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

来源:互联网 发布:fileinput.js 参数 编辑:程序博客网 时间:2024/05/29 07:01

转载请标明出处:
http://blog.csdn.net/forezp/article/details/71023652
本文出自方志朋的博客

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

  • 安装redis,可参考我的另一篇文章,5分钟带你入门Redis。
  • java 1.8
  • maven 3.0
  • idea

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:

            org.springframework.boot            spring-boot-starter-data-redis

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

源码下载:

https://github.com/forezp/SpringBootLearning

参考资料

messaging-redis

0 0