使用阿里云rocketmq实现简单发送和消费

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package main

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

/*
   Copied from https://github.com/apache/rocketmq-clients/blob/rocketmq-client-golang-5.0.0/golang/example/consumer/simple_consumer/main.go by lqx at 2023-11-27T15:34:51+08:00.
*/

import (
	"context"
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"regexp"
	"time"

	"github.com/apache/rocketmq-clients/golang"
	"github.com/apache/rocketmq-clients/golang/credentials"
)

var (
	// maximum waiting time for receive func
	awaitDuration = time.Second * 5
	// maximum number of messages received at one time
	maxMessageNum int32 = 16
	// invisibleDuration should > 20s
	invisibleDuration = time.Second * 20
	// receive messages in a loop
)

func main() {
	topic := flag.String("topic", "", "rocketmq 5.x topic")
	groupName := flag.String("group_name", "", "rocketmq 5.x group")
	endpoint := flag.String("endpoint", "", "rocketmq 5.x endpoint")
	accessKey := flag.String("access_key", "", "rocketmq 5.x access key")
	secretKey := flag.String("secret_key", "", "rocketmq 5.x secret key")

	flag.Parse()
	// log to console
	// os.Setenv("mq.consoleAppender.enabled", "true")
	os.Setenv("rocketmq.client.logRoot", "./logs")
	os.Setenv("rocketmq.client.logLevel", "warning")
	golang.ResetLogger()
	// new simpleConsumer instance
	simpleConsumer, err := golang.NewSimpleConsumer(&golang.Config{
		Endpoint:      *endpoint,
		ConsumerGroup: *groupName,
		Credentials: &credentials.SessionCredentials{
			AccessKey:    *accessKey,
			AccessSecret: *secretKey,
		},
	},
		golang.WithAwaitDuration(awaitDuration),
		golang.WithSubscriptionExpressions(map[string]*golang.FilterExpression{
			*topic: golang.SUB_ALL,
		}),
	)
	if err != nil {
		log.Fatal(err)
	}
	// start simpleConsumer
	err = simpleConsumer.Start()
	if err != nil {
		log.Fatal(err)
	}

	// gracefule stop simpleConsumer
	defer simpleConsumer.GracefulStop()

	go func() {
		for {
			fmt.Println("start recevie message")
			mvs, err := simpleConsumer.Receive(context.TODO(), maxMessageNum, invisibleDuration)
			if err != nil {
				fmt.Println(err)
			}
			// ack message
			for _, mv := range mvs {
				tag := mv.GetTag()
				keys := mv.GetKeys()
				// ensure it's json like
				body := mv.GetBody()
				var data map[string]string
				err := json.Unmarshal(body, &data)
				if err != nil {
					fmt.Println(err)
					break
				}
				fmt.Println("got message tag ", *tag)
				fmt.Println("got message keys ", keys)
				fmt.Println("got message data ", data)
				// only close_open like tag will ack
				if matched, _ := regexp.Match("close_open", []byte(*tag)); matched == true {
					callback, ok := data["url"]
					if ok {
						fmt.Println("will request with url", data["url"])
						ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
						defer cancel()

						jenkins_username := os.Getenv("JENKINS_USERNAME")
						jenkins_password := os.Getenv("JENKINS_PASSWORD")
						// will send jenkins stop env requests
						req, err := http.NewRequestWithContext(ctx, http.MethodPost, callback, nil)
						req.SetBasicAuth(jenkins_username, jenkins_password)
						// make the POST request
						client := &http.Client{}
						res, err := client.Do(req)
						if err != nil {
							fmt.Println("Send jenkins request failed:", err)
							simpleConsumer.Ack(context.TODO(), mv)
							break
						} else {
							// Check the response status code
							if res.StatusCode == http.StatusOK || res.StatusCode == http.StatusCreated {
								fmt.Println("Send jenkins request successfully")
							} else {
								fmt.Println("Send jenkins request failed status:", res.Status)
							}
						}
						defer res.Body.Close()

					} else {
						fmt.Println("does not have url, ignore")
					}
				} else {
					fmt.Println("ignore this message, but ack")
				}
				simpleConsumer.Ack(context.TODO(), mv)

			}
			time.Sleep(time.Second * 10)
		}
	}()
	// Keep the application running
	done := make(chan struct{})
	<-done
}