From 1b43670626f48266efb898ec7cd7deedcab9ba10 Mon Sep 17 00:00:00 2001
From: puzhibing <393733352@qq.com>
Date: 星期六, 17 八月 2024 15:31:23 +0800
Subject: [PATCH] Merge branch 'master' of http://120.76.84.145:10101/gitblit/r/java/mx_charging_pile
---
ruoyi-service/ruoyi-account/src/main/java/com/ruoyi/account/wx/tools/WxCaffineCache.java | 122 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 122 insertions(+), 0 deletions(-)
diff --git a/ruoyi-service/ruoyi-account/src/main/java/com/ruoyi/account/wx/tools/WxCaffineCache.java b/ruoyi-service/ruoyi-account/src/main/java/com/ruoyi/account/wx/tools/WxCaffineCache.java
new file mode 100644
index 0000000..5c40a14
--- /dev/null
+++ b/ruoyi-service/ruoyi-account/src/main/java/com/ruoyi/account/wx/tools/WxCaffineCache.java
@@ -0,0 +1,122 @@
+package com.ruoyi.account.wx.tools;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.util.StringUtils;
+
+import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author xiaochen
+ * @ClassName AbstractCaffineCache
+ * @Description
+ * @date 2021-01-11 11:27
+ */
+@Slf4j
+class WxCaffineCache<T> implements WxCacheTemplate<T> {
+ /**
+ * 缓存环境
+ */
+ private String env = "wx";
+
+ /**
+ * 本地缓存实例
+ */
+ private LoadingCache<String, Object> loadingCache;
+
+ /**
+ * 构造函数
+ *
+ */
+ public WxCaffineCache() {
+ WxCache cache = WxCache.options().setTimeUnit(TimeUnit.SECONDS).build();
+ // 构建本地缓存实例
+ this.loadingCache = caffineCacheManage(cache);
+ }
+
+
+ @Override
+ public boolean setKey(String key, T value) {
+ if (Objects.isNull(this.loadingCache)) {
+ return Boolean.FALSE;
+ }
+ if (StringUtils.hasLength(this.env)) {
+ this.loadingCache.put(this.env + ":" + key, value);
+ } else {
+ this.loadingCache.put(key, value);
+ }
+ return Boolean.TRUE;
+ }
+
+ @Override
+ public T getKey(String key) {
+ if (Objects.isNull(this.loadingCache)) {
+ return null;
+ }
+ try {
+ if (StringUtils.hasLength(this.env)) {
+ return (T) this.loadingCache.get(this.env + ":" + key);
+ } else {
+ return (T) this.loadingCache.get(key);
+ }
+ } catch (Exception e) {
+ return null;
+ }
+ }
+
+ @Override
+ public boolean delKey(String key) {
+ if (Objects.isNull(this.loadingCache)) {
+ return Boolean.FALSE;
+ }
+ if (StringUtils.hasLength(this.env)) {
+ this.loadingCache.invalidate(this.env + ":" + key);
+ } else {
+ this.loadingCache.invalidate(key);
+ }
+ return Boolean.TRUE;
+ }
+
+ /**
+ * 缓存管理
+ *
+ * @param cache
+ * @param <T>
+ * @return
+ */
+ private static <T> LoadingCache<String, T> caffineCacheManage(WxCache cache) {
+ log.info("初始化缓存的实体数据：{}", cache);
+ if (Objects.isNull(cache)) {
+ throw new NullPointerException("请实例化一个Cache对象!");
+ }
+ LoadingCache<String, T> localcache =
+ // 构建本地缓存，调用链的方式
+ // ,1000是设置缓存的初始化容量，maximumSize是设置缓存最大容量，当超过了最大容量，guava将使用LRU算法（最少使用算法），来移除缓存项
+ // expireAfterAccess(12,TimeUnit.HOURS)设置缓存有效期为12个小时
+ Caffeine.newBuilder().initialCapacity(cache.getInitialCapacity()).maximumSize(cache.getMaximumSize())
+ // 设置写缓存后n秒钟过期
+ // .expireAfterWrite(30, TimeUnit.SECONDS)
+ .expireAfterWrite(cache.getDuration(), cache.getTimeunit())
+ // 设置读写缓存后n秒钟过期,实际很少用到,类似于expireAfterWrite
+ //.expireAfterAccess(googleCache.getDuration(), googleCache.getTimeunit())
+ // 只阻塞当前数据加载线程，其他线程返回旧值
+ //.refreshAfterWrite(10, TimeUnit.SECONDS)
+ // 设置缓存的移除通知//用户手动移除EXPLICIT,
+ // //用户手动替换REPLACED,//被垃圾回收COLLECTED,//超时过期EXPIRED,//SIZE由于缓存大小限制
+ .removalListener(new RemovalListener<String, T>() {
+ @Override
+ public void onRemoval(String key, Object value, RemovalCause cause) {
+ log.info(key + ":" + value + ":" + cause.name());
+ }
+ })
+ // build里面要实现一个匿名抽象类
+ .build(new CacheLoader<String, T>() {
+ // 这个方法是默认的数据加载实现,get的时候，如果key没有对应的值，就调用这个方法进行加载。此处是没有默认值则返回null
+ @Override
+ public T load(String key) throws Exception {
+ return null;
+ }
+ });
+ return localcache;
+ }
+}
--
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