企业级 SpringBoot 教程-在springboot中用redis实现消息队列

准备阶段

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>

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); }