VOL-1867 move simulated olt from voltha-go to voltha-simolt-adapter
Sourced from voltha-go commit 251a11c0ffe60512318a644cd6ce0dc4e12f4018
Change-Id: I8e7ee4da1fed739b3c461917301d2729a79307f5
diff --git a/cmd/simulated_olt/main.go b/cmd/simulated_olt/main.go
new file mode 100644
index 0000000..f96a056
--- /dev/null
+++ b/cmd/simulated_olt/main.go
@@ -0,0 +1,337 @@
+/*
+ * 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 main
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "github.com/opencord/voltha-go/adapters"
+ com "github.com/opencord/voltha-go/adapters/common"
+ "github.com/opencord/voltha-go/common/log"
+ "github.com/opencord/voltha-go/db/kvstore"
+ "github.com/opencord/voltha-go/kafka"
+ ic "github.com/opencord/voltha-protos/go/inter_container"
+ "github.com/opencord/voltha-protos/go/voltha"
+ ac "github.com/opencord/voltha-simolt-adapter/internal/pkg/adaptercore"
+ "github.com/opencord/voltha-simolt-adapter/internal/pkg/config"
+ "os"
+ "os/signal"
+ "strconv"
+ "syscall"
+ "time"
+)
+
+type adapter struct {
+ instanceId string
+ config *config.AdapterFlags
+ iAdapter adapters.IAdapter
+ kafkaClient kafka.Client
+ kvClient kvstore.Client
+ kip *kafka.InterContainerProxy
+ coreProxy *com.CoreProxy
+ halted bool
+ exitChannel chan int
+ receiverChannels []<-chan *ic.InterContainerMessage
+}
+
+func init() {
+ log.AddPackage(log.JSON, log.DebugLevel, nil)
+}
+
+func newAdapter(cf *config.AdapterFlags) *adapter {
+ var a adapter
+ a.instanceId = cf.InstanceID
+ a.config = cf
+ a.halted = false
+ a.exitChannel = make(chan int, 1)
+ a.receiverChannels = make([]<-chan *ic.InterContainerMessage, 0)
+ return &a
+}
+
+func (a *adapter) start(ctx context.Context) {
+ log.Info("Starting Core Adapter components")
+ var err error
+
+ // Setup KV Client
+ log.Debugw("create-kv-client", log.Fields{"kvstore": a.config.KVStoreType})
+ if err := a.setKVClient(); err != nil {
+ log.Fatal("error-setting-kv-client")
+ }
+
+ // Setup Kafka Client
+ if a.kafkaClient, err = newKafkaClient("sarama", a.config.KafkaAdapterHost, a.config.KafkaAdapterPort); err != nil {
+ log.Fatal("Unsupported-common-client")
+ }
+
+ // Start the common InterContainer Proxy - retries indefinitely
+ if a.kip, err = a.startInterContainerProxy(-1); err != nil {
+ log.Fatal("error-starting-inter-container-proxy")
+ }
+
+ // Create the core proxy to handle requests to the Core
+ a.coreProxy = com.NewCoreProxy(a.kip, a.config.Topic, a.config.CoreTopic)
+
+ // Create the simulated OLT adapter
+ if a.iAdapter, err = a.startSimulatedOLT(ctx, a.kip, a.coreProxy, a.config.OnuNumber); err != nil {
+ log.Fatal("error-starting-inter-container-proxy")
+ }
+
+ // Register the core request handler
+ if err = a.setupRequestHandler(a.instanceId, a.iAdapter, a.coreProxy); err != nil {
+ log.Fatal("error-setting-core-request-handler")
+ }
+
+ // Register this adapter to the Core - retries indefinitely
+ if err = a.registerWithCore(-1); err != nil {
+ log.Fatal("error-registering-with-core")
+ }
+}
+
+func (rw *adapter) stop() {
+ // Stop leadership tracking
+ rw.halted = true
+
+ // send exit signal
