diff --git a/commands/handler.go b/commands/handler.go
new file mode 100644
index 0000000..01fb091
--- /dev/null
+++ b/commands/handler.go
@@ -0,0 +1,75 @@
+/*
+ * Portions copyright 2019-present Open Networking Foundation
+ * Original copyright 2019-present Ciena Corporation
+ *
+ * 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 commands
+
+import (
+	"github.com/golang/protobuf/proto"
+	"github.com/jhump/protoreflect/desc"
+	"github.com/jhump/protoreflect/dynamic"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+	"io"
+)
+
+type RpcEventHandler struct {
+	Response proto.Message
+	Status   *status.Status
+	Data     []byte
+	Fields   map[string]map[string]interface{}
+}
+
+func (h *RpcEventHandler) OnResolveMethod(*desc.MethodDescriptor) {
+}
+
+func (h *RpcEventHandler) OnSendHeaders(metadata.MD) {
+}
+
+func (h *RpcEventHandler) OnReceiveHeaders(metadata.MD) {
+}
+
+func (h *RpcEventHandler) OnReceiveResponse(m proto.Message) {
+	h.Response = m
+}
+
+func (h *RpcEventHandler) OnReceiveTrailers(s *status.Status, m metadata.MD) {
+	h.Status = s
+}
+
+func (h *RpcEventHandler) GetParams(msg proto.Message) error {
+	dmsg, err := dynamic.AsDynamicMessage(msg)
+	if err != nil {
+		return err
+	}
+
+	//fmt.Printf("MessageName: %s\n", dmsg.XXX_MessageName())
+
+	if h.Fields == nil || len(h.Fields) == 0 {
+		return io.EOF
+	}
+
+	fields, ok := h.Fields[dmsg.XXX_MessageName()]
+	if !ok {
+		return nil
+	}
+
+	for k, v := range fields {
+		dmsg.TrySetFieldByName(k, v)
+	}
+	delete(h.Fields, dmsg.XXX_MessageName())
+
+	return nil
+}