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/*
 * Copyright (c) 2019-2029, Dreamlu 卢春梦 ([email protected] & www.dreamlu.net).
 * 

 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 

 * http://www.gnu.org/licenses/lgpl.html
 * 

 * 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 net.dreamlu.mica.redis.config;

import net.dreamlu.mica.core.utils.CharPool;
import net.dreamlu.mica.core.utils.StringPool;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration;
import org.springframework.boot.autoconfigure.cache.CacheManagerCustomizers;
import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.lang.Nullable;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * 扩展redis-cache支持注解cacheName添加超时时间
 * 

 *
 * @author L.cm
 */
@EnableCaching
@AutoConfiguration(before = CacheAutoConfiguration.class)
@EnableConfigurationProperties(CacheProperties.class)
public class MicaRedisCacheAutoConfiguration {

	/**
	 * 序列化方式
	 */
	private final RedisSerializer redisSerializer;
	private final CacheProperties cacheProperties;
	private final CacheManagerCustomizers customizerInvoker;
	@Nullable
	private final RedisCacheConfiguration redisCacheConfiguration;

	MicaRedisCacheAutoConfiguration(RedisSerializer redisSerializer,
									CacheProperties cacheProperties,
									CacheManagerCustomizers customizerInvoker,
									ObjectProvider redisCacheConfiguration) {
		this.redisSerializer = redisSerializer;
		this.cacheProperties = cacheProperties;
		this.customizerInvoker = customizerInvoker;
		this.redisCacheConfiguration = redisCacheConfiguration.getIfAvailable();
	}

	@Primary
	@Bean("cacheResolver")
	public CacheManager redisCacheManager(ObjectProvider connectionFactoryObjectProvider) {
		RedisConnectionFactory connectionFactory = connectionFactoryObjectProvider.getIfAvailable();
		Objects.requireNonNull(connectionFactory, "Bean RedisConnectionFactory is null.");
		RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
		RedisCacheConfiguration cacheConfiguration = this.determineConfiguration();
		List cacheNames = this.cacheProperties.getCacheNames();
		Map initialCaches = new LinkedHashMap<>();
		if (!cacheNames.isEmpty()) {
			Map cacheConfigMap = new LinkedHashMap<>(cacheNames.size());
			cacheNames.forEach(it -> cacheConfigMap.put(it, cacheConfiguration));
			initialCaches.putAll(cacheConfigMap);
		}
		boolean allowInFlightCacheCreation = true;
		boolean enableTransactions = false;
		RedisAutoCacheManager cacheManager = new RedisAutoCacheManager(
			redisCacheWriter, cacheConfiguration, allowInFlightCacheCreation, initialCaches
		);
		cacheManager.setTransactionAware(enableTransactions);
		return this.customizerInvoker.customize(cacheManager);
	}

	private RedisCacheConfiguration determineConfiguration() {
		if (this.redisCacheConfiguration != null) {
			return this.redisCacheConfiguration;
		} else {
			CacheProperties.Redis redisProperties = this.cacheProperties.getRedis();
			RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
			// 设置默认缓存名分割符号为 “:”，如果已经带 “:” 则不设置。
			config = config.computePrefixWith(name -> name.endsWith(StringPool.COLON) ? name : name + CharPool.COLON);
			config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer));
			if (redisProperties.getTimeToLive() != null) {
				config = config.entryTtl(redisProperties.getTimeToLive());
			}
			if (redisProperties.getKeyPrefix() != null) {
				config = config.prefixCacheNameWith(redisProperties.getKeyPrefix());
			}
			if (!redisProperties.isCacheNullValues()) {
				config = config.disableCachingNullValues();
			}
			if (!redisProperties.isUseKeyPrefix()) {
				config = config.disableKeyPrefix();
			}
			return config;
		}
	}
}
    

    

    

            

    

            



    
    






    
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