxy) getCallback(callbackType CallbackType, funcHash string) *CallbackTuple {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	if tuple, exists := p.Callbacks[callbackType][funcHash]; exists {
+		return tuple
+	}
+	return nil
+}
+
+// setCallbacks applies a callbacks list to a type
+func (p *Proxy) setCallbacks(callbackType CallbackType, callbacks map[string]*CallbackTuple) {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	p.Callbacks[callbackType] = callbacks
+}
+
+// setCallback applies a callback to a type and hash value
+func (p *Proxy) setCallback(callbackType CallbackType, funcHash string, tuple *CallbackTuple) {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	p.Callbacks[callbackType][funcHash] = tuple
+}
+
+// DeleteCallback removes a callback matching the type and hash
+func (p *Proxy) DeleteCallback(callbackType CallbackType, funcHash string) {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	delete(p.Callbacks[callbackType], funcHash)
+}
+
+// CallbackType is an enumerated value to express when a callback should be executed
+type ProxyOperation uint8
+
+// Enumerated list of callback types
+const (
+	PROXY_NONE ProxyOperation = iota
+	PROXY_GET
+	PROXY_LIST
+	PROXY_ADD
+	PROXY_UPDATE
+	PROXY_REMOVE
+	PROXY_CREATE
+	PROXY_WATCH
+)
+
+var proxyOperationTypes = []string{
+	"PROXY_NONE",
+	"PROXY_GET",
+	"PROXY_LIST",
+	"PROXY_ADD",
+	"PROXY_UPDATE",
+	"PROXY_REMOVE",
+	"PROXY_CREATE",
+	"PROXY_WATCH",
+}
+
+func (t ProxyOperation) String() string {
+	return proxyOperationTypes[t]
+}
+
+func (p *Proxy) GetOperation() ProxyOperation {
+	p.mutex.RLock()
+	defer p.mutex.RUnlock()
+	return p.operation
+}
+
+func (p *Proxy) SetOperation(operation ProxyOperation) {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+	p.operation = operation
+}
+
+// parseForControlledPath verifies if a proxy path matches a pattern
+// for locations that need to be access controlled.
+func (p *Proxy) parseForControlledPath(path string) (pathLock string, controlled bool) {
+	// TODO: Add other path prefixes that may need control
+	if strings.HasPrefix(path, "/devices") ||
+		strings.HasPrefix(path, "/logical_devices") ||
+		strings.HasPrefix(path, "/adapters") {
+
+		split := strings.SplitN(path, "/", -1)
+		switch len(split) {
+		case 2:
+			controlled = false
+			pathLock = ""
+			break
+		case 3:
+			fallthrough
+		default:
+			pathLock = fmt.Sprintf("%s/%s", split[1], split[2])
+			controlled = true
+		}
+	}
+	return pathLock, controlled
+}
+
+// List will retrieve information from the data model at the specified path location
+// A list operation will force access to persistence storage
+func (p *Proxy) List(ctx context.Context, path string, depth int, deep bool, txid string) interface{} {
+	var effectivePath string
+	if path == "/" {
+		effectivePath = p.getFullPath()
+	} else {
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_LIST)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-list", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	rv := p.GetRoot().List(ctx, path, "", depth, deep, txid)
+
+	return rv
+}
+
+// Get will retrieve information from the data model at the specified path location
+func (p *Proxy) Get(ctx context.Context, path string, depth int, deep bool, txid string) interface{} {
+	var effectivePath string
+	if path == "/" {
+		effectivePath = p.getFullPath()
+	} else {
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_GET)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-get", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	rv := p.GetRoot().Get(ctx, path, "", depth, deep, txid)
+
+	return rv
+}
+
+// Update will modify information in the data model at the specified location with the provided data
+func (p *Proxy) Update(ctx context.Context, path string, data interface{}, strict bool, txid string) interface{} {
+	if !strings.HasPrefix(path, "/") {
+		log.Errorf("invalid path: %s", path)
+		return nil
+	}
+	var fullPath string
+	var effectivePath string
+	if path == "/" {
+		fullPath = p.getPath()
+		effectivePath = p.getFullPath()
+	} else {
+		fullPath = p.getPath() + path
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_UPDATE)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-update", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"full":       fullPath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	if p.GetRoot().KvStore != nil {
+		p.GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+		defer p.GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+	}
+
+	result := p.GetRoot().Update(ctx, fullPath, data, strict, txid, nil)
+
+	if result != nil {
+		return result.GetData()
+	}
+
+	return nil
+}
+
+// AddWithID will insert new data at specified location.
+// This method also allows the user to specify the ID of the data entry to ensure
+// that access control is active while inserting the information.
+func (p *Proxy) AddWithID(ctx context.Context, path string, id string, data interface{}, txid string) interface{} {
+	if !strings.HasPrefix(path, "/") {
+		log.Errorf("invalid path: %s", path)
+		return nil
+	}
+	var fullPath string
+	var effectivePath string
+	if path == "/" {
+		fullPath = p.getPath()
+		effectivePath = p.getFullPath()
+	} else {
+		fullPath = p.getPath() + path
+		effectivePath = p.getFullPath() + path + "/" + id
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_ADD)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-add-with-id", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"full":       fullPath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	if p.GetRoot().KvStore != nil {
+		p.GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+		defer p.GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+	}
+
+	result := p.GetRoot().Add(ctx, fullPath, data, txid, nil)
+
+	if result != nil {
+		return result.GetData()
+	}
+
+	return nil
+}
+
+// Add will insert new data at specified location.
+func (p *Proxy) Add(ctx context.Context, path string, data interface{}, txid string) interface{} {
+	if !strings.HasPrefix(path, "/") {
+		log.Errorf("invalid path: %s", path)
+		return nil
+	}
+	var fullPath string
+	var effectivePath string
+	if path == "/" {
+		fullPath = p.getPath()
+		effectivePath = p.getFullPath()
+	} else {
+		fullPath = p.getPath() + path
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_ADD)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-add", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"full":       fullPath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	if p.GetRoot().KvStore != nil {
+		p.GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+		defer p.GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+	}
+
+	result := p.GetRoot().Add(ctx, fullPath, data, txid, nil)
+
+	if result != nil {
+		return result.GetData()
+	}
+
+	return nil
+}
+
+// Remove will delete an entry at the specified location
+func (p *Proxy) Remove(ctx context.Context, path string, txid string) interface{} {
+	if !strings.HasPrefix(path, "/") {
+		log.Errorf("invalid path: %s", path)
+		return nil
+	}
+	var fullPath string
+	var effectivePath string
+	if path == "/" {
+		fullPath = p.getPath()
+		effectivePath = p.getFullPath()
+	} else {
+		fullPath = p.getPath() + path
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_REMOVE)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-remove", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"full":       fullPath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	if p.GetRoot().KvStore != nil {
+		p.GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+		defer p.GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+	}
+
+	result := p.GetRoot().Remove(ctx, fullPath, txid, nil)
+
+	if result != nil {
+		return result.GetData()
+	}
+
+	return nil
+}
+
+// CreateProxy to interact with specific path directly
+func (p *Proxy) CreateProxy(ctx context.Context, path string, exclusive bool) *Proxy {
+	if !strings.HasPrefix(path, "/") {
+		log.Errorf("invalid path: %s", path)
+		return nil
+	}
+
+	var fullPath string
+	var effectivePath string
+	if path == "/" {
+		fullPath = p.getPath()
+		effectivePath = p.getFullPath()
+	} else {
+		fullPath = p.getPath() + path
+		effectivePath = p.getFullPath() + path
+	}
+
+	pathLock, controlled := p.parseForControlledPath(effectivePath)
+
+	p.SetOperation(PROXY_CREATE)
+	defer p.SetOperation(PROXY_NONE)
+
+	log.Debugw("proxy-create", log.Fields{
+		"path":       path,
+		"effective":  effectivePath,
+		"full":       fullPath,
+		"pathLock":   pathLock,
+		"controlled": controlled,
+		"operation":  p.GetOperation(),
+	})
+
+	if p.GetRoot().KvStore != nil {
+		p.GetRoot().KvStore.Client.Reserve(pathLock+"_", uuid.New().String(), ReservationTTL)
+		defer p.GetRoot().KvStore.Client.ReleaseReservation(pathLock + "_")
+	}
+
+	return p.GetRoot().CreateProxy(ctx, fullPath, exclusive)
+}
+
+// OpenTransaction creates a new transaction branch to isolate operations made to the data model
+func (p *Proxy) OpenTransaction() *Transaction {
+	txid := p.GetRoot().MakeTxBranch()
+	return NewTransaction(p, txid)
+}
+
+// commitTransaction will apply and merge modifications made in the transaction branch to the data model
+func (p *Proxy) commitTransaction(txid string) {
+	p.GetRoot().FoldTxBranch(txid)
+}
+
+// cancelTransaction will terminate a transaction branch along will all changes within it
+func (p *Proxy) cancelTransaction(txid string) {
+	p.GetRoot().DeleteTxBranch(txid)
+}
+
+// CallbackFunction is a type used to define callback functions
+type CallbackFunction func(args ...interface{}) interface{}
+
+// CallbackTuple holds the function and arguments details of a callback
+type CallbackTuple struct {
+	callback CallbackFunction
+	args     []interface{}
+}
+
+// Execute will process the a callback with its provided arguments
+func (tuple *CallbackTuple) Execute(contextArgs []interface{}) interface{} {
+	args := []interface{}{}
+
+	for _, ta := range tuple.args {
+		args = append(args, ta)
+	}
+
+	if contextArgs != nil {
+		for _, ca := range contextArgs {
+			args = append(args, ca)
+		}
+	}
+
+	return tuple.callback(args...)
+}
+
+// RegisterCallback associates a callback to the proxy
+func (p *Proxy) RegisterCallback(callbackType CallbackType, callback CallbackFunction, args ...interface{}) {
+	if p.getCallbacks(callbackType) == nil {
+		p.setCallbacks(callbackType, make(map[string]*CallbackTuple))
+	}
+	funcName := runtime.FuncForPC(reflect.ValueOf(callback).Pointer()).Name()
+	log.Debugf("value of function: %s", funcName)
+	funcHash := fmt.Sprintf("%x", md5.Sum([]byte(funcName)))[:12]
+
+	p.setCallback(callbackType, funcHash, &CallbackTuple{callback, args})
+}
+
+// UnregisterCallback removes references to a callback within a proxy
+func (p *Proxy) UnregisterCallback(callbackType CallbackType, callback CallbackFunction, args ...interface{}) {
+	if p.getCallbacks(callbackType) == nil {
+		log.Errorf("no such callback type - %s", callbackType.String())
+		return
+	}
+
+	funcName := runtime.FuncForPC(reflect.ValueOf(callback).Pointer()).Name()
+	funcHash := fmt.Sprintf("%x", md5.Sum([]byte(funcName)))[:12]
+
+	log.Debugf("value of function: %s", funcName)
+
+	if p.getCallback(callbackType, funcHash) == nil {
+		log.Errorf("function with hash value: '%s' not registered with callback type: '%s'", funcHash, callbackType)
+		return
+	}
+
+	p.DeleteCallback(callbackType, funcHash)
+}
+
+func (p *Proxy) invoke(callback *CallbackTuple, context []interface{}) (result interface{}, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			errStr := fmt.Sprintf("callback error occurred: %+v", r)
+			err = errors.New(errStr)
+			log.Error(errStr)
+		}
+	}()
+
+	result = callback.Execute(context)
+
+	return result, err
+}
+
+// InvokeCallbacks executes all callbacks associated to a specific type
+func (p *Proxy) InvokeCallbacks(args ...interface{}) (result interface{}) {
+	callbackType := args[0].(CallbackType)
+	proceedOnError := args[1].(bool)
+	context := args[2:]
+
+	var err error
+
+	if callbacks := p.getCallbacks(callbackType); callbacks != nil {
+		p.mutex.Lock()
+		for _, callback := range callbacks {
+			if result, err = p.invoke(callback, context); err != nil {
+				if !proceedOnError {
+					log.Info("An error occurred.  Stopping callback invocation")
+					break
+				}
+				log.Info("An error occurred.  Invoking next callback")
+			}
+		}
+		p.mutex.Unlock()
+	}
+
+	return result
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/revision.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/revision.go
new file mode 100644
index 0000000..bb61355
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/revision.go
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package model
+
+import (
+	"context"
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"time"
+)
+
+type Revision interface {
+	Finalize(bool)
+	SetConfig(revision *DataRevision)
+	GetConfig() *DataRevision
+	Drop(txid string, includeConfig bool)
+	StorageDrop(txid string, includeConfig bool)
+	ChildDrop(childType string, childHash string)
+	SetChildren(name string, children []Revision)
+	GetChildren(name string) []Revision
+	SetAllChildren(children map[string][]Revision)
+	GetAllChildren() map[string][]Revision
+	SetHash(hash string)
+	GetHash() string
+	ClearHash()
+	getVersion() int64
+	SetupWatch(key string)
+	SetName(name string)
+	GetName() string
+	SetBranch(branch *Branch)
+	GetBranch() *Branch
+	Get(int) interface{}
+	GetData() interface{}
+	GetNode() *node
+	SetLastUpdate(ts ...time.Time)
+	GetLastUpdate() time.Time
+	LoadFromPersistence(ctx context.Context, path string, txid string, blobs map[string]*kvstore.KVPair) []Revision
+	UpdateData(ctx context.Context, data interface{}, branch *Branch) Revision
+	UpdateChildren(ctx context.Context, name string, children []Revision, branch *Branch) Revision
+	UpdateAllChildren(children map[string][]Revision, branch *Branch) Revision
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/root.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/root.go
new file mode 100644
index 0000000..20c3721
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/root.go
@@ -0,0 +1,310 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"context"
+	"encoding/hex"
+	"encoding/json"
+	"github.com/golang/protobuf/proto"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	"reflect"
+	"sync"
+)
+
+// Root is used to provide an abstraction to the base root structure
+type Root interface {
+	Node
+
+	ExecuteCallbacks()
+	AddCallback(callback CallbackFunction, args ...interface{})
+	AddNotificationCallback(callback CallbackFunction, args ...interface{})
+}
+
+// root points to the top of the data model tree or sub-tree identified by a proxy
+type root struct {
+	*node
+
+	Callbacks             []CallbackTuple
+	NotificationCallbacks []CallbackTuple
+
+	DirtyNodes    map[string][]*node
+	KvStore       *Backend
+	Loading       bool
+	RevisionClass interface{}
+
+	mutex sync.RWMutex
+}
+
+// NewRoot creates an new instance of a root object
+func NewRoot(initialData interface{}, kvStore *Backend) *root {
+	root := &root{}
+
+	root.KvStore = kvStore
+	root.DirtyNodes = make(map[string][]*node)
+	root.Loading = false
+
+	// If there is no storage in place just revert to
+	// a non persistent mechanism
+	if kvStore != nil {
+		root.RevisionClass = reflect.TypeOf(PersistedRevision{})
+	} else {
+		root.RevisionClass = reflect.TypeOf(NonPersistedRevision{})
+	}
+
+	root.Callbacks = []CallbackTuple{}
+	root.NotificationCallbacks = []CallbackTuple{}
+
+	root.node = NewNode(root, initialData, false, "")
+
+	return root
+}
+
+// MakeTxBranch creates a new transaction branch
+func (r *root) MakeTxBranch() string {
+	txidBin, _ := uuid.New().MarshalBinary()
+	txid := hex.EncodeToString(txidBin)[:12]
+
+	r.DirtyNodes[txid] = []*node{r.node}
+	r.node.MakeBranch(txid)
+
+	return txid
+}
+
+// DeleteTxBranch removes a transaction branch
+func (r *root) DeleteTxBranch(txid string) {
+	for _, dirtyNode := range r.DirtyNodes[txid] {
+		dirtyNode.DeleteBranch(txid)
+	}
+	delete(r.DirtyNodes, txid)
+	r.node.DeleteBranch(txid)
+}
+
+// FoldTxBranch will merge the contents of a transaction branch with the root object
+func (r *root) FoldTxBranch(txid string) {
+	// Start by doing a dry run of the merge
+	// If that fails, it bails out and the branch is deleted
+	if _, err := r.node.MergeBranch(txid, true); err != nil {
+		// Merge operation fails
+		r.DeleteTxBranch(txid)
+	} else {
+		r.node.MergeBranch(txid, false)
+		r.node.GetRoot().ExecuteCallbacks()
+		r.DeleteTxBranch(txid)
+	}
+}
+
+// ExecuteCallbacks will invoke all the callbacks linked to root object
+func (r *root) ExecuteCallbacks() {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	for len(r.Callbacks) > 0 {
+		callback := r.Callbacks[0]
+		r.Callbacks = r.Callbacks[1:]
+		go callback.Execute(nil)
+	}
+	//for len(r.NotificationCallbacks) > 0 {
+	//	callback := r.NotificationCallbacks[0]
+	//	r.NotificationCallbacks = r.NotificationCallbacks[1:]
+	//	go callback.Execute(nil)
+	//}
+}
+
+func (r *root) hasCallbacks() bool {
+	return len(r.Callbacks) == 0
+}
+
+// getCallbacks returns the available callbacks
+func (r *root) GetCallbacks() []CallbackTuple {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	return r.Callbacks
+}
+
+// getCallbacks returns the available notification callbacks
+func (r *root) GetNotificationCallbacks() []CallbackTuple {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	return r.NotificationCallbacks
+}
+
+// AddCallback inserts a new callback with its arguments
+func (r *root) AddCallback(callback CallbackFunction, args ...interface{}) {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	r.Callbacks = append(r.Callbacks, CallbackTuple{callback, args})
+}
+
+// AddNotificationCallback inserts a new notification callback with its arguments
+func (r *root) AddNotificationCallback(callback CallbackFunction, args ...interface{}) {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	r.NotificationCallbacks = append(r.NotificationCallbacks, CallbackTuple{callback, args})
+}
+
+func (r *root) syncParent(childRev Revision, txid string) {
+	data := proto.Clone(r.GetProxy().ParentNode.Latest().GetData().(proto.Message))
+
+	for fieldName, _ := range ChildrenFields(data) {
+		childDataName, childDataHolder := GetAttributeValue(data, fieldName, 0)
+		if reflect.TypeOf(childRev.GetData()) == reflect.TypeOf(childDataHolder.Interface()) {
+			childDataHolder = reflect.ValueOf(childRev.GetData())
+			reflect.ValueOf(data).Elem().FieldByName(childDataName).Set(childDataHolder)
+		}
+	}
+
+	r.GetProxy().ParentNode.Latest().SetConfig(NewDataRevision(r.GetProxy().ParentNode.GetRoot(), data))
+	r.GetProxy().ParentNode.Latest(txid).Finalize(false)
+}
+
+// Update modifies the content of an object at a given path with the provided data
+func (r *root) Update(ctx context.Context, path string, data interface{}, strict bool, txid string, makeBranch MakeBranchFunction) Revision {
+	var result Revision
+
+	if makeBranch != nil {
+		// TODO: raise error
+	}
+
+	if r.hasCallbacks() {
+		// TODO: raise error
+	}
+
+	if txid != "" {
+		trackDirty := func(node *node) *Branch {
+			r.DirtyNodes[txid] = append(r.DirtyNodes[txid], node)
+			return node.MakeBranch(txid)
+		}
+		result = r.node.Update(ctx, path, data, strict, txid, trackDirty)
+	} else {
+		result = r.node.Update(ctx, path, data, strict, "", nil)
+	}
+
+	if result != nil {
+		if r.GetProxy().FullPath != r.GetProxy().Path {
+			r.syncParent(result, txid)
+		} else {
+			result.Finalize(false)
+		}
+	}
+
+	r.node.GetRoot().ExecuteCallbacks()
+
+	return result
+}
+
+// Add creates a new object at the given path with the provided data
+func (r *root) Add(ctx context.Context, path string, data interface{}, txid string, makeBranch MakeBranchFunction) Revision {
+	var result Revision
+
+	if makeBranch != nil {
+		// TODO: raise error
+	}
+
+	if r.hasCallbacks() {
+		// TODO: raise error
+	}
+
+	if txid != "" {
+		trackDirty := func(node *node) *Branch {
+			r.DirtyNodes[txid] = append(r.DirtyNodes[txid], node)
+			return node.MakeBranch(txid)
+		}
+		result = r.node.Add(ctx, path, data, txid, trackDirty)
+	} else {
+		result = r.node.Add(ctx, path, data, "", nil)
+	}
+
+	if result != nil {
+		result.Finalize(true)
+		r.node.GetRoot().ExecuteCallbacks()
+	}
+	return result
+}
+
+// Remove discards an object at a given path
+func (r *root) Remove(ctx context.Context, path string, txid string, makeBranch MakeBranchFunction) Revision {
+	var result Revision
+
+	if makeBranch != nil {
+		// TODO: raise error
+	}
+
+	if r.hasCallbacks() {
+		// TODO: raise error
+	}
+
+	if txid != "" {
+		trackDirty := func(node *node) *Branch {
+			r.DirtyNodes[txid] = append(r.DirtyNodes[txid], node)
+			return node.MakeBranch(txid)
+		}
+		result = r.node.Remove(ctx, path, txid, trackDirty)
+	} else {
+		result = r.node.Remove(ctx, path, "", nil)
+	}
+
+	r.node.GetRoot().ExecuteCallbacks()
+
+	return result
+}
+
+// MakeLatest updates a branch with the latest node revision
+func (r *root) MakeLatest(branch *Branch, revision Revision, changeAnnouncement []ChangeTuple) {
+	r.makeLatest(branch, revision, changeAnnouncement)
+}
+
+func (r *root) MakeRevision(branch *Branch, data interface{}, children map[string][]Revision) Revision {
+	if r.RevisionClass.(reflect.Type) == reflect.TypeOf(PersistedRevision{}) {
+		return NewPersistedRevision(branch, data, children)
+	}
+
+	return NewNonPersistedRevision(r, branch, data, children)
+}
+
+func (r *root) makeLatest(branch *Branch, revision Revision, changeAnnouncement []ChangeTuple) {
+	r.node.makeLatest(branch, revision, changeAnnouncement)
+
+	if r.KvStore != nil && branch.Txid == "" {
+		tags := make(map[string]string)
+		for k, v := range r.node.Tags {
+			tags[k] = v.GetHash()
+		}
+		data := &rootData{
+			Latest: branch.GetLatest().GetHash(),
+			Tags:   tags,
+		}
+		if blob, err := json.Marshal(data); err != nil {
+			// TODO report error
+		} else {
+			log.Debugf("Changing root to : %s", string(blob))
+			if err := r.KvStore.Put("root", blob); err != nil {
+				log.Errorf("failed to properly put value in kvstore - err: %s", err.Error())
+			}
+		}
+	}
+}
+
+type rootData struct {
+	Latest string            `json:"latest"`
+	Tags   map[string]string `json:"tags"`
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/transaction.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/transaction.go
new file mode 100644
index 0000000..5bef77e
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/transaction.go
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package model
+
+import (
+	"context"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+)
+
+type Transaction struct {
+	proxy *Proxy
+	txid  string
+}
+
+func NewTransaction(proxy *Proxy, txid string) *Transaction {
+	tx := &Transaction{
+		proxy: proxy,
+		txid:  txid,
+	}
+	return tx
+}
+func (t *Transaction) Get(ctx context.Context, path string, depth int, deep bool) interface{} {
+	if t.txid == "" {
+		log.Errorf("closed transaction")
+		return nil
+	}
+	// TODO: need to review the return values at the different layers!!!!!
