71 lines
2.7 KiB
C#
71 lines
2.7 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.ServiceModel.Security
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{
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using System;
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using System.Collections;
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using System.Runtime;
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using System.ServiceModel;
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using System.ServiceModel.Diagnostics.Application;
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sealed class NegotiationTokenAuthenticatorStateCache<T> : TimeBoundedCache
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where T : NegotiationTokenAuthenticatorState
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{
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static int lowWaterMark = 50;
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static TimeSpan purgingInterval = TimeSpan.FromMinutes(10);
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TimeSpan cachingSpan;
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public NegotiationTokenAuthenticatorStateCache(TimeSpan cachingSpan, int maximumCachedState)
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: base(lowWaterMark, maximumCachedState, null, PurgingMode.TimerBasedPurge, TimeSpan.FromTicks(cachingSpan.Ticks >> 2), true)
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{
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this.cachingSpan = cachingSpan;
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}
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public void AddState(string context, T state)
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{
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DateTime expirationTime = TimeoutHelper.Add(DateTime.UtcNow, this.cachingSpan);
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bool wasStateAdded = base.TryAddItem(context, state, expirationTime, false);
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if (!wasStateAdded)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new SecurityNegotiationException(SR.GetString(SR.NegotiationStateAlreadyPresent, context)));
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}
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if (TD.NegotiateTokenAuthenticatorStateCacheRatioIsEnabled())
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{
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TD.NegotiateTokenAuthenticatorStateCacheRatio(base.Count, base.Capacity);
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}
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}
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public T GetState(string context)
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{
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return (this.GetItem(context) as T);
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}
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public void RemoveState(string context)
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{
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this.TryRemoveItem(context);
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if (TD.NegotiateTokenAuthenticatorStateCacheRatioIsEnabled())
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{
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TD.NegotiateTokenAuthenticatorStateCacheRatio(base.Count, base.Capacity);
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}
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}
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protected override ArrayList OnQuotaReached(Hashtable cacheTable)
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{
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if (TD.NegotiateTokenAuthenticatorStateCacheExceededIsEnabled())
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{
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TD.NegotiateTokenAuthenticatorStateCacheExceeded(SR.GetString(SR.CachedNegotiationStateQuotaReached, this.Capacity));
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}
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new QuotaExceededException(SR.GetString(SR.CachedNegotiationStateQuotaReached, this.Capacity)));
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}
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protected override void OnRemove(object item)
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{
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((IDisposable)item).Dispose();
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base.OnRemove(item);
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}
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}
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}
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