SpringBoot+Redis 实现消息订阅发布

SpringBoot+Redis 实现发布订阅

springboot 如何整合 redis 我这里就不讲了，相信对你来说也没有一点问题。我们直接上代码

import com.ruoyi.remote.redisQueue.RedisReceiver;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.listener.PatternTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;

@Configuration
public class RedisSubConfig {

    public static final String SUB_KEY = "yuan";//频道channel
    /**
     * redis消息监听器容器
     * 可以添加多个监听不同话题的redis监听器，只需要把消息监听器和相应的消息订阅处理器绑定，该消息监听器
     * 通过反射技术调用消息订阅处理器的相关方法进行一些业务处理
     * @param connectionFactory
     * @param listenerAdapter
     * @return
     */
    @Bean
    public RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory, MessageListenerAdapter listenerAdapter) {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        //订阅了一个频道
        container.addMessageListener(listenerAdapter, new PatternTopic(RedisSubConfig.SUB_KEY));
        return container;
    }

    /**
     * 消息监听器适配器，绑定消息处理器，利用反射技术调用消息处理器的业务方法
     * @param receiver
     * @return
     */
    @Bean
    public MessageListenerAdapter listenerAdapter(RedisReceiver receiver) {
        return new MessageListenerAdapter(receiver, "receiveMessage");
    }



    /**
     * redis 读取内容的template
     * @param connectionFactory
     * @return
     */
    @Bean
    public StringRedisTemplate template(RedisConnectionFactory connectionFactory) {
        return new StringRedisTemplate(connectionFactory);
    }


}

消息接受者

import org.springframework.stereotype.Service;

@Service
public class RedisReceiver {

    public void receiveMessage(String json) {
        System.out.println("接收消息：" +json);
    }

}

消息发送者

import com.ruoyi.common.core.utils.JsonUtils;
import com.ruoyi.common.redis.service.RedisService;
import com.ruoyi.remote.websocket.service.impl.WebSocketService;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;

@EnableScheduling //开启定时器功能
@Component
public class MessageSender {


    @Resource
    private RedisService redisService;


    int numder = 1;

    @Scheduled(fixedRate = 5000) //间隔5s 通过StringRedisTemplate对象向redis消息队列chat频道发布消息
    public void sendMessage(){
        numder++;
        redisService.convertAndSend("yuan",numder+"");
    }
}