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ServerBase/Cache/CacheBase.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+using Newtonsoft.Json;
+
+
+using ServerCore; using ServerBase;
+
+
+namespace ServerBase;
+
+public abstract class CacheBase
+{
+    public DateTime CreatedDateTime { get; set; }
+    public DateTime UpdatedDateTime { get; set; }
+    public DateTime ExpireDateTime { get; set; }
+
+    public CacheBase()
+    {
+        applyUpdatedDateTime();
+    }
+
+    protected void applyCreatedDateTime()
+    {
+        CreatedDateTime = DateTimeHelper.Current;
+        applyUpdatedDateTime();
+    }
+
+    protected void applyExpireDateTime(TimeSpan elapsedTime)
+    {
+        ExpireDateTime = DateTimeHelper.Current + elapsedTime;
+        applyUpdatedDateTime();
+    }
+
+    protected void applyUpdatedDateTime()
+    {
+        UpdatedDateTime = DateTimeHelper.Current;
+    }
+
+    public string toJsonString()
+    {
+        return $"{JsonConvert.SerializeObject(this)}";
+    }
+}