SpringBoot非官方教程 | 第十四篇:在springboot中用redis实现消息队列

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原文首发于:https://www.fangzhipeng.com/springboot/2017/07/11/springboot14-redis-mq/
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这篇文章主要讲述如何在springboot中用reids实现消息队列。

准备阶段

环境依赖

创建一个新的springboot工程,在其pom文件,加入spring-boot-starter-data-redis依赖:

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>

创建一个消息接收者

REcevier类,它是一个普通的类,需要注入到springboot中。

public class Receiver {
    private static final Logger LOGGER = LoggerFactory.getLogger(Receiver.class);

    private CountDownLatch latch;

    @Autowired
    public Receiver(CountDownLatch latch) {
        this.latch = latch;
    }

    public void receiveMessage(String message) {
        LOGGER.info("Received <" + message + ">");
        latch.countDown();
    }
}

注入消息接收者

@Bean
	Receiver receiver(CountDownLatch latch) {
		return new Receiver(latch);
	}

	@Bean
	CountDownLatch latch() {
		return new CountDownLatch(1);
	}

	@Bean
	StringRedisTemplate template(RedisConnectionFactory connectionFactory) {
		return new StringRedisTemplate(connectionFactory);
	}

注入消息监听容器

在spring data redis中,利用redis发送一条消息和接受一条消息,需要三样东西:

  • 一个连接工厂
  • 一个消息监听容器
  • Redis template

上述1、3步已经完成,所以只需注入消息监听容器即可:

@Bean
	RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
											MessageListenerAdapter listenerAdapter) {

		RedisMessageListenerContainer container = new RedisMessageListenerContainer();
		container.setConnectionFactory(connectionFactory);
		container.addMessageListener(listenerAdapter, new PatternTopic("chat"));

		return container;
	}

	@Bean
	MessageListenerAdapter listenerAdapter(Receiver receiver) {
		return new MessageListenerAdapter(receiver, "receiveMessage");
	}


测试

在springboot入口的main方法:

public static void main(String[] args) throws Exception{
		ApplicationContext ctx =  SpringApplication.run(SpringbootRedisApplication.class, args);

		StringRedisTemplate template = ctx.getBean(StringRedisTemplate.class);
		CountDownLatch latch = ctx.getBean(CountDownLatch.class);

		LOGGER.info("Sending message...");
		template.convertAndSend("chat", "Hello from Redis!");

		latch.await();

		System.exit(0);
	}

先用redisTemplate发送一条消息,接收者接收到后,打印出来。启动springboot程序,控制台打印:

2017-04-20 17:25:15.536 INFO 39148 — [ main] com.forezp.SpringbootRedisApplication : Sending message…
2017-04-20 17:25:15.544 INFO 39148 — [ container-2] com.forezp.message.Receiver : 》Received <Hello from Redis!>

测试通过,接收者确实接收到了发送者的消息。

源码下载:

https://github.com/forezp/SpringBootLearning

参考资料

messaging-redis


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posted @ 2017-04-30 16:29  方志朋的专栏  阅读(242)  评论(0编辑  收藏  举报