feat: 显示缓存 Clear 方法

src/blazor/admin/BootstrapAdmin.Web.Core/Services/DefaultCacheManager.cs

@@ -1,19 +1,27 @@
 using BootstrapBlazor.Web.Core;
 using Microsoft.Extensions.Caching.Memory;
+using Microsoft.Extensions.Primitives;
 
 namespace BootstrapAdmin.Web.Core.Services;
 
 class DefaultCacheManager : ICacheManager
 {
-    private IMemoryCache Cache { get; }
+    [NotNull]
+    private IMemoryCache? Cache { get; set; }
 
-    private List<string> Keys { get; } = new List<string>(256);
+    private List<(string Key, CancellationTokenSource Token)> Keys { get; } = new(256);
 
     /// <summary>
     /// 
     /// </summary>
-    public DefaultCacheManager()
+    private DefaultCacheManager()
     {
+        Init();
+    }
+
+    private void Init()
+    {
+        Keys.Clear();
         Cache = new MemoryCache(new MemoryCacheOptions());
     }
 
@@ -38,21 +46,54 @@ class DefaultCacheManager : ICacheManager
 
     private void HandlerEntry(string key, ICacheEntry entry)
     {
-        Keys.Add(key);
-        entry.SetAbsoluteExpiration(TimeSpan.FromSeconds(10));
+        (string Key, CancellationTokenSource Token) cacheKey = new();
+        cacheKey.Key = key;
+
+        if (entry.AbsoluteExpiration == null || entry.SlidingExpiration == null || entry.AbsoluteExpirationRelativeToNow == null)
+        {
+            // 缓存 10 分钟
+            entry.SlidingExpiration = TimeSpan.FromSeconds(600);
+        }
+
+        if (entry.ExpirationTokens.Count == 0)
+        {
+            // 增加缓存 Token
+            cacheKey.Token = new CancellationTokenSource();
+            entry.AddExpirationToken(new CancellationChangeToken(cacheKey.Token.Token));
+        }
+
         entry.RegisterPostEvictionCallback((key, value, reason, state) =>
         {
+            // 清理过期缓存键值
             var k = key.ToString();
             if (!string.IsNullOrEmpty(k))
             {
-                Keys.Remove(k);
+                var item = Keys.LastOrDefault(item => item.Key == k);
+                if (item.Key != null)
+                {
+                    Keys.Remove(item);
+                }
             }
         });
+        Keys.Add(cacheKey);
     }
 
     public void Clear(string? key)
     {
-        throw new NotImplementedException();
+        if (!string.IsNullOrEmpty(key))
+        {
+            var cacheKey = Keys.LastOrDefault(item => item.Key == key);
+            if (cacheKey.Token != null)
+            {
+                cacheKey.Token.Cancel();
+                cacheKey.Token.Dispose();
+            }
+            Keys.Remove(cacheKey);
+        }
+        else
+        {
+            Init();
+        }
     }
 
     #region 静态方法