public override bool HandlePeekedMessage(IMsmqTransport transport, OpenedQueue queue, Message message)
{
using (var tx = transactionStrategy.Begin())
{
var processMessageAt = DateTime.FromBinary(BitConverter.ToInt64(message.Extension, 16));
if (CurrentTime >= processMessageAt)
{
return(false);
}
string id;
if (queueStrategy.TryMoveMessage(queue, message, SubQueue.Timeout, out id) == false)
{
logger.DebugFormat("Failed to move message to timeout queue");
return(false);
}
tx.Complete();
logger.DebugFormat("Moving message {0} to timeout queue, will be processed at: {1}",
id, processMessageAt);
timeoutMessageIds.Write(writer => writer.Add(processMessageAt, id));
return(true);
}
}
private void RemoveAllReadyToWorkMessages()
{
using (var tx = _transactionStrategy.Begin())
using (var readyForWorkQueue = MsmqUtil.GetQueuePath(Endpoint).Open(QueueAccessMode.SendAndReceive))
using (var enumerator = readyForWorkQueue.GetMessageEnumerator2())
{
try
{
while (enumerator.MoveNext())
{
while (
enumerator.Current != null &&
enumerator.Current.Label == typeof(ReadyToWork).FullName)
{
var current = enumerator.TransactionalRemoveCurrent();
HandleLoadBalancerMessage(readyForWorkQueue, current);
}
}
}
catch (MessageQueueException e)
{
if (e.MessageQueueErrorCode != MessageQueueErrorCode.IOTimeout)
{
throw;
}
}
readyForWork.Clear();
tx.Complete();
}
}
public void CreateDatabase()
{
try
{
_transaction.Begin();
_transaction.Commit();
}
catch (Exception ex)
{
Log.Error("PL-E-CREATEDB, ", ex);
_transaction.Rollback();
}
}
public void ReceiveMessageInTransaction(OpenedQueue queue, string messageId, Func <CurrentMessageInformation, bool> messageArrived, Action <CurrentMessageInformation, Exception> messageProcessingCompleted, Action <CurrentMessageInformation> beforeMessageTransactionCommit, Action <CurrentMessageInformation> beforeMessageTransactionRollback)
{
using (var tx = _transactionStrategy.Begin())
{
var message = queue.TryGetMessageFromQueue(messageId);
if (message == null)
{
return;// someone else got our message, better luck next time
}
ProcessMessage(message, queue, tx, messageArrived, beforeMessageTransactionCommit, beforeMessageTransactionRollback, messageProcessingCompleted);
}
}
private void ReceiveMessage(object context)
{
while (shouldContinue)
{
try
{
queueManager.Peek(queueName);
}
catch (TimeoutException)
{
logger.DebugFormat("Could not find a message on {0} during the timeout period",
endpoint);
continue;
}
catch (ObjectDisposedException)
{
logger.DebugFormat("Shutting down the transport for {0} thread {1}", endpoint, context);
return;
}
catch (EsentErrorException e)
{
// we were shut down, so just return
if (e.Error == JET_err.TermInProgress)
{
logger.DebugFormat("Shutting down the transport for {0} thread {1}", endpoint, context);
}
else
{
logger.Error("An error occured while recieving a message, shutting down message processing thread", e);
}
return;
}
if (shouldContinue == false)
{
return;
}
using (var tx = transactionStrategy.Begin())
{
Message message;
try
{
message = queueManager.Receive(queueName, TimeSpan.FromSeconds(1));
}
catch (TimeoutException)
{
logger.DebugFormat("Could not find a message on {0} during the timeout period",
endpoint);
continue;
}
catch (EsentErrorException e)
{
// we were shut down, so just return
if (e.Error == JET_err.TermInProgress)
{
return;
}
logger.Error("An error occured while recieving a message, shutting down message processing thread", e);
return;
}
catch (Exception e)
{
logger.Error("An error occured while recieving a message, shutting down message processing thread", e);
return;
}
try
{
var msgType = (MessageType)Enum.Parse(typeof(MessageType), message.Headers["type"]);
logger.DebugFormat("Starting to handle message {0} of type {1} on {2}",
message.Id,
msgType,
endpoint);
switch (msgType)
{
case MessageType.AdministrativeMessageMarker:
ProcessMessage(message, tx,
AdministrativeMessageArrived,
AdministrativeMessageProcessingCompleted,
null,
null);
break;
case MessageType.ShutDownMessageMarker:
//ignoring this one
tx.Complete();
break;
case MessageType.TimeoutMessageMarker:
var timeToSend = XmlConvert.ToDateTime(message.Headers["time-to-send"], XmlDateTimeSerializationMode.Utc);
if (timeToSend > DateTime.Now)
{
timeout.Register(message);
queue.MoveTo(SubQueue.Timeout.ToString(), message);
tx.Complete();
}
else
{
ProcessMessage(message, tx,
MessageArrived,
MessageProcessingCompleted,
BeforeMessageTransactionCommit,
BeforeMessageTransactionRollback);
}
break;
default:
ProcessMessage(message, tx,
MessageArrived,
MessageProcessingCompleted,
BeforeMessageTransactionCommit,
BeforeMessageTransactionRollback);
break;
}
}
catch (Exception exception)
{
logger.Debug("Could not process message", exception);
}
}
}
}
