package com.bdqn.redis.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
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 org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.lang.reflect.Method;
import java.time.Duration;
/**
 * @author cuishujian
 * @date 2024/9/25
 */
@Configuration
@EnableCaching// 開啟緩存
public class RedisConfig extends CachingConfigurerSupport {
    /**
     * 自定義生成 key的規(guī)則
     * 緩存對(duì)象集合中，緩存是以 key-value 形式保存的
     * 當(dāng)不指定緩存的 key時(shí)，SpringBoot會(huì)使用 SimpleKeyGenerator 生成 key
     * @return
     */
    @Bean
    public KeyGenerator keyGenerator(){
        return new KeyGenerator(){
            public Object generate(Object target, Method method, Object... params){
                // 格式化緩存key字符串
                StringBuilder sb = new StringBuilder();
                // 追加類名
                sb.append(target.getClass().getName());
                // 追加方法名
                sb.append(method.getName());
                // 遍歷參數(shù)并且追加
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 解決查詢緩存轉(zhuǎn)換異常的問題
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        // 使用Jackson2JsonRedisSerialize 替換默認(rèn)序列化
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(om, Object.class);
        // 設(shè)置value的序列化對(duì)象和key的序列化對(duì)象
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
    /**
     * 采用RedisCacheManager作為緩存管理器
     */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory){
        // 創(chuàng)建Redis序列化對(duì)象
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        // 解決查詢緩存轉(zhuǎn)換異常的問題
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        // 創(chuàng)建Jackson的序列化對(duì)象
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(om, Object.class);
        // 配置序列化(解決亂碼問題)
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                // 7天緩存過期
                .entryTtl(Duration.ofDays(7))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}