+ rw.exitChannel <- 0
+
+ // Cleanup - applies only if we had a kvClient
+ if rw.kvClient != nil {
+ // Release all reservations
+ if err := rw.kvClient.ReleaseAllReservations(); err != nil {
+ log.Infow("fail-to-release-all-reservations", log.Fields{"error": err})
+ }
+ // Close the DB connection
+ rw.kvClient.Close()
+ }
+
+ // TODO: More cleanup
+}
+
+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 newKafkaClient(clientType string, host string, port int) (kafka.Client, error) {
+
+ log.Infow("common-client-type", log.Fields{"client": clientType})
+ switch clientType {
+ case "sarama":
+ return kafka.NewSaramaClient(
+ kafka.Host(host),
+ kafka.Port(port),
+ kafka.ProducerReturnOnErrors(true),
+ kafka.ProducerReturnOnSuccess(true),
+ kafka.ProducerMaxRetries(6),
+ kafka.ProducerRetryBackoff(time.Millisecond*30)), nil
+ }
+ return nil, errors.New("unsupported-client-type")
+}
+
+func (a *adapter) setKVClient() error {
+ addr := a.config.KVStoreHost + ":" + strconv.Itoa(a.config.KVStorePort)
+ client, err := newKVClient(a.config.KVStoreType, addr, a.config.KVStoreTimeout)
+ if err != nil {
+ a.kvClient = nil
+ log.Error(err)
+ return err
+ }
+ a.kvClient = client
+ return nil
+}
+
+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)
+ }
+}
+
+func (a *adapter) startInterContainerProxy(retries int) (*kafka.InterContainerProxy, error) {
+ log.Infow("starting-intercontainer-messaging-proxy", log.Fields{"host": a.config.KafkaAdapterHost,
+ "port": a.config.KafkaAdapterPort, "topic": a.config.Topic})
+ var err error
+ var kip *kafka.InterContainerProxy
+ if kip, err = kafka.NewInterContainerProxy(
+ kafka.InterContainerHost(a.config.KafkaAdapterHost),
+ kafka.InterContainerPort(a.config.KafkaAdapterPort),
+ kafka.MsgClient(a.kafkaClient),
+ kafka.DefaultTopic(&kafka.Topic{Name: a.config.Topic})); err != nil {
+ log.Errorw("fail-to-create-common-proxy", log.Fields{"error": err})
+ return nil, err
+ }
+ count := 0
+ for {
+ if err = kip.Start(); err != nil {
+ log.Warnw("error-starting-messaging-proxy", log.Fields{"error": err})
+ if retries == count {
+ return nil, err
+ }
+ count = +1
+ // Take a nap before retrying
+ time.Sleep(2 * time.Second)
+ } else {
+ break
+ }
+ }
+
+ log.Info("common-messaging-proxy-created")
+ return kip, nil
+}
+
+func (a *adapter) startSimulatedOLT(ctx context.Context, kip *kafka.InterContainerProxy, cp *com.CoreProxy, onuNumber int) (*ac.SimulatedOLT, error) {
+ log.Info("starting-simulated-olt")
+ var err error
+ sOLT := ac.NewSimulatedOLT(ctx, a.kip, cp, onuNumber)
+
+ if err = sOLT.Start(ctx); err != nil {
+ log.Fatalw("error-starting-messaging-proxy", log.Fields{"error": err})
+ return nil, err
+ }
+
+ log.Info("simulated-olt-started")
+ return sOLT, nil
+}
+
+func (a *adapter) setupRequestHandler(coreInstanceId string, iadapter adapters.IAdapter, coreProxy *com.CoreProxy) error {
+ log.Info("setting-request-handler")
+ requestProxy := com.NewRequestHandlerProxy(coreInstanceId, iadapter, coreProxy)
+ if err := a.kip.SubscribeWithRequestHandlerInterface(kafka.Topic{Name: a.config.Topic}, requestProxy); err != nil {
