/// <summary>
/// Does the recieve and execute using message queue transaction manager.
/// </summary>
/// <param name="mq">The message queue.</param>
/// <param name="status">The transactional status.</param>
/// <returns>true if should continue peeking, false otherise</returns>
protected virtual bool DoRecieveAndExecuteUsingMessageQueueTransactionManager(MessageQueue mq,
ITransactionStatus status)
{
#region Logging
if (LOG.IsDebugEnabled)
{
LOG.Debug("Executing DoRecieveAndExecuteUsingMessageQueueTransactionManager");
}
#endregion Logging
Message message;
#region Receive message
try
{
message = mq.Receive(TimeSpan.Zero, QueueUtils.GetMessageQueueTransaction(null));
}
catch (MessageQueueException ex)
{
if (ex.MessageQueueErrorCode == MessageQueueErrorCode.IOTimeout)
{
//expected to occur occasionally
if (LOG.IsTraceEnabled)
{
LOG.Trace("IOTimeout: Message to receive was already processed by another thread.");
}
status.SetRollbackOnly();
return(false); // no more peeking unless this is the last listener thread
}
else
{
// A real issue in receiving the message
#region Logging
if (LOG.IsErrorEnabled)
{
LOG.Error("Error receiving message from DefaultMessageQueue [" + mq.Path +
"], closing queue and clearing connection cache.");
}
#endregion
lock (messageQueueMonitor)
{
mq.Close();
MessageQueue.ClearConnectionCache();
}
throw; // will cause rollback in MessageQueueTransactionManager and log exception
}
}
#endregion
if (message == null)
{
#region Logging
if (LOG.IsTraceEnabled)
{
LOG.Trace("Message recieved is null from Queue = [" + mq.Path + "]");
}
#endregion
status.SetRollbackOnly();
return(false); // no more peeking unless this is the last listener thread
}
try
{
#region Logging
if (LOG.IsDebugEnabled)
{
LOG.Debug("Received message [" + message.Id + "] on queue [" + mq.Path + "]");
}
#endregion
MessageReceived(message);
DoExecuteListener(message);
#region Logging
if (LOG.IsTraceEnabled)
{
LOG.Trace("MessageListener executed");
}
#endregion
}
catch (Exception ex)
{
//Exception may indicate rollback of database transaction in service layer.
//Let the handler determine if the message should be removed from the queue.
TransactionAction action =
HandleTransactionalListenerException(ex, message, QueueUtils.GetMessageQueueTransaction(null));
if (action == TransactionAction.Rollback)
{
#region Logging
if (LOG.IsDebugEnabled)
{
LOG.Debug(
"Exception handler's TransactionAction has rolled back MessageQueueTransaction for queue [" +
mq.Path + "]");
}
#endregion
status.SetRollbackOnly();
return(false); // no more peeking unless this is the last listener thread
}
else
{
LOG.Info("Committing MessageQueueTransaction due to explicit commit request by exception handler.");
}
}
finally
{
message.Dispose();
}
return(true);
}
