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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.Collections.Generic;
using System.Runtime;
using System.ServiceModel.Diagnostics;
abstract class InputQueueChannel<TDisposable> : ChannelBase
where TDisposable : class, IDisposable
{
InputQueue<TDisposable> inputQueue;
protected InputQueueChannel(ChannelManagerBase channelManager)
: base(channelManager)
{
this.inputQueue = TraceUtility.CreateInputQueue<TDisposable>();
}
public int InternalPendingItems
{
get
{
return this.inputQueue.PendingCount;
}
}
public int PendingItems
{
get
{
ThrowIfDisposedOrNotOpen();
return InternalPendingItems;
}
}
public void EnqueueAndDispatch(TDisposable item)
{
EnqueueAndDispatch(item, null);
}
public void EnqueueAndDispatch(TDisposable item, Action dequeuedCallback, bool canDispatchOnThisThread)
{
OnEnqueueItem(item);
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
inputQueue.EnqueueAndDispatch(item, dequeuedCallback, canDispatchOnThisThread);
}
public void EnqueueAndDispatch(Exception exception, Action dequeuedCallback, bool canDispatchOnThisThread)
{
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
inputQueue.EnqueueAndDispatch(exception, dequeuedCallback, canDispatchOnThisThread);
}
public void EnqueueAndDispatch(TDisposable item, Action dequeuedCallback)
{
OnEnqueueItem(item);
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
inputQueue.EnqueueAndDispatch(item, dequeuedCallback);
}
public bool EnqueueWithoutDispatch(Exception exception, Action dequeuedCallback)
{
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
return inputQueue.EnqueueWithoutDispatch(exception, dequeuedCallback);
}
public bool EnqueueWithoutDispatch(TDisposable item, Action dequeuedCallback)
{
OnEnqueueItem(item);
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
return inputQueue.EnqueueWithoutDispatch(item, dequeuedCallback);
}
public void Dispatch()
{
// NOTE: don't need to check IsDisposed here: InputQueue will handle dispose
inputQueue.Dispatch();
}
public void Shutdown()
{
inputQueue.Shutdown();
}
protected override void OnFaulted()
{
base.OnFaulted();
inputQueue.Shutdown(() => this.GetPendingException());
}
protected virtual void OnEnqueueItem(TDisposable item)
{
}
protected IAsyncResult BeginDequeue(TimeSpan timeout, AsyncCallback callback, object state)
{
this.ThrowIfNotOpened();
return inputQueue.BeginDequeue(timeout, callback, state);
}
protected bool EndDequeue(IAsyncResult result, out TDisposable item)
{
bool dequeued = inputQueue.EndDequeue(result, out item);
if (item == null)
{
this.ThrowIfFaulted();
this.ThrowIfAborted();
}
return dequeued;
}
protected bool Dequeue(TimeSpan timeout, out TDisposable item)
{
this.ThrowIfNotOpened();
bool dequeued = inputQueue.Dequeue(timeout, out item);
if (item == null)
{
this.ThrowIfFaulted();
this.ThrowIfAborted();
}
return dequeued;
}
protected bool WaitForItem(TimeSpan timeout)
{
this.ThrowIfNotOpened();
bool dequeued = inputQueue.WaitForItem(timeout);
this.ThrowIfFaulted();
this.ThrowIfAborted();
return dequeued;
}
protected IAsyncResult BeginWaitForItem(TimeSpan timeout, AsyncCallback callback, object state)
{
this.ThrowIfNotOpened();
return inputQueue.BeginWaitForItem(timeout, callback, state);
}
protected bool EndWaitForItem(IAsyncResult result)
{
bool dequeued = inputQueue.EndWaitForItem(result);
this.ThrowIfFaulted();
this.ThrowIfAborted();
return dequeued;
}
protected override void OnClosing()
{
base.OnClosing();
inputQueue.Shutdown(() => this.GetPendingException());
}
protected override void OnAbort()
{
inputQueue.Close();
}
protected override void OnClose(TimeSpan timeout)
{
inputQueue.Close();
}
protected override IAsyncResult OnBeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
inputQueue.Close();
return new CompletedAsyncResult(callback, state);
}
protected override void OnEndClose(IAsyncResult result)
{
CompletedAsyncResult.End(result);
}
}
}
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