/*
 * Copyright 2019-2029 geekidea(https://github.com/geekidea)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.geekidea.springbootplus.config;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
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.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * <p>
 * Redis Cache配置
 * </p>
 *
 * @author geekidea
 * @date 2018-11-08
 */
@Configuration
@EnableCaching
public class RedisCacheConfig extends CachingConfigurerSupport {

    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return (target, method, params) -> {
            StringBuffer redisKey = new StringBuffer();
            redisKey.append(target.getClass().getName()).append("-");
            redisKey.append(method.getName());
            if (params.length > 0) {
                redisKey.append("-").append(Arrays.deepToString(params));
            }
            return redisKey.toString();
        };
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        // 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
        // 过期时间30分钟
        config = config.entryTtl(Duration.ofMinutes(30)).prefixKeysWith("cache");

        // 设置一个初始化的缓存空间set集合
//        Set<String> cacheNames = new HashSet<>();
//        cacheNames.add("expireKey");
//        cacheNames.add("my-redis-cache2");

        // 对每个缓存空间应用不同的配置
        Map<String, RedisCacheConfiguration> configMap = new HashMap<>(10);
        configMap.put("expireKey", config);

        // 使用自定义的缓存配置初始化一个cacheManager
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                // 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)
                .cacheDefaults(config)
                .withInitialCacheConfigurations(configMap)
                .build();

        return cacheManager;
    }

}
