SpringBoot Caffeine+Redisson配置二级缓存实践

<!--caffeine-->
<dependency>
    <groupId>com.github.ben-manes.caffeine</groupId>
    <artifactId>caffeine</artifactId>
</dependency>

package com.example.redisson.config;

import com.example.redisson.manager.PlusSpringCacheManager;
import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.concurrent.TimeUnit;

/**
 * 缓存配置
 *
 * @author Lion Li
 */
@Configuration
@EnableCaching
public class CacheConfig {

    /**
     * caffeine 本地缓存处理器
     */
    @Bean
    public Cache<Object, Object> caffeine() {
        return Caffeine.newBuilder()
            // 设置最后一次写入或访问后经过固定时间过期
            .expireAfterWrite(30, TimeUnit.SECONDS)
            // 初始的缓存空间大小
            .initialCapacity(100)
            // 缓存的最大条数
            .maximumSize(1000)
            .build();
    }

    /**
     * 自定义缓存管理器 整合spring-cache
     */
    @Bean
    public CacheManager cacheManager() {
        return new PlusSpringCacheManager();
    }

}

package org.dromara.common.redis.manager;

import cn.hutool.core.lang.Console;
import org.dromara.common.core.utils.SpringUtils;
import org.springframework.cache.Cache;

import java.util.concurrent.Callable;

/**
 * Cache 装饰器模式(用于扩展 Caffeine 一级缓存)
 *
 * @author LionLi
 */
public class CaffeineCacheDecorator implements Cache {

    private static final com.github.benmanes.caffeine.cache.Cache<Object, Object>
            CAFFEINE = SpringUtils.getBean("caffeine");

    private final Cache cache;

    public CaffeineCacheDecorator(Cache cache) {
        this.cache = cache;
    }

    @Override
    public String getName() {
        return cache.getName();
    }

    @Override
    public Object getNativeCache() {
        return cache.getNativeCache();
    }

    public String getUniqueKey(Object key) {
        return cache.getName() + ":" + key;
    }

    @Override
    public ValueWrapper get(Object key) {
        Object o = CAFFEINE.get(getUniqueKey(key), k -> cache.get(key));
        Console.log("redisson caffeine -> key: " + getUniqueKey(key) + ",value:" + o);
        return (ValueWrapper) o;
    }

    @SuppressWarnings("unchecked")
    public <T> T get(Object key, Class<T> type) {
        Object o = CAFFEINE.get(getUniqueKey(key), k -> cache.get(key, type));
        Console.log("redisson caffeine -> key: " + getUniqueKey(key) + ",value:" + o);
        return (T) o;
    }

    @Override
    public void put(Object key, Object value) {
        cache.put(key, value);
    }

    public ValueWrapper putIfAbsent(Object key, Object value) {
        return cache.putIfAbsent(key, value);
    }

    @Override
    public void evict(Object key) {
        evictIfPresent(key);
    }

    public boolean evictIfPresent(Object key) {
        boolean b = cache.evictIfPresent(key);
        if (b) {
            CAFFEINE.invalidate(getUniqueKey(key));
        }
        return b;
    }

    @Override
    public void clear() {
        cache.clear();
    }

    public boolean invalidate() {
        return cache.invalidate();
    }

    @SuppressWarnings("unchecked")
    @Override
    public <T> T get(Object key, Callable<T> valueLoader) {
        Object o = CAFFEINE.get(getUniqueKey(key), k -> cache.get(key, valueLoader));
        Console.log("redisson caffeine -> key: " + getUniqueKey(key) + ",value:" + o);
        return (T) o;
    }

}

@Cacheable(cacheNames = "demo:cache#60s#10m#20", key = "#key", condition = "#key != null")
@GetMapping("/test1")
public R<String> test1(String key, String value) {
    System.out.println("test1-->调用方法体");
    return R.ok("操作成功", value);
}

package com.example.redisson.utils;

import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.redisson.api.RMap;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;

import java.util.Set;

/**
 * 缓存操作工具类 {@link }
 *
 * @author Michelle.Chung
 * @date 2022/8/13
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
@SuppressWarnings(value = {"unchecked"})
public class CacheUtils {

    private static final CacheManager CACHE_MANAGER = SpringUtils.getBean(CacheManager.class);

    /**
     * 获取缓存组内所有的KEY
     *
     * @param cacheNames 缓存组名称
     */
    public static Set<Object> keys(String cacheNames) {
        RMap<Object, Object> rmap = (RMap<Object, Object>) CACHE_MANAGER.getCache(cacheNames).getNativeCache();
        return rmap.keySet();
    }

    /**
     * 获取缓存值
     *
     * @param cacheNames 缓存组名称
     * @param key        缓存key
     */
    public static <T> T get(String cacheNames, Object key) {
        Cache.ValueWrapper wrapper = CACHE_MANAGER.getCache(cacheNames).get(key);
        return wrapper != null ? (T) wrapper.get() : null;
    }

    /**
     * 保存缓存值
     *
     * @param cacheNames 缓存组名称
     * @param key        缓存key
     * @param value      缓存值
     */
    public static void put(String cacheNames, Object key, Object value) {
        CACHE_MANAGER.getCache(cacheNames).put(key, value);
    }

    /**
     * 删除缓存值
     *
     * @param cacheNames 缓存组名称
     * @param key        缓存key
     */
    public static void evict(String cacheNames, Object key) {
        CACHE_MANAGER.getCache(cacheNames).evict(key);
    }

    /**
     * 清空缓存值
     *
     * @param cacheNames 缓存组名称
     */
    public static void clear(String cacheNames) {
        CACHE_MANAGER.getCache(cacheNames).clear();
    }

}