SimpleRecyclingCache.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Util / SimpleRecyclingCache.cs / 3 / SimpleRecyclingCache.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 * SimpleRecyclingCache class 
 *
 * Copyright (c) 1999 Microsoft Corporation 
 */

namespace System.Web.Util {
 
using System.Collections;
 
/* 
 * The purpose of this class is to provide a simple and efficient cache.
 * Instead of using fancy logic to expire items, it uses a simple heuristic: 
 * when the number of entry reaches a fixed limit, the cache is reset.
 */
internal class SimpleRecyclingCache {
 
    private const int MAX_SIZE = 100;
    private static Hashtable _hashtable; 
 
    internal SimpleRecyclingCache() {
        CreateHashtable(); 
    }

    // Create or recreate the hastable
    private void CreateHashtable() { 
        _hashtable = new Hashtable(MAX_SIZE, StringComparer.OrdinalIgnoreCase);
    } 
 
    internal object this[object key] {
        get { 
            return _hashtable[key];
        }
        set {
            lock (this) { 
                // The limit was reached, so reset everything
                if (_hashtable.Count >= MAX_SIZE) 
                    _hashtable.Clear(); 

                _hashtable[key] = value; 
            }
        }
    }
 
}
 
}

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