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