public virtual AsyncTransmitterEndpoint GetEndpoint(IBaseMessage message)
{
// Provide a virtual "CreateEndpointParameters" method to map message to endpoint
EndpointParameters endpointParameters = CreateEndpointParameters(message);
lock (endpoints)
{
AsyncTransmitterEndpoint endpoint = (AsyncTransmitterEndpoint)endpoints[endpointParameters.SessionKey];
if (null == endpoint)
{
// we haven't seen this location so far this batch so make a new endpoint
endpoint = (AsyncTransmitterEndpoint)Activator.CreateInstance(this.endpointType, new object[] { this });
if (null == endpoint)
{
throw new CreateEndpointFailed(this.endpointType.FullName, endpointParameters.OutboundLocation);
}
endpoint.Open(endpointParameters, this.HandlerPropertyBag, this.PropertyNamespace);
if (endpoint.ReuseEndpoint)
{
endpoints[endpointParameters.SessionKey] = endpoint;
}
}
return(endpoint);
}
}
protected virtual void Worker()
{
// Depending on the circumstances we might want to sort the messages form BizTalk into
// sub-batches each of which would be processed independently.
// If we sort into subbatches we will need a "Leave" for each otherwise do all the "Leaves" here
// In this code we have only one batch. If a sort into subbatches was added this number might change.
int BatchCount = 1;
int MessageCount = this.messages.Count;
int LeaveCount = MessageCount - BatchCount;
for (int i = 0; i < LeaveCount; i++)
{
this.asyncTransmitter.Leave();
}
bool needToLeave = true;
try
{
using (Batch batch = new TransmitResponseBatch(this.transportProxy, new TransmitResponseBatch.AllWorkDoneDelegate(AllWorkDone)))
{
foreach (IBaseMessage message in this.messages)
{
AsyncTransmitterEndpoint endpoint = null;
try
{
// Get appropriate endpoint for the message. Should always be non-null
endpoint = (AsyncTransmitterEndpoint)asyncTransmitter.GetEndpoint(message);
// ask the endpoint to process the message
IBaseMessage responseMsg = endpoint.ProcessMessage(message);
// success so tell the EPM we are finished with this message
batch.DeleteMessage(message);
if (responseMsg != null)
{
batch.SubmitResponseMessage(message, responseMsg);
}
//if we crash we could send duplicates - documentation point
}
catch (AdapterException e)
{
HandleException(e, batch, message);
}
catch (Exception e)
{
HandleException(new ErrorTransmitUnexpectedClrException(e.Message), batch, message);
}
finally
{
if (endpoint != null && endpoint.ReuseEndpoint == false)
{
endpoint.Dispose();
endpoint = null;
}
}
}
// If the Done call is successful then the callback will be called and Leave will be called there
batch.Done(null);
needToLeave = false; // Done didn't throw so no Need To Leave
}
}
finally
{
// We need to Leave from this thread because the Done call failed and so there won't be any callback happening
if (needToLeave)
{
this.asyncTransmitter.Leave();
}
}
}
