SpringBoot 中 Redis Template 配置

[lvxianchao]

Redis Config

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.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * Author: lvxianchao
 * Date: 2023-03-03 14:32
 * Description: Redis Config
 */
@Configuration
public class RedisConfig {

    @Bean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        // 连接池
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 序列化器
        redisTemplate.setDefaultSerializer(new StringRedisSerializer());
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
        // 支持事务
        redisTemplate.setEnableTransactionSupport(true);

        return redisTemplate;
    }

    /**
     * Redis Key 过期监听
     *
     * @param redisConnectionFactory RedisConnectionFactory
     *
     * @return RedisMessageListenerContainer
     */
    @Bean
    RedisMessageListenerContainer redisMessageListenerContainer(RedisConnectionFactory redisConnectionFactory) {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(redisConnectionFactory);

        return container;
    }

}

[lvxianchao]

Redis Key 过期事件监听器

import lombok.extern.slf4j.Slf4j;
import org.jetbrains.annotations.NotNull;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * Author: lvxc
 * Date: 2023-03-21 15:10
 * Description:
 */
@Component
@Slf4j
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {

    /**
     * Creates new {@link MessageListener} for {@code __keyevent@*__:expired} messages.
     *
     * @param listenerContainer must not be {@literal null}.
     */
    public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }

    @Override
    public void onMessage(@NotNull Message message, byte[] pattern) {
        String key = message.toString();
        log.info("监听到过期的 Redis Key = {}", key);
    }
}