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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.Runtime;
using System.ServiceModel;
using System.ServiceModel.Security.Tokens;
sealed class MsmqOutputChannel : TransportOutputChannel
{
MsmqQueue msmqQueue;
MsmqTransactionMode transactionMode;
readonly byte[] preamble; // cached .NET framing singleton preamble
SynchronizedDisposablePool<MsmqOutputMessage<IOutputChannel>> outputMessages;
MsmqChannelFactory<IOutputChannel> factory;
SecurityTokenProviderContainer certificateTokenProvider;
public MsmqOutputChannel(MsmqChannelFactory<IOutputChannel> factory, EndpointAddress to, Uri via, bool manualAddressing)
: base(factory, to, via, manualAddressing, factory.MessageVersion)
{
// construct the .NET framing preamble used for every message
byte[] modeBytes = ClientSingletonSizedEncoder.ModeBytes;
EncodedVia encodedVia = new EncodedVia(this.Via.AbsoluteUri);
EncodedContentType encodedContentType = EncodedContentType.Create(factory.MessageEncoderFactory.Encoder.ContentType);
this.preamble = DiagnosticUtility.Utility.AllocateByteArray(modeBytes.Length + ClientSingletonSizedEncoder.CalcStartSize(encodedVia, encodedContentType));
Buffer.BlockCopy(modeBytes, 0, this.preamble, 0, modeBytes.Length);
ClientSingletonSizedEncoder.EncodeStart(this.preamble, modeBytes.Length, encodedVia, encodedContentType);
this.outputMessages = new SynchronizedDisposablePool<MsmqOutputMessage<IOutputChannel>>(factory.MaxPoolSize);
if (factory.IsMsmqX509SecurityConfigured)
{
this.certificateTokenProvider = factory.CreateX509TokenProvider(to, via);
}
this.factory = factory;
}
void CloseQueue()
{
this.outputMessages.Dispose();
if (null != this.msmqQueue)
this.msmqQueue.Dispose();
this.msmqQueue = null;
}
void OnCloseCore(bool isAborting, TimeSpan timeout)
{
this.CloseQueue();
this.outputMessages.Dispose();
if (factory.IsMsmqX509SecurityConfigured)
{
if (isAborting)
this.certificateTokenProvider.Abort();
else
this.certificateTokenProvider.Close(timeout);
}
}
protected override IAsyncResult OnBeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
OnCloseCore(false, timeout);
return new CompletedAsyncResult(callback, state);
}
protected override void OnEndClose(IAsyncResult result)
{
CompletedAsyncResult.End(result);
}
protected override void OnClose(TimeSpan timeout)
{
OnCloseCore(false, timeout);
}
protected override void OnAbort()
{
OnCloseCore(true, TimeSpan.Zero);
}
void OnOpenCore(TimeSpan timeout)
{
OpenQueue();
if (factory.IsMsmqX509SecurityConfigured)
{
this.certificateTokenProvider.Open(timeout);
}
}
void OpenQueue()
{
try
{
this.msmqQueue = new MsmqQueue(this.factory.AddressTranslator.UriToFormatName(this.RemoteAddress.Uri),
UnsafeNativeMethods.MQ_SEND_ACCESS);
}
catch (MsmqException ex)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(ex.Normalized);
}
if (this.factory.ExactlyOnce)
{
this.transactionMode = MsmqTransactionMode.CurrentOrSingle;
}
else
{
this.transactionMode = MsmqTransactionMode.None;
}
}
protected override IAsyncResult OnBeginOpen(TimeSpan timeout, AsyncCallback callback, object state)
{
OnOpenCore(timeout);
return new CompletedAsyncResult(callback, state);
}
protected override void OnEndOpen(IAsyncResult result)
{
CompletedAsyncResult.End(result);
}
protected override void OnOpen(TimeSpan timeout)
{
OnOpenCore(timeout);
}
protected override IAsyncResult OnBeginSend(Message message, TimeSpan timeout, AsyncCallback callback, object state)
{
OnSend(message, timeout);
return new CompletedAsyncResult(callback, state);
}
protected override void OnEndSend(IAsyncResult result)
{
CompletedAsyncResult.End(result);
}
protected override void OnSend(Message message, TimeSpan timeout)
{
// serialize the indigo message to byte array and copy the .NET framing preamble
ArraySegment<byte> messageData = this.factory.MessageEncoderFactory.Encoder.WriteMessage(
message, int.MaxValue, this.factory.BufferManager, preamble.Length);
Buffer.BlockCopy(preamble, 0, messageData.Array, messageData.Offset - preamble.Length, preamble.Length);
byte[] buffer = messageData.Array;
int offset = messageData.Offset - preamble.Length;
int size = messageData.Count + preamble.Length;
MsmqOutputMessage<IOutputChannel> msmqMessage = this.outputMessages.Take();
if (msmqMessage == null)
{
msmqMessage = new MsmqOutputMessage<IOutputChannel>(this.factory, size, this.RemoteAddress);
MsmqDiagnostics.PoolFull(this.factory.MaxPoolSize);
}
try
{
msmqMessage.ApplyCertificateIfNeeded(this.certificateTokenProvider, this.factory.MsmqTransportSecurity.MsmqAuthenticationMode, timeout);
msmqMessage.Body.EnsureBufferLength(size);
msmqMessage.Body.BufferLength = size;
Buffer.BlockCopy(buffer, offset, msmqMessage.Body.Buffer, 0, size);
this.factory.BufferManager.ReturnBuffer(buffer);
bool lockHeld = false;
try
{
Msmq.EnterXPSendLock(out lockHeld, this.factory.MsmqTransportSecurity.MsmqProtectionLevel);
this.msmqQueue.Send(msmqMessage, this.transactionMode);
MsmqDiagnostics.DatagramSent(msmqMessage.MessageId, message);
}
catch (MsmqException ex)
{
if (ex.FaultSender)
this.Fault();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(ex.Normalized);
}
finally
{
if (lockHeld)
{
Msmq.LeaveXPSendLock();
}
}
}
finally
{
if (!this.outputMessages.Return(msmqMessage))
{
msmqMessage.Dispose();
}
}
}
}
}
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