Spring with Redis 消息订阅和推送

1、pom

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

2、redis配置

# redis
spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.password=xxxxx

3、推送

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

@Component
public class RedisPublisher {

    private final StringRedisTemplate redisTemplate;

    public RedisPublisher(StringRedisTemplate redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    public void publish(String channel, String message) {
        redisTemplate.convertAndSend(channel, message);
    }
}

4、订阅

import xxx.RedisSubscriber;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.listener.ChannelTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;

@Configuration
@Slf4j
public class RedisConfig {

    @Value("${redis.topic}")
    private String topic;

    @Bean
    public MessageListenerAdapter messageListenerAdapter(RedisSubscriber redisSubscriber) {
        return new MessageListenerAdapter(redisSubscriber);
    }

    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer(
            RedisConnectionFactory connectionFactory, MessageListenerAdapter messageListenerAdapter) {
        log.info("+++ subscriber => {}", this.topic);

        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.addMessageListener(messageListenerAdapter, new ChannelTopic(this.topic));
        return container;
    }
}

5、订阅后的解析

import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.stereotype.Component;

@Component
@Slf4j
public class RedisSubscriber implements MessageListener {

    @Override
    public void onMessage(Message message, byte[] pattern) {
        String channel = new String(message.getChannel());
        String messageBody = new String(message.getBody());
        log.info("{} => {} ", channel, messageBody);

        // 处理接收到的消息
    }
}