+	return t.proxy.Get(ctx, path, depth, deep, t.txid)
+}
+func (t *Transaction) Update(ctx context.Context, path string, data interface{}, strict bool) interface{} {
+	if t.txid == "" {
+		log.Errorf("closed transaction")
+		return nil
+	}
+	return t.proxy.Update(ctx, path, data, strict, t.txid)
+}
+func (t *Transaction) Add(ctx context.Context, path string, data interface{}) interface{} {
+	if t.txid == "" {
+		log.Errorf("closed transaction")
+		return nil
+	}
+	return t.proxy.Add(ctx, path, data, t.txid)
+}
+func (t *Transaction) Remove(ctx context.Context, path string) interface{} {
+	if t.txid == "" {
+		log.Errorf("closed transaction")
+		return nil
+	}
+	return t.proxy.Remove(ctx, path, t.txid)
+}
+func (t *Transaction) Cancel() {
+	t.proxy.cancelTransaction(t.txid)
+	t.txid = ""
+}
+func (t *Transaction) Commit() {
+	t.proxy.commitTransaction(t.txid)
+	t.txid = ""
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/utils.go b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/utils.go
new file mode 100644
index 0000000..b28e92f
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/db/model/utils.go
@@ -0,0 +1,275 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package model
+
+import (
+	"bytes"
+	"encoding/gob"
+	"reflect"
+	"strings"
+)
+
+// IsProtoMessage determines if the specified implements proto.Message type
+func IsProtoMessage(object interface{}) bool {
+	var ok = false
+
+	if object != nil {
+		st := reflect.TypeOf(object)
+		_, ok = st.MethodByName("ProtoMessage")
+	}
+	return ok
+}
+
+// FindOwnerType will traverse a data structure and find the parent type of the specified object
+func FindOwnerType(obj reflect.Value, name string, depth int, found bool) reflect.Type {
+	prefix := ""
+	for d := 0; d < depth; d++ {
+		prefix += ">>"
+	}
+	k := obj.Kind()
+	switch k {
+	case reflect.Ptr:
+		if found {
+			return obj.Type()
+		}
+
+		t := obj.Type().Elem()
+		n := reflect.New(t)
+
+		if rc := FindOwnerType(n.Elem(), name, depth+1, found); rc != nil {
+			return rc
+		}
+
+	case reflect.Struct:
+		if found {
+			return obj.Type()
+		}
+
+		for i := 0; i < obj.NumField(); i++ {
+			v := reflect.Indirect(obj)
+
+			json := strings.Split(v.Type().Field(i).Tag.Get("json"), ",")
+
+			if json[0] == name {
+				return FindOwnerType(obj.Field(i), name, depth+1, true)
+			}
+
+			if rc := FindOwnerType(obj.Field(i), name, depth+1, found); rc != nil {
+				return rc
+			}
+		}
+	case reflect.Slice:
+		s := reflect.MakeSlice(obj.Type(), 1, 1)
+		n := reflect.New(obj.Type())
+		n.Elem().Set(s)
+
+		for i := 0; i < n.Elem().Len(); i++ {
+			if found {
+				return reflect.ValueOf(n.Elem().Index(i).Interface()).Type()
+			}
+		}
+
+		for i := 0; i < obj.Len(); i++ {
+			if found {
+				return obj.Index(i).Type()
+			}
+
+			if rc := FindOwnerType(obj.Index(i), name, depth+1, found); rc != nil {
+				return rc
+			}
+		}
+	default:
+		//log.Debugf("%s Unhandled <%+v> ... It's a %+v\n", prefix, obj, k)
+	}
+
+	return nil
+}
+
+// FindKeyOwner will traverse a structure to find the owner type of the specified name
+func FindKeyOwner(iface interface{}, name string, depth int) interface{} {
+	obj := reflect.ValueOf(iface)
+	k := obj.Kind()
+	switch k {
+	case reflect.Ptr:
+		t := obj.Type().Elem()
+		n := reflect.New(t)
+
+		if rc := FindKeyOwner(n.Elem().Interface(), name, depth+1); rc != nil {
+			return rc
+		}
+
+	case reflect.Struct:
+		for i := 0; i < obj.NumField(); i++ {
+			json := strings.Split(obj.Type().Field(i).Tag.Get("json"), ",")
+
+			if json[0] == name {
+				return obj.Type().Field(i).Type
+			}
+
+			if rc := FindKeyOwner(obj.Field(i).Interface(), name, depth+1); rc != nil {
+				return rc
+			}
+		}
+
+	case reflect.Slice:
+		s := reflect.MakeSlice(obj.Type(), 1, 1)
+		n := reflect.New(obj.Type())
+		n.Elem().Set(s)
+
+		for i := 0; i < n.Elem().Len(); i++ {
+			if rc := FindKeyOwner(n.Elem().Index(i).Interface(), name, depth+1); rc != nil {
+				return rc
+			}
+		}
+	default:
+		//log.Debugf("%s Unhandled <%+v> ... It's a %+v\n", prefix, obj, k)
+	}
+
+	return nil
+}
+
+// GetAttributeValue traverse a structure to find the value of an attribute
+// FIXME: Need to figure out if GetAttributeValue and GetAttributeStructure can become one
+// Code is repeated in both, but outputs have a different purpose
+// Left as-is for now to get things working
+func GetAttributeValue(data interface{}, name string, depth int) (string, reflect.Value) {
+	var attribName string
+	var attribValue reflect.Value
+	obj := reflect.ValueOf(data)
+
+	if !obj.IsValid() {
+		return attribName, attribValue
+	}
+
+	k := obj.Kind()
+	switch k {
+	case reflect.Ptr:
+		if obj.IsNil() {
+			return attribName, attribValue
+		}
+
+		if attribName, attribValue = GetAttributeValue(obj.Elem().Interface(), name, depth+1); attribValue.IsValid() {
+			return attribName, attribValue
+		}
+
+	case reflect.Struct:
+		for i := 0; i < obj.NumField(); i++ {
+			json := strings.Split(obj.Type().Field(i).Tag.Get("json"), ",")
+
+			if json[0] == name {
+				return obj.Type().Field(i).Name, obj.Field(i)
+			}
+
+			if obj.Field(i).IsValid() {
+				if attribName, attribValue = GetAttributeValue(obj.Field(i).Interface(), name, depth+1); attribValue.IsValid() {
+					return attribName, attribValue
+				}
+			}
+		}
+
+	case reflect.Slice:
+		s := reflect.MakeSlice(obj.Type(), 1, 1)
+		n := reflect.New(obj.Type())
+		n.Elem().Set(s)
+
+		for i := 0; i < obj.Len(); i++ {
+			if attribName, attribValue = GetAttributeValue(obj.Index(i).Interface(), name, depth+1); attribValue.IsValid() {
+				return attribName, attribValue
+			}
+		}
+	default:
+		//log.Debugf("%s Unhandled <%+v> ... It's a %+v\n", prefix, obj, k)
+	}
+
+	return attribName, attribValue
+
+}
+
+// GetAttributeStructure will traverse a structure to find the data structure for the named attribute
+// FIXME: See GetAttributeValue(...) comment
+func GetAttributeStructure(data interface{}, name string, depth int) reflect.StructField {
+	var result reflect.StructField
+	obj := reflect.ValueOf(data)
+
+	if !obj.IsValid() {
+		return result
+	}
+
+	k := obj.Kind()
+	switch k {
+	case reflect.Ptr:
+		t := obj.Type().Elem()
+		n := reflect.New(t)
+
+		if rc := GetAttributeStructure(n.Elem().Interface(), name, depth+1); rc.Name != "" {
+			return rc
+		}
+
+	case reflect.Struct:
+		for i := 0; i < obj.NumField(); i++ {
+			v := reflect.Indirect(obj)
+			json := strings.Split(obj.Type().Field(i).Tag.Get("json"), ",")
+
+			if json[0] == name {
+				return v.Type().Field(i)
+			}
+
+			if obj.Field(i).IsValid() {
+				if rc := GetAttributeStructure(obj.Field(i).Interface(), name, depth+1); rc.Name != "" {
+					return rc
+				}
+			}
+		}
+
+	case reflect.Slice:
+		s := reflect.MakeSlice(obj.Type(), 1, 1)
+		n := reflect.New(obj.Type())
+		n.Elem().Set(s)
+
+		for i := 0; i < obj.Len(); i++ {
+			if rc := GetAttributeStructure(obj.Index(i).Interface(), name, depth+1); rc.Name != "" {
+				return rc
+			}
+
+		}
+	default:
+		//log.Debugf("%s Unhandled <%+v> ... It's a %+v\n", prefix, obj, k)
+	}
+
+	return result
+
+}
+
+func clone2(a interface{}) interface{} {
+	b := reflect.ValueOf(a)
+	buff := new(bytes.Buffer)
+	enc := gob.NewEncoder(buff)
+	dec := gob.NewDecoder(buff)
+	enc.Encode(a)
+	dec.Decode(b.Elem().Interface())
+
+	return b.Interface()
+}
+
+func clone(a, b interface{}) interface{} {
+	buff := new(bytes.Buffer)
+	enc := gob.NewEncoder(buff)
+	dec := gob.NewDecoder(buff)
+	enc.Encode(a)
+	dec.Decode(b)
+	return b
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/client.go b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/client.go
new file mode 100755
index 0000000..36c1ede
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/client.go
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kafka
+
+import (
+	"time"
+
+	ca "github.com/opencord/voltha-protos/go/inter_container"
+)
+
+const (
+	PartitionConsumer = iota
+	GroupCustomer     = iota
+)
+
+const (
+	OffsetNewest = -1
+	OffsetOldest = -2
+)
+
+const (
+	GroupIdKey = "groupId"
+	Offset     = "offset"
+)
+
+const (
+	DefaultKafkaHost                = "127.0.0.1"
+	DefaultKafkaPort                = 9092
+	DefaultGroupName                = "voltha"
+	DefaultSleepOnError             = 1
+	DefaultProducerFlushFrequency   = 10
+	DefaultProducerFlushMessages    = 10
+	DefaultProducerFlushMaxmessages = 100
+	DefaultProducerReturnSuccess    = true
+	DefaultProducerReturnErrors     = true
+	DefaultProducerRetryMax         = 3
+	DefaultProducerRetryBackoff     = time.Millisecond * 100
+	DefaultConsumerMaxwait          = 100
+	DefaultMaxProcessingTime        = 100
+	DefaultConsumerType             = PartitionConsumer
+	DefaultNumberPartitions         = 3
+	DefaultNumberReplicas           = 1
+	DefaultAutoCreateTopic          = false
+	DefaultMetadataMaxRetry         = 3
+)
+
+// MsgClient represents the set of APIs  a Kafka MsgClient must implement
+type Client interface {
+	Start() error
+	Stop()
+	CreateTopic(topic *Topic, numPartition int, repFactor int) error
+	DeleteTopic(topic *Topic) error
+	Subscribe(topic *Topic, kvArgs ...*KVArg) (<-chan *ca.InterContainerMessage, error)
+	UnSubscribe(topic *Topic, ch <-chan *ca.InterContainerMessage) error
+	Send(msg interface{}, topic *Topic, keys ...string) error
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/kafka_inter_container_library.go b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/kafka_inter_container_library.go
new file mode 100644
index 0000000..d2e0702
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/kafka_inter_container_library.go
@@ -0,0 +1,833 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kafka
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes"
+	"github.com/golang/protobuf/ptypes/any"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"reflect"
+	"strings"
+	"sync"
+	"time"
+)
+
+// Initialize the logger - gets the default until the main function setup the logger
+func init() {
+	log.AddPackage(log.JSON, log.DebugLevel, nil)
+}
+
+const (
+	DefaultMaxRetries     = 3
+	DefaultRequestTimeout = 10000 // 10000 milliseconds - to handle a wider latency range
+)
+
+const (
+	TransactionKey = "transactionID"
+	FromTopic      = "fromTopic"
+)
+
+var ErrorTransactionNotAcquired = errors.New("transaction-not-acquired")
+var ErrorTransactionInvalidId = errors.New("transaction-invalid-id")
+
+// requestHandlerChannel represents an interface associated with a channel.  Whenever, an event is
+// obtained from that channel, this interface is invoked.   This is used to handle
+// async requests into the Core via the kafka messaging bus
+type requestHandlerChannel struct {
+	requesthandlerInterface interface{}
+	ch                      <-chan *ic.InterContainerMessage
+}
+
+// transactionChannel represents a combination of a topic and a channel onto which a response received
+// on the kafka bus will be sent to
+type transactionChannel struct {
+	topic *Topic
+	ch    chan *ic.InterContainerMessage
+}
+
+// InterContainerProxy represents the messaging proxy
+type InterContainerProxy struct {
+	kafkaHost                      string
+	kafkaPort                      int
+	DefaultTopic                   *Topic
+	defaultRequestHandlerInterface interface{}
+	deviceDiscoveryTopic           *Topic
+	kafkaClient                    Client
+	doneCh                         chan int
+
+	// This map is used to map a topic to an interface and channel.   When a request is received
+	// on that channel (registered to the topic) then that interface is invoked.
+	topicToRequestHandlerChannelMap   map[string]*requestHandlerChannel
+	lockTopicRequestHandlerChannelMap sync.RWMutex
+
+	// This map is used to map a channel to a response topic.   This channel handles all responses on that
+	// channel for that topic and forward them to the appropriate consumers channel, using the
+	// transactionIdToChannelMap.
+	topicToResponseChannelMap   map[string]<-chan *ic.InterContainerMessage
+	lockTopicResponseChannelMap sync.RWMutex
+
+	// This map is used to map a transaction to a consumers channel.  This is used whenever a request has been
+	// sent out and we are waiting for a response.
+	transactionIdToChannelMap     map[string]*transactionChannel
+	lockTransactionIdToChannelMap sync.RWMutex
+}
+
+type InterContainerProxyOption func(*InterContainerProxy)
+
+func InterContainerHost(host string) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.kafkaHost = host
+	}
+}
+
+func InterContainerPort(port int) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.kafkaPort = port
+	}
+}
+
+func DefaultTopic(topic *Topic) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.DefaultTopic = topic
+	}
+}
+
+func DeviceDiscoveryTopic(topic *Topic) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.deviceDiscoveryTopic = topic
+	}
+}
+
+func RequestHandlerInterface(handler interface{}) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.defaultRequestHandlerInterface = handler
+	}
+}
+
+func MsgClient(client Client) InterContainerProxyOption {
+	return func(args *InterContainerProxy) {
+		args.kafkaClient = client
+	}
+}
+
+func NewInterContainerProxy(opts ...InterContainerProxyOption) (*InterContainerProxy, error) {
+	proxy := &InterContainerProxy{
+		kafkaHost: DefaultKafkaHost,
+		kafkaPort: DefaultKafkaPort,
+	}
+
+	for _, option := range opts {
+		option(proxy)
+	}
+
+	// Create the locks for all the maps
+	proxy.lockTopicRequestHandlerChannelMap = sync.RWMutex{}
+	proxy.lockTransactionIdToChannelMap = sync.RWMutex{}
+	proxy.lockTopicResponseChannelMap = sync.RWMutex{}
+
+	return proxy, nil
+}
+
+func (kp *InterContainerProxy) Start() error {
+	log.Info("Starting-Proxy")
+
+	// Kafka MsgClient should already have been created.  If not, output fatal error
+	if kp.kafkaClient == nil {
+		log.Fatal("kafka-client-not-set")
+	}
+
+	// Create the Done channel
+	kp.doneCh = make(chan int, 1)
+
+	// Start the kafka client
+	if err := kp.kafkaClient.Start(); err != nil {
+		log.Errorw("Cannot-create-kafka-proxy", log.Fields{"error": err})
+		return err
+	}
+
+	// Create the topic to response channel map
+	kp.topicToResponseChannelMap = make(map[string]<-chan *ic.InterContainerMessage)
+	//
+	// Create the transactionId to Channel Map
+	kp.transactionIdToChannelMap = make(map[string]*transactionChannel)
+
+	// Create the topic to request channel map
+	kp.topicToRequestHandlerChannelMap = make(map[string]*requestHandlerChannel)
+
+	return nil
+}
+
+func (kp *InterContainerProxy) Stop() {
+	log.Info("stopping-intercontainer-proxy")
+	kp.doneCh <- 1
+	// TODO : Perform cleanup
+	kp.kafkaClient.Stop()
+	//kp.deleteAllTopicRequestHandlerChannelMap()
+	//kp.deleteAllTopicResponseChannelMap()
+	//kp.deleteAllTransactionIdToChannelMap()
+}
+
+// DeviceDiscovered publish the discovered device onto the kafka messaging bus
+func (kp *InterContainerProxy) DeviceDiscovered(deviceId string, deviceType string, parentId string, publisher string) error {
+	log.Debugw("sending-device-discovery-msg", log.Fields{"deviceId": deviceId})
+	//	Simple validation
+	if deviceId == "" || deviceType == "" {
+		log.Errorw("invalid-parameters", log.Fields{"id": deviceId, "type": deviceType})
+		return errors.New("invalid-parameters")
+	}
+	//	Create the device discovery message
+	header := &ic.Header{
+		Id:        uuid.New().String(),
+		Type:      ic.MessageType_DEVICE_DISCOVERED,
+		FromTopic: kp.DefaultTopic.Name,
+		ToTopic:   kp.deviceDiscoveryTopic.Name,
+		Timestamp: time.Now().UnixNano(),
+	}
+	body := &ic.DeviceDiscovered{
+		Id:         deviceId,
+		DeviceType: deviceType,
+		ParentId:   parentId,
+		Publisher:  publisher,
+	}
+
+	var marshalledData *any.Any
+	var err error
+	if marshalledData, err = ptypes.MarshalAny(body); err != nil {
+		log.Errorw("cannot-marshal-request", log.Fields{"error": err})
+		return err
+	}
+	msg := &ic.InterContainerMessage{
+		Header: header,
+		Body:   marshalledData,
+	}
+
+	// Send the message
+	if err := kp.kafkaClient.Send(msg, kp.deviceDiscoveryTopic); err != nil {
+		log.Errorw("cannot-send-device-discovery-message", log.Fields{"error": err})
+		return err
+	}
+	return nil
+}
+
+// InvokeRPC is used to send a request to a given topic
+func (kp *InterContainerProxy) InvokeRPC(ctx context.Context, rpc string, toTopic *Topic, replyToTopic *Topic,
+	waitForResponse bool, key string, kvArgs ...*KVArg) (bool, *any.Any) {
+
+	//	If a replyToTopic is provided then we use it, otherwise just use the  default toTopic.  The replyToTopic is
+	// typically the device ID.
+	responseTopic := replyToTopic
+	if responseTopic == nil {
+		responseTopic = kp.DefaultTopic
+	}
+
+	// Encode the request
+	protoRequest, err := encodeRequest(rpc, toTopic, responseTopic, key, kvArgs...)
+	if err != nil {
+		log.Warnw("cannot-format-request", log.Fields{"rpc": rpc, "error": err})
+		return false, nil
+	}
+
+	// Subscribe for response, if needed, before sending request
+	var ch <-chan *ic.InterContainerMessage
+	if waitForResponse {
+		var err error
+		if ch, err = kp.subscribeForResponse(*responseTopic, protoRequest.Header.Id); err != nil {
+			log.Errorw("failed-to-subscribe-for-response", log.Fields{"error": err, "toTopic": toTopic.Name})
+		}
+	}
+
+	// Send request - if the topic is formatted with a device Id then we will send the request using a
+	// specific key, hence ensuring a single partition is used to publish the request.  This ensures that the
+	// subscriber on that topic will receive the request in the order it was sent.  The key used is the deviceId.
+	//key := GetDeviceIdFromTopic(*toTopic)
+	log.Debugw("sending-msg", log.Fields{"rpc": rpc, "toTopic": toTopic, "replyTopic": responseTopic, "key": key, "xId": protoRequest.Header.Id})
+	go kp.kafkaClient.Send(protoRequest, toTopic, key)
+
+	if waitForResponse {
+		// Create a child context based on the parent context, if any
+		var cancel context.CancelFunc
+		childCtx := context.Background()
+		if ctx == nil {
+			ctx, cancel = context.WithTimeout(context.Background(), DefaultRequestTimeout*time.Millisecond)
+		} else {
+			childCtx, cancel = context.WithTimeout(ctx, DefaultRequestTimeout*time.Millisecond)
+		}
+		defer cancel()
+
+		// Wait for response as well as timeout or cancellation
+		// Remove the subscription for a response on return
+		defer kp.unSubscribeForResponse(protoRequest.Header.Id)
+		select {
+		case msg, ok := <-ch:
+			if !ok {
+				log.Warnw("channel-closed", log.Fields{"rpc": rpc, "replyTopic": replyToTopic.Name})
+				protoError := &ic.Error{Reason: "channel-closed"}
+				var marshalledArg *any.Any
+				if marshalledArg, err = ptypes.MarshalAny(protoError); err != nil {
+					return false, nil // Should never happen
+				}
+				return false, marshalledArg
+			}
+			log.Debugw("received-response", log.Fields{"rpc": rpc, "msgHeader": msg.Header})
+			var responseBody *ic.InterContainerResponseBody
+			var err error
+			if responseBody, err = decodeResponse(msg); err != nil {
+				log.Errorw("decode-response-error", log.Fields{"error": err})
+			}
+			return responseBody.Success, responseBody.Result
+		case <-ctx.Done():
+			log.Debugw("context-cancelled", log.Fields{"rpc": rpc, "ctx": ctx.Err()})
+			//	 pack the error as proto any type
+			protoError := &ic.Error{Reason: ctx.Err().Error()}
+			var marshalledArg *any.Any
+			if marshalledArg, err = ptypes.MarshalAny(protoError); err != nil {
+				return false, nil // Should never happen
+			}
+			return false, marshalledArg
+		case <-childCtx.Done():
+			log.Debugw("context-cancelled", log.Fields{"rpc": rpc, "ctx": childCtx.Err()})
+			//	 pack the error as proto any type
+			protoError := &ic.Error{Reason: childCtx.Err().Error()}
+			var marshalledArg *any.Any
+			if marshalledArg, err = ptypes.MarshalAny(protoError); err != nil {
+				return false, nil // Should never happen
+			}
+			return false, marshalledArg
+		case <-kp.doneCh:
+			log.Infow("received-exit-signal", log.Fields{"toTopic": toTopic.Name, "rpc": rpc})
+			return true, nil
+		}
+	}
+	return true, nil
+}
+
+// SubscribeWithRequestHandlerInterface allows a caller to assign a target object to be invoked automatically
+// when a message is received on a given topic
+func (kp *InterContainerProxy) SubscribeWithRequestHandlerInterface(topic Topic, handler interface{}) error {
+
+	// Subscribe to receive messages for that topic
+	var ch <-chan *ic.InterContainerMessage
+	var err error
+	if ch, err = kp.kafkaClient.Subscribe(&topic); err != nil {
+		//if ch, err = kp.Subscribe(topic); err != nil {
+		log.Errorw("failed-to-subscribe", log.Fields{"error": err, "topic": topic.Name})
+		return err
+	}
+
+	kp.defaultRequestHandlerInterface = handler
+	kp.addToTopicRequestHandlerChannelMap(topic.Name, &requestHandlerChannel{requesthandlerInterface: handler, ch: ch})
+	// Launch a go routine to receive and process kafka messages
+	go kp.waitForMessages(ch, topic, handler)
+
+	return nil
+}
+
+// SubscribeWithDefaultRequestHandler allows a caller to add a topic to an existing target object to be invoked automatically
+// when a message is received on a given topic.  So far there is only 1 target registered per microservice
+func (kp *InterContainerProxy) SubscribeWithDefaultRequestHandler(topic Topic, initialOffset int64) error {
+	// Subscribe to receive messages for that topic
+	var ch <-chan *ic.InterContainerMessage
+	var err error
+	if ch, err = kp.kafkaClient.Subscribe(&topic, &KVArg{Key: Offset, Value: initialOffset}); err != nil {
+		log.Errorw("failed-to-subscribe", log.Fields{"error": err, "topic": topic.Name})
+		return err
+	}
+	kp.addToTopicRequestHandlerChannelMap(topic.Name, &requestHandlerChannel{requesthandlerInterface: kp.defaultRequestHandlerInterface, ch: ch})
+
+	// Launch a go routine to receive and process kafka messages
+	go kp.waitForMessages(ch, topic, kp.defaultRequestHandlerInterface)
+
+	return nil
+}
+
+func (kp *InterContainerProxy) UnSubscribeFromRequestHandler(topic Topic) error {
+	return kp.deleteFromTopicRequestHandlerChannelMap(topic.Name)
+}
+
+// setupTopicResponseChannelMap sets up single consumers channel that will act as a broadcast channel for all
+// responses from that topic.
+func (kp *InterContainerProxy) setupTopicResponseChannelMap(topic string, arg <-chan *ic.InterContainerMessage) {
+	kp.lockTopicResponseChannelMap.Lock()
+	defer kp.lockTopicResponseChannelMap.Unlock()
+	if _, exist := kp.topicToResponseChannelMap[topic]; !exist {
+		kp.topicToResponseChannelMap[topic] = arg
+	}
+}
+
+func (kp *InterContainerProxy) isTopicSubscribedForResponse(topic string) bool {
+	kp.lockTopicResponseChannelMap.RLock()
+	defer kp.lockTopicResponseChannelMap.RUnlock()
+	_, exist := kp.topicToResponseChannelMap[topic]
+	return exist
+}
+
+func (kp *InterContainerProxy) deleteFromTopicResponseChannelMap(topic string) error {
+	kp.lockTopicResponseChannelMap.Lock()
+	defer kp.lockTopicResponseChannelMap.Unlock()
+	if _, exist := kp.topicToResponseChannelMap[topic]; exist {
+		// Unsubscribe to this topic first - this will close the subscribed channel
+		var err error
+		if err = kp.kafkaClient.UnSubscribe(&Topic{Name: topic}, kp.topicToResponseChannelMap[topic]); err != nil {
+			log.Errorw("unsubscribing-error", log.Fields{"topic": topic})
+		}
+		delete(kp.topicToResponseChannelMap, topic)
+		return err
+	} else {
+		return errors.New(fmt.Sprintf("%s-Topic-not-found", topic))
+	}
+}
+
+func (kp *InterContainerProxy) deleteAllTopicResponseChannelMap() error {
+	kp.lockTopicResponseChannelMap.Lock()
+	defer kp.lockTopicResponseChannelMap.Unlock()
+	var err error
+	for topic, _ := range kp.topicToResponseChannelMap {
+		// Unsubscribe to this topic first - this will close the subscribed channel
+		if err = kp.kafkaClient.UnSubscribe(&Topic{Name: topic}, kp.topicToResponseChannelMap[topic]); err != nil {
+			log.Errorw("unsubscribing-error", log.Fields{"topic": topic, "error": err})
+		}
+		delete(kp.topicToResponseChannelMap, topic)
+	}
+	return err
+}
+
+func (kp *InterContainerProxy) addToTopicRequestHandlerChannelMap(topic string, arg *requestHandlerChannel) {
+	kp.lockTopicRequestHandlerChannelMap.Lock()
+	defer kp.lockTopicRequestHandlerChannelMap.Unlock()
+	if _, exist := kp.topicToRequestHandlerChannelMap[topic]; !exist {
+		kp.topicToRequestHandlerChannelMap[topic] = arg
+	}
+}
+
+func (kp *InterContainerProxy) deleteFromTopicRequestHandlerChannelMap(topic string) error {
+	kp.lockTopicRequestHandlerChannelMap.Lock()
+	defer kp.lockTopicRequestHandlerChannelMap.Unlock()
+	if _, exist := kp.topicToRequestHandlerChannelMap[topic]; exist {
+		// Close the kafka client client first by unsubscribing to this topic
+		kp.kafkaClient.UnSubscribe(&Topic{Name: topic}, kp.topicToRequestHandlerChannelMap[topic].ch)
+		delete(kp.topicToRequestHandlerChannelMap, topic)
+		return nil
+	} else {
+		return errors.New(fmt.Sprintf("%s-Topic-not-found", topic))
+	}
+}
+
+func (kp *InterContainerProxy) deleteAllTopicRequestHandlerChannelMap() error {
+	kp.lockTopicRequestHandlerChannelMap.Lock()
+	defer kp.lockTopicRequestHandlerChannelMap.Unlock()
+	var err error
+	for topic, _ := range kp.topicToRequestHandlerChannelMap {
+		// Close the kafka client client first by unsubscribing to this topic
+		if err = kp.kafkaClient.UnSubscribe(&Topic{Name: topic}, kp.topicToRequestHandlerChannelMap[topic].ch); err != nil {
+			log.Errorw("unsubscribing-error", log.Fields{"topic": topic, "error": err})
+		}
+		delete(kp.topicToRequestHandlerChannelMap, topic)
+	}
+	return err
+}
+
+func (kp *InterContainerProxy) addToTransactionIdToChannelMap(id string, topic *Topic, arg chan *ic.InterContainerMessage) {
+	kp.lockTransactionIdToChannelMap.Lock()
+	defer kp.lockTransactionIdToChannelMap.Unlock()
+	if _, exist := kp.transactionIdToChannelMap[id]; !exist {
+		kp.transactionIdToChannelMap[id] = &transactionChannel{topic: topic, ch: arg}
+	}
+}
+
+func (kp *InterContainerProxy) deleteFromTransactionIdToChannelMap(id string) {
+	kp.lockTransactionIdToChannelMap.Lock()
+	defer kp.lockTransactionIdToChannelMap.Unlock()
+	if transChannel, exist := kp.transactionIdToChannelMap[id]; exist {
+		// Close the channel first
+		close(transChannel.ch)
+		delete(kp.transactionIdToChannelMap, id)
+	}
+}
+
+func (kp *InterContainerProxy) deleteTopicTransactionIdToChannelMap(id string) {
+	kp.lockTransactionIdToChannelMap.Lock()
+	defer kp.lockTransactionIdToChannelMap.Unlock()
+	for key, value := range kp.transactionIdToChannelMap {
+		if value.topic.Name == id {
+			close(value.ch)
+			delete(kp.transactionIdToChannelMap, key)
+		}
+	}
+}
+
+func (kp *InterContainerProxy) deleteAllTransactionIdToChannelMap() {
+	kp.lockTransactionIdToChannelMap.Lock()
+	defer kp.lockTransactionIdToChannelMap.Unlock()
+	for key, value := range kp.transactionIdToChannelMap {
+		close(value.ch)
+		delete(kp.transactionIdToChannelMap, key)
+	}
+}
+
+func (kp *InterContainerProxy) DeleteTopic(topic Topic) error {
+	// If we have any consumers on that topic we need to close them
+	if err := kp.deleteFromTopicResponseChannelMap(topic.Name); err != nil {
+		log.Errorw("delete-from-topic-responsechannelmap-failed", log.Fields{"error": err})
+	}
+	if err := kp.deleteFromTopicRequestHandlerChannelMap(topic.Name); err != nil {
+		log.Errorw("delete-from-topic-requesthandlerchannelmap-failed", log.Fields{"error": err})
+	}
+	kp.deleteTopicTransactionIdToChannelMap(topic.Name)
+
+	return kp.kafkaClient.DeleteTopic(&topic)
+}
+
+func encodeReturnedValue(returnedVal interface{}) (*any.Any, error) {
+	// Encode the response argument - needs to be a proto message
+	if returnedVal == nil {
+		return nil, nil
+	}
+	protoValue, ok := returnedVal.(proto.Message)
+	if !ok {
+		log.Warnw("response-value-not-proto-message", log.Fields{"error": ok, "returnVal": returnedVal})
+		err := errors.New("response-value-not-proto-message")
+		return nil, err
+	}
+
+	// Marshal the returned value, if any
+	var marshalledReturnedVal *any.Any
+	var err error
+	if marshalledReturnedVal, err = ptypes.MarshalAny(protoValue); err != nil {
+		log.Warnw("cannot-marshal-returned-val", log.Fields{"error": err})
+		return nil, err
+	}
+	return marshalledReturnedVal, nil
+}
+
+func encodeDefaultFailedResponse(request *ic.InterContainerMessage) *ic.InterContainerMessage {
+	responseHeader := &ic.Header{
+		Id:        request.Header.Id,
+		Type:      ic.MessageType_RESPONSE,
+		FromTopic: request.Header.ToTopic,
+		ToTopic:   request.Header.FromTopic,
+		Timestamp: time.Now().Unix(),
+	}
+	responseBody := &ic.InterContainerResponseBody{
+		Success: false,
+		Result:  nil,
+	}
+	var marshalledResponseBody *any.Any
+	var err error
+	// Error should never happen here
+	if marshalledResponseBody, err = ptypes.MarshalAny(responseBody); err != nil {
+		log.Warnw("cannot-marshal-failed-response-body", log.Fields{"error": err})
+	}
+
+	return &ic.InterContainerMessage{
+		Header: responseHeader,
+		Body:   marshalledResponseBody,
+	}
+
+}
+
+//formatRequest formats a request to send over kafka and returns an InterContainerMessage message on success
+//or an error on failure
+func encodeResponse(request *ic.InterContainerMessage, success bool, returnedValues ...interface{}) (*ic.InterContainerMessage, error) {
+	//log.Debugw("encodeResponse", log.Fields{"success": success, "returnedValues": returnedValues})
+	responseHeader := &ic.Header{
+		Id:        request.Header.Id,
+		Type:      ic.MessageType_RESPONSE,
+		FromTopic: request.Header.ToTopic,
+		ToTopic:   request.Header.FromTopic,
+		KeyTopic:  request.Header.KeyTopic,
+		Timestamp: time.Now().UnixNano(),
+	}
+
+	// Go over all returned values
+	var marshalledReturnedVal *any.Any
+	var err error
+	for _, returnVal := range returnedValues {
+		if marshalledReturnedVal, err = encodeReturnedValue(returnVal); err != nil {
+			log.Warnw("cannot-marshal-response-body", log.Fields{"error": err})
+		}
+		break // for now we support only 1 returned value - (excluding the error)
+	}
+
+	responseBody := &ic.InterContainerResponseBody{
+		Success: success,
+		Result:  marshalledReturnedVal,
+	}
+
+	// Marshal the response body
+	var marshalledResponseBody *any.Any
+	if marshalledResponseBody, err = ptypes.MarshalAny(responseBody); err != nil {
+		log.Warnw("cannot-marshal-response-body", log.Fields{"error": err})
+		return nil, err
+	}
+
+	return &ic.InterContainerMessage{
+		Header: responseHeader,
+		Body:   marshalledResponseBody,
+	}, nil
+}
+
+func CallFuncByName(myClass interface{}, funcName string, params ...interface{}) (out []reflect.Value, err error) {
+	myClassValue := reflect.ValueOf(myClass)
+	// Capitalize the first letter in the funcName to workaround the first capital letters required to
+	// invoke a function from a different package
+	funcName = strings.Title(funcName)
+	m := myClassValue.MethodByName(funcName)
+	if !m.IsValid() {
+		return make([]reflect.Value, 0), fmt.Errorf("method-not-found \"%s\"", funcName)
+	}
+	in := make([]reflect.Value, len(params))
+	for i, param := range params {
+		in[i] = reflect.ValueOf(param)
+	}
+	out = m.Call(in)
+	return
+}
+
+func (kp *InterContainerProxy) addTransactionId(transactionId string, currentArgs []*ic.Argument) []*ic.Argument {
+	arg := &KVArg{
+		Key:   TransactionKey,
+		Value: &ic.StrType{Val: transactionId},
+	}
+
+	var marshalledArg *any.Any
+	var err error
+	if marshalledArg, err = ptypes.MarshalAny(&ic.StrType{Val: transactionId}); err != nil {
+		log.Warnw("cannot-add-transactionId", log.Fields{"error": err})
+		return currentArgs
+	}
+	protoArg := &ic.Argument{
+		Key:   arg.Key,
+		Value: marshalledArg,
+	}
+	return append(currentArgs, protoArg)
+}
+
+func (kp *InterContainerProxy) addFromTopic(fromTopic string, currentArgs []*ic.Argument) []*ic.Argument {
+	var marshalledArg *any.Any
+	var err error
+	if marshalledArg, err = ptypes.MarshalAny(&ic.StrType{Val: fromTopic}); err != nil {
+		log.Warnw("cannot-add-transactionId", log.Fields{"error": err})
+		return currentArgs
+	}
+	protoArg := &ic.Argument{
+		Key:   FromTopic,
+		Value: marshalledArg,
+	}
+	return append(currentArgs, protoArg)
+}
+
+func (kp *InterContainerProxy) handleMessage(msg *ic.InterContainerMessage, targetInterface interface{}) {
+
+	// First extract the header to know whether this is a request - responses are handled by a different handler
+	if msg.Header.Type == ic.MessageType_REQUEST {
+		var out []reflect.Value
+		var err error
+
+		// Get the request body
+		requestBody := &ic.InterContainerRequestBody{}
+		if err = ptypes.UnmarshalAny(msg.Body, requestBody); err != nil {
+			log.Warnw("cannot-unmarshal-request", log.Fields{"error": err})
+		} else {
+			log.Debugw("received-request", log.Fields{"rpc": requestBody.Rpc, "header": msg.Header})
+			// let the callee unpack the arguments as its the only one that knows the real proto type
+			// Augment the requestBody with the message Id as it will be used in scenarios where cores
+			// are set in pairs and competing
+			requestBody.Args = kp.addTransactionId(msg.Header.Id, requestBody.Args)
+
+			// Augment the requestBody with the From topic name as it will be used in scenarios where a container
+			// needs to send an unsollicited message to the currently requested container
+			requestBody.Args = kp.addFromTopic(msg.Header.FromTopic, requestBody.Args)
+
+			out, err = CallFuncByName(targetInterface, requestBody.Rpc, requestBody.Args)
+			if err != nil {
+				log.Warn(err)
+			}
+		}
+		// Response required?