+ log.Errorw("request-handler-setup-failed", log.Fields{"error": err})
+ return err
+
+ }
+ log.Info("request-handler-setup-done")
+ return nil
+}
+
+func (a *adapter) registerWithCore(retries int) error {
+ log.Info("registering-with-core")
+ adapterDescription := &voltha.Adapter{Id: "simulated_olt", Vendor: "simulation Enterprise Inc"}
+ types := []*voltha.DeviceType{{Id: "simulated_olt", Adapter: "simulated_olt", AcceptsAddRemoveFlowUpdates: true}}
+ deviceTypes := &voltha.DeviceTypes{Items: types}
+ count := 0
+ for {
+ if err := a.coreProxy.RegisterAdapter(nil, adapterDescription, deviceTypes); err != nil {
+ log.Warnw("registering-with-core-failed", log.Fields{"error": err})
+ if retries == count {
+ return err
+ }
+ count += 1
+ // Take a nap before retrying
+ time.Sleep(2 * time.Second)
+ } else {
+ break
+ }
+ }
+ log.Info("registered-with-core")
+ return nil
+}
+
+func waitForExit() int {
+ signalChannel := make(chan os.Signal, 1)
+ signal.Notify(signalChannel,
+ syscall.SIGHUP,
+ syscall.SIGINT,
+ syscall.SIGTERM,
+ syscall.SIGQUIT)
+
+ exitChannel := make(chan int)
+
+ go func() {
+ s := <-signalChannel
+ switch s {
+ case syscall.SIGHUP,
+ syscall.SIGINT,
+ syscall.SIGTERM,
+ syscall.SIGQUIT:
+ log.Infow("closing-signal-received", log.Fields{"signal": s})
+ exitChannel <- 0
+ default:
+ log.Infow("unexpected-signal-received", log.Fields{"signal": s})
+ exitChannel <- 1
+ }
+ }()
+
+ code := <-exitChannel
+ return code
+}
+
+func printBanner() {
+ fmt.Println(" ____ _ _ _ _ ___ _ _____ ")
+ fmt.Println("/ ___|(_)_ __ ___ _ _| | __ _| |_ ___ __| |/ _ \\| | |_ _| ")
+ fmt.Println("\\___ \\| | '_ ` _ \\| | | | |/ _` | __/ _ \\/ _` | | | | | | | ")
+ fmt.Println(" ___) | | | | | | | |_| | | (_| | || __/ (_| | |_| | |___| | ")
+ fmt.Println("|____/|_|_| |_| |_|\\__,_|_|\\__,_|\\__\\___|\\__,_|\\___/|_____|_| ")
+ fmt.Println(" ")
+}
+
+func main() {
+ start := time.Now()
+
+ cf := config.NewAdapterFlags()
+ cf.ParseCommandArguments()
+
+ //// Setup logging
+
+ //Setup default logger - applies for packages that do not have specific logger set
+ if _, err := log.SetDefaultLogger(log.JSON, cf.LogLevel, log.Fields{"instanceId": cf.InstanceID}); err != nil {
+ log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
+ }
+
+ // Update all loggers (provisionned via init) with a common field
+ if err := log.UpdateAllLoggers(log.Fields{"instanceId": cf.InstanceID}); err != nil {
+ log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
+ }
+
+ log.SetPackageLogLevel("github.com/opencord/voltha-go/adapters/common", log.DebugLevel)
+
+ defer log.CleanUp()
+
+ // Print banner if specified
+ if cf.Banner {
+ printBanner()
+ }
+
+ log.Infow("config", log.Fields{"config": *cf})
+
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel()
+
+ ad := newAdapter(cf)
+ go ad.start(ctx)
+
+ code := waitForExit()
+ log.Infow("received-a-closing-signal", log.Fields{"code": code})
+
+ // Cleanup before leaving
+ ad.stop()
+
+ elapsed := time.Since(start)
+ log.Infow("run-time", log.Fields{"instanceId": ad.config.InstanceID, "time": elapsed / time.Second})
+}