一、相关依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>
二、redis 监听器配置
import org.springframework.cache.annotation.EnableCaching; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Scope; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.listener.PatternTopic; import org.springframework.data.redis.listener.RedisMessageListenerContainer; import org.springframework.data.redis.listener.adapter.MessageListenerAdapter; @Configuration @EnableCaching public class RedisConfig{ /** * Redis消息监听器容器 * @param connectionFactory * @return */ @Bean RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory) { RedisMessageListenerContainer container = new RedisMessageListenerContainer(); container.setConnectionFactory(connectionFactory); //订阅了一个叫pmp和channel 的通道,多通道 container.addMessageListener(listenerAdapter( new RedisPmpSub()), new PatternTopic( "pmp" )); container.addMessageListener(listenerAdapter( new RedisChannelSub()), new PatternTopic( "channel" )); //这个container 可以添加多个 messageListener return container; } /** * 配置消息接收处理类 * @param redisMsg 自定义消息接收类 * @return */ @Bean() @Scope( "prototype" ) MessageListenerAdapter listenerAdapter(RedisMsg redisMsg) { //这个地方 是给messageListenerAdapter 传入一个消息接受的处理器,利用反射的方法调用“receiveMessage” //也有好几个重载方法,这边默认调用处理器的方法 叫handleMessage 可以自己到源码里面看 return new MessageListenerAdapter(redisMsg, "receiveMessage" ); //注意2个通道调用的方法都要为receiveMessage } }
三、消息处理器
import org.springframework.stereotype.Component; @Component public interface RedisMsg { public void receiveMessage(String message); } public class RedisPmpSub implements RedisMsg{ /** * 接收消息的方法 * @param message 订阅消息 */ public void receiveMessage(String message){ //注意通道调用的方法名要和RedisConfig2的listenerAdapter的MessageListenerAdapter参数2相同 System.out.println(message); } }
四、消息发布者
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; //定时器 @EnableScheduling @Component public class TestSenderController { @Autowired private StringRedisTemplate stringRedisTemplate; //向redis消息队列index通道发布消息 @Scheduled(fixedRate = 2000) public void sendMessage(){ stringRedisTemplate.convertAndSend("pmp",String.valueOf(Math.random())); stringRedisTemplate.convertAndSend("channel",String.valueOf(Math.random())); } }
备注: 使用策略模式优化消息处理器,模板化建立通道
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