/// <summary>
/// Transmits a message.
/// </summary>
/// <param name="msg">The message to transmit.</param>
public void TransmitMessage(MultiPartMessage msg)
{
if (_isDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (!_isRunning)
{
throw new InvalidOperationException("Message Engine is not running.");
}
CheckMetadata(msg);
AdapterBase adapter = AdapterProxy.GetAdapterById(msg.Metadata.ReadAsString("SendAdapterId"));
ComponentPipeline pipeline = _sendPipelineDictionary[adapter];
Collection <MultiPartMessage> resultCollection = pipeline.Execute(msg);
if (resultCollection != null)
{
//Check if message should be part of a transaction
if (TransactionScope.Current != null)
{
if (adapter is ITransactional)
{
ITransactional transactionalAdapter = adapter as ITransactional;
AdapterTransaction transaction = transactionalAdapter.StartTransaction(resultCollection[0]);
transaction.State = TransactionState.Started;
TransactionScope.Current.EnlistTransaction(transaction);
transactionalAdapter.TransmitMessage(resultCollection[0], transaction);
}
else
{
throw new AdapterException("Adapter: \"" + adapter.AdapterId + "\" is not transactional.");
}
}
else
{
adapter.TransmitMessage(resultCollection[0]);
}
}
}
/// <summary>
/// Binds a pipeline to an adapter.
/// </summary>
/// <param name="adapter">The <see cref="AdapterBase"/> to bind to.</param>
/// <param name="pipeline">The <see cref="ComponentPipeline"/> to bind.</param>
/// <remarks>
/// When a pipeline has ben bound, all messages sent or received by the adapter will be
/// passed through the pipeline for processing.
/// </remarks>
public void Bind(AdapterBase adapter, ComponentPipeline pipeline)
{
if (_isDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if ((MessageEngine.Instance.Tracing.Switch.Level & SourceLevels.Information) == SourceLevels.Information)
{
MessageEngine.Instance.Tracing.TraceEvent(TraceEventType.Information, 0, "Binding adapter: \"{0}\".", adapter.AdapterId);
}
if (adapter == null)
{
throw new ArgumentNullException("adapter");
}
else if (pipeline == null)
{
throw new ArgumentNullException("pipeline");
}
if (pipeline.PipelineType == PipelineType.Receive)
{
_receivePipelineDictionary[adapter] = pipeline;
}
else
{
_sendPipelineDictionary[adapter] = pipeline;
}
if (!_adapterCollection.Contains(adapter))
{
adapter.MessageReceived += new EventHandler <AdapterReceiveEventArgs>(MessageReceivedEventHandler);
_adapterCollection.Add(adapter);
_adapterProxy.RegisterAdapter(adapter);
}
}
private void MessageReceivedEventHandler(object sender, AdapterReceiveEventArgs e)
{
if (!_isRunning)
{
return;
}
MultiPartMessage msg = e.Message;
try
{
//Block incoming messages if startup in progress
_blockThreadsWaitEvent.WaitOne();
//Create message metadata
msg.Metadata.Write("ReceiveUri", e.ReceiveEndPoint.Uri);
msg.Metadata.Write("ReceiveAdapterId", e.ReceiveEndPoint.Adapter.AdapterId);
ComponentPipeline pipeline = _receivePipelineDictionary[e.ReceiveEndPoint.Adapter];
Collection <MultiPartMessage> resultCollection = pipeline.Execute(msg);
if (resultCollection != null)
{
List <CorrelationContext> contextCollection = new List <CorrelationContext>();
foreach (MultiPartMessage resultMsg in resultCollection)
{
CorrelationContext context = CorrelateMessage(resultMsg);
if (context == null)
{
SubscriptionManager.DistributeMessage(resultMsg);
}
else
{
contextCollection.Add(context);
}
}
foreach (CorrelationContext context in contextCollection)
{
//Signal the requestor thread that a response has been received
context.CompleteRequest();
}
}
}
catch (Exception ex)
{
if (ExceptionHelper.IsCritical(ex))
{
throw;
}
else if ((MessageEngine.Instance.Tracing.Switch.Level & SourceLevels.Error) == SourceLevels.Error && _isRunning)
{
if (msg != null)
{
MessageEngine.Instance.Tracing.TraceData(TraceEventType.Error, msg.GetHashCode(), ex);
}
else
{
MessageEngine.Instance.Tracing.TraceData(TraceEventType.Error, 0, ex);
}
}
}
}