tencent cloud

go get github.com/apache/rocketmq-client-go/v2

// Topic name
   var topicName = "topic1"
   // Configure message content
   msg := &primitive.Message{
       Topic: topicName, // Set the topic name
       Body:  []byte("Hello RocketMQ Go Client! This is a new message."),
   }
   // Set tags
   msg.WithTag("TAG")
   // Set keys
   msg.WithKeys([]string{"yourKey"})
   // Send the message
   res, err := p.SendSync(context.Background(), msg)
   
   if err != nil {
       fmt.Printf("send message error: %s\\n", err)
   } else {
       fmt.Printf("send message success: result=%s\\n", res.String())
   }

// Disable the producer
   err = p.Shutdown()
   if err != nil {
       fmt.Printf("shutdown producer error: %s", err.Error())
   }

// Service access address (Note: Add “http://” or “https://” before the access address; otherwise, it cannot be resolved)
   var serverAddress = "https://rocketmq-xxx.rocketmq.ap-bj.public.tencenttdmq.com:9876"
   // Authorize the role name
   var secretKey = "admin"
   // Authorize the role token
   var accessKey = "eyJrZXlJZC...."
   // Full namespace name
   var nameSpace = "rocketmq-xxx|namespace_go"
   // Producer group name
   var groupName = "group11"
   // Create a consumer
   c, err := rocketmq.NewPushConsumer(
       // Set the consumer group
       consumer.WithGroupName(groupName),
       // Set the service address
       consumer.WithNsResolver(primitive.NewPassthroughResolver([]string{serverAddress})),
       // Set ACL permissions
       consumer.WithCredentials(primitive.Credentials{
           SecretKey: secretKey,
           AccessKey: accessKey,
       }),
       // Set the namespace name
       consumer.WithNamespace(nameSpace),
       // Set consumption from the start offset
       consumer.WithConsumeFromWhere(consumer.ConsumeFromFirstOffset),
       // Set the consumption mode (cluster consumption by default)
       consumer.WithConsumerModel(consumer.Clustering),
       
       //For broadcasting consumption, set the instance name to the system name of the application. If the instance name is not set, the pid will be used, which will cause a restart for repeated consumption
       consumer.WithInstance("xxxx"),
   )
   if err != nil {
       fmt.Println("init consumer2 error: " + err.Error())
       os.Exit(0)
   }

// Topic name
   var topicName = "topic1"
   // Set the tag of messages that are subscribed to
   selector := consumer.MessageSelector{
       Type:       consumer.TAG,
       Expression: "TagA || TagC",
   }
   // Set the delay level of consumption retry. A total of 18 levels can be set. Below is the relationship between each delay level and the delay time.
   // 1   2   3    4    5   6   7   8   9   10  11  12  13  14   15   16   17  18
   // 1s, 5s, 10s, 30s, 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, 20m, 30m, 1h, 2h
   delayLevel := 1
   err = c.Subscribe(topicName, selector, func(ctx context.Context,
                                                                 msgs ...*primitive.MessageExt) (consumer.ConsumeResult, error) {
       fmt.Printf("subscribe callback len: %d \\n", len(msgs))
       // Set the delay level for the next consumption
       concurrentCtx, _ := primitive.GetConcurrentlyCtx(ctx)
       concurrentCtx.DelayLevelWhenNextConsume = delayLevel // only run when return consumer.ConsumeRetryLater
   
       for _, msg := range msgs {
           // Simulate a successful consumption after three retries
           if msg.ReconsumeTimes > 3 {
               fmt.Printf("msg ReconsumeTimes > 3. msg: %v", msg)
               return consumer.ConsumeSuccess, nil
           } else {
               fmt.Printf("subscribe callback: %v \\n", msg)
           }
       }
       // Simulate a consumption failure. Retry is required.
       return consumer.ConsumeRetryLater, nil
   })
   if err != nil {
       fmt.Println(err.Error())
   }

// Start consumption
   err = c.Start()
   if err != nil {
       fmt.Println(err.Error())
       os.Exit(-1)
   }
   time.Sleep(time.Hour)
   // Release resources
   err = c.Shutdown()
   if err != nil {
       fmt.Printf("shundown Consumer error: %s", err.Error())
   }