+		if requestBody.ResponseRequired {
+			// If we already have an error before then just return that
+			var returnError *ic.Error
+			var returnedValues []interface{}
+			var success bool
+			if err != nil {
+				returnError = &ic.Error{Reason: err.Error()}
+				returnedValues = make([]interface{}, 1)
+				returnedValues[0] = returnError
+			} else {
+				returnedValues = make([]interface{}, 0)
+				// Check for errors first
+				lastIndex := len(out) - 1
+				if out[lastIndex].Interface() != nil { // Error
+					if retError, ok := out[lastIndex].Interface().(error); ok {
+						if retError.Error() == ErrorTransactionNotAcquired.Error() {
+							log.Debugw("Ignoring request", log.Fields{"error": retError, "txId": msg.Header.Id})
+							return // Ignore - process is in competing mode and ignored transaction
+						}
+						returnError = &ic.Error{Reason: retError.Error()}
+						returnedValues = append(returnedValues, returnError)
+					} else { // Should never happen
+						returnError = &ic.Error{Reason: "incorrect-error-returns"}
+						returnedValues = append(returnedValues, returnError)
+					}
+				} else if len(out) == 2 && reflect.ValueOf(out[0].Interface()).IsValid() && reflect.ValueOf(out[0].Interface()).IsNil() {
+					log.Warnw("Unexpected response of (nil,nil)", log.Fields{"txId": msg.Header.Id})
+					return // Ignore - should not happen
+				} else { // Non-error case
+					success = true
+					for idx, val := range out {
+						//log.Debugw("returned-api-response-loop", log.Fields{"idx": idx, "val": val.Interface()})
+						if idx != lastIndex {
+							returnedValues = append(returnedValues, val.Interface())
+						}
+					}
+				}
+			}
+
+			var icm *ic.InterContainerMessage
+			if icm, err = encodeResponse(msg, success, returnedValues...); err != nil {
+				log.Warnw("error-encoding-response-returning-failure-result", log.Fields{"error": err})
+				icm = encodeDefaultFailedResponse(msg)
+			}
+			// To preserve ordering of messages, all messages to a given topic are sent to the same partition
+			// by providing a message key.   The key is encoded in the topic name.  If the deviceId is not
+			// present then the key will be empty, hence all messages for a given topic will be sent to all
+			// partitions.
+			replyTopic := &Topic{Name: msg.Header.FromTopic}
+			key := msg.Header.KeyTopic
+			log.Debugw("sending-response-to-kafka", log.Fields{"rpc": requestBody.Rpc, "header": icm.Header, "key": key})
+			// TODO: handle error response.
+			go kp.kafkaClient.Send(icm, replyTopic, key)
+		}
+	} else if msg.Header.Type == ic.MessageType_RESPONSE {
+		log.Debugw("response-received", log.Fields{"msg-header": msg.Header})
+		go kp.dispatchResponse(msg)
+	} else {
+		log.Warnw("unsupported-message-received", log.Fields{"msg-header": msg.Header})
+	}
+}
+
+func (kp *InterContainerProxy) waitForMessages(ch <-chan *ic.InterContainerMessage, topic Topic, targetInterface interface{}) {
+	//	Wait for messages
+	for msg := range ch {
+		//log.Debugw("request-received", log.Fields{"msg": msg, "topic": topic.Name, "target": targetInterface})
+		go kp.handleMessage(msg, targetInterface)
+	}
+}
+
+func (kp *InterContainerProxy) dispatchResponse(msg *ic.InterContainerMessage) {
+	kp.lockTransactionIdToChannelMap.RLock()
+	defer kp.lockTransactionIdToChannelMap.RUnlock()
+	if _, exist := kp.transactionIdToChannelMap[msg.Header.Id]; !exist {
+		log.Debugw("no-waiting-channel", log.Fields{"transaction": msg.Header.Id})
+		return
+	}
+	kp.transactionIdToChannelMap[msg.Header.Id].ch <- msg
+}
+
+// subscribeForResponse allows a caller to subscribe to a given topic when waiting for a response.
+// This method is built to prevent all subscribers to receive all messages as is the case of the Subscribe
+// API. There is one response channel waiting for kafka messages before dispatching the message to the
+// corresponding waiting channel
+func (kp *InterContainerProxy) subscribeForResponse(topic Topic, trnsId string) (chan *ic.InterContainerMessage, error) {
+	log.Debugw("subscribeForResponse", log.Fields{"topic": topic.Name, "trnsid": trnsId})
+
+	// Create a specific channel for this consumers.  We cannot use the channel from the kafkaclient as it will
+	// broadcast any message for this topic to all channels waiting on it.
+	ch := make(chan *ic.InterContainerMessage)
+	kp.addToTransactionIdToChannelMap(trnsId, &topic, ch)
+
+	return ch, nil
+}
+
+func (kp *InterContainerProxy) unSubscribeForResponse(trnsId string) error {
+	log.Debugw("unsubscribe-for-response", log.Fields{"trnsId": trnsId})
+	kp.deleteFromTransactionIdToChannelMap(trnsId)
+	return nil
+}
+
+//formatRequest formats a request to send over kafka and returns an InterContainerMessage message on success
+//or an error on failure
+func encodeRequest(rpc string, toTopic *Topic, replyTopic *Topic, key string, kvArgs ...*KVArg) (*ic.InterContainerMessage, error) {
+	requestHeader := &ic.Header{
+		Id:        uuid.New().String(),
+		Type:      ic.MessageType_REQUEST,
+		FromTopic: replyTopic.Name,
+		ToTopic:   toTopic.Name,
+		KeyTopic:  key,
+		Timestamp: time.Now().UnixNano(),
+	}
+	requestBody := &ic.InterContainerRequestBody{
+		Rpc:              rpc,
+		ResponseRequired: true,
+		ReplyToTopic:     replyTopic.Name,
+	}
+
+	for _, arg := range kvArgs {
+		if arg == nil {
+			// In case the caller sends an array with empty args
+			continue
+		}
+		var marshalledArg *any.Any
+		var err error
+		// ascertain the value interface type is a proto.Message
+		protoValue, ok := arg.Value.(proto.Message)
+		if !ok {
+			log.Warnw("argument-value-not-proto-message", log.Fields{"error": ok, "Value": arg.Value})
+			err := errors.New("argument-value-not-proto-message")
+			return nil, err
+		}
+		if marshalledArg, err = ptypes.MarshalAny(protoValue); err != nil {
+			log.Warnw("cannot-marshal-request", log.Fields{"error": err})
+			return nil, err
+		}
+		protoArg := &ic.Argument{
+			Key:   arg.Key,
+			Value: marshalledArg,
+		}
+		requestBody.Args = append(requestBody.Args, protoArg)
+	}
+
+	var marshalledData *any.Any
+	var err error
+	if marshalledData, err = ptypes.MarshalAny(requestBody); err != nil {
+		log.Warnw("cannot-marshal-request", log.Fields{"error": err})
+		return nil, err
+	}
+	request := &ic.InterContainerMessage{
+		Header: requestHeader,
+		Body:   marshalledData,
+	}
+	return request, nil
+}
+
+func decodeResponse(response *ic.InterContainerMessage) (*ic.InterContainerResponseBody, error) {
+	//	Extract the message body
+	responseBody := ic.InterContainerResponseBody{}
+	if err := ptypes.UnmarshalAny(response.Body, &responseBody); err != nil {
+		log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+		return nil, err
+	}
+	//log.Debugw("response-decoded-successfully", log.Fields{"response-status": &responseBody.Success})
+
+	return &responseBody, nil
+
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/sarama_client.go b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/sarama_client.go
new file mode 100755
index 0000000..cec18ec
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/sarama_client.go
@@ -0,0 +1,958 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kafka
+
+import (
+	"errors"
+	"fmt"
+	"github.com/Shopify/sarama"
+	scc "github.com/bsm/sarama-cluster"
+	"github.com/golang/protobuf/proto"
+	"github.com/google/uuid"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	ic "github.com/opencord/voltha-protos/go/inter_container"
+	"strings"
+	"sync"
+	"time"
+)
+
+func init() {
+	log.AddPackage(log.JSON, log.DebugLevel, nil)
+}
+
+type returnErrorFunction func() error
+
+// consumerChannels represents one or more consumers listening on a kafka topic.  Once a message is received on that
+// topic, the consumer(s) broadcasts the message to all the listening channels.   The consumer can be a partition
+//consumer or a group consumer
+type consumerChannels struct {
+	consumers []interface{}
+	channels  []chan *ic.InterContainerMessage
+}
+
+// SaramaClient represents the messaging proxy
+type SaramaClient struct {
+	cAdmin                        sarama.ClusterAdmin
+	client                        sarama.Client
+	KafkaHost                     string
+	KafkaPort                     int
+	producer                      sarama.AsyncProducer
+	consumer                      sarama.Consumer
+	groupConsumers                map[string]*scc.Consumer
+	lockOfGroupConsumers          sync.RWMutex
+	consumerGroupPrefix           string
+	consumerType                  int
+	consumerGroupName             string
+	producerFlushFrequency        int
+	producerFlushMessages         int
+	producerFlushMaxmessages      int
+	producerRetryMax              int
+	producerRetryBackOff          time.Duration
+	producerReturnSuccess         bool
+	producerReturnErrors          bool
+	consumerMaxwait               int
+	maxProcessingTime             int
+	numPartitions                 int
+	numReplicas                   int
+	autoCreateTopic               bool
+	doneCh                        chan int
+	topicToConsumerChannelMap     map[string]*consumerChannels
+	lockTopicToConsumerChannelMap sync.RWMutex
+	topicLockMap                  map[string]*sync.RWMutex
+	lockOfTopicLockMap            sync.RWMutex
+	metadataMaxRetry              int
+}
+
+type SaramaClientOption func(*SaramaClient)
+
+func Host(host string) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.KafkaHost = host
+	}
+}
+
+func Port(port int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.KafkaPort = port
+	}
+}
+
+func ConsumerGroupPrefix(prefix string) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.consumerGroupPrefix = prefix
+	}
+}
+
+func ConsumerGroupName(name string) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.consumerGroupName = name
+	}
+}
+
+func ConsumerType(consumer int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.consumerType = consumer
+	}
+}
+
+func ProducerFlushFrequency(frequency int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerFlushFrequency = frequency
+	}
+}
+
+func ProducerFlushMessages(num int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerFlushMessages = num
+	}
+}
+
+func ProducerFlushMaxMessages(num int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerFlushMaxmessages = num
+	}
+}
+
+func ProducerMaxRetries(num int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerRetryMax = num
+	}
+}
+
+func ProducerRetryBackoff(duration time.Duration) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerRetryBackOff = duration
+	}
+}
+
+func ProducerReturnOnErrors(opt bool) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerReturnErrors = opt
+	}
+}
+
+func ProducerReturnOnSuccess(opt bool) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.producerReturnSuccess = opt
+	}
+}
+
+func ConsumerMaxWait(wait int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.consumerMaxwait = wait
+	}
+}
+
+func MaxProcessingTime(pTime int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.maxProcessingTime = pTime
+	}
+}
+
+func NumPartitions(number int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.numPartitions = number
+	}
+}
+
+func NumReplicas(number int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.numReplicas = number
+	}
+}
+
+func AutoCreateTopic(opt bool) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.autoCreateTopic = opt
+	}
+}
+
+func MetadatMaxRetries(retry int) SaramaClientOption {
+	return func(args *SaramaClient) {
+		args.metadataMaxRetry = retry
+	}
+}
+
+func NewSaramaClient(opts ...SaramaClientOption) *SaramaClient {
+	client := &SaramaClient{
+		KafkaHost: DefaultKafkaHost,
+		KafkaPort: DefaultKafkaPort,
+	}
+	client.consumerType = DefaultConsumerType
+	client.producerFlushFrequency = DefaultProducerFlushFrequency
+	client.producerFlushMessages = DefaultProducerFlushMessages
+	client.producerFlushMaxmessages = DefaultProducerFlushMaxmessages
+	client.producerReturnErrors = DefaultProducerReturnErrors
+	client.producerReturnSuccess = DefaultProducerReturnSuccess
+	client.producerRetryMax = DefaultProducerRetryMax
+	client.producerRetryBackOff = DefaultProducerRetryBackoff
+	client.consumerMaxwait = DefaultConsumerMaxwait
+	client.maxProcessingTime = DefaultMaxProcessingTime
+	client.numPartitions = DefaultNumberPartitions
+	client.numReplicas = DefaultNumberReplicas
+	client.autoCreateTopic = DefaultAutoCreateTopic
+	client.metadataMaxRetry = DefaultMetadataMaxRetry
+
+	for _, option := range opts {
+		option(client)
+	}
+
+	client.groupConsumers = make(map[string]*scc.Consumer)
+
+	client.lockTopicToConsumerChannelMap = sync.RWMutex{}
+	client.topicLockMap = make(map[string]*sync.RWMutex)
+	client.lockOfTopicLockMap = sync.RWMutex{}
+	client.lockOfGroupConsumers = sync.RWMutex{}
+	return client
+}
+
+func (sc *SaramaClient) Start() error {
+	log.Info("Starting-kafka-sarama-client")
+
+	// Create the Done channel
+	sc.doneCh = make(chan int, 1)
+
+	var err error
+
+	// Add a cleanup in case of failure to startup
+	defer func() {
+		if err != nil {
+			sc.Stop()
+		}
+	}()
+
+	// Create the Cluster Admin
+	if err = sc.createClusterAdmin(); err != nil {
+		log.Errorw("Cannot-create-cluster-admin", log.Fields{"error": err})
+		return err
+	}
+
+	// Create the Publisher
+	if err := sc.createPublisher(); err != nil {
+		log.Errorw("Cannot-create-kafka-publisher", log.Fields{"error": err})
+		return err
+	}
+
+	if sc.consumerType == DefaultConsumerType {
+		// Create the master consumers
+		if err := sc.createConsumer(); err != nil {
+			log.Errorw("Cannot-create-kafka-consumers", log.Fields{"error": err})
+			return err
+		}
+	}
+
+	// Create the topic to consumers/channel map
+	sc.topicToConsumerChannelMap = make(map[string]*consumerChannels)
+
+	log.Info("kafka-sarama-client-started")
+
+	return nil
+}
+
+func (sc *SaramaClient) Stop() {
+	log.Info("stopping-sarama-client")
+
+	//Send a message over the done channel to close all long running routines
+	sc.doneCh <- 1
+
+	if sc.producer != nil {
+		if err := sc.producer.Close(); err != nil {
+			log.Errorw("closing-producer-failed", log.Fields{"error": err})
+		}
+	}
+
+	if sc.consumer != nil {
+		if err := sc.consumer.Close(); err != nil {
+			log.Errorw("closing-partition-consumer-failed", log.Fields{"error": err})
+		}
+	}
+
+	for key, val := range sc.groupConsumers {
+		log.Debugw("closing-group-consumer", log.Fields{"topic": key})
+		if err := val.Close(); err != nil {
+			log.Errorw("closing-group-consumer-failed", log.Fields{"error": err, "topic": key})
+		}
+	}
+
+	if sc.cAdmin != nil {
+		if err := sc.cAdmin.Close(); err != nil {
+			log.Errorw("closing-cluster-admin-failed", log.Fields{"error": err})
+		}
+	}
+
+	//TODO: Clear the consumers map
+	//sc.clearConsumerChannelMap()
+
+	log.Info("sarama-client-stopped")
+}
+
+//createTopic is an internal function to create a topic on the Kafka Broker. No locking is required as
+// the invoking function must hold the lock
+func (sc *SaramaClient) createTopic(topic *Topic, numPartition int, repFactor int) error {
+	// Set the topic details
+	topicDetail := &sarama.TopicDetail{}
+	topicDetail.NumPartitions = int32(numPartition)
+	topicDetail.ReplicationFactor = int16(repFactor)
+	topicDetail.ConfigEntries = make(map[string]*string)
+	topicDetails := make(map[string]*sarama.TopicDetail)
+	topicDetails[topic.Name] = topicDetail
+
+	if err := sc.cAdmin.CreateTopic(topic.Name, topicDetail, false); err != nil {
+		if err == sarama.ErrTopicAlreadyExists {
+			//	Not an error
+			log.Debugw("topic-already-exist", log.Fields{"topic": topic.Name})
+			return nil
+		}
+		log.Errorw("create-topic-failure", log.Fields{"error": err})
+		return err
+	}
+	// TODO: Wait until the topic has been created.  No API is available in the Sarama clusterAdmin to
+	// do so.
+	log.Debugw("topic-created", log.Fields{"topic": topic, "numPartition": numPartition, "replicationFactor": repFactor})
+	return nil
+}
+
+//CreateTopic is a public API to create a topic on the Kafka Broker.  It uses a lock on a specific topic to
+// ensure no two go routines are performing operations on the same topic
+func (sc *SaramaClient) CreateTopic(topic *Topic, numPartition int, repFactor int) error {
+	sc.lockTopic(topic)
+	defer sc.unLockTopic(topic)
+
+	return sc.createTopic(topic, numPartition, repFactor)
+}
+
+//DeleteTopic removes a topic from the kafka Broker
+func (sc *SaramaClient) DeleteTopic(topic *Topic) error {
+	sc.lockTopic(topic)
+	defer sc.unLockTopic(topic)
+
+	// Remove the topic from the broker
+	if err := sc.cAdmin.DeleteTopic(topic.Name); err != nil {
+		if err == sarama.ErrUnknownTopicOrPartition {
+			//	Not an error as does not exist
+			log.Debugw("topic-not-exist", log.Fields{"topic": topic.Name})
+			return nil
+		}
+		log.Errorw("delete-topic-failed", log.Fields{"topic": topic, "error": err})
+		return err
+	}
+
+	// Clear the topic from the consumer channel.  This will also close any consumers listening on that topic.
+	if err := sc.clearTopicFromConsumerChannelMap(*topic); err != nil {
+		log.Errorw("failure-clearing-channels", log.Fields{"topic": topic, "error": err})
+		return err
+	}
+	return nil
+}
+
+// Subscribe registers a caller to a topic. It returns a channel that the caller can use to receive
+// messages from that topic
+func (sc *SaramaClient) Subscribe(topic *Topic, kvArgs ...*KVArg) (<-chan *ic.InterContainerMessage, error) {
+	sc.lockTopic(topic)
+	defer sc.unLockTopic(topic)
+
+	log.Debugw("subscribe", log.Fields{"topic": topic.Name})
+
+	// If a consumers already exist for that topic then resuse it
+	if consumerCh := sc.getConsumerChannel(topic); consumerCh != nil {
+		log.Debugw("topic-already-subscribed", log.Fields{"topic": topic.Name})
+		// Create a channel specific for that consumers and add it to the consumers channel map
+		ch := make(chan *ic.InterContainerMessage)
+		sc.addChannelToConsumerChannelMap(topic, ch)
+		return ch, nil
+	}
+
+	// Register for the topic and set it up
+	var consumerListeningChannel chan *ic.InterContainerMessage
+	var err error
+
+	// Use the consumerType option to figure out the type of consumer to launch
+	if sc.consumerType == PartitionConsumer {
+		if sc.autoCreateTopic {
+			if err = sc.createTopic(topic, sc.numPartitions, sc.numReplicas); err != nil {
+				log.Errorw("create-topic-failure", log.Fields{"error": err, "topic": topic.Name})
+				return nil, err
+			}
+		}
+		if consumerListeningChannel, err = sc.setupPartitionConsumerChannel(topic, getOffset(kvArgs...)); err != nil {
+			log.Warnw("create-consumers-channel-failure", log.Fields{"error": err, "topic": topic.Name})
+			return nil, err
+		}
+	} else if sc.consumerType == GroupCustomer {
+		// TODO: create topic if auto create is on.  There is an issue with the sarama cluster library that
+		// does not consume from a precreated topic in some scenarios
+		//if sc.autoCreateTopic {
+		//	if err = sc.createTopic(topic, sc.numPartitions, sc.numReplicas); err != nil {
+		//		log.Errorw("create-topic-failure", log.Fields{"error": err, "topic": topic.Name})
+		//		return nil, err
+		//	}
+		//}
+		//groupId := sc.consumerGroupName
+		groupId := getGroupId(kvArgs...)
+		// Include the group prefix
+		if groupId != "" {
+			groupId = sc.consumerGroupPrefix + groupId
+		} else {
+			// Need to use a unique group Id per topic
+			groupId = sc.consumerGroupPrefix + topic.Name
+		}
+		if consumerListeningChannel, err = sc.setupGroupConsumerChannel(topic, groupId, getOffset(kvArgs...)); err != nil {
+			log.Warnw("create-consumers-channel-failure", log.Fields{"error": err, "topic": topic.Name, "groupId": groupId})
+			return nil, err
+		}
+
+	} else {
+		log.Warnw("unknown-consumer-type", log.Fields{"consumer-type": sc.consumerType})
+		return nil, errors.New("unknown-consumer-type")
+	}
+
+	return consumerListeningChannel, nil
+}
+
+//UnSubscribe unsubscribe a consumer from a given topic
+func (sc *SaramaClient) UnSubscribe(topic *Topic, ch <-chan *ic.InterContainerMessage) error {
+	sc.lockTopic(topic)
+	defer sc.unLockTopic(topic)
+
+	log.Debugw("unsubscribing-channel-from-topic", log.Fields{"topic": topic.Name})
+	var err error
+	if err = sc.removeChannelFromConsumerChannelMap(*topic, ch); err != nil {
+		log.Errorw("failed-removing-channel", log.Fields{"error": err})
+	}
+	if err = sc.deleteFromGroupConsumers(topic.Name); err != nil {
+		log.Errorw("failed-deleting-group-consumer", log.Fields{"error": err})
+	}
+	return err
+}
+
+// send formats and sends the request onto the kafka messaging bus.
