Burrow.BurrowConsumer.WaitAndHandleMessageDelivery C# (CSharp) Метод

        internal void WaitAndHandleMessageDelivery(Action<BasicDeliverEventArgs> handler)
        {
            try
            {
                BasicDeliverEventArgs deliverEventArgs = null;
                lock (_sharedQueueLock)
                {
#if DEBUG
                    _watcher.DebugFormat("1. Wait the semaphore to release");
                    _pool.WaitOne();
                    _watcher.DebugFormat("2. Semaphore released, wait a msg from RabbitMQ. Probably a wait-for-ack message is blocking this");
#else
                    _pool.WaitOne();
#endif
					if (_status == ConsumerStatus.Active)
                    {
                        deliverEventArgs = Dequeue();
                    }
#if DEBUG

                    _watcher.DebugFormat("3. Msg from RabbitMQ arrived (probably the previous msg has been acknownledged), prepare to handle it");
#endif
                }
                if (deliverEventArgs != null)
                {
                    lock (Subscription.OutstandingDeliveryTags)
                    {
                        Subscription.OutstandingDeliveryTags[deliverEventArgs.ConsumerTag].Add(deliverEventArgs.DeliveryTag);
                    }

                    handler(deliverEventArgs);
                }
                else
                {
                    _watcher.ErrorFormat("Message arrived but it's null for some reason, properly a serious BUG :D, contact author asap, release semaphore for other messages");
                    _pool.Release();
                }
            }
            catch (EndOfStreamException)
            {
                // This thread will be ended soon because the new consumer will be created
                // do nothing here, EOS fired when queue is closed
                // Looks like the connection has gone away, so wait a little while
                // before continuing to poll the queue
                Thread.Sleep(100);
#if DEBUG
                _watcher.DebugFormat("EndOfStreamException occurs, release the semaphore for another message");

#endif
                _pool.Release();
            }
        }