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

2017-07-02 14:24 911 查看
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:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
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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();
}
}
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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);
}
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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");
}
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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);
}
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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
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标签:  springboot