+func (sc *SaramaClient) Send(msg interface{}, topic *Topic, keys ...string) error {
+
+	// Assert message is a proto message
+	var protoMsg proto.Message
+	var ok bool
+	// ascertain the value interface type is a proto.Message
+	if protoMsg, ok = msg.(proto.Message); !ok {
+		log.Warnw("message-not-proto-message", log.Fields{"msg": msg})
+		return errors.New(fmt.Sprintf("not-a-proto-msg-%s", msg))
+	}
+
+	var marshalled []byte
+	var err error
+	//	Create the Sarama producer message
+	if marshalled, err = proto.Marshal(protoMsg); err != nil {
+		log.Errorw("marshalling-failed", log.Fields{"msg": protoMsg, "error": err})
+		return err
+	}
+	key := ""
+	if len(keys) > 0 {
+		key = keys[0] // Only the first key is relevant
+	}
+	kafkaMsg := &sarama.ProducerMessage{
+		Topic: topic.Name,
+		Key:   sarama.StringEncoder(key),
+		Value: sarama.ByteEncoder(marshalled),
+	}
+
+	// Send message to kafka
+	sc.producer.Input() <- kafkaMsg
+	// Wait for result
+	// TODO: Use a lock or a different mechanism to ensure the response received corresponds to the message sent.
+	select {
+	case ok := <-sc.producer.Successes():
+		log.Debugw("message-sent", log.Fields{"status": ok.Topic})
+	case notOk := <-sc.producer.Errors():
+		log.Debugw("error-sending", log.Fields{"status": notOk})
+		return notOk
+	}
+	return nil
+}
+
+// getGroupId returns the group id from the key-value args.
+func getGroupId(kvArgs ...*KVArg) string {
+	for _, arg := range kvArgs {
+		if arg.Key == GroupIdKey {
+			return arg.Value.(string)
+		}
+	}
+	return ""
+}
+
+// getOffset returns the offset from the key-value args.
+func getOffset(kvArgs ...*KVArg) int64 {
+	for _, arg := range kvArgs {
+		if arg.Key == Offset {
+			return arg.Value.(int64)
+		}
+	}
+	return sarama.OffsetNewest
+}
+
+func (sc *SaramaClient) createClusterAdmin() error {
+	kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort)
+	config := sarama.NewConfig()
+	config.Version = sarama.V1_0_0_0
+
+	// Create a cluster Admin
+	var cAdmin sarama.ClusterAdmin
+	var err error
+	if cAdmin, err = sarama.NewClusterAdmin([]string{kafkaFullAddr}, config); err != nil {
+		log.Errorw("cluster-admin-failure", log.Fields{"error": err, "broker-address": kafkaFullAddr})
+		return err
+	}
+	sc.cAdmin = cAdmin
+	return nil
+}
+
+func (sc *SaramaClient) lockTopic(topic *Topic) {
+	sc.lockOfTopicLockMap.Lock()
+	if _, exist := sc.topicLockMap[topic.Name]; exist {
+		sc.lockOfTopicLockMap.Unlock()
+		sc.topicLockMap[topic.Name].Lock()
+	} else {
+		sc.topicLockMap[topic.Name] = &sync.RWMutex{}
+		sc.lockOfTopicLockMap.Unlock()
+		sc.topicLockMap[topic.Name].Lock()
+	}
+}
+
+func (sc *SaramaClient) unLockTopic(topic *Topic) {
+	sc.lockOfTopicLockMap.Lock()
+	defer sc.lockOfTopicLockMap.Unlock()
+	if _, exist := sc.topicLockMap[topic.Name]; exist {
+		sc.topicLockMap[topic.Name].Unlock()
+	}
+}
+
+func (sc *SaramaClient) addTopicToConsumerChannelMap(id string, arg *consumerChannels) {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	if _, exist := sc.topicToConsumerChannelMap[id]; !exist {
+		sc.topicToConsumerChannelMap[id] = arg
+	}
+}
+
+func (sc *SaramaClient) deleteFromTopicToConsumerChannelMap(id string) {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	if _, exist := sc.topicToConsumerChannelMap[id]; exist {
+		delete(sc.topicToConsumerChannelMap, id)
+	}
+}
+
+func (sc *SaramaClient) getConsumerChannel(topic *Topic) *consumerChannels {
+	sc.lockTopicToConsumerChannelMap.RLock()
+	defer sc.lockTopicToConsumerChannelMap.RUnlock()
+
+	if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist {
+		return consumerCh
+	}
+	return nil
+}
+
+func (sc *SaramaClient) addChannelToConsumerChannelMap(topic *Topic, ch chan *ic.InterContainerMessage) {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist {
+		consumerCh.channels = append(consumerCh.channels, ch)
+		return
+	}
+	log.Warnw("consumers-channel-not-exist", log.Fields{"topic": topic.Name})
+}
+
+//closeConsumers closes a list of sarama consumers.  The consumers can either be a partition consumers or a group consumers
+func closeConsumers(consumers []interface{}) error {
+	var err error
+	for _, consumer := range consumers {
+		//	Is it a partition consumers?
+		if partionConsumer, ok := consumer.(sarama.PartitionConsumer); ok {
+			if errTemp := partionConsumer.Close(); errTemp != nil {
+				log.Debugw("partition!!!", log.Fields{"err": errTemp})
+				if strings.Compare(errTemp.Error(), sarama.ErrUnknownTopicOrPartition.Error()) == 0 {
+					// This can occur on race condition
+					err = nil
+				} else {
+					err = errTemp
+				}
+			}
+		} else if groupConsumer, ok := consumer.(*scc.Consumer); ok {
+			if errTemp := groupConsumer.Close(); errTemp != nil {
+				if strings.Compare(errTemp.Error(), sarama.ErrUnknownTopicOrPartition.Error()) == 0 {
+					// This can occur on race condition
+					err = nil
+				} else {
+					err = errTemp
+				}
+			}
+		}
+	}
+	return err
+}
+
+func (sc *SaramaClient) removeChannelFromConsumerChannelMap(topic Topic, ch <-chan *ic.InterContainerMessage) error {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist {
+		// Channel will be closed in the removeChannel method
+		consumerCh.channels = removeChannel(consumerCh.channels, ch)
+		// If there are no more channels then we can close the consumers itself
+		if len(consumerCh.channels) == 0 {
+			log.Debugw("closing-consumers", log.Fields{"topic": topic})
+			err := closeConsumers(consumerCh.consumers)
+			//err := consumerCh.consumers.Close()
+			delete(sc.topicToConsumerChannelMap, topic.Name)
+			return err
+		}
+		return nil
+	}
+	log.Warnw("topic-does-not-exist", log.Fields{"topic": topic.Name})
+	return errors.New("topic-does-not-exist")
+}
+
+func (sc *SaramaClient) clearTopicFromConsumerChannelMap(topic Topic) error {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	if consumerCh, exist := sc.topicToConsumerChannelMap[topic.Name]; exist {
+		for _, ch := range consumerCh.channels {
+			// Channel will be closed in the removeChannel method
+			removeChannel(consumerCh.channels, ch)
+		}
+		err := closeConsumers(consumerCh.consumers)
+		//if err == sarama.ErrUnknownTopicOrPartition {
+		//	// Not an error
+		//	err = nil
+		//}
+		//err := consumerCh.consumers.Close()
+		delete(sc.topicToConsumerChannelMap, topic.Name)
+		return err
+	}
+	log.Debugw("topic-does-not-exist", log.Fields{"topic": topic.Name})
+	return nil
+}
+
+func (sc *SaramaClient) clearConsumerChannelMap() error {
+	sc.lockTopicToConsumerChannelMap.Lock()
+	defer sc.lockTopicToConsumerChannelMap.Unlock()
+	var err error
+	for topic, consumerCh := range sc.topicToConsumerChannelMap {
+		for _, ch := range consumerCh.channels {
+			// Channel will be closed in the removeChannel method
+			removeChannel(consumerCh.channels, ch)
+		}
+		if errTemp := closeConsumers(consumerCh.consumers); errTemp != nil {
+			err = errTemp
+		}
+		//err = consumerCh.consumers.Close()
+		delete(sc.topicToConsumerChannelMap, topic)
+	}
+	return err
+}
+
+//createPublisher creates the publisher which is used to send a message onto kafka
+func (sc *SaramaClient) createPublisher() error {
+	// This Creates the publisher
+	config := sarama.NewConfig()
+	config.Producer.Partitioner = sarama.NewRandomPartitioner
+	config.Producer.Flush.Frequency = time.Duration(sc.producerFlushFrequency)
+	config.Producer.Flush.Messages = sc.producerFlushMessages
+	config.Producer.Flush.MaxMessages = sc.producerFlushMaxmessages
+	config.Producer.Return.Errors = sc.producerReturnErrors
+	config.Producer.Return.Successes = sc.producerReturnSuccess
+	//config.Producer.RequiredAcks = sarama.WaitForAll
+	config.Producer.RequiredAcks = sarama.WaitForLocal
+
+	kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort)
+	brokers := []string{kafkaFullAddr}
+
+	if producer, err := sarama.NewAsyncProducer(brokers, config); err != nil {
+		log.Errorw("error-starting-publisher", log.Fields{"error": err})
+		return err
+	} else {
+		sc.producer = producer
+	}
+	log.Info("Kafka-publisher-created")
+	return nil
+}
+
+func (sc *SaramaClient) createConsumer() error {
+	config := sarama.NewConfig()
+	config.Consumer.Return.Errors = true
+	config.Consumer.Fetch.Min = 1
+	config.Consumer.MaxWaitTime = time.Duration(sc.consumerMaxwait) * time.Millisecond
+	config.Consumer.MaxProcessingTime = time.Duration(sc.maxProcessingTime) * time.Millisecond
+	config.Consumer.Offsets.Initial = sarama.OffsetNewest
+	config.Metadata.Retry.Max = sc.metadataMaxRetry
+	kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort)
+	brokers := []string{kafkaFullAddr}
+
+	if consumer, err := sarama.NewConsumer(brokers, config); err != nil {
+		log.Errorw("error-starting-consumers", log.Fields{"error": err})
+		return err
+	} else {
+		sc.consumer = consumer
+	}
+	log.Info("Kafka-consumers-created")
+	return nil
+}
+
+// createGroupConsumer creates a consumers group
+func (sc *SaramaClient) createGroupConsumer(topic *Topic, groupId string, initialOffset int64, retries int) (*scc.Consumer, error) {
+	config := scc.NewConfig()
+	config.ClientID = uuid.New().String()
+	config.Group.Mode = scc.ConsumerModeMultiplex
+	//config.Consumer.Return.Errors = true
+	//config.Group.Return.Notifications = false
+	//config.Consumer.MaxWaitTime = time.Duration(DefaultConsumerMaxwait) * time.Millisecond
+	//config.Consumer.MaxProcessingTime = time.Duration(DefaultMaxProcessingTime) * time.Millisecond
+	config.Consumer.Offsets.Initial = initialOffset
+	//config.Consumer.Offsets.Initial = sarama.OffsetOldest
+	kafkaFullAddr := fmt.Sprintf("%s:%d", sc.KafkaHost, sc.KafkaPort)
+	brokers := []string{kafkaFullAddr}
+
+	topics := []string{topic.Name}
+	var consumer *scc.Consumer
+	var err error
+
+	if consumer, err = scc.NewConsumer(brokers, groupId, topics, config); err != nil {
+		log.Errorw("create-group-consumers-failure", log.Fields{"error": err, "topic": topic.Name, "groupId": groupId})
+		return nil, err
+	}
+	log.Debugw("create-group-consumers-success", log.Fields{"topic": topic.Name, "groupId": groupId})
+
+	//sc.groupConsumers[topic.Name] = consumer
+	sc.addToGroupConsumers(topic.Name, consumer)
+	return consumer, nil
+}
+
+// dispatchToConsumers sends the intercontainermessage received on a given topic to all subscribers for that
+// topic via the unique channel each subscriber received during subscription
+func (sc *SaramaClient) dispatchToConsumers(consumerCh *consumerChannels, protoMessage *ic.InterContainerMessage) {
+	// Need to go over all channels and publish messages to them - do we need to copy msg?
+	sc.lockTopicToConsumerChannelMap.RLock()
+	defer sc.lockTopicToConsumerChannelMap.RUnlock()
+	for _, ch := range consumerCh.channels {
+		go func(c chan *ic.InterContainerMessage) {
+			c <- protoMessage
+		}(ch)
+	}
+}
+
+func (sc *SaramaClient) consumeFromAPartition(topic *Topic, consumer sarama.PartitionConsumer, consumerChnls *consumerChannels) {
+	log.Debugw("starting-partition-consumption-loop", log.Fields{"topic": topic.Name})
+startloop:
+	for {
+		select {
+		case err, ok := <-consumer.Errors():
+			if ok {
+				log.Warnw("partition-consumers-error", log.Fields{"error": err})
+			} else {
+				// Channel is closed
+				break startloop
+			}
+		case msg, ok := <-consumer.Messages():
+			//log.Debugw("message-received", log.Fields{"msg": msg, "receivedTopic": msg.Topic})
+			if !ok {
+				// channel is closed
+				break startloop
+			}
+			msgBody := msg.Value
+			icm := &ic.InterContainerMessage{}
+			if err := proto.Unmarshal(msgBody, icm); err != nil {
+				log.Warnw("partition-invalid-message", log.Fields{"error": err})
+				continue
+			}
+			go sc.dispatchToConsumers(consumerChnls, icm)
+		case <-sc.doneCh:
+			log.Infow("partition-received-exit-signal", log.Fields{"topic": topic.Name})
+			break startloop
+		}
+	}
+	log.Infow("partition-consumer-stopped", log.Fields{"topic": topic.Name})
+}
+
+func (sc *SaramaClient) consumeGroupMessages(topic *Topic, consumer *scc.Consumer, consumerChnls *consumerChannels) {
+	log.Debugw("starting-group-consumption-loop", log.Fields{"topic": topic.Name})
+
+startloop:
+	for {
+		select {
+		case err, ok := <-consumer.Errors():
+			if ok {
+				log.Warnw("group-consumers-error", log.Fields{"topic": topic.Name, "error": err})
+			} else {
+				// channel is closed
+				break startloop
+			}
+		case msg, ok := <-consumer.Messages():
+			if !ok {
+				// Channel closed
+				break startloop
+			}
+			log.Debugw("message-received", log.Fields{"timestamp": msg.Timestamp, "receivedTopic": msg.Topic})
+			msgBody := msg.Value
+			icm := &ic.InterContainerMessage{}
+			if err := proto.Unmarshal(msgBody, icm); err != nil {
+				log.Warnw("invalid-message", log.Fields{"error": err})
+				continue
+			}
+			go sc.dispatchToConsumers(consumerChnls, icm)
+			consumer.MarkOffset(msg, "")
+		case ntf := <-consumer.Notifications():
+			log.Debugw("group-received-notification", log.Fields{"notification": ntf})
+		case <-sc.doneCh:
+			log.Infow("group-received-exit-signal", log.Fields{"topic": topic.Name})
+			break startloop
+		}
+	}
+	log.Infow("group-consumer-stopped", log.Fields{"topic": topic.Name})
+}
+
+func (sc *SaramaClient) startConsumers(topic *Topic) error {
+	log.Debugw("starting-consumers", log.Fields{"topic": topic.Name})
+	var consumerCh *consumerChannels
+	if consumerCh = sc.getConsumerChannel(topic); consumerCh == nil {
+		log.Errorw("consumers-not-exist", log.Fields{"topic": topic.Name})
+		return errors.New("consumers-not-exist")
+	}
+	// For each consumer listening for that topic, start a consumption loop
+	for _, consumer := range consumerCh.consumers {
+		if pConsumer, ok := consumer.(sarama.PartitionConsumer); ok {
+			go sc.consumeFromAPartition(topic, pConsumer, consumerCh)
+		} else if gConsumer, ok := consumer.(*scc.Consumer); ok {
+			go sc.consumeGroupMessages(topic, gConsumer, consumerCh)
+		} else {
+			log.Errorw("invalid-consumer", log.Fields{"topic": topic})
+			return errors.New("invalid-consumer")
+		}
+	}
+	return nil
+}
+
+//// setupConsumerChannel creates a consumerChannels object for that topic and add it to the consumerChannels map
+//// for that topic.  It also starts the routine that listens for messages on that topic.
+func (sc *SaramaClient) setupPartitionConsumerChannel(topic *Topic, initialOffset int64) (chan *ic.InterContainerMessage, error) {
+	var pConsumers []sarama.PartitionConsumer
+	var err error
+
+	if pConsumers, err = sc.createPartitionConsumers(topic, initialOffset); err != nil {
+		log.Errorw("creating-partition-consumers-failure", log.Fields{"error": err, "topic": topic.Name})
+		return nil, err
+	}
+
+	consumersIf := make([]interface{}, 0)
+	for _, pConsumer := range pConsumers {
+		consumersIf = append(consumersIf, pConsumer)
+	}
+
+	// Create the consumers/channel structure and set the consumers and create a channel on that topic - for now
+	// unbuffered to verify race conditions.
+	consumerListeningChannel := make(chan *ic.InterContainerMessage)
+	cc := &consumerChannels{
+		consumers: consumersIf,
+		channels:  []chan *ic.InterContainerMessage{consumerListeningChannel},
+	}
+
+	// Add the consumers channel to the map
+	sc.addTopicToConsumerChannelMap(topic.Name, cc)
+
+	//Start a consumers to listen on that specific topic
+	go sc.startConsumers(topic)
+
+	return consumerListeningChannel, nil
+}
+
+// setupConsumerChannel creates a consumerChannels object for that topic and add it to the consumerChannels map
+// for that topic.  It also starts the routine that listens for messages on that topic.
+func (sc *SaramaClient) setupGroupConsumerChannel(topic *Topic, groupId string, initialOffset int64) (chan *ic.InterContainerMessage, error) {
+	// TODO:  Replace this development partition consumers with a group consumers
+	var pConsumer *scc.Consumer
+	var err error
+	if pConsumer, err = sc.createGroupConsumer(topic, groupId, initialOffset, DefaultMaxRetries); err != nil {
+		log.Errorw("creating-partition-consumers-failure", log.Fields{"error": err, "topic": topic.Name})
+		return nil, err
+	}
+	// Create the consumers/channel structure and set the consumers and create a channel on that topic - for now
+	// unbuffered to verify race conditions.
+	consumerListeningChannel := make(chan *ic.InterContainerMessage)
+	cc := &consumerChannels{
+		consumers: []interface{}{pConsumer},
+		channels:  []chan *ic.InterContainerMessage{consumerListeningChannel},
+	}
+
+	// Add the consumers channel to the map
+	sc.addTopicToConsumerChannelMap(topic.Name, cc)
+
+	//Start a consumers to listen on that specific topic
+	go sc.startConsumers(topic)
+
+	return consumerListeningChannel, nil
+}
+
+func (sc *SaramaClient) createPartitionConsumers(topic *Topic, initialOffset int64) ([]sarama.PartitionConsumer, error) {
+	log.Debugw("creating-partition-consumers", log.Fields{"topic": topic.Name})
+	partitionList, err := sc.consumer.Partitions(topic.Name)
+	if err != nil {
+		log.Warnw("get-partition-failure", log.Fields{"error": err, "topic": topic.Name})
+		return nil, err
+	}
+
+	pConsumers := make([]sarama.PartitionConsumer, 0)
+	for _, partition := range partitionList {
+		var pConsumer sarama.PartitionConsumer
+		if pConsumer, err = sc.consumer.ConsumePartition(topic.Name, partition, initialOffset); err != nil {
+			log.Warnw("consumers-partition-failure", log.Fields{"error": err, "topic": topic.Name})
+			return nil, err
+		}
+		pConsumers = append(pConsumers, pConsumer)
+	}
+	return pConsumers, nil
+}
+
+func removeChannel(channels []chan *ic.InterContainerMessage, ch <-chan *ic.InterContainerMessage) []chan *ic.InterContainerMessage {
+	var i int
+	var channel chan *ic.InterContainerMessage
+	for i, channel = range channels {
+		if channel == ch {
+			channels[len(channels)-1], channels[i] = channels[i], channels[len(channels)-1]
+			close(channel)
+			log.Debug("channel-closed")
+			return channels[:len(channels)-1]
+		}
+	}
+	return channels
+}
+
+func (sc *SaramaClient) addToGroupConsumers(topic string, consumer *scc.Consumer) {
+	sc.lockOfGroupConsumers.Lock()
+	defer sc.lockOfGroupConsumers.Unlock()
+	if _, exist := sc.groupConsumers[topic]; !exist {
+		sc.groupConsumers[topic] = consumer
+	}
+}
+
+func (sc *SaramaClient) deleteFromGroupConsumers(topic string) error {
+	sc.lockOfGroupConsumers.Lock()
+	defer sc.lockOfGroupConsumers.Unlock()
+	if _, exist := sc.groupConsumers[topic]; exist {
+		consumer := sc.groupConsumers[topic]
+		delete(sc.groupConsumers, topic)
+		if err := consumer.Close(); err != nil {
+			log.Errorw("failure-closing-consumer", log.Fields{"error": err})
+			return err
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/utils.go b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/utils.go
new file mode 100644
index 0000000..0cb9535
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/kafka/utils.go
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kafka
+
+import "strings"
+
+const (
+	TopicSeparator = "_"
+	DeviceIdLength = 24
+)
+
+// A Topic definition - may be augmented with additional attributes eventually
+type Topic struct {
+	// The name of the topic. It must start with a letter,
+	// and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
+	// underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
+	// signs (`%`).
+	Name string
+}
+
+type KVArg struct {
+	Key   string
+	Value interface{}
+}
+
+// TODO:  Remove and provide better may to get the device id
+// GetDeviceIdFromTopic extract the deviceId from the topic name.  The topic name is formatted either as:
+//			<any string> or <any string>_<deviceId>.  The device Id is 24 characters long.
+func GetDeviceIdFromTopic(topic Topic) string {
+	pos := strings.LastIndex(topic.Name, TopicSeparator)
+	if pos == -1 {
+		return ""
+	}
+	adjustedPos := pos + len(TopicSeparator)
+	if adjustedPos >= len(topic.Name) {
+		return ""
+	}
+	deviceId := topic.Name[adjustedPos:len(topic.Name)]
+	if len(deviceId) != DeviceIdLength {
+		return ""
+	}
+	return deviceId
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/log/log.go b/vendor/github.com/opencord/voltha-lib-go/pkg/log/log.go
new file mode 100644
index 0000000..fe3a4e0
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/log/log.go
@@ -0,0 +1,763 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//Package log provides a structured Logger interface implemented using zap logger. It provides the following capabilities:
+//1. Package level logging - a go package can register itself (AddPackage) and have a logger created for that package.
+//2. Dynamic log level change - for all registered packages (SetAllLogLevel)
+//3. Dynamic log level change - for a given package (SetPackageLogLevel)
+//4. Provides a default logger for unregistered packages
+//5. Allow key-value pairs to be added to a logger(UpdateLogger) or all loggers (UpdateAllLoggers) at run time
+//6. Add to the log output the location where the log was invoked (filename.functionname.linenumber)
+//
+// Using package-level logging (recommended approach).  In the examples below, log refers to this log package.
+// 1.  In the appropriate package add the following in the init section of the package.  The log level can be changed
+// and any number of default fields can be added as well. The log level specifies the lowest log level that will be
+// in the output while the fields will be automatically added to all log printouts.
+//
+//	log.AddPackage(mylog.JSON, log.WarnLevel, log.Fields{"anyFieldName": "any value"})
+//
+//2. In the calling package, just invoke any of the publicly available functions of the logger.  Here is an  example
+// to write an Info log with additional fields:
+//
+//log.Infow("An example", mylog.Fields{"myStringOutput": "output", "myIntOutput": 2})
+//
+//3. To dynamically change the log level, you can use 1)SetLogLevel from inside your package or 2) SetPackageLogLevel
+// from anywhere or 3)  SetAllLogLevel from anywhere.
+//
+
+package log
+
+import (
+	"errors"
+	"fmt"
+	zp "go.uber.org/zap"
+	zc "go.uber.org/zap/zapcore"
+	"path"
+	"runtime"
+	"strings"
+)
+
+const (
+	// DebugLevel logs a message at debug level
+	DebugLevel = iota
+	// InfoLevel logs a message at info level
+	InfoLevel
+	// WarnLevel logs a message at warning level
+	WarnLevel
+	// ErrorLevel logs a message at error level
+	ErrorLevel
+	// PanicLevel logs a message, then panics.
+	PanicLevel
+	// FatalLevel logs a message, then calls os.Exit(1).
+	FatalLevel
+)
+
+// CONSOLE formats the log for the console, mostly used during development
+const CONSOLE = "console"
+
+// JSON formats the log using json format, mostly used by an automated logging system consumption
+const JSON = "json"
+
+// Logger represents an abstract logging interface.  Any logging implementation used
+// will need to abide by this interface
+type Logger interface {
+	Debug(...interface{})
+	Debugln(...interface{})
+	Debugf(string, ...interface{})
+	Debugw(string, Fields)
+
+	Info(...interface{})
+	Infoln(...interface{})
+	Infof(string, ...interface{})
+	Infow(string, Fields)
+
+	Warn(...interface{})
+	Warnln(...interface{})
+	Warnf(string, ...interface{})
+	Warnw(string, Fields)
+
+	Error(...interface{})
+	Errorln(...interface{})
+	Errorf(string, ...interface{})
+	Errorw(string, Fields)
+
+	Fatal(...interface{})
+	Fatalln(...interface{})
+	Fatalf(string, ...interface{})
+	Fatalw(string, Fields)
+
+	With(Fields) Logger
+
+	// The following are added to be able to use this logger as a gRPC LoggerV2 if needed
+	//
+	Warning(...interface{})
+	Warningln(...interface{})
+	Warningf(string, ...interface{})
+
+	// V reports whether verbosity level l is at least the requested verbose level.
