public MessageDelivery Dequeue(string id, TimeSpan timeout)
{
if (_disposed)
{
throw new ObjectDisposedException("MsmqMessageDeliveryQueue");
}
try
{
using (System.Messaging.MessageEnumerator msgEnum = _queue.GetMessageEnumerator2())
{
if (msgEnum.Current.Label == id)
{
Message message = _queue.ReceiveById(msgEnum.Current.Id, _transactionType);
return(createObject(message));
}
}
return(null);
}
catch (MessageQueueException ex)
{
if (ex.MessageQueueErrorCode == MessageQueueErrorCode.IOTimeout)
{
throw new TimeoutException("The timeout was reached before the specified message could be returned.");
}
else if (ex.MessageQueueErrorCode == MessageQueueErrorCode.MessageNotFound)
{
return(default(MessageDelivery));
}
throw;
}
}
protected override void ReceiveMessage(MessageEnumerator enumerator, TimeSpan timeout, Action<Func<Message>> receiveAction)
{
receiveAction(() =>
{
if (_log.IsDebugEnabled)
_log.DebugFormat("Removing message {0} from queue {1}", enumerator.Current.Id, Address);
return enumerator.RemoveCurrent(timeout, MessageQueueTransactionType.Automatic);
});
}
/// <summary>
/// Returns number of message's in message queue
/// </summary>
/// <param name="queue">MessageQueue : queue</param>
/// <returns>integer</returns>
private int GetMessageCount(MessageQueue queue)
{
int totalCount = 0;
try
{
System.Messaging.MessageEnumerator me = queue.GetMessageEnumerator2();
while (me.MoveNext(new TimeSpan(0, 0, 0)))
{
totalCount++;
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return(totalCount);
}
protected override void ReceiveMessage(MessageEnumerator enumerator, TimeSpan timeout,
Action<Message> receiveAction)
{
var options = new TransactionOptions
{
IsolationLevel = _isolationLevel,
Timeout = _transactionTimeout,
};
using (var scope = new TransactionScope(TransactionScopeOption.Required, options))
{
using (Message message = enumerator.RemoveCurrent(timeout, MessageQueueTransactionType.Automatic))
{
receiveAction(message);
}
scope.Complete();
}
}
protected virtual void ReceiveMessage(MessageEnumerator enumerator, TimeSpan timeout,
Action<Func<Message>> receiveAction)
{
receiveAction(() => enumerator.RemoveCurrent(timeout, MessageQueueTransactionType.None));
}
protected virtual void ReceiveMessage(MessageEnumerator enumerator, TimeSpan timeout,
Action<Message> receiveAction)
{
using (Message message = enumerator.RemoveCurrent(timeout, MessageQueueTransactionType.None))
{
receiveAction(message);
}
}
