目录
导入依赖
<dependency>
<groupId>org.apache.rocketmq</groupId>
<artifactId>rocketmq-spring-boot-starter</artifactId>
</dependency>
YAML配置
rocketmq:
name-server: localhost:9876 # rocketMq的nameServer地址
同步消息是发送消息后等待Broker的响应,确保消息被成功接收。
生产者:
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
SendResult result = rocketMQTemplate.syncSend("test", MessageBuilder.withPayload("同步消息").build());
// SendResult result = rocketMQTemplate.syncSend("test", "同步消息");
System.out.println("发送状态:" + result.getSendStatus() + " 消息id:" + result.getMsgId());
}
异步消息是发送消息后不等待Broker响应,通过回调函数处理发送结果。
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
rocketMQTemplate.asyncSend("test", MessageBuilder.withPayload("异步消息").build(), new SendCallback() {
@Override
public void onSuccess(SendResult sendResult) {
System.out.println("发送成功"+sendResult);
}
@Override
public void onException(Throwable throwable) {
System.out.println("发送失败"+throwable);
}
});
}
单向消息是发送消息后不等待Broker响应,也没有回调函数。
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
rocketMQTemplate.sendOneWay("test","单向消息");
}
延迟消息是设置消息的延迟时间,确保消息在指定时间后才被消费。
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
//在RocketMQ中,timeout(超时时间)是指消息发送的最大等待时间。当你发送一个消息时,系统会等待一定的时间来获取发送结果,这个等待的时间就是超时时间。单位ms
Message<String> message = MessageBuilder.withPayload("延迟消息").build();
//延迟级别 "1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2h" 2对应5s
SendResult result = rocketMQTemplate.syncSend("test", message, 2000, 2);
}
批量消息是将多个消息打包成一个消息批次发送,提高发送效率。
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
List<String> list = Arrays.asList("blue", "red", "pink", "yello");
rocketMQTemplate.syncSend("test",list);
}
上面所有生产者对应的消费者代码为:
@Component
@RocketMQMessageListener(topic = "test",consumerGroup = "test-group-consumer")
public class MQMsgListener implements RocketMQListener<MessageExt> {
@Override
public void onMessage(MessageExt message) {
String msgId = message.getMsgId();
String msg = new String(message.getBody());
System.out.println("消息id:"+msgId+"消息内容:"+msg);
}
}
顺序消息是保证同一个消息队列中的消息按顺序消费。
生产者代码:
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
for(int i=0;i<10;i++)
{
rocketMQTemplate.syncSendOrderly("test","顺序消息"+i,"1");
}
}
消费者代码更改:
@Component
@RocketMQMessageListener(topic = "test",consumerGroup = "test-group-consumer",consumeMode = ConsumeMode.ORDERLY)
public class MQMsgListener implements RocketMQListener<MessageExt> {
@Override
public void onMessage(MessageExt message) {
String msgId = message.getMsgId();
String msg = new String(message.getBody());
System.out.println("消息id:"+msgId+"消息内容:"+msg);
}
}
消费者订阅的Tag和发送者设置的消息Tag相互匹配,则消息被投递给消费端进行消费。
生产者
@Autowired
RocketMQTemplate rocketMQTemplate;
@Test
void contextLoads() {
rocketMQTemplate.syncSend("test:test","hello");
}
消费者
@Component
@RocketMQMessageListener(topic = "test",consumerGroup = "test-group-consumer",selectorType = SelectorType.TAG,selectorExpression = "test")
public class MQMsgListener implements RocketMQListener<MessageExt> {
@Override
public void onMessage(MessageExt message) {
String msgId = message.getMsgId();
String msg = new String(message.getBody());
System.out.println("消息id:"+msgId+"消息内容:"+msg);
}
}
?@RocketMQMessageListener
?注解参数如下: