SpringBoot集成RocketMQ

1、添加pom.xml依赖

<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-spring-boot-starter</artifactId>
    <version>2.2.3</version>
</dependency>

2、发送消息

@Slf4j
@RestController
public class TestController {
	@Autowired
	private RocketMQTemplate rocketMQTemplate;

	/**
	 * 同步消息发送
	 * 
	 * @param tag
	 * @param delayTime  延迟时间
	 * @param delayLevel 共18个级别：1s,5s,10s,30s,1m,2m,3m,4m,5m,6m,7m,8m,9m,10m,20m,30m,1h,2h
	 * @return
	 */
	@GetMapping("send")
	public SendResult send(@RequestParam(defaultValue = "all") String tag,
			@RequestParam(required = false) Long delayTime, @RequestParam(required = false) Integer delayLevel) {
		String destination = RocketMQConstant.TOPIC + ":" + tag;

		UserChange change = UserChange.builder().userName("张三").remark("密码变更").build();
		Message<UserChange> message = MessageBuilder.withPayload(change).setHeader(RocketMQHeaders.KEYS, "key").build();
		log.info("准备发送消息");
		if (delayTime != null) { // 按时间延迟消息
			// RocketMQ_4.9.x版本不支持延迟时间，指定时间无效
			return rocketMQTemplate.syncSendDelayTimeMills(destination, message, 5000L);
		} else if (delayLevel != null) { // 按级别延迟消息
			return rocketMQTemplate.syncSend(destination, message, 5000L, delayLevel);
		} else {
			return rocketMQTemplate.syncSend(destination, message);
		}
	}
}

3、创建消息消费者

@Component
@Slf4j
public class MessageConsumerService {

	@Component
	@RocketMQMessageListener(topic = RocketMQConstant.TOPIC, consumerGroup = "consumer-group1", selectorExpression = "all||tag1")
	public class Consumer1 implements RocketMQListener<MessageExt> {
		@Override
		public void onMessage(MessageExt message) {
			log.info("收到信息：{}，Keys={}，Topic={}", new String(message.getBody()), message.getKeys(), message.getTopic());
		}
	}

	@Component
	@RocketMQMessageListener(topic = RocketMQConstant.TOPIC, consumerGroup = "consumer-group2", selectorExpression = "all||tag2")
	public class Consumer2 implements RocketMQListener<String> {
		@Override
		public void onMessage(String message) {
			log.info("收到信息：{}", message);
		}
	}

	@Component
	@RocketMQMessageListener(topic = RocketMQConstant.TOPIC, consumerGroup = "consumer-group3", selectorExpression = "all||tag3")
	public class Consumer3 implements RocketMQListener<UserChange> {
		@Override
		public void onMessage(UserChange message) {
			log.info("收到信息：{}", JSON.toJSONString(message));
		}
	}
}

Consumer1能收到tag为all或tag1的消息；Consumer2能收到tag为all或tag2的消息；Consumer3能收到tag为all或tag3的消息；

4、日志输出

2023-05-09 18:52:12.482 [ConsumeMessageThread_consumer-group1_1] INFO com.zhi.demo.consumer.MessageConsumerService$Consumer1.onMessage 30 -- 收到信息：{"userName":"张三","remark":"密码变更"}，Keys=key，Topic=my-topic
2023-05-09 18:52:13.107 [ConsumeMessageThread_consumer-group2_1] INFO com.zhi.demo.consumer.MessageConsumerService$Consumer2.onMessage 39 -- 收到信息：{"userName":"张三","remark":"密码变更"}
2023-05-09 18:52:13.789 [ConsumeMessageThread_consumer-group3_1] INFO com.zhi.demo.consumer.MessageConsumerService$Consumer3.onMessage 48 -- 收到信息：{"remark":"密码变更","userName":"张三"}

5、调整日志输出：

RocketMQ消费者注册信息默认输出到~/logs\rocketmqlogs/rocketmq_client.log（Windows在用户目录下）

1）启动类添加参数

System.setProperty(ClientLogger.CLIENT_LOG_USESLF4J, "true");

详细过程可查看InternalLoggerFactory.getLoggerFactory

2）修改日志级别（不加的话日志会刷屏）

logging.level.RocketmqRemoting=warn
logging.level.RocketmqClient=warn
logging.level.RocketmqCommon=warn
logging.level.RocketmqStore=warn

这里我有话要说下，开始的时候不知道RocketMQ的消费者日志在另外一个文件，搞的我配置信息出错了都不知道，最后研究了半天源码才知道问题所在，浪费我2天时间。天坑！

 

常见错误：

1、No topic route info in name server for the topic: my-topic

my-topic不存在，要么在控制台手工创建，要么broker配置文件添加参数autoCreateTopicEnable=true

2、connect to 172.17.183.41:10911 failed

防火墙需要开启10911端口

firewall-cmd --zone=public --add-port=10911/tcp --permanent
firewall-cmd --reload

3、sendDefaultImpl call timeout

消息发送超时，可调整rocketmq.producer.send-message-timeout参数，默认3秒