package cn.com.goldenwater.config;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;

import java.time.Duration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

@Configuration
public class RedisCacheConfig extends CachingConfigurerSupport {

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        // 生成一个默认配置，通过config对象即可对缓存进行自定义配置
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        // 设置缓存的默认过期时间，也是使用Duration设置
        config = config.entryTtl(Duration.ofMinutes(1))
                // 不缓存空值
                .disableCachingNullValues();
        // 设置一个初始化的缓存空间set集合
        Set<String> cacheNames = new HashSet<>();
        cacheNames.add("timeGroup");
        cacheNames.add("user");
        // 对每个缓存空间应用不同的配置
        Map<String, RedisCacheConfiguration> configMap = new HashMap<>(2);
        configMap.put("timeGroup", config);
        configMap.put("user", config.entryTtl(Duration.ofMinutes(1)));
        // 使用自定义的缓存配置初始化一个cacheManager
        return RedisCacheManager.builder(redisConnectionFactory)
                // 注意这两句的调用顺序，一定要先调用该方法设置初始化的缓存名，再初始化相关的配置
                .initialCacheNames(cacheNames)
                .withInitialCacheConfigurations(configMap)
                .build();
    }

}