+	V(l int) bool
+}
+
+// Fields is used as key-value pairs for structured logging
+type Fields map[string]interface{}
+
+var defaultLogger *logger
+var cfg zp.Config
+
+var loggers map[string]*logger
+var cfgs map[string]zp.Config
+
+type logger struct {
+	log    *zp.SugaredLogger
+	parent *zp.Logger
+}
+
+func intToAtomicLevel(l int) zp.AtomicLevel {
+	switch l {
+	case DebugLevel:
+		return zp.NewAtomicLevelAt(zc.DebugLevel)
+	case InfoLevel:
+		return zp.NewAtomicLevelAt(zc.InfoLevel)
+	case WarnLevel:
+		return zp.NewAtomicLevelAt(zc.WarnLevel)
+	case ErrorLevel:
+		return zp.NewAtomicLevelAt(zc.ErrorLevel)
+	case PanicLevel:
+		return zp.NewAtomicLevelAt(zc.PanicLevel)
+	case FatalLevel:
+		return zp.NewAtomicLevelAt(zc.FatalLevel)
+	}
+	return zp.NewAtomicLevelAt(zc.ErrorLevel)
+}
+
+func intToLevel(l int) zc.Level {
+	switch l {
+	case DebugLevel:
+		return zc.DebugLevel
+	case InfoLevel:
+		return zc.InfoLevel
+	case WarnLevel:
+		return zc.WarnLevel
+	case ErrorLevel:
+		return zc.ErrorLevel
+	case PanicLevel:
+		return zc.PanicLevel
+	case FatalLevel:
+		return zc.FatalLevel
+	}
+	return zc.ErrorLevel
+}
+
+func levelToInt(l zc.Level) int {
+	switch l {
+	case zc.DebugLevel:
+		return DebugLevel
+	case zc.InfoLevel:
+		return InfoLevel
+	case zc.WarnLevel:
+		return WarnLevel
+	case zc.ErrorLevel:
+		return ErrorLevel
+	case zc.PanicLevel:
+		return PanicLevel
+	case FatalLevel:
+		return FatalLevel
+	}
+	return ErrorLevel
+}
+
+func getDefaultConfig(outputType string, level int, defaultFields Fields) zp.Config {
+	return zp.Config{
+		Level:            intToAtomicLevel(level),
+		Encoding:         outputType,
+		Development:      true,
+		OutputPaths:      []string{"stdout"},
+		ErrorOutputPaths: []string{"stderr"},
+		InitialFields:    defaultFields,
+		EncoderConfig: zc.EncoderConfig{
+			LevelKey:       "level",
+			MessageKey:     "msg",
+			TimeKey:        "ts",
+			StacktraceKey:  "stacktrace",
+			LineEnding:     zc.DefaultLineEnding,
+			EncodeLevel:    zc.LowercaseLevelEncoder,
+			EncodeTime:     zc.ISO8601TimeEncoder,
+			EncodeDuration: zc.SecondsDurationEncoder,
+			EncodeCaller:   zc.ShortCallerEncoder,
+		},
+	}
+}
+
+// SetLogger needs to be invoked before the logger API can be invoked.  This function
+// initialize the default logger (zap's sugaredlogger)
+func SetDefaultLogger(outputType string, level int, defaultFields Fields) (Logger, error) {
+	// Build a custom config using zap
+	cfg = getDefaultConfig(outputType, level, defaultFields)
+
+	l, err := cfg.Build()
+	if err != nil {
+		return nil, err
+	}
+
+	defaultLogger = &logger{
+		log:    l.Sugar(),
+		parent: l,
+	}
+
+	return defaultLogger, nil
+}
+
+// AddPackage registers a package to the log map.  Each package gets its own logger which allows
+// its config (loglevel) to be changed dynamically without interacting with the other packages.
+// outputType is JSON, level is the lowest level log to output with this logger and defaultFields is a map of
+// key-value pairs to always add to the output.
+// Note: AddPackage also returns a reference to the actual logger.  If a calling package uses this reference directly
+//instead of using the publicly available functions in this log package then a number of functionalities will not
+// be available to it, notably log tracing with filename.functionname.linenumber annotation.
+//
+// pkgNames parameter should be used for testing only as this function detects the caller's package.
+func AddPackage(outputType string, level int, defaultFields Fields, pkgNames ...string) (Logger, error) {
+	if cfgs == nil {
+		cfgs = make(map[string]zp.Config)
+	}
+	if loggers == nil {
+		loggers = make(map[string]*logger)
+	}
+
+	var pkgName string
+	for _, name := range pkgNames {
+		pkgName = name
+		break
+	}
+	if pkgName == "" {
+		pkgName, _, _, _ = getCallerInfo()
+	}
+
+	if _, exist := loggers[pkgName]; exist {
+		return loggers[pkgName], nil
+	}
+
+	cfgs[pkgName] = getDefaultConfig(outputType, level, defaultFields)
+
+	l, err := cfgs[pkgName].Build()
+	if err != nil {
+		return nil, err
+	}
+
+	loggers[pkgName] = &logger{
+		log:    l.Sugar(),
+		parent: l,
+	}
+	return loggers[pkgName], nil
+}
+
+//UpdateAllLoggers create new loggers for all registered pacakges with the defaultFields.
+func UpdateAllLoggers(defaultFields Fields) error {
+	for pkgName, cfg := range cfgs {
+		for k, v := range defaultFields {
+			if cfg.InitialFields == nil {
+				cfg.InitialFields = make(map[string]interface{})
+			}
+			cfg.InitialFields[k] = v
+		}
+		l, err := cfg.Build()
+		if err != nil {
+			return err
+		}
+
+		loggers[pkgName] = &logger{
+			log:    l.Sugar(),
+			parent: l,
+		}
+	}
+	return nil
+}
+
+// Return a list of all packages that have individually-configured loggers
+func GetPackageNames() []string {
+	i := 0
+	keys := make([]string, len(loggers))
+	for k := range loggers {
+		keys[i] = k
+		i++
+	}
+	return keys
+}
+
+// UpdateLogger deletes the logger associated with a caller's package and creates a new logger with the
+// defaultFields.  If a calling package is holding on to a Logger reference obtained from AddPackage invocation, then
+// that package needs to invoke UpdateLogger if it needs to make changes to the default fields and obtain a new logger
+// reference
+func UpdateLogger(defaultFields Fields) (Logger, error) {
+	pkgName, _, _, _ := getCallerInfo()
+	if _, exist := loggers[pkgName]; !exist {
+		return nil, errors.New(fmt.Sprintf("package-%s-not-registered", pkgName))
+	}
+
+	// Build a new logger
+	if _, exist := cfgs[pkgName]; !exist {
+		return nil, errors.New(fmt.Sprintf("config-%s-not-registered", pkgName))
+	}
+
+	cfg := cfgs[pkgName]
+	for k, v := range defaultFields {
+		if cfg.InitialFields == nil {
+			cfg.InitialFields = make(map[string]interface{})
+		}
+		cfg.InitialFields[k] = v
+	}
+	l, err := cfg.Build()
+	if err != nil {
+		return nil, err
+	}
+
+	// Set the logger
+	loggers[pkgName] = &logger{
+		log:    l.Sugar(),
+		parent: l,
+	}
+	return loggers[pkgName], nil
+}
+
+func setLevel(cfg zp.Config, level int) {
+	switch level {
+	case DebugLevel:
+		cfg.Level.SetLevel(zc.DebugLevel)
+	case InfoLevel:
+		cfg.Level.SetLevel(zc.InfoLevel)
+	case WarnLevel:
+		cfg.Level.SetLevel(zc.WarnLevel)
+	case ErrorLevel:
+		cfg.Level.SetLevel(zc.ErrorLevel)
+	case PanicLevel:
+		cfg.Level.SetLevel(zc.PanicLevel)
+	case FatalLevel:
+		cfg.Level.SetLevel(zc.FatalLevel)
+	default:
+		cfg.Level.SetLevel(zc.ErrorLevel)
+	}
+}
+
+//SetPackageLogLevel dynamically sets the log level of a given package to level.  This is typically invoked at an
+// application level during debugging
+func SetPackageLogLevel(packageName string, level int) {
+	// Get proper config
+	if cfg, ok := cfgs[packageName]; ok {
+		setLevel(cfg, level)
+	}
+}
+
+//SetAllLogLevel sets the log level of all registered packages to level
+func SetAllLogLevel(level int) {
+	// Get proper config
+	for _, cfg := range cfgs {
+		setLevel(cfg, level)
+	}
+}
+
+//GetPackageLogLevel returns the current log level of a package.
+func GetPackageLogLevel(packageName ...string) (int, error) {
+	var name string
+	if len(packageName) == 1 {
+		name = packageName[0]
+	} else {
+		name, _, _, _ = getCallerInfo()
+	}
+	if cfg, ok := cfgs[name]; ok {
+		return levelToInt(cfg.Level.Level()), nil
+	}
+	return 0, errors.New(fmt.Sprintf("unknown-package-%s", name))
+}
+
+//GetDefaultLogLevel gets the log level used for packages that don't have specific loggers
+func GetDefaultLogLevel() int {
+	return levelToInt(cfg.Level.Level())
+}
+
+//SetLogLevel sets the log level for the logger corresponding to the caller's package
+func SetLogLevel(level int) error {
+	pkgName, _, _, _ := getCallerInfo()
+	if _, exist := cfgs[pkgName]; !exist {
+		return errors.New(fmt.Sprintf("unregistered-package-%s", pkgName))
+	}
+	cfg := cfgs[pkgName]
+	setLevel(cfg, level)
+	return nil
+}
+
+//SetDefaultLogLevel sets the log level used for packages that don't have specific loggers
+func SetDefaultLogLevel(level int) {
+	setLevel(cfg, level)
+}
+
+// CleanUp flushed any buffered log entries. Applications should take care to call
+// CleanUp before exiting.
+func CleanUp() error {
+	for _, logger := range loggers {
+		if logger != nil {
+			if logger.parent != nil {
+				if err := logger.parent.Sync(); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	if defaultLogger != nil {
+		if defaultLogger.parent != nil {
+			if err := defaultLogger.parent.Sync(); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func getCallerInfo() (string, string, string, int) {
+	// Since the caller of a log function is one stack frame before (in terms of stack higher level) the log.go
+	// filename, then first look for the last log.go filename and then grab the caller info one level higher.
+	maxLevel := 3
+	skiplevel := 3 // Level with the most empirical success to see the last log.go stack frame.
+	pc := make([]uintptr, maxLevel)
+	n := runtime.Callers(skiplevel, pc)
+	packageName := ""
+	funcName := ""
+	fileName := ""
+	var line int
+	if n == 0 {
+		return packageName, fileName, funcName, line
+	}
+	frames := runtime.CallersFrames(pc[:n])
+	var frame runtime.Frame
+	var foundFrame runtime.Frame
+	more := true
+	for more {
+		frame, more = frames.Next()
+		_, fileName = path.Split(frame.File)
+		if fileName != "log.go" {
+			foundFrame = frame // First frame after log.go in the frame stack
+			break
+		}
+	}
+	parts := strings.Split(foundFrame.Function, ".")
+	pl := len(parts)
+	if pl >= 2 {
+		funcName = parts[pl-1]
+		if parts[pl-2][0] == '(' {
+			packageName = strings.Join(parts[0:pl-2], ".")
+		} else {
+			packageName = strings.Join(parts[0:pl-1], ".")
+		}
+	}
+
+	if strings.HasSuffix(packageName, ".init") {
+		packageName = strings.TrimSuffix(packageName, ".init")
+	}
+
+	if strings.HasSuffix(fileName, ".go") {
+		fileName = strings.TrimSuffix(fileName, ".go")
+	}
+
+	return packageName, fileName, funcName, foundFrame.Line
+}
+
+func getPackageLevelSugaredLogger() *zp.SugaredLogger {
+	pkgName, fileName, funcName, line := getCallerInfo()
+	if _, exist := loggers[pkgName]; exist {
+		return loggers[pkgName].log.With("caller", fmt.Sprintf("%s.%s:%d", fileName, funcName, line))
+	}
+	return defaultLogger.log.With("caller", fmt.Sprintf("%s.%s:%d", fileName, funcName, line))
+}
+
+func getPackageLevelLogger() Logger {
+	pkgName, _, _, _ := getCallerInfo()
+	if _, exist := loggers[pkgName]; exist {
+		return loggers[pkgName]
+	}
+	return defaultLogger
+}
+
+func serializeMap(fields Fields) []interface{} {
+	data := make([]interface{}, len(fields)*2)
+	i := 0
+	for k, v := range fields {
+		data[i] = k
+		data[i+1] = v
+		i = i + 2
+	}
+	return data
+}
+
+// With returns a logger initialized with the key-value pairs
+func (l logger) With(keysAndValues Fields) Logger {
+	return logger{log: l.log.With(serializeMap(keysAndValues)...), parent: l.parent}
+}
+
+// Debug logs a message at level Debug on the standard logger.
+func (l logger) Debug(args ...interface{}) {
+	l.log.Debug(args...)
+}
+
+// Debugln logs a message at level Debug on the standard logger with a line feed. Default in any case.
+func (l logger) Debugln(args ...interface{}) {
+	l.log.Debug(args...)
+}
+
+// Debugw logs a message at level Debug on the standard logger.
+func (l logger) Debugf(format string, args ...interface{}) {
+	l.log.Debugf(format, args...)
+}
+
+// Debugw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func (l logger) Debugw(msg string, keysAndValues Fields) {
+	l.log.Debugw(msg, serializeMap(keysAndValues)...)
+}
+
+// Info logs a message at level Info on the standard logger.
+func (l logger) Info(args ...interface{}) {
+	l.log.Info(args...)
+}
+
+// Infoln logs a message at level Info on the standard logger with a line feed. Default in any case.
+func (l logger) Infoln(args ...interface{}) {
+	l.log.Info(args...)
+	//msg := fmt.Sprintln(args...)
+	//l.sourced().Info(msg[:len(msg)-1])
+}
+
+// Infof logs a message at level Info on the standard logger.
+func (l logger) Infof(format string, args ...interface{}) {
+	l.log.Infof(format, args...)
+}
+
+// Infow logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func (l logger) Infow(msg string, keysAndValues Fields) {
+	l.log.Infow(msg, serializeMap(keysAndValues)...)
+}
+
+// Warn logs a message at level Warn on the standard logger.
+func (l logger) Warn(args ...interface{}) {
+	l.log.Warn(args...)
+}
+
+// Warnln logs a message at level Warn on the standard logger with a line feed. Default in any case.
+func (l logger) Warnln(args ...interface{}) {
+	l.log.Warn(args...)
+}
+
+// Warnf logs a message at level Warn on the standard logger.
+func (l logger) Warnf(format string, args ...interface{}) {
+	l.log.Warnf(format, args...)
+}
+
+// Warnw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func (l logger) Warnw(msg string, keysAndValues Fields) {
+	l.log.Warnw(msg, serializeMap(keysAndValues)...)
+}
+
+// Error logs a message at level Error on the standard logger.
+func (l logger) Error(args ...interface{}) {
+	l.log.Error(args...)
+}
+
+// Errorln logs a message at level Error on the standard logger with a line feed. Default in any case.
+func (l logger) Errorln(args ...interface{}) {
+	l.log.Error(args...)
+}
+
+// Errorf logs a message at level Error on the standard logger.
+func (l logger) Errorf(format string, args ...interface{}) {
+	l.log.Errorf(format, args...)
+}
+
+// Errorw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func (l logger) Errorw(msg string, keysAndValues Fields) {
+	l.log.Errorw(msg, serializeMap(keysAndValues)...)
+}
+
+// Fatal logs a message at level Fatal on the standard logger.
+func (l logger) Fatal(args ...interface{}) {
+	l.log.Fatal(args...)
+}
+
+// Fatalln logs a message at level Fatal on the standard logger with a line feed. Default in any case.
+func (l logger) Fatalln(args ...interface{}) {
+	l.log.Fatal(args...)
+}
+
+// Fatalf logs a message at level Fatal on the standard logger.
+func (l logger) Fatalf(format string, args ...interface{}) {
+	l.log.Fatalf(format, args...)
+}
+
+// Fatalw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func (l logger) Fatalw(msg string, keysAndValues Fields) {
+	l.log.Fatalw(msg, serializeMap(keysAndValues)...)
+}
+
+// Warning logs a message at level Warn on the standard logger.
+func (l logger) Warning(args ...interface{}) {
+	l.log.Warn(args...)
+}
+
+// Warningln logs a message at level Warn on the standard logger with a line feed. Default in any case.
+func (l logger) Warningln(args ...interface{}) {
+	l.log.Warn(args...)
+}
+
+// Warningf logs a message at level Warn on the standard logger.
+func (l logger) Warningf(format string, args ...interface{}) {
+	l.log.Warnf(format, args...)
+}
+
+// V reports whether verbosity level l is at least the requested verbose level.
+func (l logger) V(level int) bool {
+	return l.parent.Core().Enabled(intToLevel(level))
+}
+
+// With returns a logger initialized with the key-value pairs
+func With(keysAndValues Fields) Logger {
+	return logger{log: getPackageLevelSugaredLogger().With(serializeMap(keysAndValues)...), parent: defaultLogger.parent}
+}
+
+// Debug logs a message at level Debug on the standard logger.
+func Debug(args ...interface{}) {
+	getPackageLevelSugaredLogger().Debug(args...)
+}
+
+// Debugln logs a message at level Debug on the standard logger.
+func Debugln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Debug(args...)
+}
+
+// Debugf logs a message at level Debug on the standard logger.
+func Debugf(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Debugf(format, args...)
+}
+
+// Debugw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func Debugw(msg string, keysAndValues Fields) {
+	getPackageLevelSugaredLogger().Debugw(msg, serializeMap(keysAndValues)...)
+}
+
+// Info logs a message at level Info on the standard logger.
+func Info(args ...interface{}) {
+	getPackageLevelSugaredLogger().Info(args...)
+}
+
+// Infoln logs a message at level Info on the standard logger.
+func Infoln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Info(args...)
+}
+
+// Infof logs a message at level Info on the standard logger.
+func Infof(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Infof(format, args...)
+}
+
+//Infow logs a message with some additional context. The variadic key-value
+//pairs are treated as they are in With.
+func Infow(msg string, keysAndValues Fields) {
+	getPackageLevelSugaredLogger().Infow(msg, serializeMap(keysAndValues)...)
+}
+
+// Warn logs a message at level Warn on the standard logger.
+func Warn(args ...interface{}) {
+	getPackageLevelSugaredLogger().Warn(args...)
+}
+
+// Warnln logs a message at level Warn on the standard logger.
+func Warnln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Warn(args...)
+}
+
+// Warnf logs a message at level Warn on the standard logger.
+func Warnf(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Warnf(format, args...)
+}
+
+// Warnw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func Warnw(msg string, keysAndValues Fields) {
+	getPackageLevelSugaredLogger().Warnw(msg, serializeMap(keysAndValues)...)
+}
+
+// Error logs a message at level Error on the standard logger.
+func Error(args ...interface{}) {
+	getPackageLevelSugaredLogger().Error(args...)
+}
+
+// Errorln logs a message at level Error on the standard logger.
+func Errorln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Error(args...)
+}
+
+// Errorf logs a message at level Error on the standard logger.
+func Errorf(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Errorf(format, args...)
+}
+
+// Errorw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func Errorw(msg string, keysAndValues Fields) {
+	getPackageLevelSugaredLogger().Errorw(msg, serializeMap(keysAndValues)...)
+}
+
+// Fatal logs a message at level Fatal on the standard logger.
+func Fatal(args ...interface{}) {
+	getPackageLevelSugaredLogger().Fatal(args...)
+}
+
+// Fatalln logs a message at level Fatal on the standard logger.
+func Fatalln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Fatal(args...)
+}
+
+// Fatalf logs a message at level Fatal on the standard logger.
+func Fatalf(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Fatalf(format, args...)
+}
+
+// Fatalw logs a message with some additional context. The variadic key-value
+// pairs are treated as they are in With.
+func Fatalw(msg string, keysAndValues Fields) {
+	getPackageLevelSugaredLogger().Fatalw(msg, serializeMap(keysAndValues)...)
+}
+
+// Warning logs a message at level Warn on the standard logger.
+func Warning(args ...interface{}) {
+	getPackageLevelSugaredLogger().Warn(args...)
+}
+
+// Warningln logs a message at level Warn on the standard logger.
+func Warningln(args ...interface{}) {
+	getPackageLevelSugaredLogger().Warn(args...)
+}
+
+// Warningf logs a message at level Warn on the standard logger.
+func Warningf(format string, args ...interface{}) {
+	getPackageLevelSugaredLogger().Warnf(format, args...)
+}
+
+// V reports whether verbosity level l is at least the requested verbose level.
+func V(level int) bool {
+	return getPackageLevelLogger().V(level)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/ponresourcemanager/ponresourcemanager.go b/vendor/github.com/opencord/voltha-lib-go/pkg/ponresourcemanager/ponresourcemanager.go
new file mode 100755
index 0000000..12e6a3c
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/ponresourcemanager/ponresourcemanager.go
@@ -0,0 +1,1180 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ponresourcemanager
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+
+	bitmap "github.com/boljen/go-bitmap"
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/pkg/db/model"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	tp "github.com/opencord/voltha-lib-go/pkg/techprofile"
+)
+
+const (
+	//Constants to identify resource pool
+	UNI_ID     = "UNI_ID"
+	ONU_ID     = "ONU_ID"
+	ALLOC_ID   = "ALLOC_ID"
+	GEMPORT_ID = "GEMPORT_ID"
+	FLOW_ID    = "FLOW_ID"
+
+	//Constants for passing command line arugments
+	OLT_MODEL_ARG = "--olt_model"
+	PATH_PREFIX   = "service/voltha/resource_manager/{%s}"
+	/*The resource ranges for a given device model should be placed
+	  at 'resource_manager/<technology>/resource_ranges/<olt_model_type>'
+	  path on the KV store.
+	  If Resource Range parameters are to be read from the external KV store,
+	  they are expected to be stored in the following format.
+	  Note: All parameters are MANDATORY for now.
+	  constants used as keys to reference the resource range parameters from
+	  and external KV store.
+	*/
+	UNI_ID_START_IDX      = "uni_id_start"
+	UNI_ID_END_IDX        = "uni_id_end"
+	ONU_ID_START_IDX      = "onu_id_start"
+	ONU_ID_END_IDX        = "onu_id_end"
+	ONU_ID_SHARED_IDX     = "onu_id_shared"
+	ALLOC_ID_START_IDX    = "alloc_id_start"
+	ALLOC_ID_END_IDX      = "alloc_id_end"
+	ALLOC_ID_SHARED_IDX   = "alloc_id_shared"
+	GEMPORT_ID_START_IDX  = "gemport_id_start"
+	GEMPORT_ID_END_IDX    = "gemport_id_end"
+	GEMPORT_ID_SHARED_IDX = "gemport_id_shared"
+	FLOW_ID_START_IDX     = "flow_id_start"
+	FLOW_ID_END_IDX       = "flow_id_end"
+	FLOW_ID_SHARED_IDX    = "flow_id_shared"
+	NUM_OF_PON_PORT       = "pon_ports"
+
+	/*
+	   The KV store backend is initialized with a path prefix and we need to
+	   provide only the suffix.
+	*/
+	PON_RESOURCE_RANGE_CONFIG_PATH = "resource_ranges/%s"
+
+	//resource path suffix
+	//Path on the KV store for storing alloc id ranges and resource pool for a given interface
+	//Format: <device_id>/alloc_id_pool/<pon_intf_id>
+	ALLOC_ID_POOL_PATH = "{%s}/alloc_id_pool/{%d}"
+	//Path on the KV store for storing gemport id ranges and resource pool for a given interface
+	//Format: <device_id>/gemport_id_pool/<pon_intf_id>
+	GEMPORT_ID_POOL_PATH = "{%s}/gemport_id_pool/{%d}"
+	//Path on the KV store for storing onu id ranges and resource pool for a given interface
+	//Format: <device_id>/onu_id_pool/<pon_intf_id>
+	ONU_ID_POOL_PATH = "{%s}/onu_id_pool/{%d}"
+	//Path on the KV store for storing flow id ranges and resource pool for a given interface
+	//Format: <device_id>/flow_id_pool/<pon_intf_id>
+	FLOW_ID_POOL_PATH = "{%s}/flow_id_pool/{%d}"
+
+	//Path on the KV store for storing list of alloc IDs for a given ONU
+	//Format: <device_id>/<(pon_intf_id, onu_id)>/alloc_ids
+	ALLOC_ID_RESOURCE_MAP_PATH = "{%s}/{%s}/alloc_ids"
+
+	//Path on the KV store for storing list of gemport IDs for a given ONU
+	//Format: <device_id>/<(pon_intf_id, onu_id)>/gemport_ids
+	GEMPORT_ID_RESOURCE_MAP_PATH = "{%s}/{%s}/gemport_ids"
+
+	//Path on the KV store for storing list of Flow IDs for a given ONU
+	//Format: <device_id>/<(pon_intf_id, onu_id)>/flow_ids
+	FLOW_ID_RESOURCE_MAP_PATH = "{%s}/{%s}/flow_ids"
+
+	//Flow Id info: Use to store more metadata associated with the flow_id
+	//Format: <device_id>/<(pon_intf_id, onu_id)>/flow_id_info/<flow_id>
+	FLOW_ID_INFO_PATH = "{%s}/{%s}/flow_id_info/{%d}"
+
+	//Constants for internal usage.
+	PON_INTF_ID     = "pon_intf_id"
+	START_IDX       = "start_idx"
+	END_IDX         = "end_idx"
+	POOL            = "pool"
+	NUM_OF_PON_INTF = 16
+
+	KVSTORE_RETRY_TIMEOUT = 5
+)
+
+//type ResourceTypeIndex string
+//type ResourceType string
+
+type PONResourceManager struct {
+	//Implements APIs to initialize/allocate/release alloc/gemport/onu IDs.
+	Technology     string
+	DeviceType     string
+	DeviceID       string
+	Backend        string // ETCD, or consul
+	Host           string // host ip of the KV store
+	Port           int    // port number for the KV store
+	OLTModel       string
+	KVStore        *model.Backend
+	TechProfileMgr tp.TechProfileIf // create object of *tp.TechProfileMgr
+
+	// Below attribute, pon_resource_ranges, should be initialized
+	// by reading from KV store.
+	PonResourceRanges  map[string]interface{}
+	SharedResourceMgrs map[string]*PONResourceManager
+	SharedIdxByType    map[string]string
+	IntfIDs            []uint32 // list of pon interface IDs
+	Globalorlocal      string
+}
+
+func newKVClient(storeType string, address string, timeout int) (kvstore.Client, error) {
+	log.Infow("kv-store-type", log.Fields{"store": storeType})
+	switch storeType {
+	case "consul":
+		return kvstore.NewConsulClient(address, timeout)
+	case "etcd":
+		return kvstore.NewEtcdClient(address, timeout)
+	}
+	return nil, errors.New("unsupported-kv-store")
+}
+
+func SetKVClient(Technology string, Backend string, Host string, Port int) *model.Backend {
+	addr := Host + ":" + strconv.Itoa(Port)
+	// TODO : Make sure direct call to NewBackend is working fine with backend , currently there is some
+	// issue between kv store and backend , core is not calling NewBackend directly
+	kvClient, err := newKVClient(Backend, addr, KVSTORE_RETRY_TIMEOUT)
+	if err != nil {
+		log.Fatalw("Failed to init KV client\n", log.Fields{"err": err})
+		return nil
+	}
+	kvbackend := &model.Backend{
+		Client:     kvClient,
+		StoreType:  Backend,
+		Host:       Host,
+		Port:       Port,
+		Timeout:    KVSTORE_RETRY_TIMEOUT,
+		PathPrefix: fmt.Sprintf(PATH_PREFIX, Technology)}
+
+	return kvbackend
+}
+
+// NewPONResourceManager creates a new PON resource manager.
+func NewPONResourceManager(Technology string, DeviceType string, DeviceID string, Backend string, Host string, Port int) (*PONResourceManager, error) {
+	var PONMgr PONResourceManager
+	PONMgr.Technology = Technology
+	PONMgr.DeviceType = DeviceType
+	PONMgr.DeviceID = DeviceID
+	PONMgr.Backend = Backend
+	PONMgr.Host = Host
+	PONMgr.Port = Port
+	PONMgr.KVStore = SetKVClient(Technology, Backend, Host, Port)
+	if PONMgr.KVStore == nil {
+		log.Error("KV Client initilization failed")
+		return nil, errors.New("Failed to init KV client")
+	}
+	// Initialize techprofile for this technology
+	if PONMgr.TechProfileMgr, _ = tp.NewTechProfile(&PONMgr, Backend, Host, Port); PONMgr.TechProfileMgr == nil {
+		log.Error("Techprofile initialization failed")
+		return nil, errors.New("Failed to init tech profile")
+	}
+	PONMgr.PonResourceRanges = make(map[string]interface{})
+	PONMgr.SharedResourceMgrs = make(map[string]*PONResourceManager)
+	PONMgr.SharedIdxByType = make(map[string]string)
+	PONMgr.SharedIdxByType[ONU_ID] = ONU_ID_SHARED_IDX
+	PONMgr.SharedIdxByType[ALLOC_ID] = ALLOC_ID_SHARED_IDX
+	PONMgr.SharedIdxByType[GEMPORT_ID] = GEMPORT_ID_SHARED_IDX
+	PONMgr.SharedIdxByType[FLOW_ID] = FLOW_ID_SHARED_IDX
+	PONMgr.IntfIDs = make([]uint32, NUM_OF_PON_INTF)
+	PONMgr.OLTModel = DeviceType
+	return &PONMgr, nil
+}
+
+/*
+  Initialize PON resource ranges with config fetched from kv store.
