/
ChannelFactoryBase.cs
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/
ChannelFactoryBase.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Runtime;
using System.Threading.Tasks;
namespace System.ServiceModel.Channels
{
public abstract class ChannelFactoryBase : ChannelManagerBase, IChannelFactory, IAsyncChannelFactory
{
private TimeSpan _closeTimeout = ServiceDefaults.CloseTimeout;
private TimeSpan _openTimeout = ServiceDefaults.OpenTimeout;
private TimeSpan _receiveTimeout = ServiceDefaults.ReceiveTimeout;
private TimeSpan _sendTimeout = ServiceDefaults.SendTimeout;
protected ChannelFactoryBase()
{
}
protected ChannelFactoryBase(IDefaultCommunicationTimeouts timeouts)
{
InitializeTimeouts(timeouts);
}
protected override TimeSpan DefaultCloseTimeout
{
get { return _closeTimeout; }
}
protected override TimeSpan DefaultOpenTimeout
{
get { return _openTimeout; }
}
protected override TimeSpan DefaultReceiveTimeout
{
get { return _receiveTimeout; }
}
protected override TimeSpan DefaultSendTimeout
{
get { return _sendTimeout; }
}
public virtual T GetProperty<T>()
where T : class
{
if (typeof(T) == typeof(IChannelFactory))
{
return (T)(object)this;
}
return default(T);
}
protected override void OnAbort()
{
}
protected override IAsyncResult OnBeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
return new CompletedAsyncResult(callback, state);
}
protected internal override Task OnCloseAsync(TimeSpan timeout)
{
return TaskHelpers.CompletedTask();
}
protected override void OnClose(TimeSpan timeout)
{
}
protected override void OnEndClose(IAsyncResult result)
{
CompletedAsyncResult.End(result);
}
private void InitializeTimeouts(IDefaultCommunicationTimeouts timeouts)
{
if (timeouts != null)
{
_closeTimeout = timeouts.CloseTimeout;
_openTimeout = timeouts.OpenTimeout;
_receiveTimeout = timeouts.ReceiveTimeout;
_sendTimeout = timeouts.SendTimeout;
}
}
}
public abstract class ChannelFactoryBase<TChannel> : ChannelFactoryBase, IChannelFactory<TChannel>
{
private CommunicationObjectManager<IChannel> _channels;
protected ChannelFactoryBase()
: this(null)
{
}
protected ChannelFactoryBase(IDefaultCommunicationTimeouts timeouts)
: base(timeouts)
{
_channels = new CommunicationObjectManager<IChannel>(ThisLock);
}
public TChannel CreateChannel(EndpointAddress address)
{
if (address == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(address));
}
return InternalCreateChannel(address, address.Uri);
}
public TChannel CreateChannel(EndpointAddress address, Uri via)
{
if (address == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(address));
}
if (via == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(via));
}
return InternalCreateChannel(address, via);
}
private TChannel InternalCreateChannel(EndpointAddress address, Uri via)
{
ValidateCreateChannel();
TChannel channel = OnCreateChannel(address, via);
bool success = false;
try
{
_channels.Add((IChannel)(object)channel);
success = true;
}
finally
{
if (!success)
{
((IChannel)(object)channel).Abort();
}
}
return channel;
}
protected abstract TChannel OnCreateChannel(EndpointAddress address, Uri via);
protected void ValidateCreateChannel()
{
ThrowIfDisposed();
if (State != CommunicationState.Opened)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SRP.Format(SRP.ChannelFactoryCannotBeUsedToCreateChannels, GetType().ToString())));
}
}
protected override void OnAbort()
{
IChannel[] currentChannels = _channels.ToArray();
foreach (IChannel channel in currentChannels)
{
channel.Abort();
}
_channels.Abort();
}
protected override void OnClose(TimeSpan timeout)
{
IChannel[] currentChannels = _channels.ToArray();
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
foreach (IChannel channel in currentChannels)
{
channel.Close(timeoutHelper.RemainingTime());
}
_channels.Close(timeoutHelper.RemainingTime());
}
protected internal override Task OnCloseAsync(TimeSpan timeout)
{
return OnCloseAsyncInternal(timeout);
}
protected override IAsyncResult OnBeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
return OnCloseAsync(timeout).ToApm(callback, state);
}
protected override void OnEndClose(IAsyncResult result)
{
result.ToApmEnd();
}
private async Task OnCloseAsyncInternal(TimeSpan timeout)
{
IChannel[] currentChannels = _channels.ToArray();
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
foreach (IChannel channel in currentChannels)
{
await CloseOtherAsync(channel, timeoutHelper.RemainingTime());
}
// CommunicationObjectManager (_channels) is not a CommunicationObject,
// and it's close method waits for it to not be busy. Calling CloseAsync
// is the correct option here as there's no need to block this thread
// waiting on a signal from another thread to notify it's no longer busy.
await _channels.CloseAsync(timeoutHelper.RemainingTime());
}
}
}