SpringBoot 整合 RocketMQ 简单入门
SpringBoot 整合 RocketMQ 简单入门
SpringBoot 提供了快捷操作 RocketMQ 的 RocketMQTemplate 对象。
1、引入依赖
注意依赖的版本需要和 RocketMQ 的版本相同。
<dependency>
<groupId>org.apache.rocketmqgroupId>
<artifactId>rocketmq-spring-boot-starterartifactId>
<version>2.1.1version>
dependency>
2、编写配置文件
# 应用名称
spring.application.name=rocketmq-demo
# 应⽤服务 WEB 访问端⼝
server.port=8080
# nameserver地址
rocketmq.name-server=192.168.194.134:9876
# 配置⽣产者组
rocketmq.producer.group=producer-demo-group1
3、编写生产者发送普通消息
@Component
public class MyProducer {
@Autowired
private RocketMQTemplate rocketMQTemplate;
/**
* 发送消息
*
* @param topic 主题
* @param message 消息
*/
public void sendMessage(String topic, String message) {
rocketMQTemplate.convertAndSend(topic, message);
}
}
4、编写单元测试发送消息
@SpringBootTest
class MyProducerTest {
@Autowired
private MyProducer myProducer;
@Test
void testSendMessage() {
String topic = "my-boot-topic";
String message = "hello rocketmq springboot message!";
myProducer.sendMessage(topic, message);
System.out.println("消息发送成功！");
}
}
报错：sendDefaultImpl 呼叫超时
Caused by: org.apache.rocketmq.remoting.exception.RemotingTooMuchRequestException: sendDefaultImpl call timeout
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:717)
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1426)
at org.apache.rocketmq.client.producer.DefaultMQProducer.send(DefaultMQProducer.java:370)
at org.apache.rocketmq.spring.core.RocketMQTemplate.syncSend(RocketMQTemplate.java:688)
原因：启动 namesrv，broke 没有指定 ip 或者是没开启。
配置错了，配置文件中写的是服务器 1 的地址，没有开启 broker，将配置改成指定服务器 2 的 ip地址 即可。
运行成功后，可视化控制台：
5、创建消费者程序
新建一个模块，在里面编写消费者代码
-
引入依赖
-
编写配置文件
# 应用名称 spring.application.name=my-boot-consumer-demo # 应⽤服务 WEB 访问端⼝ server.port=8081 # nameserver地址 rocketmq.name-server=192.168.194.134:9876 -
编写消费者类
@Component @RocketMQMessageListener(consumerGroup = "my-boot-consumer-group1",topic = "my-boot-topic") public class MyConsumer implements RocketMQListener<String> { @Override public void onMessage(String message) { System.out.println("收到的消息：" + message); } }
运行结果：
6、发送事务消息
-
在生产者类里编写方法
/** * 发送消息事务 * * @param topic 主题 * @param msg 消息 * @throws InterruptedException 中断异常 */ public void sendMessageInTransaction(String topic, String msg) throws InterruptedException { String[] tags = new String[]{"TagA","TagB","TagC","TagD","TagE"}; for (int i = 0; i < 10; i++) { // 创建一个消息对象，并通过调用withPayload()方法，向消息对象中添加了一个负载，即要发送的字符串类型的数据 Message<String> message = MessageBuilder.withPayload(msg).build(); // topic 和 tag 整合成一个字符串 String destination = topic+":"+tags[ i % tags.length]; // 第一个destination是消息要发送的目的地topic，第二个destination是消息携带的业务数据 TransactionSendResult sendResult = rocketMQTemplate.sendMessageInTransaction(destination, message, destination); System.out.println(sendResult); // 暂停10毫秒，以模拟消息的发送和处理过程所需要的时间 Thread.sleep(10); } } -
重写事务监听器
@RocketMQTransactionListener(rocketMQTemplateBeanName = "rocketMQTemplate") public class MyTransactionListener implements RocketMQLocalTransactionListener { @Override public RocketMQLocalTransactionState executeLocalTransaction(Message message, Object arg) { String destination = (String) arg; // 把spring的message转换成RocketMQ的message org.apache.rocketmq.common.message.Message message1 = RocketMQUtil.convertToRocketMessage( new StringMessageConverter(), "utf-8", destination, message ); // 获取message1上的tag对内容 String tags = message1.getTags(); if (StringUtils.contains(tags, "TagA")) { return RocketMQLocalTransactionState.COMMIT; // 返回提交事务状态，表示允许消费者消费该消息 }else if(StringUtils.contains(tags, "TagB")) { return RocketMQLocalTransactionState.ROLLBACK; // 返回回滚事务状态，表示该消息将被删除，不允许消费 }else { return RocketMQLocalTransactionState.UNKNOWN; // 返回中间状态，表示需要回查才能确定状态 } } @Override public RocketMQLocalTransactionState checkLocalTransaction(Message message) { return null; } }
7、编写单元测试发送事务消息
@Test
void testSendMessageInTransaction() throws InterruptedException {
String topic = "my-boot-topic";
String message = "hello rocketmq transaction springboot message";
myProducer.sendMessageInTransaction(topic, message);
System.out.println("事务消息发送成功");
}
运行结果：
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC2428317E70000, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=2], queueOffset=34]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC24283F95B0003, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=3], queueOffset=35]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC242856FB20006, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-a, queueId=0], queueOffset=66]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC2428573320009, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-a, queueId=1], queueOffset=67]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC242857FAC000C, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-a, queueId=2], queueOffset=68]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC242857FC5000F, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-a, queueId=3], queueOffset=69]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC242857FDB0012, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=0], queueOffset=36]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC2428580A10015, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=1], queueOffset=37]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC24285810B0018, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=2], queueOffset=38]
SendResult [sendStatus=SEND_OK, msgId=240884599C20078554A5D7CC84F1B9A74C4018B4AAC242858133001B, offsetMsgId=null, messageQueue=MessageQueue [topic=my-transaction-topic, brokerName=broker-b, queueId=3], queueOffset=39]
事务消息发送成功