+  return boolean: True if PON resource ranges initialized else false
+  Try to initialize the PON Resource Ranges from KV store based on the
+  OLT model key, if available
+*/
+
+func (PONRMgr *PONResourceManager) InitResourceRangesFromKVStore() bool {
+	//Initialize PON resource ranges with config fetched from kv store.
+	//:return boolean: True if PON resource ranges initialized else false
+	// Try to initialize the PON Resource Ranges from KV store based on the
+	// OLT model key, if available
+	if PONRMgr.OLTModel == "" {
+		log.Error("Failed to get OLT model")
+		return false
+	}
+	Path := fmt.Sprintf(PON_RESOURCE_RANGE_CONFIG_PATH, PONRMgr.OLTModel)
+	//get resource from kv store
+	Result, err := PONRMgr.KVStore.Get(Path)
+	if err != nil {
+		log.Debugf("Error in fetching resource %s from KV strore", Path)
+		return false
+	}
+	if Result == nil {
+		log.Debug("There may be no resources in the KV store in case of fresh bootup, return true")
+		return false
+	}
+	//update internal ranges from kv ranges. If there are missing
+	// values in the KV profile, continue to use the defaults
+	Value, err := ToByte(Result.Value)
+	if err != nil {
+		log.Error("Failed to convert kvpair to byte string")
+		return false
+	}
+	if err := json.Unmarshal(Value, &PONRMgr.PonResourceRanges); err != nil {
+		log.Error("Failed to Unmarshal json byte")
+		return false
+	}
+	log.Debug("Init resource ranges from kvstore success")
+	return true
+}
+
+func (PONRMgr *PONResourceManager) UpdateRanges(StartIDx string, StartID uint32, EndIDx string, EndID uint32,
+	SharedIDx string, SharedPoolID uint32, RMgr *PONResourceManager) {
+	/*
+	   Update the ranges for all reosurce type in the intermnal maps
+	   param: resource type start index
+	   param: start ID
+	   param: resource type end index
+	   param: end ID
+	   param: resource type shared index
+	   param: shared pool id
+	   param: global resource manager
+	*/
+	log.Debugf("update ranges for %s, %d", StartIDx, StartID)
+
+	if StartID != 0 {
+		if (PONRMgr.PonResourceRanges[StartIDx] == nil) || (PONRMgr.PonResourceRanges[StartIDx].(uint32) < StartID) {
+			PONRMgr.PonResourceRanges[StartIDx] = StartID
+		}
+	}
+	if EndID != 0 {
+		if (PONRMgr.PonResourceRanges[EndIDx] == nil) || (PONRMgr.PonResourceRanges[EndIDx].(uint32) > EndID) {
+			PONRMgr.PonResourceRanges[EndIDx] = EndID
+		}
+	}
+	//if SharedPoolID != 0 {
+	PONRMgr.PonResourceRanges[SharedIDx] = SharedPoolID
+	//}
+	if RMgr != nil {
+		PONRMgr.SharedResourceMgrs[SharedIDx] = RMgr
+	}
+}
+
+func (PONRMgr *PONResourceManager) InitDefaultPONResourceRanges(ONUIDStart uint32,
+	ONUIDEnd uint32,
+	ONUIDSharedPoolID uint32,
+	AllocIDStart uint32,
+	AllocIDEnd uint32,
+	AllocIDSharedPoolID uint32,
+	GEMPortIDStart uint32,
+	GEMPortIDEnd uint32,
+	GEMPortIDSharedPoolID uint32,
+	FlowIDStart uint32,
+	FlowIDEnd uint32,
+	FlowIDSharedPoolID uint32,
+	UNIIDStart uint32,
+	UNIIDEnd uint32,
+	NoOfPONPorts uint32,
+	IntfIDs []uint32) bool {
+
+	/*Initialize default PON resource ranges
+
+	  :param onu_id_start_idx: onu id start index
+	  :param onu_id_end_idx: onu id end index
+	  :param onu_id_shared_pool_id: pool idx for id shared by all intfs or None for no sharing
+	  :param alloc_id_start_idx: alloc id start index
+	  :param alloc_id_end_idx: alloc id end index
+	  :param alloc_id_shared_pool_id: pool idx for alloc id shared by all intfs or None for no sharing
+	  :param gemport_id_start_idx: gemport id start index
+	  :param gemport_id_end_idx: gemport id end index
+	  :param gemport_id_shared_pool_id: pool idx for gemport id shared by all intfs or None for no sharing
+	  :param flow_id_start_idx: flow id start index
+	  :param flow_id_end_idx: flow id end index
+	  :param flow_id_shared_pool_id: pool idx for flow id shared by all intfs or None for no sharing
+	  :param num_of_pon_ports: number of PON ports
+	  :param intf_ids: interfaces serviced by this manager
+	*/
+	PONRMgr.UpdateRanges(ONU_ID_START_IDX, ONUIDStart, ONU_ID_END_IDX, ONUIDEnd, ONU_ID_SHARED_IDX, ONUIDSharedPoolID, nil)
+	PONRMgr.UpdateRanges(ALLOC_ID_START_IDX, AllocIDStart, ALLOC_ID_END_IDX, AllocIDEnd, ALLOC_ID_SHARED_IDX, AllocIDSharedPoolID, nil)
+	PONRMgr.UpdateRanges(GEMPORT_ID_START_IDX, GEMPortIDStart, GEMPORT_ID_END_IDX, GEMPortIDEnd, GEMPORT_ID_SHARED_IDX, GEMPortIDSharedPoolID, nil)
+	PONRMgr.UpdateRanges(FLOW_ID_START_IDX, FlowIDStart, FLOW_ID_END_IDX, FlowIDEnd, FLOW_ID_SHARED_IDX, FlowIDSharedPoolID, nil)
+	PONRMgr.UpdateRanges(UNI_ID_START_IDX, UNIIDStart, UNI_ID_END_IDX, UNIIDEnd, "", 0, nil)
+	log.Debug("Initialize default range values")
+	var i uint32
+	if IntfIDs == nil {
+		for i = 0; i < NoOfPONPorts; i++ {
+			PONRMgr.IntfIDs = append(PONRMgr.IntfIDs, i)
+		}
+	} else {
+		PONRMgr.IntfIDs = IntfIDs
+	}
+	return true
+}
+
+func (PONRMgr *PONResourceManager) InitDeviceResourcePool() error {
+
+	//Initialize resource pool for all PON ports.
+
+	log.Debug("Init resource ranges")
+
+	var err error
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[ONU_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if err = PONRMgr.InitResourceIDPool(Intf, ONU_ID,
+			PONRMgr.PonResourceRanges[ONU_ID_START_IDX].(uint32),
+			PONRMgr.PonResourceRanges[ONU_ID_END_IDX].(uint32)); err != nil {
+			log.Error("Failed to init ONU ID resource pool")
+			return err
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[ALLOC_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if err = PONRMgr.InitResourceIDPool(Intf, ALLOC_ID,
+			PONRMgr.PonResourceRanges[ALLOC_ID_START_IDX].(uint32),
+			PONRMgr.PonResourceRanges[ALLOC_ID_END_IDX].(uint32)); err != nil {
+			log.Error("Failed to init ALLOC ID resource pool ")
+			return err
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[GEMPORT_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if err = PONRMgr.InitResourceIDPool(Intf, GEMPORT_ID,
+			PONRMgr.PonResourceRanges[GEMPORT_ID_START_IDX].(uint32),
+			PONRMgr.PonResourceRanges[GEMPORT_ID_END_IDX].(uint32)); err != nil {
+			log.Error("Failed to init GEMPORT ID resource pool")
+			return err
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[FLOW_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if err = PONRMgr.InitResourceIDPool(Intf, FLOW_ID,
+			PONRMgr.PonResourceRanges[FLOW_ID_START_IDX].(uint32),
+			PONRMgr.PonResourceRanges[FLOW_ID_END_IDX].(uint32)); err != nil {
+			log.Error("Failed to init FLOW ID resource pool")
+			return err
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+	return err
+}
+
+func (PONRMgr *PONResourceManager) ClearDeviceResourcePool() error {
+
+	//Clear resource pool for all PON ports.
+
+	log.Debug("Clear resource ranges")
+
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[ONU_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if status := PONRMgr.ClearResourceIDPool(Intf, ONU_ID); status != true {
+			log.Error("Failed to clear ONU ID resource pool")
+			return errors.New("Failed to clear ONU ID resource pool")
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[ALLOC_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if status := PONRMgr.ClearResourceIDPool(Intf, ALLOC_ID); status != true {
+			log.Error("Failed to clear ALLOC ID resource pool ")
+			return errors.New("Failed to clear ALLOC ID resource pool")
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[GEMPORT_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if status := PONRMgr.ClearResourceIDPool(Intf, GEMPORT_ID); status != true {
+			log.Error("Failed to clear GEMPORT ID resource pool")
+			return errors.New("Failed to clear GEMPORT ID resource pool")
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+
+	for _, Intf := range PONRMgr.IntfIDs {
+		SharedPoolID := PONRMgr.PonResourceRanges[FLOW_ID_SHARED_IDX].(uint32)
+		if SharedPoolID != 0 {
+			Intf = SharedPoolID
+		}
+		if status := PONRMgr.ClearResourceIDPool(Intf, FLOW_ID); status != true {
+			log.Error("Failed to clear FLOW ID resource pool")
+			return errors.New("Failed to clear FLOW ID resource pool")
+		}
+		if SharedPoolID != 0 {
+			break
+		}
+	}
+	return nil
+}
+
+func (PONRMgr *PONResourceManager) InitResourceIDPool(Intf uint32, ResourceType string, StartID uint32, EndID uint32) error {
+
+	/*Initialize Resource ID pool for a given Resource Type on a given PON Port
+
+	  :param pon_intf_id: OLT PON interface id
+	  :param resource_type: String to identify type of resource
+	  :param start_idx: start index for onu id pool
+	  :param end_idx: end index for onu id pool
+	  :return boolean: True if resource id pool initialized else false
+	*/
+
+	// delegate to the master instance if sharing enabled across instances
+	SharedResourceMgr := PONRMgr.SharedResourceMgrs[PONRMgr.SharedIdxByType[ResourceType]]
+	if SharedResourceMgr != nil && PONRMgr != SharedResourceMgr {
+		return SharedResourceMgr.InitResourceIDPool(Intf, ResourceType, StartID, EndID)
+	}
+
+	Path := PONRMgr.GetPath(Intf, ResourceType)
+	if Path == "" {
+		log.Errorf("Failed to get path for resource type %s", ResourceType)
+		return errors.New(fmt.Sprintf("Failed to get path for resource type %s", ResourceType))
+	}
+
+	//In case of adapter reboot and reconciliation resource in kv store
+	//checked for its presence if not kv store update happens
+	Res, err := PONRMgr.GetResource(Path)
+	if (err == nil) && (Res != nil) {
+		log.Debugf("Resource %s already present in store ", Path)
+		return nil
+	} else {
+		FormatResult, err := PONRMgr.FormatResource(Intf, StartID, EndID)
+		if err != nil {
+			log.Errorf("Failed to format resource")
+			return err
+		}
+		// Add resource as json in kv store.
+		err = PONRMgr.KVStore.Put(Path, FormatResult)
+		if err == nil {
+			log.Debug("Successfuly posted to kv store")
+			return err
+		}
+	}
+
+	log.Debug("Error initializing pool")
+
+	return err
+}
+
+func (PONRMgr *PONResourceManager) FormatResource(IntfID uint32, StartIDx uint32, EndIDx uint32) ([]byte, error) {
+	/*
+	   Format resource as json.
+	   :param pon_intf_id: OLT PON interface id
+	   :param start_idx: start index for id pool
+	   :param end_idx: end index for id pool
+	   :return dictionary: resource formatted as map
+	*/
+	// Format resource as json to be stored in backend store
+	Resource := make(map[string]interface{})
+	Resource[PON_INTF_ID] = IntfID
+	Resource[START_IDX] = StartIDx
+	Resource[END_IDX] = EndIDx
+	/*
+	   Resource pool stored in backend store as binary string.
+	   Tracking the resource allocation will be done by setting the bits \
+	   in the byte array. The index set will be the resource number allocated.
+	*/
+	var TSData *bitmap.Threadsafe
+	if TSData = bitmap.NewTS(int(EndIDx)); TSData == nil {
+		log.Error("Failed to create a bitmap")
+		return nil, errors.New("Failed to create bitmap")
+	}
+	Resource[POOL] = TSData.Data(false) //we pass false so as the TSData lib api does not do a copy of the data and return
+
+	Value, err := json.Marshal(Resource)
+	if err != nil {
+		log.Errorf("Failed to marshall resource")
+		return nil, err
+	}
+	return Value, err
+}
+func (PONRMgr *PONResourceManager) GetResource(Path string) (map[string]interface{}, error) {
+	/*
+	   Get resource from kv store.
+
+	   :param path: path to get resource
+	   :return: resource if resource present in kv store else None
+	*/
+	//get resource from kv store
+
+	var Value []byte
+	Result := make(map[string]interface{})
+	var Str string
+
+	Resource, err := PONRMgr.KVStore.Get(Path)
+	if (err != nil) || (Resource == nil) {
+		log.Debugf("Resource  unavailable at %s", Path)
+		return nil, err
+	}
+
+	Value, err = ToByte(Resource.Value)
+
+	// decode resource fetched from backend store to dictionary
+	err = json.Unmarshal(Value, &Result)
+	if err != nil {
+		log.Error("Failed to decode resource")
+		return Result, err
+	}
+	/*
+	   resource pool in backend store stored as binary string whereas to
+	   access the pool to generate/release IDs it need to be converted
+	   as BitArray
+	*/
+	Str, err = ToString(Result[POOL])
+	if err != nil {
+		log.Error("Failed to conver to kv pair to string")
+		return Result, err
+	}
+	Decode64, _ := base64.StdEncoding.DecodeString(Str)
+	Result[POOL], err = ToByte(Decode64)
+	if err != nil {
+		log.Error("Failed to convert resource pool to byte")
+		return Result, err
+	}
+
+	return Result, err
+}
+
+func (PONRMgr *PONResourceManager) GetPath(IntfID uint32, ResourceType string) string {
+	/*
+	   Get path for given resource type.
+	   :param pon_intf_id: OLT PON interface id
+	   :param resource_type: String to identify type of resource
+	   :return: path for given resource type
+	*/
+
+	/*
+	   Get the shared pool for the given resource type.
+	   all the resource ranges and the shared resource maps are initialized during the init.
+	*/
+	SharedPoolID := PONRMgr.PonResourceRanges[PONRMgr.SharedIdxByType[ResourceType]].(uint32)
+	if SharedPoolID != 0 {
+		IntfID = SharedPoolID
+	}
+	var Path string
+	if ResourceType == ONU_ID {
+		Path = fmt.Sprintf(ONU_ID_POOL_PATH, PONRMgr.DeviceID, IntfID)
+	} else if ResourceType == ALLOC_ID {
+		Path = fmt.Sprintf(ALLOC_ID_POOL_PATH, PONRMgr.DeviceID, IntfID)
+	} else if ResourceType == GEMPORT_ID {
+		Path = fmt.Sprintf(GEMPORT_ID_POOL_PATH, PONRMgr.DeviceID, IntfID)
+	} else if ResourceType == FLOW_ID {
+		Path = fmt.Sprintf(FLOW_ID_POOL_PATH, PONRMgr.DeviceID, IntfID)
+	} else {
+		log.Error("Invalid resource pool identifier")
+	}
+	return Path
+}
+
+func (PONRMgr *PONResourceManager) GetResourceID(IntfID uint32, ResourceType string, NumIDs uint32) ([]uint32, error) {
+	/*
+	   Create alloc/gemport/onu/flow id for given OLT PON interface.
+	   :param pon_intf_id: OLT PON interface id
+	   :param resource_type: String to identify type of resource
+	   :param num_of_id: required number of ids
+	   :return list/uint32/None: list, uint32 or None if resource type is
+	    alloc_id/gemport_id, onu_id or invalid type respectively
+	*/
+	if NumIDs < 1 {
+		log.Error("Invalid number of resources requested")
+		return nil, errors.New(fmt.Sprintf("Invalid number of resources requested %d", NumIDs))
+	}
+	// delegate to the master instance if sharing enabled across instances
+
+	SharedResourceMgr := PONRMgr.SharedResourceMgrs[PONRMgr.SharedIdxByType[ResourceType]]
+	if SharedResourceMgr != nil && PONRMgr != SharedResourceMgr {
+		return SharedResourceMgr.GetResourceID(IntfID, ResourceType, NumIDs)
+	}
+	log.Debugf("Fetching resource from %s rsrc mgr for resource %s", PONRMgr.Globalorlocal, ResourceType)
+
+	Path := PONRMgr.GetPath(IntfID, ResourceType)
+	if Path == "" {
+		log.Errorf("Failed to get path for resource type %s", ResourceType)
+		return nil, errors.New(fmt.Sprintf("Failed to get path for resource type %s", ResourceType))
+	}
+	log.Debugf("Get resource for type %s on path %s", ResourceType, Path)
+	var Result []uint32
+	var NextID uint32
+	Resource, err := PONRMgr.GetResource(Path)
+	if (err == nil) && (ResourceType == ONU_ID) || (ResourceType == FLOW_ID) {
+		if NextID, err = PONRMgr.GenerateNextID(Resource); err != nil {
+			log.Error("Failed to Generate ID")
+			return Result, err
+		}
+		Result = append(Result, NextID)
+	} else if (err == nil) && ((ResourceType == GEMPORT_ID) || (ResourceType == ALLOC_ID)) {
+		if NumIDs == 1 {
+			if NextID, err = PONRMgr.GenerateNextID(Resource); err != nil {
+				log.Error("Failed to Generate ID")
+				return Result, err
+			}
+			Result = append(Result, NextID)
+		} else {
+			for NumIDs > 0 {
+				if NextID, err = PONRMgr.GenerateNextID(Resource); err != nil {
+					log.Error("Failed to Generate ID")
+					return Result, err
+				}
+				Result = append(Result, NextID)
+				NumIDs--
+			}
+		}
+	} else {
+		log.Error("get resource failed")
+		return Result, err
+	}
+
+	//Update resource in kv store
+	if PONRMgr.UpdateResource(Path, Resource) != nil {
+		log.Errorf("Failed to update resource %s", Path)
+		return nil, errors.New(fmt.Sprintf("Failed to update resource %s", Path))
+	}
+	return Result, nil
+}
+
+func checkValidResourceType(ResourceType string) bool {
+	KnownResourceTypes := []string{ONU_ID, ALLOC_ID, GEMPORT_ID, FLOW_ID}
+
+	for _, v := range KnownResourceTypes {
+		if v == ResourceType {
+			return true
+		}
+	}
+	return false
+}
+
+func (PONRMgr *PONResourceManager) FreeResourceID(IntfID uint32, ResourceType string, ReleaseContent []uint32) bool {
+	/*
+	   Release alloc/gemport/onu/flow id for given OLT PON interface.
+	   :param pon_intf_id: OLT PON interface id
+	   :param resource_type: String to identify type of resource
+	   :param release_content: required number of ids
+	   :return boolean: True if all IDs in given release_content release else False
+	*/
+	if checkValidResourceType(ResourceType) == false {
+		log.Error("Invalid resource type")
+		return false
+	}
+	if ReleaseContent == nil {
+		log.Debug("Nothing to release")
+		return true
+	}
+	// delegate to the master instance if sharing enabled across instances
+	SharedResourceMgr := PONRMgr.SharedResourceMgrs[PONRMgr.SharedIdxByType[ResourceType]]
+	if SharedResourceMgr != nil && PONRMgr != SharedResourceMgr {
+		return SharedResourceMgr.FreeResourceID(IntfID, ResourceType, ReleaseContent)
+	}
+	Path := PONRMgr.GetPath(IntfID, ResourceType)
+	if Path == "" {
+		log.Error("Failed to get path")
+		return false
+	}
+	Resource, err := PONRMgr.GetResource(Path)
+	if err != nil {
+		log.Error("Failed to get resource")
+		return false
+	}
+	for _, Val := range ReleaseContent {
+		PONRMgr.ReleaseID(Resource, Val)
+	}
+	if PONRMgr.UpdateResource(Path, Resource) != nil {
+		log.Errorf("Free resource for %s failed", Path)
+		return false
+	}
+	return true
+}
+
+func (PONRMgr *PONResourceManager) UpdateResource(Path string, Resource map[string]interface{}) error {
+	/*
+	   Update resource in resource kv store.
+	   :param path: path to update resource
+	   :param resource: resource need to be updated
+	   :return boolean: True if resource updated in kv store else False
+	*/
+	// TODO resource[POOL] = resource[POOL].bin
+	Value, err := json.Marshal(Resource)
+	if err != nil {
+		log.Error("failed to Marshal")
+		return err
+	}
+	err = PONRMgr.KVStore.Put(Path, Value)
+	if err != nil {
+		log.Error("failed to put data to kv store %s", Path)
+		return err
+	}
+	return nil
+}
+
+func (PONRMgr *PONResourceManager) ClearResourceIDPool(IntfID uint32, ResourceType string) bool {
+	/*
+	   Clear Resource Pool for a given Resource Type on a given PON Port.
+	   :return boolean: True if removed else False
+	*/
+
+	// delegate to the master instance if sharing enabled across instances
+	SharedResourceMgr := PONRMgr.SharedResourceMgrs[PONRMgr.SharedIdxByType[ResourceType]]
+	if SharedResourceMgr != nil && PONRMgr != SharedResourceMgr {
+		return SharedResourceMgr.ClearResourceIDPool(IntfID, ResourceType)
+	}
+	Path := PONRMgr.GetPath(IntfID, ResourceType)
+	if Path == "" {
+		log.Error("Failed to get path")
+		return false
+	}
+
+	if err := PONRMgr.KVStore.Delete(Path); err != nil {
+		log.Errorf("Failed to delete resource %s", Path)
+		return false
+	}
+	log.Debugf("Cleared resource %s", Path)
+	return true
+}
+
+func (PONRMgr PONResourceManager) InitResourceMap(PONIntfONUID string) {
+	/*
+	   Initialize resource map
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	*/
+	// initialize pon_intf_onu_id tuple to alloc_ids map
+	AllocIDPath := fmt.Sprintf(ALLOC_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, PONIntfONUID)
+	var AllocIDs []byte
+	Result := PONRMgr.KVStore.Put(AllocIDPath, AllocIDs)
+	if Result != nil {
+		log.Error("Failed to update the KV store")
+		return
+	}
+	// initialize pon_intf_onu_id tuple to gemport_ids map
+	GEMPortIDPath := fmt.Sprintf(GEMPORT_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, PONIntfONUID)
+	var GEMPortIDs []byte
+	Result = PONRMgr.KVStore.Put(GEMPortIDPath, GEMPortIDs)
+	if Result != nil {
+		log.Error("Failed to update the KV store")
+		return
+	}
+}
+
+func (PONRMgr PONResourceManager) RemoveResourceMap(PONIntfONUID string) bool {
+	/*
+	   Remove resource map
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	*/
+	// remove pon_intf_onu_id tuple to alloc_ids map
+	var err error
+	AllocIDPath := fmt.Sprintf(ALLOC_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, PONIntfONUID)
+	if err = PONRMgr.KVStore.Delete(AllocIDPath); err != nil {
+		log.Errorf("Failed to remove resource %s", AllocIDPath)
+		return false
+	}
+	// remove pon_intf_onu_id tuple to gemport_ids map
+	GEMPortIDPath := fmt.Sprintf(GEMPORT_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, PONIntfONUID)
+	err = PONRMgr.KVStore.Delete(GEMPortIDPath)
+	if err != nil {
+		log.Errorf("Failed to remove resource %s", GEMPortIDPath)
+		return false
+	}
+
+	FlowIDPath := fmt.Sprintf(FLOW_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, PONIntfONUID)
+	if FlowIDs, err := PONRMgr.KVStore.List(FlowIDPath); err != nil {
+		for _, Flow := range FlowIDs {
+			FlowIDInfoPath := fmt.Sprintf(FLOW_ID_INFO_PATH, PONRMgr.DeviceID, PONIntfONUID, Flow.Value)
+			if err = PONRMgr.KVStore.Delete(FlowIDInfoPath); err != nil {
+				log.Errorf("Failed to remove resource %s", FlowIDInfoPath)
+				return false
+			}
+		}
+	}
+
+	if err = PONRMgr.KVStore.Delete(FlowIDPath); err != nil {
+		log.Errorf("Failed to remove resource %s", FlowIDPath)
+		return false
+	}
+
+	return true
+}
+
+func (PONRMgr *PONResourceManager) GetCurrentAllocIDForOnu(IntfONUID string) []uint32 {
+	/*
+	   Get currently configured alloc ids for given pon_intf_onu_id
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :return list: List of alloc_ids if available, else None
+	*/
+	Path := fmt.Sprintf(ALLOC_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+
+	var Data []uint32
+	Value, err := PONRMgr.KVStore.Get(Path)
+	if err == nil {
+		if Value != nil {
+			Val, err := ToByte(Value.Value)
+			if err != nil {
+				log.Errorw("Failed to convert into byte array", log.Fields{"error": err})
+				return Data
+			}
+			if err = json.Unmarshal(Val, &Data); err != nil {
+				log.Error("Failed to unmarshal", log.Fields{"error": err})
+				return Data
+			}
+		}
+	}
+	return Data
+}
+
+func (PONRMgr *PONResourceManager) GetCurrentGEMPortIDsForOnu(IntfONUID string) []uint32 {
+	/*
+	   Get currently configured gemport ids for given pon_intf_onu_id
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :return list: List of gemport IDs if available, else None
+	*/
+
+	Path := fmt.Sprintf(GEMPORT_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+	log.Debugf("Getting current gemports for %s", Path)
+	var Data []uint32
+	Value, err := PONRMgr.KVStore.Get(Path)
+	if err == nil {
+		if Value != nil {
+			Val, _ := ToByte(Value.Value)
+			if err = json.Unmarshal(Val, &Data); err != nil {
+				log.Errorw("Failed to unmarshal", log.Fields{"error": err})
+				return Data
+			}
+		}
+	} else {
+		log.Errorf("Failed to get data from kvstore for %s", Path)
+	}
+	return Data
+}
+
+func (PONRMgr *PONResourceManager) GetCurrentFlowIDsForOnu(IntfONUID string) []uint32 {
+	/*
+	   Get currently configured flow ids for given pon_intf_onu_id
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :return list: List of Flow IDs if available, else None
+	*/
+
+	Path := fmt.Sprintf(FLOW_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+
+	var Data []uint32
+	Value, err := PONRMgr.KVStore.Get(Path)
+	if err == nil {
+		if Value != nil {
+			Val, _ := ToByte(Value.Value)
+			if err = json.Unmarshal(Val, &Data); err != nil {
+				log.Error("Failed to unmarshal")
+				return Data
+			}
+		}
+	}
+	return Data
+}
+
+func (PONRMgr *PONResourceManager) GetFlowIDInfo(IntfONUID string, FlowID uint32, Data interface{}) error {
+	/*
+	   Get flow details configured for the ONU.
