private void MessageDispatcher_NOTIFY(MsgSourceInfo src, IMessage imsg)
{
try
{
// convert remoting message to the array
byte[] buffer = RemotingConvert.ToArray(imsg);
// notify
IRemotingResponse ro = (IRemotingResponse)Activator.GetObject(typeof(IRemotingResponse), NotifyUrl);
ro.ResponseNotify(src, buffer);
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver.MessageDispatcher_NOTIFY done, url={1}",
ChannelName, NotifyUrl));
}
catch(Exception ex)
{
string strErr = string.Format("[{0}]MSMQChannel.Receiver.MessageDispatcher_NOTIFY failed at url={1}, error={2};",
ChannelName, NotifyUrl, ex.Message);
WriteLogMsg(strErr, EventLogEntryType.Error);
}
}
public void MessageWorker(object source)
{
// scope state
int intNumberOfWorkers = 0;
bool bTransactional = true;
Exception exception = null;
IMessage msgReq = null;
IMessage msgRsp = null;
Message msg = null;
MessageQueue mq = source as MessageQueue;
MessageQueueTransaction mqtx = new MessageQueueTransaction();
try
{
// check-in
intNumberOfWorkers = Interlocked.Increment(ref m_NumberOfWorkers);
// transactional flag
bTransactional = mq.Transactional;
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver:MessageWorker check-in #{1}, isTxQueue={2}",
ChannelName, intNumberOfWorkers, bTransactional));
// begin single transaction
if(bTransactional)
mqtx.Begin();
// retrieve transactional message (message has been retrieved from the queue)
msg = mq.Receive(TimeSpan.FromSeconds(1), mqtx);
// signal to manager
if(intNumberOfWorkers < MaxNumberOfWorkers)
m_EventMgr.Set();
else
m_EventMgr.Reset();
// remoting message from the client
msgReq = msg.Body as IMessage;
// work around!!!
msgReq.Properties[MSMQChannelProperties.Uri] = msgReq.Properties[MSMQChannelProperties.ObjectUri];
// option: target object
if(NotifyUrl == MSMQChannelDefaults.EmptyStr)
{
// Dispatch message to the remoting object
msgRsp = MessageDispatcher(msgReq, msg.BodyStream);
}
else
{
// pack the source info
MsgSourceInfo src = new MsgSourceInfo();
src.Acknowledgment = msg.Acknowledgment;
src.MessageSentTime = msg.SentTime;
src.ResponseQueuePath = msg.ResponseQueue == null ? "null" : msg.ResponseQueue.Path;
src.ReportQueuePath = mq.Path;
// Call Notification Object
MessageDispatcher_NOTIFY(src, msgReq);
}
// commit transaction (message is going to be removed from the queue)
if(bTransactional)
mqtx.Commit();
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver.MessageWorker The call has been invoked on {1}",
ChannelName, msg.Label));
// response
if(AcknowledgeUrl != MSMQChannelDefaults.EmptyStr)
{
// workaround
if(msgRsp != null)
{
msgRsp.Properties[MSMQChannelProperties.Uri] = msgReq.Properties[MSMQChannelProperties.Uri];
msgRsp.Properties[MSMQChannelProperties.MethodName] = msgReq.Properties["__MethodName"];
msgRsp.Properties[MSMQChannelProperties.TypeName] = msgReq.Properties["__TypeName"];
}
// remoting notification
MessageDispatcher_ACK(msgRsp == null ? msgReq : msgRsp);
}
}
catch(MessageQueueException ex)
{
// save for a notification issue
exception = ex;
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver:MessageWorker error/warning = {1}", ChannelName, ex.Message));
}
catch(Exception ex)
{
// save for a notification issue
exception = ex;
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver:MessageWorker error/warning = {1}", ChannelName, ex.Message));
}
finally
{
bool bRetryDone = false;
if(bTransactional && mqtx.Status == MessageQueueTransactionStatus.Pending)
{
// check the retry filter
int posRules = (RetryFilter == MSMQChannelDefaults.EmptyStr) ? 0 : RetryFilter.IndexOf(exception.Message);
if(posRules < 0 && exception.InnerException != null)
posRules = RetryFilter.IndexOf(exception.InnerException.Message);
// send message to the retry queue
if(msg != null && msgReq != null && RetryCounter > 0 && posRules < 0)
{
// remoting notification
bRetryDone = MessageDispatcher_RETRY(mqtx, msg, msgReq);
}
// commit transaction (message is going to be removed from the queue)
mqtx.Commit();
}
// exception notification
if(exception != null && msg != null && msgReq != null && bRetryDone == false && ExceptionUrl != MSMQChannelDefaults.EmptyStr)
{
// remoting notification
MessageDispatcher_ERROR(msgReq, exception);
}
// clean-up
if(msg != null)
msg.Dispose();
// check-out
intNumberOfWorkers = Interlocked.Decrement(ref m_NumberOfWorkers);
if(intNumberOfWorkers < MaxNumberOfWorkers)
m_EventMgr.Set();
else
m_EventMgr.Reset();
// echo
Trace.WriteLine(string.Format("[{0}]MSMQChannel.Receiver:MessageWorker check-out #{1}, isTxQueue={2}",
ChannelName, intNumberOfWorkers, bTransactional));
}
}