First commit

setup/e2mgr/tools/xappmock/rmr/rmrCgoApi.go

@@ -0,0 +1,106 @@
+//
+// Copyright 2019 AT&T Intellectual Property
+// Copyright 2019 Nokia
+//
+// 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.
+
+//  This source code is part of the near-RT RIC (RAN Intelligent Controller)
+//  platform project (RICP).
+
+
+package rmr
+
+// #cgo LDFLAGS: -L/usr/local/lib -lrmr_nng -lnng
+// #include <rmr/rmr.h>
+// #include <stdlib.h>
+import "C"
+import (
+	"fmt"
+	"github.com/pkg/errors"
+	"time"
+	"unsafe"
+)
+
+func (*Context) Init(port string, maxMsgSize int, maxRetries int, flags int) *Messenger {
+	pp := C.CString(port)
+	defer C.free(unsafe.Pointer(pp))
+	ctx := NewContext(maxMsgSize, maxRetries, flags, C.rmr_init(pp, C.int(maxMsgSize), C.int(flags)))
+	start := time.Now()
+	for !ctx.IsReady() {
+		time.Sleep(time.Second)
+		if time.Since(start) >= time.Minute {
+			start = time.Now()
+		}
+	}
+	// Configure the rmr to make rounds of attempts to send a message before notifying the application that it should retry.
+	// Each round is about 1000 attempts with a short sleep between each round.
+	C.rmr_set_stimeout(ctx.RmrCtx, C.int(0))
+	r := Messenger(ctx)
+	return &r
+}
+
+func (ctx *Context) SendMsg(msg *MBuf) (*MBuf, error) {
+
+	allocatedCMBuf, err := ctx.getAllocatedCRmrMBuf(msg, ctx.MaxMsgSize)
+	if err != nil {
+		return nil, err
+	}
+	if state := allocatedCMBuf.state; state != RMR_OK {
+		errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to get allocated message. state: %v - %s", state, states[int(state)])
+		return nil, errors.New(errorMessage)
+	}
+	defer C.rmr_free_msg(allocatedCMBuf)
+
+	for i := 0; i < ctx.MaxRetries; i++ {
+		currCMBuf := C.rmr_send_msg(ctx.RmrCtx, allocatedCMBuf)
+		if state := currCMBuf.state; state != RMR_OK {
+			if state != RMR_ERR_RETRY {
+				errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to send message. state: %v - %s", state, states[int(state)])
+				return nil, errors.New(errorMessage)
+			}
+			time.Sleep(100 * time.Millisecond)
+			continue
+		}
+		return convertToMBuf(currCMBuf)
+	}
+
+	return nil, errors.New(fmt.Sprintf("#rmrCgoApi.SendMsg - Too many retries"))
+}
+
+func (ctx *Context) RecvMsg() (*MBuf, error) {
+	allocatedCMBuf, err := C.rmr_alloc_msg(ctx.RmrCtx, C.int(ctx.MaxMsgSize))
+	if err != nil {
+		return nil, err
+	}
+	if state := allocatedCMBuf.state; state != RMR_OK {
+		errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to get allocated message. state: %v - %s", state, states[int(state)])
+		return nil, errors.New(errorMessage)
+	}
+	defer C.rmr_free_msg(allocatedCMBuf)
+
+	currCMBuf := C.rmr_rcv_msg(ctx.RmrCtx, allocatedCMBuf)
+	if state := currCMBuf.state; state != RMR_OK {
+		errorMessage := fmt.Sprintf("#rmrCgoApi.RecvMsg - Failed to receive message. state: %v - %s", state, states[int(state)])
+		return nil, errors.New(errorMessage)
+	}
+
+	return convertToMBuf(currCMBuf)
+}
+
+func (ctx *Context) IsReady() bool {
+	return int(C.rmr_ready(ctx.RmrCtx)) != 0
+}
+
+func (ctx *Context) Close() {
+	C.rmr_close(ctx.RmrCtx)
+}