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param flow_id: Flow Id reference
+	   :param Data: Result
+	   :return error: nil if no error in getting from KV store
+	*/
+
+	Path := fmt.Sprintf(FLOW_ID_INFO_PATH, PONRMgr.DeviceID, IntfONUID, FlowID)
+
+	Value, err := PONRMgr.KVStore.Get(Path)
+	if err == nil {
+		if Value != nil {
+			Val, err := ToByte(Value.Value)
+			if err != nil {
+				log.Errorw("Failed to convert flowinfo into byte array", log.Fields{"error": err})
+				return err
+			}
+			if err = json.Unmarshal(Val, Data); err != nil {
+				log.Errorw("Failed to unmarshal", log.Fields{"error": err})
+				return err
+			}
+		}
+	}
+	return err
+}
+
+func (PONRMgr *PONResourceManager) RemoveFlowIDInfo(IntfONUID string, FlowID uint32) bool {
+	/*
+	   Get flow_id details configured for the ONU.
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param flow_id: Flow Id reference
+	*/
+	Path := fmt.Sprintf(FLOW_ID_INFO_PATH, PONRMgr.DeviceID, IntfONUID, FlowID)
+
+	if err := PONRMgr.KVStore.Delete(Path); err != nil {
+		log.Errorf("Falied to remove resource %s", Path)
+		return false
+	}
+	return true
+}
+
+func (PONRMgr *PONResourceManager) UpdateAllocIdsForOnu(IntfONUID string, AllocIDs []uint32) error {
+	/*
+	   Update currently configured alloc ids for given pon_intf_onu_id
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param alloc_ids: list of alloc ids
+	*/
+	var Value []byte
+	var err error
+	Path := fmt.Sprintf(ALLOC_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+	Value, err = json.Marshal(AllocIDs)
+	if err != nil {
+		log.Error("failed to Marshal")
+		return err
+	}
+
+	if err = PONRMgr.KVStore.Put(Path, Value); err != nil {
+		log.Errorf("Failed to update resource %s", Path)
+		return err
+	}
+	return err
+}
+
+func (PONRMgr *PONResourceManager) UpdateGEMPortIDsForOnu(IntfONUID string, GEMPortIDs []uint32) error {
+	/*
+	   Update currently configured gemport ids for given pon_intf_onu_id
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param gemport_ids: list of gem port ids
+	*/
+
+	var Value []byte
+	var err error
+	Path := fmt.Sprintf(GEMPORT_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+	log.Debugf("Updating gemport ids for %s", Path)
+	Value, err = json.Marshal(GEMPortIDs)
+	if err != nil {
+		log.Error("failed to Marshal")
+		return err
+	}
+
+	if err = PONRMgr.KVStore.Put(Path, Value); err != nil {
+		log.Errorf("Failed to update resource %s", Path)
+		return err
+	}
+	return err
+}
+
+func checkForFlowIDInList(FlowIDList []uint32, FlowID uint32) (bool, uint32) {
+	/*
+	   Check for a flow id in a given list of flow IDs.
+	   :param FLowIDList: List of Flow IDs
+	   :param FlowID: Flowd to check in the list
+	   : return true and the index if present false otherwise.
+	*/
+
+	for idx, _ := range FlowIDList {
+		if FlowID == FlowIDList[idx] {
+			return true, uint32(idx)
+		}
+	}
+	return false, 0
+}
+
+func (PONRMgr *PONResourceManager) UpdateFlowIDForOnu(IntfONUID string, FlowID uint32, Add bool) error {
+	/*
+	   Update the flow_id list of the ONU (add or remove flow_id from the list)
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param flow_id: flow ID
+	   :param add: Boolean flag to indicate whether the flow_id should be
+	               added or removed from the list. Defaults to adding the flow.
+	*/
+	var Value []byte
+	var err error
+	var RetVal bool
+	var IDx uint32
+	Path := fmt.Sprintf(FLOW_ID_RESOURCE_MAP_PATH, PONRMgr.DeviceID, IntfONUID)
+	FlowIDs := PONRMgr.GetCurrentFlowIDsForOnu(IntfONUID)
+
+	if Add {
+		if RetVal, IDx = checkForFlowIDInList(FlowIDs, FlowID); RetVal == true {
+			return err
+		}
+		FlowIDs = append(FlowIDs, FlowID)
+	} else {
+		if RetVal, IDx = checkForFlowIDInList(FlowIDs, FlowID); RetVal == false {
+			return err
+		}
+		// delete the index and shift
+		FlowIDs = append(FlowIDs[:IDx], FlowIDs[IDx+1:]...)
+	}
+	Value, err = json.Marshal(FlowIDs)
+	if err != nil {
+		log.Error("Failed to Marshal")
+		return err
+	}
+
+	if err = PONRMgr.KVStore.Put(Path, Value); err != nil {
+		log.Errorf("Failed to update resource %s", Path)
+		return err
+	}
+	return err
+}
+
+func (PONRMgr *PONResourceManager) UpdateFlowIDInfoForOnu(IntfONUID string, FlowID uint32, FlowData interface{}) error {
+	/*
+	   Update any metadata associated with the flow_id. The flow_data could be json
+	   or any of other data structure. The resource manager doesnt care
+	   :param pon_intf_onu_id: reference of PON interface id and onu id
+	   :param flow_id: Flow ID
+	   :param flow_data: Flow data blob
+	*/
+	var Value []byte
+	var err error
+	Path := fmt.Sprintf(FLOW_ID_INFO_PATH, PONRMgr.DeviceID, IntfONUID, FlowID)
+	Value, err = json.Marshal(FlowData)
+	if err != nil {
+		log.Error("failed to Marshal")
+		return err
+	}
+
+	if err = PONRMgr.KVStore.Put(Path, Value); err != nil {
+		log.Errorf("Failed to update resource %s", Path)
+		return err
+	}
+	return err
+}
+
+func (PONRMgr *PONResourceManager) GenerateNextID(Resource map[string]interface{}) (uint32, error) {
+	/*
+	   Generate unique id having OFFSET as start
+	   :param resource: resource used to generate ID
+	   :return uint32: generated id
+	*/
+	ByteArray, err := ToByte(Resource[POOL])
+	if err != nil {
+		log.Error("Failed to convert resource to byte array")
+		return 0, err
+	}
+	Data := bitmap.TSFromData(ByteArray, false)
+	if Data == nil {
+		log.Error("Failed to get data from byte array")
+		return 0, errors.New("Failed to get data from byte array")
+	}
+
+	Len := Data.Len()
+	var Idx int
+	for Idx = 0; Idx < Len; Idx++ {
+		Val := Data.Get(Idx)
+		if Val == false {
+			break
+		}
+	}
+	Data.Set(Idx, true)
+	res := uint32(Resource[START_IDX].(float64))
+	Resource[POOL] = Data.Data(false)
+	log.Debugf("Generated ID for %d", (uint32(Idx) + res))
+	return (uint32(Idx) + res), err
+}
+
+func (PONRMgr *PONResourceManager) ReleaseID(Resource map[string]interface{}, Id uint32) bool {
+	/*
+	   Release unique id having OFFSET as start index.
+	   :param resource: resource used to release ID
+	   :param unique_id: id need to be released
+	*/
+	ByteArray, err := ToByte(Resource[POOL])
+	if err != nil {
+		log.Error("Failed to convert resource to byte array")
+		return false
+	}
+	Data := bitmap.TSFromData(ByteArray, false)
+	if Data == nil {
+		log.Error("Failed to get resource pool")
+		return false
+	}
+	var Idx uint32
+	Idx = Id - uint32(Resource[START_IDX].(float64))
+	Data.Set(int(Idx), false)
+	Resource[POOL] = Data.Data(false)
+
+	return true
+}
+
+func (PONRMgr *PONResourceManager) GetTechnology() string {
+	return PONRMgr.Technology
+}
+
+func (PONRMgr *PONResourceManager) GetResourceTypeAllocID() string {
+	return ALLOC_ID
+}
+
+func (PONRMgr *PONResourceManager) GetResourceTypeGemPortID() string {
+	return GEMPORT_ID
+}
+
+// ToByte converts an interface value to a []byte.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToByte(value interface{}) ([]byte, error) {
+	switch t := value.(type) {
+	case []byte:
+		return value.([]byte), nil
+	case string:
+		return []byte(value.(string)), nil
+	default:
+		return nil, fmt.Errorf("unexpected-type-%T", t)
+	}
+}
+
+// ToString converts an interface value to a string.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToString(value interface{}) (string, error) {
+	switch t := value.(type) {
+	case []byte:
+		return string(value.([]byte)), nil
+	case string:
+		return value.(string), nil
+	default:
+		return "", fmt.Errorf("unexpected-type-%T", t)
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/4QueueHybridProfileMap1.json b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/4QueueHybridProfileMap1.json
new file mode 100644
index 0000000..d11f8e4
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/4QueueHybridProfileMap1.json
@@ -0,0 +1,141 @@
+ {
+  "name": "4QueueHybridProfileMap1",
+  "profile_type": "XPON",
+  "version": 1,
+  "num_gem_ports": 4,
+  "instance_control": {
+    "onu": "multi-instance",
+    "uni": "single-instance",
+    "max_gem_payload_size": "auto"
+  },
+  "us_scheduler": {
+    "additional_bw": "AdditionalBW_Auto",
+    "direction": "UPSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "Hybrid"
+  },
+  "ds_scheduler": {
+    "additional_bw": "AdditionalBW_Auto",
+    "direction": "DOWNSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "Hybrid"
+  },
+  "upstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "max_threshold": 0,
+        "min_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 75,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ],
+  "downstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 10,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 90,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ]
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/README.md b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/README.md
new file mode 100644
index 0000000..03a396d
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/README.md
@@ -0,0 +1,336 @@
+Technology Profile Management
+Overview
+Technology profiles that are utilized by VOLTHA are stored in a prescribed structure in VOLTHA's key/value store, which is currently etcd. The key structure used to access technology profiles is /voltha/technology_profiles//; where TID is the numeric ID of the technology profile and TECHNOLOGY specifies the technology being utilized by the adapter, e.g. xgspon. While the TID key is a directory, the TECHNOLOGY key should be set to the JSON data that represents the technology profile values.
+
+NOTE: The content of a technology profile represents a contract between the technology profile definition and all adapters that consume that technology profile. The structure and content of the profiles are outside the scope of Technology Profile Management. Technology profile management only specifies the key/value structure in which profiles are stored.
+
+Example JSON :
+
+{
+  "name": "4QueueHybridProfileMap1",
+  "profile_type": "XPON",
+  "version": 1,
+  "num_gem_ports": 4,
+  "instance_control": {
+    "onu": "multi-instance",
+    "uni": "single-instance",
+    "max_gem_payload_size": "auto"
+  },
+  "us_scheduler": {
+    "additional_bw": "auto",
+    "direction": "UPSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "hybrid"
+  },
+  "ds_scheduler": {
+    "additional_bw": "auto",
+    "direction": "DOWNSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "hybrid"
+  },
+  "upstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "max_threshold": 0,
+        "min_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 75,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ],
+  "downstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 10,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 90,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ]
+}
+
+Creating Technology Profiles
+Technology profiles are a simple JSON object. This JSON object can be created using a variety of tools such as Vim, Emacs, or various IDEs. JQ can be a useful tool for validating a JSON object. Once a file is created with the JSON object it can be stored in VOLTHA key/value store using the standard etcd command line tool etcdctl or using an HTTP POST operation using Curl.
+
+Assuming you are in a standard VOLTHA deployment within a Kubernetes cluster you can access the etcd key/value store using kubectl via the PODs named etcd-cluster-0000, etcd-cluster-0001, or etcd-cluster-0002. For the examples in this document etcd-cluster-0000 will be used, but it really shouldn't matter which is used.
+
+ETCD version 3 is being used in techprofile module : Export this variable before using curl operation , export ETCDCTL_API=3 
+
+Assuming the Technology template is stored in a local file 4QueueHybridProfileMap1.json the following commands could be used to store or update the technical template into the proper location in the etcd key/value store:
+
+# Store a Technology template using etcdctl
+jq -c . 4QueueHybridProfileMap1.json | kubectl exec -i etcd-cluster-0000 -- etcdctl set service/voltha/technology_profiles/xgspon/64
+
+jq -c . 4QueueHybridProfileMap1.json |  etcdctl --endpoints=<ETCDIP>:2379 put service/voltha/technology_profiles/xgspon/64
+
+
+# Store a Technology template using curl
+curl -sSL -XPUT http://10.233.53.161:2379/v2/keys/service/voltha/technology_profiles/xgspon/64 -d value="$(jq -c . 4QueueHybridProfileMap1.json)"
+In the examples above, the command jq is used. This command can be installed using standard package management tools on most Linux systems. In the examples the "-c" option is used to compress the JSON. Using this tool is not necessary, and if you choose not to use the tool, you can replace "jq -c ," in the above examples with the "cat" command. More on jq can be found at https://stedolan.github.io/jq/.
+
+Listing Technical Profiles for a given Technology
+While both curl and etcdctl (via kubectl) can be used to list or view the available Technology profiles, etcdctl is easier, and thus will be used in the examples. For listing Technology profiles etcdctl ls is used. In can be used in conjunction with the -r option to recursively list profiles.
+
+
+#List Tech profile 
+etcdctl --endpoints=<EtcdIPAddres>:2379 get  service/voltha/technology_profiles/xgspon/64
+
+
+# Example output
+A specified Technology profile can be viewed with the etcdctl get command. (Again, jq is used for presentation purposes, and is not required)
+
+# Display a specified Technology profile, using jq to pretty print
+kubectl exec -i etcd-cluster-0000 -- etcdctl get /xgspon/64 | jq .
+
+etcdctl --endpoints=<ETCDIP>:2379 get  service/voltha/technology_profiles/xgspon/64
+# Example outpout
+service/voltha/technology_profiles/xgspon/64/uni-1
+{
+  "name": "4QueueHybridProfileMap1",
+  "profile_type": "XPON",
+  "version": 1,
+  "num_gem_ports": 4,
+  "instance_control": {
+    "onu": "multi-instance",
+    "uni": "single-instance",
+    "max_gem_payload_size": "auto"
+  },
+  "us_scheduler": {
+    "additional_bw": "auto",
+    "direction": "UPSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "hybrid"
+  },
+  "ds_scheduler": {
+    "additional_bw": "auto",
+    "direction": "DOWNSTREAM",
+    "priority": 0,
+    "weight": 0,
+    "q_sched_policy": "hybrid"
+  },
+  "upstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "max_threshold": 0,
+        "min_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 75,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ],
+  "downstream_gem_port_attribute_list": [
+    {
+      "pbit_map": "0b00000101",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 4,
+      "weight": 10,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00011010",
+      "aes_encryption": "True",
+      "scheduling_policy": "WRR",
+      "priority_q": 3,
+      "weight": 90,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b00100000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 2,
+      "weight": 0,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    },
+    {
+      "pbit_map": "0b11000000",
+      "aes_encryption": "True",
+      "scheduling_policy": "StrictPriority",
+      "priority_q": 1,
+      "weight": 25,
+      "discard_policy": "TailDrop",
+      "max_q_size": "auto",
+      "discard_config": {
+        "min_threshold": 0,
+        "max_threshold": 0,
+        "max_probability": 0
+      }
+    }
+  ]
+}
+
+#Deleting Technology Profiles
+A technology profile or a technology profile tree can be removed using etcdctl rm.
+
+# Remove a specific technology profile
+kubectl exec -i etcd-cluster-0000 -- etcdctl rm /xgspon/64
+
+# Remove all technology profiles associated with Technology xgspon and ID 64(including the profile ID key)
+kubectl exec -i etcd-cluster-0000 -- etcdctl rm --dir -r /xgspon/64
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/config.go b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/config.go
new file mode 100644
index 0000000..f9655a8
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/config.go
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package techprofile
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/db/model"
+)
+
+// tech profile default constants
+const (
+	defaultTechProfileName        = "Default_1tcont_1gem_Profile"
+	DEFAULT_TECH_PROFILE_TABLE_ID = 64
+	defaultVersion                = 1.0
+	defaultLogLevel               = 0
+	defaultGemportsCount          = 1
+	defaultNumTconts              = 1
+	defaultPbits                  = "0b11111111"
+
+	defaultKVStoreType    = "etcd"
+	defaultKVStoreTimeout = 5 //in seconds
+	defaultKVStoreHost    = "127.0.0.1"
+	defaultKVStorePort    = 2379 // Consul = 8500; Etcd = 2379
+
+	// Tech profile path prefix in kv store
+	defaultKVPathPrefix = "service/voltha/technology_profiles"
+
+	// Tech profile path in kv store
+	defaultTechProfileKVPath = "%s/%d" // <technology>/<tech_profile_tableID>
+
+	// Tech profile instance path in kv store
+	// Format: <technology>/<tech_profile_tableID>/<uni_port_name>
+	defaultTPInstanceKVPath = "%s/%d/%s"
+)
+
+//Tech-Profile JSON String Keys
+// NOTE: Tech profile templeate JSON file should comply with below keys
+const (
+	NAME                               = "name"
+	PROFILE_TYPE                       = "profile_type"
+	VERSION                            = "version"
+	NUM_GEM_PORTS                      = "num_gem_ports"
+	INSTANCE_CONTROL                   = "instance_control"
+	US_SCHEDULER                       = "us_scheduler"
+	DS_SCHEDULER                       = "ds_scheduler"
+	UPSTREAM_GEM_PORT_ATTRIBUTE_LIST   = "upstream_gem_port_attribute_list"
+	DOWNSTREAM_GEM_PORT_ATTRIBUTE_LIST = "downstream_gem_port_attribute_list"
+	ONU                                = "onu"
+	UNI                                = "uni"
+	MAX_GEM_PAYLOAD_SIZE               = "max_gem_payload_size"
+	DIRECTION                          = "direction"
+	ADDITIONAL_BW                      = "additional_bw"
+	PRIORITY                           = "priority"
+	Q_SCHED_POLICY                     = "q_sched_policy"
+	WEIGHT                             = "weight"
+	PBIT_MAP                           = "pbit_map"
+	DISCARD_CONFIG                     = "discard_config"
+	MAX_THRESHOLD                      = "max_threshold"
+	MIN_THRESHOLD                      = "min_threshold"
+	MAX_PROBABILITY                    = "max_probability"
+	DISCARD_POLICY                     = "discard_policy"
+	PRIORITY_Q                         = "priority_q"
+	SCHEDULING_POLICY                  = "scheduling_policy"
+	MAX_Q_SIZE                         = "max_q_size"
+	AES_ENCRYPTION                     = "aes_encryption"
+)
+
+// TechprofileFlags represents the set of configurations used
+type TechProfileFlags struct {
+	KVStoreHost          string
+	KVStorePort          int
+	KVStoreType          string
+	KVStoreTimeout       int
+	KVBackend            *model.Backend
+	TPKVPathPrefix       string
+	TPFileKVPath         string
+	TPInstanceKVPath     string
+	DefaultTPName        string
+	TPVersion            int
+	NumGemPorts          uint32
+	NumTconts            uint32
+	DefaultPbits         []string
+	LogLevel             int
+	DefaultTechProfileID uint32
+	DefaultNumGemPorts   uint32
+	DefaultNumTconts     uint32
+}
+
+func NewTechProfileFlags(KVStoreType string, KVStoreHost string, KVStorePort int) *TechProfileFlags {
+	// initialize with default values
+	var techProfileFlags = TechProfileFlags{
+		KVBackend:            nil,
+		KVStoreHost:          KVStoreHost,
+		KVStorePort:          KVStorePort,
+		KVStoreType:          KVStoreType,
+		KVStoreTimeout:       defaultKVStoreTimeout,
+		DefaultTPName:        defaultTechProfileName,
+		TPKVPathPrefix:       defaultKVPathPrefix,
+		TPVersion:            defaultVersion,
+		TPFileKVPath:         defaultTechProfileKVPath,
+		TPInstanceKVPath:     defaultTPInstanceKVPath,
+		DefaultTechProfileID: DEFAULT_TECH_PROFILE_TABLE_ID,
+		DefaultNumGemPorts:   defaultGemportsCount,
+		DefaultNumTconts:     defaultNumTconts,
+		DefaultPbits:         []string{defaultPbits},
+		LogLevel:             defaultLogLevel,
+	}
+
+	return &techProfileFlags
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile.go b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile.go
new file mode 100644
index 0000000..c8f2aa3
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile.go
@@ -0,0 +1,692 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package techprofile
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+
+	"github.com/opencord/voltha-lib-go/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/pkg/db/model"
+	"github.com/opencord/voltha-lib-go/pkg/log"
+	tp_pb "github.com/opencord/voltha-protos/go/tech_profile"
+)
+
+// Interface to pon resource manager APIs
+type iPonResourceMgr interface {
+	GetResourceID(IntfID uint32, ResourceType string, NumIDs uint32) ([]uint32, error)
+	GetResourceTypeAllocID() string
+	GetResourceTypeGemPortID() string
+	GetTechnology() string
+}
+
+type Direction int32
+
+const (
+	Direction_UPSTREAM      Direction = 0
+	Direction_DOWNSTREAM    Direction = 1
+	Direction_BIDIRECTIONAL Direction = 2
+)
+
+var Direction_name = map[Direction]string{
+	0: "UPSTREAM",
+	1: "DOWNSTREAM",
+	2: "BIDIRECTIONAL",
+}
+
+type SchedulingPolicy int32
+
+const (
+	SchedulingPolicy_WRR            SchedulingPolicy = 0
+	SchedulingPolicy_StrictPriority SchedulingPolicy = 1
+	SchedulingPolicy_Hybrid         SchedulingPolicy = 2
+)
+
+var SchedulingPolicy_name = map[SchedulingPolicy]string{
+	0: "WRR",
+	1: "StrictPriority",
+	2: "Hybrid",
+}
+
+type AdditionalBW int32
+
+const (
+	AdditionalBW_AdditionalBW_None       AdditionalBW = 0
+	AdditionalBW_AdditionalBW_NA         AdditionalBW = 1
+	AdditionalBW_AdditionalBW_BestEffort AdditionalBW = 2
+	AdditionalBW_AdditionalBW_Auto       AdditionalBW = 3
+)
+
+var AdditionalBW_name = map[AdditionalBW]string{
+	0: "AdditionalBW_None",
+	1: "AdditionalBW_NA",
+	2: "AdditionalBW_BestEffort",
+	3: "AdditionalBW_Auto",
+}
+
+type DiscardPolicy int32
+
+const (
+	DiscardPolicy_TailDrop  DiscardPolicy = 0
+	DiscardPolicy_WTailDrop DiscardPolicy = 1
+	DiscardPolicy_Red       DiscardPolicy = 2
+	DiscardPolicy_WRed      DiscardPolicy = 3
+)
+
+var DiscardPolicy_name = map[DiscardPolicy]string{
+	0: "TailDrop",
+	1: "WTailDrop",
+	2: "Red",
+	3: "WRed",
+}
+
+/*
+type InferredAdditionBWIndication int32
+
+const (
+	InferredAdditionBWIndication_InferredAdditionBWIndication_None       InferredAdditionBWIndication = 0
+	InferredAdditionBWIndication_InferredAdditionBWIndication_Assured    InferredAdditionBWIndication = 1
+	InferredAdditionBWIndication_InferredAdditionBWIndication_BestEffort InferredAdditionBWIndication = 2
+)
+
+var InferredAdditionBWIndication_name = map[int32]string{
+	0: "InferredAdditionBWIndication_None",
+	1: "InferredAdditionBWIndication_Assured",
+	2: "InferredAdditionBWIndication_BestEffort",
+}
+*/
+// instance control defaults
+const (
+	defaultOnuInstance    = "multi-instance"
+	defaultUniInstance    = "single-instance"
+	defaultNumGemPorts    = 1
+	defaultGemPayloadSize = "auto"
+)
+
+const MAX_GEM_PAYLOAD = "max_gem_payload_size"
+
+type InstanceControl struct {
+	Onu               string `json:"ONU"`
+	Uni               string `json:"uni"`
+	MaxGemPayloadSize string `json:"max_gem_payload_size"`
+}
+
+// default discard config constants
+const (
+	defaultMinThreshold   = 0
+	defaultMaxThreshold   = 0
+	defaultMaxProbability = 0
+)
+
+type DiscardConfig struct {
+	MinThreshold   int `json:"min_threshold"`
+	MaxThreshold   int `json:"max_threshold"`
+	MaxProbability int `json:"max_probability"`
+}
+
+// default scheduler contants
+const (
+	defaultAdditionalBw     = AdditionalBW_AdditionalBW_BestEffort
+	defaultPriority         = 0
+	defaultWeight           = 0
+	defaultQueueSchedPolicy = SchedulingPolicy_Hybrid
+)
+
+type Scheduler struct {
+	Direction    string `json:"direction"`
+	AdditionalBw string `json:"additional_bw"`
+	Priority     uint32 `json:"priority"`
+	Weight       uint32 `json:"weight"`
+	QSchedPolicy string `json:"q_sched_policy"`
+}
+
+// default GEM attribute constants
+const (
+	defaultAESEncryption  = "True"
+	defaultPriorityQueue  = 0
+	defaultQueueWeight    = 0
+	defaultMaxQueueSize   = "auto"
+	defaultdropPolicy     = DiscardPolicy_TailDrop
+	defaultSchedulePolicy = SchedulingPolicy_WRR
+)
+
+type GemPortAttribute struct {
+	MaxQueueSize     string        `json:"max_q_size"`
+	PbitMap          string        `json:"pbit_map"`
+	AesEncryption    string        `json:"aes_encryption"`
+	SchedulingPolicy string        `json:"scheduling_policy"`
+	PriorityQueue    uint32        `json:"priority_q"`
