public void Receive(Func <IReceiveContext, Action <IReceiveContext> > callback, TimeSpan timeout)
{
int messageCount = Count;
bool waited = false;
if (messageCount == 0)
{
if (!_messageReady.WaitOne(timeout, true))
{
return;
}
waited = true;
}
bool monitorExitNeeded = true;
if (!Monitor.TryEnter(_messageLock, timeout))
{
return;
}
try
{
for (LinkedListNode <LoopbackMessage> iterator = _messages.First;
iterator != null;
iterator = iterator.Next)
{
if (iterator.Value != null)
{
LoopbackMessage message = iterator.Value;
if (message.ExpirationTime.HasValue && message.ExpirationTime <= DateTime.UtcNow)
{
_messages.Remove(iterator);
return;
}
ReceiveContext context = ReceiveContext.FromBodyStream(message.Body);
context.SetMessageId(message.MessageId);
context.SetContentType(message.ContentType);
context.SetOriginalMessageId(message.OriginalMessageId);
if (message.ExpirationTime.HasValue)
{
context.SetExpirationTime(message.ExpirationTime.Value);
}
Action <IReceiveContext> receive = callback(context);
if (receive == null)
{
continue;
}
_messages.Remove(iterator);
using (message)
{
Monitor.Exit(_messageLock);
monitorExitNeeded = false;
receive(context);
return;
}
}
}
if (waited)
{
return;
}
// we read to the end and none were accepted, so we are going to wait until we get another in the queue
_messageReady.WaitOne(timeout, true);
}
finally
{
if (monitorExitNeeded)
{
Monitor.Exit(_messageLock);
}
}
}