100 lines
3.6 KiB
Java
100 lines
3.6 KiB
Java
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package com.example.scaffold.cache;
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import com.github.benmanes.caffeine.cache.Caffeine;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
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import org.springframework.cache.CacheManager;
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import org.springframework.cache.annotation.EnableCaching;
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import org.springframework.cache.caffeine.CaffeineCacheManager;
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import org.springframework.cache.interceptor.KeyGenerator;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.Primary;
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import org.springframework.data.redis.cache.RedisCacheConfiguration;
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import org.springframework.data.redis.cache.RedisCacheManager;
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import org.springframework.data.redis.connection.RedisConnectionFactory;
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import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
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import org.springframework.data.redis.serializer.RedisSerializationContext;
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import org.springframework.data.redis.serializer.StringRedisSerializer;
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import java.time.Duration;
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import java.util.concurrent.TimeUnit;
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/**
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* 缓存配置 - 支持 Caffeine(本地) 和 Redis(分布式)
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*
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* 学习要点：
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* 1. @EnableCaching - 启用 Spring Cache
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* 2. @Cacheable - 缓存方法结果
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* 3. @CacheEvict - 清除缓存
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* 4. @CachePut - 更新缓存
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*/
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@Slf4j
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@Configuration
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@EnableCaching
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public class CacheConfig {
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/**
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* Caffeine 本地缓存 - 默认
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*/
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@Bean
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@Primary
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@ConditionalOnProperty(name = "cache.type", havingValue = "caffeine", matchIfMissing = true)
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public CacheManager caffeineCacheManager() {
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log.info("🚀 启用 Caffeine 本地缓存");
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CaffeineCacheManager cacheManager = new CaffeineCacheManager();
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cacheManager.setCaffeine(Caffeine.newBuilder()
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// 初始容量
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.initialCapacity(100)
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// 最大容量
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.maximumSize(1000)
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// 写入后过期时间
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.expireAfterWrite(10, TimeUnit.MINUTES)
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// 记录命中率
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.recordStats()
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);
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return cacheManager;
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}
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/**
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* Redis 分布式缓存
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*/
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@Bean
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@ConditionalOnProperty(name = "cache.type", havingValue = "redis")
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public CacheManager redisCacheManager(RedisConnectionFactory connectionFactory) {
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log.info("🚀 启用 Redis 分布式缓存");
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RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
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// 键序列化
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.serializeKeysWith(RedisSerializationContext.SerializationPair
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.fromSerializer(new StringRedisSerializer()))
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// 值序列化
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.serializeValuesWith(RedisSerializationContext.SerializationPair
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.fromSerializer(new GenericJackson2JsonRedisSerializer()))
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// 过期时间
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.entryTtl(Duration.ofMinutes(10))
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// 不缓存 null
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.disableCachingNullValues();
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return RedisCacheManager.builder(connectionFactory)
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.cacheDefaults(config)
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.transactionAware()
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.build();
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}
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/**
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* 自定义缓存 Key 生成器
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*/
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@Bean
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public KeyGenerator customKeyGenerator() {
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return (target, method, params) -> {
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StringBuilder sb = new StringBuilder();
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sb.append(target.getClass().getSimpleName()).append(":");
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sb.append(method.getName()).append(":");
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for (Object param : params) {
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sb.append(param).append("-");
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}
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return sb.toString();
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};
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}
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}
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