+	Weight           uint32        `json:"weight"`
+	DiscardPolicy    string        `json:"discard_policy"`
+	DiscardConfig    DiscardConfig `json:"discard_config"`
+}
+
+type iScheduler struct {
+	AllocID      uint32 `json:"alloc_id"`
+	Direction    string `json:"direction"`
+	AdditionalBw string `json:"additional_bw"`
+	Priority     uint32 `json:"priority"`
+	Weight       uint32 `json:"weight"`
+	QSchedPolicy string `json:"q_sched_policy"`
+}
+type iGemPortAttribute struct {
+	GemportID        uint32        `json:"gemport_id"`
+	MaxQueueSize     string        `json:"max_q_size"`
+	PbitMap          string        `json:"pbit_map"`
+	AesEncryption    string        `json:"aes_encryption"`
+	SchedulingPolicy string        `json:"scheduling_policy"`
+	PriorityQueue    uint32        `json:"priority_q"`
+	Weight           uint32        `json:"weight"`
+	DiscardPolicy    string        `json:"discard_policy"`
+	DiscardConfig    DiscardConfig `json:"discard_config"`
+}
+
+type TechProfileMgr struct {
+	config      *TechProfileFlags
+	resourceMgr iPonResourceMgr
+}
+type DefaultTechProfile struct {
+	Name                           string             `json:"name"`
+	ProfileType                    string             `json:"profile_type"`
+	Version                        int                `json:"version"`
+	NumGemPorts                    uint32             `json:"num_gem_ports"`
+	InstanceCtrl                   InstanceControl    `json:"instance_control"`
+	UsScheduler                    Scheduler          `json:"us_scheduler"`
+	DsScheduler                    Scheduler          `json:"ds_scheduler"`
+	UpstreamGemPortAttributeList   []GemPortAttribute `json:"upstream_gem_port_attribute_list"`
+	DownstreamGemPortAttributeList []GemPortAttribute `json:"downstream_gem_port_attribute_list"`
+}
+type TechProfile struct {
+	Name                           string              `json:"name"`
+	SubscriberIdentifier           string              `json:"subscriber_identifier"`
+	ProfileType                    string              `json:"profile_type"`
+	Version                        int                 `json:"version"`
+	NumGemPorts                    uint32              `json:"num_gem_ports"`
+	NumTconts                      uint32              `json:"num_of_tconts"`
+	InstanceCtrl                   InstanceControl     `json:"instance_control"`
+	UsScheduler                    iScheduler          `json:"us_scheduler"`
+	DsScheduler                    iScheduler          `json:"ds_scheduler"`
+	UpstreamGemPortAttributeList   []iGemPortAttribute `json:"upstream_gem_port_attribute_list"`
+	DownstreamGemPortAttributeList []iGemPortAttribute `json:"downstream_gem_port_attribute_list"`
+}
+
+func (t *TechProfileMgr) SetKVClient() *model.Backend {
+	addr := t.config.KVStoreHost + ":" + strconv.Itoa(t.config.KVStorePort)
+	kvClient, err := newKVClient(t.config.KVStoreType, addr, t.config.KVStoreTimeout)
+	if err != nil {
+		log.Errorw("failed-to-create-kv-client",
+			log.Fields{
+				"type": t.config.KVStoreType, "host": t.config.KVStoreHost, "port": t.config.KVStorePort,
+				"timeout": t.config.KVStoreTimeout, "prefix": t.config.TPKVPathPrefix,
+				"error": err.Error(),
+			})
+		return nil
+	}
+	return &model.Backend{
+		Client:     kvClient,
+		StoreType:  t.config.KVStoreType,
+		Host:       t.config.KVStoreHost,
+		Port:       t.config.KVStorePort,
+		Timeout:    t.config.KVStoreTimeout,
+		PathPrefix: t.config.TPKVPathPrefix}
+
+	/* TODO : Make sure direct call to NewBackend is working fine with backend , currently there is some
+	            issue between kv store and backend , core is not calling NewBackend directly
+		   kv := model.NewBackend(t.config.KVStoreType, t.config.KVStoreHost, t.config.KVStorePort,
+										t.config.KVStoreTimeout,  kvStoreTechProfilePathPrefix)
+	*/
+}
+
+func newKVClient(storeType string, address string, timeout int) (kvstore.Client, error) {
+
+	log.Infow("kv-store", log.Fields{"storeType": storeType, "address": address})
+	switch storeType {
+	case "consul":
+		return kvstore.NewConsulClient(address, timeout)
+	case "etcd":
+		return kvstore.NewEtcdClient(address, timeout)
+	}
+	return nil, errors.New("unsupported-kv-store")
+}
+
+func NewTechProfile(resourceMgr iPonResourceMgr, KVStoreType string, KVStoreHost string, KVStorePort int) (*TechProfileMgr, error) {
+	var techprofileObj TechProfileMgr
+	log.Debug("Initializing techprofile Manager")
+	techprofileObj.config = NewTechProfileFlags(KVStoreType, KVStoreHost, KVStorePort)
+	techprofileObj.config.KVBackend = techprofileObj.SetKVClient()
+	if techprofileObj.config.KVBackend == nil {
+		log.Error("Failed to initialize KV backend\n")
+		return nil, errors.New("KV backend init failed")
+	}
+	techprofileObj.resourceMgr = resourceMgr
+	log.Debug("Initializing techprofile object instance success")
+	return &techprofileObj, nil
+}
+
+func (t *TechProfileMgr) GetTechProfileInstanceKVPath(techProfiletblID uint32, uniPortName string) string {
+	return fmt.Sprintf(t.config.TPInstanceKVPath, t.resourceMgr.GetTechnology(), techProfiletblID, uniPortName)
+}
+
+func (t *TechProfileMgr) GetTPInstanceFromKVStore(techProfiletblID uint32, path string) (*TechProfile, error) {
+	var KvTpIns TechProfile
+	var resPtr *TechProfile = &KvTpIns
+	var err error
+	/*path := t.GetTechProfileInstanceKVPath(techProfiletblID, uniPortName)*/
+	log.Infow("Getting tech profile instance from KV store", log.Fields{"path": path})
+	kvresult, err := t.config.KVBackend.Get(path)
+	if err != nil {
+		log.Errorw("Error while fetching tech-profile instance  from KV backend", log.Fields{"key": path})
+		return nil, err
+	}
+	if kvresult == nil {
+		log.Infow("Tech profile does not exist in KV store", log.Fields{"key": path})
+		resPtr = nil
+	} else {
+		if value, err := kvstore.ToByte(kvresult.Value); err == nil {
+			if err = json.Unmarshal(value, resPtr); err != nil {
+				log.Errorw("Error while unmarshal KV result", log.Fields{"key": path, "value": value})
+			}
+		}
+	}
+	return resPtr, err
+}
+
+func (t *TechProfileMgr) addTechProfInstanceToKVStore(techProfiletblID uint32, uniPortName string, tpInstance *TechProfile) error {
+	path := t.GetTechProfileInstanceKVPath(techProfiletblID, uniPortName)
+	log.Debugw("Adding techprof instance to kvstore", log.Fields{"key": path, "tpinstance": tpInstance})
+	tpInstanceJson, err := json.Marshal(*tpInstance)
+	if err == nil {
+		// Backend will convert JSON byte array into string format
+		log.Debugw("Storing tech profile instance to KV Store", log.Fields{"key": path, "val": tpInstanceJson})
+		err = t.config.KVBackend.Put(path, tpInstanceJson)
+	} else {
+		log.Errorw("Error in marshaling into Json format", log.Fields{"key": path, "tpinstance": tpInstance})
+	}
+	return err
+}
+func (t *TechProfileMgr) getTPFromKVStore(techProfiletblID uint32) *DefaultTechProfile {
+	var kvtechprofile DefaultTechProfile
+	key := fmt.Sprintf(t.config.TPFileKVPath, t.resourceMgr.GetTechnology(), techProfiletblID)
+	log.Debugw("Getting techprofile from KV store", log.Fields{"techProfiletblID": techProfiletblID, "Key": key})
+	kvresult, err := t.config.KVBackend.Get(key)
+	if err != nil {
+		log.Errorw("Error while fetching value from KV store", log.Fields{"key": key})
+		return nil
+	}
+	if kvresult != nil {
+		/* Backend will return Value in string format,needs to be converted to []byte before unmarshal*/
+		if value, err := kvstore.ToByte(kvresult.Value); err == nil {
+			if err = json.Unmarshal(value, &kvtechprofile); err == nil {
+				log.Debugw("Success fetched techprofile from KV store", log.Fields{"techProfiletblID": techProfiletblID, "value": kvtechprofile})
+				return &kvtechprofile
+			}
+		}
+	}
+	return nil
+}
+func (t *TechProfileMgr) CreateTechProfInstance(techProfiletblID uint32, uniPortName string, intfId uint32) *TechProfile {
+	var tpInstance *TechProfile
+	log.Infow("Creating tech profile instance ", log.Fields{"tableid": techProfiletblID, "uni": uniPortName, "intId": intfId})
+	tp := t.getTPFromKVStore(techProfiletblID)
+	if tp != nil {
+		log.Infow("Creating tech profile instance with profile from KV store", log.Fields{"tpid": techProfiletblID})
+	} else {
+		tp = t.getDefaultTechProfile()
+		log.Infow("Creating tech profile instance with default values", log.Fields{"tpid": techProfiletblID})
+	}
+	tpInstance = t.allocateTPInstance(uniPortName, tp, intfId, t.config.DefaultNumTconts)
+	if err := t.addTechProfInstanceToKVStore(techProfiletblID, uniPortName, tpInstance); err != nil {
+		log.Errorw("Error in adding tech profile instance to KV ", log.Fields{"tableid": techProfiletblID, "uni": uniPortName})
+		return nil
+	}
+	log.Infow("Added tech profile instance to KV store successfully ",
+		log.Fields{"tpid": techProfiletblID, "uni": uniPortName, "intfId": intfId})
+	return tpInstance
+}
+
+func (t *TechProfileMgr) DeleteTechProfileInstance(techProfiletblID uint32, uniPortName string) error {
+	path := t.GetTechProfileInstanceKVPath(techProfiletblID, uniPortName)
+	return t.config.KVBackend.Delete(path)
+}
+
+func (t *TechProfileMgr) allocateTPInstance(uniPortName string, tp *DefaultTechProfile, intfId uint32, numOfTconts uint32) *TechProfile {
+
+	var usGemPortAttributeList []iGemPortAttribute
+	var dsGemPortAttributeList []iGemPortAttribute
+	var tcontIDs []uint32
+	var gemPorts []uint32
+	var err error
+
+	log.Infow("Allocating TechProfileMgr instance from techprofile template", log.Fields{"uniPortName": uniPortName, "intfId": intfId, "numOfTconts": numOfTconts, "numGem": tp.NumGemPorts})
+	if numOfTconts > 1 {
+		log.Errorw("Multiple Tconts not supported currently", log.Fields{"uniPortName": uniPortName, "intfId": intfId})
+		return nil
+	}
+	if tcontIDs, err = t.resourceMgr.GetResourceID(intfId, t.resourceMgr.GetResourceTypeAllocID(), numOfTconts); err != nil {
+		log.Errorw("Error getting alloc id from rsrcrMgr", log.Fields{"intfId": intfId, "numTconts": numOfTconts})
+		return nil
+	}
+	log.Debugw("Num GEM ports in TP:", log.Fields{"NumGemPorts": tp.NumGemPorts})
+	if gemPorts, err = t.resourceMgr.GetResourceID(intfId, t.resourceMgr.GetResourceTypeGemPortID(), tp.NumGemPorts); err != nil {
+		log.Errorw("Error getting gemport ids from rsrcrMgr", log.Fields{"intfId": intfId, "numGemports": tp.NumGemPorts})
+		return nil
+	}
+	log.Infow("Allocated tconts and GEM ports successfully", log.Fields{"tconts": tcontIDs, "gemports": gemPorts})
+	for index := 0; index < int(tp.NumGemPorts); index++ {
+		usGemPortAttributeList = append(usGemPortAttributeList,
+			iGemPortAttribute{GemportID: gemPorts[index],
+				MaxQueueSize:     tp.UpstreamGemPortAttributeList[index].MaxQueueSize,
+				PbitMap:          tp.UpstreamGemPortAttributeList[index].PbitMap,
+				AesEncryption:    tp.UpstreamGemPortAttributeList[index].AesEncryption,
+				SchedulingPolicy: tp.UpstreamGemPortAttributeList[index].SchedulingPolicy,
+				PriorityQueue:    tp.UpstreamGemPortAttributeList[index].PriorityQueue,
+				Weight:           tp.UpstreamGemPortAttributeList[index].Weight,
+				DiscardPolicy:    tp.UpstreamGemPortAttributeList[index].DiscardPolicy,
+				DiscardConfig:    tp.UpstreamGemPortAttributeList[index].DiscardConfig})
+		dsGemPortAttributeList = append(dsGemPortAttributeList,
+			iGemPortAttribute{GemportID: gemPorts[index],
+				MaxQueueSize:     tp.DownstreamGemPortAttributeList[index].MaxQueueSize,
+				PbitMap:          tp.DownstreamGemPortAttributeList[index].PbitMap,
+				AesEncryption:    tp.DownstreamGemPortAttributeList[index].AesEncryption,
+				SchedulingPolicy: tp.DownstreamGemPortAttributeList[index].SchedulingPolicy,
+				PriorityQueue:    tp.DownstreamGemPortAttributeList[index].PriorityQueue,
+				Weight:           tp.DownstreamGemPortAttributeList[index].Weight,
+				DiscardPolicy:    tp.DownstreamGemPortAttributeList[index].DiscardPolicy,
+				DiscardConfig:    tp.DownstreamGemPortAttributeList[index].DiscardConfig})
+	}
+	return &TechProfile{
+		SubscriberIdentifier: uniPortName,
+		Name:                 tp.Name,
+		ProfileType:          tp.ProfileType,
+		Version:              tp.Version,
+		NumGemPorts:          tp.NumGemPorts,
+		NumTconts:            numOfTconts,
+		InstanceCtrl:         tp.InstanceCtrl,
+		UsScheduler: iScheduler{
+			AllocID:      tcontIDs[0],
+			Direction:    tp.UsScheduler.Direction,
+			AdditionalBw: tp.UsScheduler.AdditionalBw,
+			Priority:     tp.UsScheduler.Priority,
+			Weight:       tp.UsScheduler.Weight,
+			QSchedPolicy: tp.UsScheduler.QSchedPolicy},
+		DsScheduler: iScheduler{
+			AllocID:      tcontIDs[0],
+			Direction:    tp.DsScheduler.Direction,
+			AdditionalBw: tp.DsScheduler.AdditionalBw,
+			Priority:     tp.DsScheduler.Priority,
+			Weight:       tp.DsScheduler.Weight,
+			QSchedPolicy: tp.DsScheduler.QSchedPolicy},
+		UpstreamGemPortAttributeList:   usGemPortAttributeList,
+		DownstreamGemPortAttributeList: dsGemPortAttributeList}
+}
+
+func (t *TechProfileMgr) getDefaultTechProfile() *DefaultTechProfile {
+
+	var usGemPortAttributeList []GemPortAttribute
+	var dsGemPortAttributeList []GemPortAttribute
+
+	for _, pbit := range t.config.DefaultPbits {
+		log.Debugw("Creating GEM port", log.Fields{"pbit": pbit})
+		usGemPortAttributeList = append(usGemPortAttributeList,
+			GemPortAttribute{
+				MaxQueueSize:     defaultMaxQueueSize,
+				PbitMap:          pbit,
+				AesEncryption:    defaultAESEncryption,
+				SchedulingPolicy: SchedulingPolicy_name[defaultSchedulePolicy],
+				PriorityQueue:    defaultPriorityQueue,
+				Weight:           defaultQueueWeight,
+				DiscardPolicy:    DiscardPolicy_name[defaultdropPolicy],
+				DiscardConfig: DiscardConfig{
+					MinThreshold:   defaultMinThreshold,
+					MaxThreshold:   defaultMaxThreshold,
+					MaxProbability: defaultMaxProbability}})
+		dsGemPortAttributeList = append(dsGemPortAttributeList,
+			GemPortAttribute{
+				MaxQueueSize:     defaultMaxQueueSize,
+				PbitMap:          pbit,
+				AesEncryption:    defaultAESEncryption,
+				SchedulingPolicy: SchedulingPolicy_name[defaultSchedulePolicy],
+				PriorityQueue:    defaultPriorityQueue,
+				Weight:           defaultQueueWeight,
+				DiscardPolicy:    DiscardPolicy_name[defaultdropPolicy],
+				DiscardConfig: DiscardConfig{
+					MinThreshold:   defaultMinThreshold,
+					MaxThreshold:   defaultMaxThreshold,
+					MaxProbability: defaultMaxProbability}})
+	}
+	return &DefaultTechProfile{
+		Name:        t.config.DefaultTPName,
+		ProfileType: t.resourceMgr.GetTechnology(),
+		Version:     t.config.TPVersion,
+		NumGemPorts: uint32(len(usGemPortAttributeList)),
+		InstanceCtrl: InstanceControl{
+			Onu:               defaultOnuInstance,
+			Uni:               defaultUniInstance,
+			MaxGemPayloadSize: defaultGemPayloadSize},
+		UsScheduler: Scheduler{
+			Direction:    Direction_name[Direction_UPSTREAM],
+			AdditionalBw: AdditionalBW_name[defaultAdditionalBw],
+			Priority:     defaultPriority,
+			Weight:       defaultWeight,
+			QSchedPolicy: SchedulingPolicy_name[defaultQueueSchedPolicy]},
+		DsScheduler: Scheduler{
+			Direction:    Direction_name[Direction_DOWNSTREAM],
+			AdditionalBw: AdditionalBW_name[defaultAdditionalBw],
+			Priority:     defaultPriority,
+			Weight:       defaultWeight,
+			QSchedPolicy: SchedulingPolicy_name[defaultQueueSchedPolicy]},
+		UpstreamGemPortAttributeList:   usGemPortAttributeList,
+		DownstreamGemPortAttributeList: dsGemPortAttributeList}
+}
+
+func (t *TechProfileMgr) GetprotoBufParamValue(paramType string, paramKey string) int32 {
+	var result int32 = -1
+
+	if paramType == "direction" {
+		for key, val := range tp_pb.Direction_value {
+			if key == paramKey {
+				result = val
+			}
+		}
+	} else if paramType == "discard_policy" {
+		for key, val := range tp_pb.DiscardPolicy_value {
+			if key == paramKey {
+				result = val
+			}
+		}
+	} else if paramType == "sched_policy" {
+		for key, val := range tp_pb.SchedulingPolicy_value {
+			if key == paramKey {
+				log.Debugw("Got value in proto", log.Fields{"key": key, "value": val})
+				result = val
+			}
+		}
+	} else if paramType == "additional_bw" {
+		for key, val := range tp_pb.AdditionalBW_value {
+			if key == paramKey {
+				result = val
+			}
+		}
+	} else {
+		log.Error("Could not find proto parameter", log.Fields{"paramType": paramType, "key": paramKey})
+		return -1
+	}
+	log.Debugw("Got value in proto", log.Fields{"key": paramKey, "value": result})
+	return result
+}
+
+func (t *TechProfileMgr) GetUsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig {
+	dir := tp_pb.Direction(t.GetprotoBufParamValue("direction", tpInstance.UsScheduler.Direction))
+	if dir == -1 {
+		log.Fatal("Error in getting Proto for direction for upstream scheduler")
+		return nil
+	}
+	bw := tp_pb.AdditionalBW(t.GetprotoBufParamValue("additional_bw", tpInstance.UsScheduler.AdditionalBw))
+	if bw == -1 {
+		log.Fatal("Error in getting Proto for bandwidth for upstream scheduler")
+		return nil
+	}
+	policy := tp_pb.SchedulingPolicy(t.GetprotoBufParamValue("sched_policy", tpInstance.UsScheduler.QSchedPolicy))
+	if policy == -1 {
+		log.Fatal("Error in getting Proto for scheduling policy for upstream scheduler")
+		return nil
+	}
+	return &tp_pb.SchedulerConfig{
+		Direction:    dir,
+		AdditionalBw: bw,
+		Priority:     tpInstance.UsScheduler.Priority,
+		Weight:       tpInstance.UsScheduler.Weight,
+		SchedPolicy:  policy}
+}
+
+func (t *TechProfileMgr) GetDsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig {
+
+	dir := tp_pb.Direction(t.GetprotoBufParamValue("direction", tpInstance.DsScheduler.Direction))
+	if dir == -1 {
+		log.Fatal("Error in getting Proto for direction for downstream scheduler")
+		return nil
+	}
+	bw := tp_pb.AdditionalBW(t.GetprotoBufParamValue("additional_bw", tpInstance.DsScheduler.AdditionalBw))
+	if bw == -1 {
+		log.Fatal("Error in getting Proto for bandwidth for downstream scheduler")
+		return nil
+	}
+	policy := tp_pb.SchedulingPolicy(t.GetprotoBufParamValue("sched_policy", tpInstance.DsScheduler.QSchedPolicy))
+	if policy == -1 {
+		log.Fatal("Error in getting Proto for scheduling policy for downstream scheduler")
+		return nil
+	}
+
+	return &tp_pb.SchedulerConfig{
+		Direction:    dir,
+		AdditionalBw: bw,
+		Priority:     tpInstance.DsScheduler.Priority,
+		Weight:       tpInstance.DsScheduler.Weight,
+		SchedPolicy:  policy}
+}
+
+func (t *TechProfileMgr) GetTrafficScheduler(tpInstance *TechProfile, SchedCfg *tp_pb.SchedulerConfig,
+	ShapingCfg *tp_pb.TrafficShapingInfo) *tp_pb.TrafficScheduler {
+
+	tSched := &tp_pb.TrafficScheduler{
+		Direction:          SchedCfg.Direction,
+		AllocId:            tpInstance.UsScheduler.AllocID,
+		TrafficShapingInfo: ShapingCfg,
+		Scheduler:          SchedCfg}
+
+	return tSched
+}
+
+func (tpm *TechProfileMgr) GetTrafficQueues(tp *TechProfile, Dir tp_pb.Direction) []*tp_pb.TrafficQueue {
+
+	var encryp bool
+	if Dir == tp_pb.Direction_UPSTREAM {
+		// upstream GEM ports
+		NumGemPorts := len(tp.UpstreamGemPortAttributeList)
+		GemPorts := make([]*tp_pb.TrafficQueue, 0)
+		for Count := 0; Count < NumGemPorts; Count++ {
+			if tp.UpstreamGemPortAttributeList[Count].AesEncryption == "True" {
+				encryp = true
+			} else {
+				encryp = false
+			}
+			GemPorts = append(GemPorts, &tp_pb.TrafficQueue{
+				Direction:     tp_pb.Direction(tpm.GetprotoBufParamValue("direction", tp.UsScheduler.Direction)),
+				GemportId:     tp.UpstreamGemPortAttributeList[Count].GemportID,
+				PbitMap:       tp.UpstreamGemPortAttributeList[Count].PbitMap,
+				AesEncryption: encryp,
+				SchedPolicy:   tp_pb.SchedulingPolicy(tpm.GetprotoBufParamValue("sched_policy", tp.UpstreamGemPortAttributeList[Count].SchedulingPolicy)),
+				Priority:      tp.UpstreamGemPortAttributeList[Count].PriorityQueue,
+				Weight:        tp.UpstreamGemPortAttributeList[Count].Weight,
+				DiscardPolicy: tp_pb.DiscardPolicy(tpm.GetprotoBufParamValue("discard_policy", tp.UpstreamGemPortAttributeList[Count].DiscardPolicy)),
+			})
+		}
+		log.Debugw("Upstream Traffic queue list ", log.Fields{"queuelist": GemPorts})
+		return GemPorts
+	} else if Dir == tp_pb.Direction_DOWNSTREAM {
+		//downstream GEM ports
+		NumGemPorts := len(tp.DownstreamGemPortAttributeList)
+		GemPorts := make([]*tp_pb.TrafficQueue, 0)
+		for Count := 0; Count < NumGemPorts; Count++ {
+			if tp.DownstreamGemPortAttributeList[Count].AesEncryption == "True" {
+				encryp = true
+			} else {
+				encryp = false
+			}
+			GemPorts = append(GemPorts, &tp_pb.TrafficQueue{
+				Direction:     tp_pb.Direction(tpm.GetprotoBufParamValue("direction", tp.DsScheduler.Direction)),
+				GemportId:     tp.DownstreamGemPortAttributeList[Count].GemportID,
+				PbitMap:       tp.DownstreamGemPortAttributeList[Count].PbitMap,
+				AesEncryption: encryp,
+				SchedPolicy:   tp_pb.SchedulingPolicy(tpm.GetprotoBufParamValue("sched_policy", tp.DownstreamGemPortAttributeList[Count].SchedulingPolicy)),
+				Priority:      tp.DownstreamGemPortAttributeList[Count].PriorityQueue,
+				Weight:        tp.DownstreamGemPortAttributeList[Count].Weight,
+				DiscardPolicy: tp_pb.DiscardPolicy(tpm.GetprotoBufParamValue("discard_policy", tp.DownstreamGemPortAttributeList[Count].DiscardPolicy)),
+			})
+		}
+		log.Debugw("Downstream Traffic queue list ", log.Fields{"queuelist": GemPorts})
+		return GemPorts
+	}
+	return nil
+}
+
+func (tpm *TechProfileMgr) GetUsTrafficScheduler(tp *TechProfile) *tp_pb.TrafficScheduler {
+	UsScheduler := tpm.GetUsScheduler(tp)
+
+	return &tp_pb.TrafficScheduler{Direction: UsScheduler.Direction,
+		AllocId:   tp.UsScheduler.AllocID,
+		Scheduler: UsScheduler}
+}
+
+func (t *TechProfileMgr) GetGemportIDForPbit(tp *TechProfile, Dir tp_pb.Direction, pbit uint32) uint32 {
+	/*
+	   Function to get the Gemport ID mapped to a pbit.
+	*/
+	if Dir == tp_pb.Direction_UPSTREAM {
+		// upstream GEM ports
+		NumGemPorts := len(tp.UpstreamGemPortAttributeList)
+		for Count := 0; Count < NumGemPorts; Count++ {
+			NumPbitMaps := len(tp.UpstreamGemPortAttributeList[Count].PbitMap)
+			for ICount := 2; ICount < NumPbitMaps; ICount++ {
+				if p, err := strconv.Atoi(string(tp.UpstreamGemPortAttributeList[Count].PbitMap[ICount])); err == nil {
+					if uint32(ICount-2) == pbit && p == 1 { // Check this p-bit is set
+						log.Debugw("Found-US-GEMport-for-Pcp", log.Fields{"pbit": pbit, "GEMport": tp.UpstreamGemPortAttributeList[Count].GemportID})
+						return tp.UpstreamGemPortAttributeList[Count].GemportID
+					}
+				}
+			}
+		}
+	} else if Dir == tp_pb.Direction_DOWNSTREAM {
+		//downstream GEM ports
+		NumGemPorts := len(tp.DownstreamGemPortAttributeList)
+		for Count := 0; Count < NumGemPorts; Count++ {
+			NumPbitMaps := len(tp.DownstreamGemPortAttributeList[Count].PbitMap)
+			for ICount := 2; ICount < NumPbitMaps; ICount++ {
+				if p, err := strconv.Atoi(string(tp.DownstreamGemPortAttributeList[Count].PbitMap[ICount])); err == nil {
+					if uint32(ICount-2) == pbit && p == 1 { // Check this p-bit is set
+						log.Debugw("Found-DS-GEMport-for-Pcp", log.Fields{"pbit": pbit, "GEMport": tp.DownstreamGemPortAttributeList[Count].GemportID})
+						return tp.DownstreamGemPortAttributeList[Count].GemportID
+					}
+				}
+			}
+		}
+	}
+	log.Errorw("No-GemportId-Found-For-Pcp", log.Fields{"pcpVlan": pbit})
+	return 0
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile_if.go b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile_if.go
new file mode 100644
index 0000000..de2fca4
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/pkg/techprofile/tech_profile_if.go
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package techprofile
+
+import (
+	"github.com/opencord/voltha-lib-go/pkg/db/model"
+	tp_pb "github.com/opencord/voltha-protos/go/tech_profile"
+)
+
+type TechProfileIf interface {
+	SetKVClient() *model.Backend
+	GetTechProfileInstanceKVPath(techProfiletblID uint32, uniPortName string) string
+	GetTPInstanceFromKVStore(techProfiletblID uint32, path string) (*TechProfile, error)
+	CreateTechProfInstance(techProfiletblID uint32, uniPortName string, intfId uint32) *TechProfile
+	DeleteTechProfileInstance(techProfiletblID uint32, uniPortName string) error
+	GetprotoBufParamValue(paramType string, paramKey string) int32
+	GetUsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig
+	GetDsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig
+	GetTrafficScheduler(tpInstance *TechProfile, SchedCfg *tp_pb.SchedulerConfig,
+		ShapingCfg *tp_pb.TrafficShapingInfo) *tp_pb.TrafficScheduler
+	GetTrafficQueues(tp *TechProfile, Dir tp_pb.Direction) []*tp_pb.TrafficQueue
+	GetGemportIDForPbit(tp *TechProfile, Dir tp_pb.Direction, pbit uint32) uint32
+}