需要Maven依赖：
org.apache.rocketmq:rocketmq-client:4.5.1
org.apache.rocketmq:rocketmq-acl:4.5.1
org.springframework.retry:spring-retry:1.2.4.RELEASE

• 提供@RocketListener注解，将RocketMQ与Spring集成，帮助开发人员提高开发效率。
• 可以快速从基于@RabbitListener注解的Spring项目迁移。

提供@RocketListener(consumerGroup,topic,tag)，在Spring启动过程中，自动注册DefaultMQPushConsumer。

1.1 注册MessageListenerConcurrently消息监听器

@Service
public class MessageConsumer{
   
    // orderly = false 并发消费
   @RocketListener(orderly = false, consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
   public ConsumeConcurrentlyStatus service(Message msg, MessageExt msgx, ConsumeConcurrentlyContext context) {
      return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
   }
   
}

1.2 注册MessageListenerOrderly消息监听器

@Service
public class MessageConsumer{
    
   // orderly = true 顺序消费
   @RocketListener(orderly = true, consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
   public ConsumeOrderlyStatus service(Message msg, MessageExt msgx, ConsumeOrderlyContext context) {
      return ConsumeOrderlyStatus.SUCCESS;
   }
   
}

2.1 并发消费
@RocketListener(delayTimeLevel)支持延迟重试时间级别的定义。真实延迟时间由RocketMQ配置文件中messageDelayLevel决定。

@RocketListener(delayTimeLevel = 1, /* ...省略... */)

2.2 顺序消费
@RocketListener(suspendTimeMillis)支持暂停时间的定义，时间单位为毫秒(millis)

@RocketListener(suspendTimeMillis = 1000, /* ...省略... */)

3.1 根据Exception类型忽略异常
@RocketListener(ignoredExceptions)支持定义可以忽略的异常，这些异常将不进行重试。

@RocketListener(ignoredExceptions = {NullpointerException.class, ArrayIndexOutOfBoundsException.class})

3.2 实现ExceptionIgnore接口忽略异常
@RocketListener(exceptionIgnores)支持定义可以忽略的异常，实现ExceptionIgnore接口，当ignorable(e)返回true时忽略异常。

@RocketListener(exceptionIgnores = {MyIgnore1.class, MyIgnore2.class})

• RocketConfiguration - 全局级别
• @RocketConsumer - 类级别
• @RocketListener - 方法级别

优先级：方法级 > 类级 > 全局级，高优先级配置覆盖低优先级配置。

与@Value注解中，占位符使用一致，可以加载任意Properties键值

@RocketListener(topic = "${rocketmq.topic}")

6.1 ConsumeConcurrentlyStatus类型

@RocketListener(consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
  public ConsumeConcurrentlyStatus service(Message msg, MessageExt msgx, ConsumeConcurrentlyContext context) {
     return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
}

6.2 Boolean类型

• true为消费成功
• false为消费失败

@RocketListener(consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
public boolean service(Message msg, ConsumeConcurrentlyContext context) {
     return true;
}

6.3 Void类型

• 默认消费成功
• 抛出异常消费失败

@RocketListener(consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
public void service(Message msg, MessageExt msgx) {
    
}

在类上使用@RocketACL注解，配置类级别的ACL授权信息

@RocketACL(accessKey = "accessKey", secretKey = "accessKey")
public class MessageConsumer{
   
   @RocketListener(consumerGroup = "myGroup", topic = "myTopic",tag = "myTag")
   public boolean service(Message message) {
      return true;
   }
   
}

1. 使用@EnableRocketMQ开启功能

   @EnableRocketMQ
   @Configuration
   public class RocketMQConfiguration {
       // ...省略... 
   }

2. 配置NameServer

   • RocketConfiguration中使用setNameServer()方法
   • @RocketConsumer在类上nameServer定义
   • @RocketListener在方法上nameServer定义

3. @RocketListener在方法上声明消费监听器

   @Service
   public class MessageConsumerListener {
   
      @RocketListener(
         orderly = false, // 是否顺序消费
         nameServer = "127.0.0.1:9876", // nameServer地址
         instance = "myInstance", // instance名称
         consumerGroup = "myGroup", // consumerGroup名称
         topic = "myTopic", // topic名称
         tag = "myTag", // tag名称
         delayTimeLevel = 3, // 并发消费的重试延迟级别，orderly=false时有效
         suspendTimeMillis = 1000, // 顺序消费时的暂停时间，orderly=true时有效
         ignoredExceptions = {MyException1.class, MyException2.class}, // 可以被忽略的Exception
         exceptionIgnores = {MyIgnore1.class, MyIgnore2.class}, // 根据Exception内容忽略
         hook = MyRPCHook.class // RPCHook
      )
      public ConsumeConcurrentlyStatus service(YourMessageClass msg, MessageExt msgx, ConsumeConcurrentlyContext ctx) {
         return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
      }
   
   }

功能不断完善中......

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