107 lines
3.3 KiB
Go
107 lines
3.3 KiB
Go
//
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// Copyright 2019 AT&T Intellectual Property
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// Copyright 2019 Nokia
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// This source code is part of the near-RT RIC (RAN Intelligent Controller)
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// platform project (RICP).
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package rmr
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// #cgo LDFLAGS: -L/usr/local/lib -lrmr_nng -lnng
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// #include <rmr/rmr.h>
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// #include <stdlib.h>
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import "C"
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import (
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"fmt"
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"github.com/pkg/errors"
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"time"
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"unsafe"
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)
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func (*Context) Init(port string, maxMsgSize int, maxRetries int, flags int) *Messenger {
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pp := C.CString(port)
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defer C.free(unsafe.Pointer(pp))
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ctx := NewContext(maxMsgSize, maxRetries, flags, C.rmr_init(pp, C.int(maxMsgSize), C.int(flags)))
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start := time.Now()
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for !ctx.IsReady() {
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time.Sleep(time.Second)
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if time.Since(start) >= time.Minute {
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start = time.Now()
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}
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}
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// Configure the rmr to make rounds of attempts to send a message before notifying the application that it should retry.
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// Each round is about 1000 attempts with a short sleep between each round.
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C.rmr_set_stimeout(ctx.RmrCtx, C.int(0))
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r := Messenger(ctx)
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return &r
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}
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func (ctx *Context) SendMsg(msg *MBuf) (*MBuf, error) {
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allocatedCMBuf, err := ctx.getAllocatedCRmrMBuf(msg, ctx.MaxMsgSize)
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if err != nil {
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return nil, err
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}
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if state := allocatedCMBuf.state; state != RMR_OK {
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errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to get allocated message. state: %v - %s", state, states[int(state)])
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return nil, errors.New(errorMessage)
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}
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defer C.rmr_free_msg(allocatedCMBuf)
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for i := 0; i < ctx.MaxRetries; i++ {
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currCMBuf := C.rmr_send_msg(ctx.RmrCtx, allocatedCMBuf)
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if state := currCMBuf.state; state != RMR_OK {
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if state != RMR_ERR_RETRY {
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errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to send message. state: %v - %s", state, states[int(state)])
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return nil, errors.New(errorMessage)
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}
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time.Sleep(100 * time.Millisecond)
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continue
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}
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return convertToMBuf(currCMBuf)
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}
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return nil, errors.New(fmt.Sprintf("#rmrCgoApi.SendMsg - Too many retries"))
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}
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func (ctx *Context) RecvMsg() (*MBuf, error) {
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allocatedCMBuf, err := C.rmr_alloc_msg(ctx.RmrCtx, C.int(ctx.MaxMsgSize))
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if err != nil {
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return nil, err
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}
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if state := allocatedCMBuf.state; state != RMR_OK {
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errorMessage := fmt.Sprintf("#rmrCgoApi.SendMsg - Failed to get allocated message. state: %v - %s", state, states[int(state)])
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return nil, errors.New(errorMessage)
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}
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defer C.rmr_free_msg(allocatedCMBuf)
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currCMBuf := C.rmr_rcv_msg(ctx.RmrCtx, allocatedCMBuf)
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if state := currCMBuf.state; state != RMR_OK {
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errorMessage := fmt.Sprintf("#rmrCgoApi.RecvMsg - Failed to receive message. state: %v - %s", state, states[int(state)])
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return nil, errors.New(errorMessage)
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}
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return convertToMBuf(currCMBuf)
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}
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func (ctx *Context) IsReady() bool {
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return int(C.rmr_ready(ctx.RmrCtx)) != 0
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}
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func (ctx *Context) Close() {
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C.rmr_close(ctx.RmrCtx)
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}
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