integrated_traffic/src/main/java/com/zcloud/util/CaffeineUtil.java

package com.zcloud.util;

import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.zcloud.entity.PageData;
import com.zcloud.mapper.datasource.system.DictionariesMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

/**
 * 说明：缓存
 * 作者：wangxuan
 * 官网：www.zcloudchina.com
 */
@Component
public class CaffeineUtil {
    private static final Logger logger = Logger.getLogger(CaffeineUtil.class.getName());

    /**
     * @Description: 登录token
     * @Author: dearLin
     * @Date: 2023/6/12/012 9:27
     * @Param: [] []
     * @Return: com.github.benmanes.caffeine.cache.Cache<java.lang.String, java.lang.Object>
     */
    @Bean(name = "loginToken")
    public Cache<String, String> loginToken() {
        Cache<String, String> loginToken = Caffeine.newBuilder()
                // 30分钟
                .expireAfterAccess(30, TimeUnit.MINUTES)
                // 当垃圾收集器需要释放内存时驱逐
                .softValues()
                .removalListener(((key, value, cause) -> {
                    //清理通知 key,value ==> 键值对   cause ==> 清理原因
                    System.out.printf("Key %s was removed (%s)%n", key, cause);
                })).build();
        return loginToken;
    }
}