Example #1
0
        private async Task MessageReceivedAsync(QueueMessage <TMessage> message, CancellationToken cancellationToken)
        {
            using (var performanceLogger = new PerformanceLogger(performanceLoggingMethodName))
            {
                try
                {
                    if (Behaviour == AcknowledgeBehaviour.BeforeProcess)
                    {
                        _queueConsumer.AcknowledgeMessage(message.DeliveryTag);
                    }

                    await ProcessMessageAsync(message.Message, message.DeliveryTag, cancellationToken, message.RoutingKey);

                    if (Behaviour == AcknowledgeBehaviour.AfterProcess)
                    {
                        _queueConsumer.AcknowledgeMessage(message.DeliveryTag);
                    }

                    if (Behaviour != AcknowledgeBehaviour.Never && Behaviour != AcknowledgeBehaviour.Deferred)
                    {
                        _logger.InfoFormat(Resources.MessageProcessedLogEntry, message.DeliveryTag);
                    }
                }
                catch (AlreadyClosedException ex)
                {
                    _logger.Warn($"The connection to Rabbit was closed while processing message with deliveryTag '{message.DeliveryTag}', error details - '{ex.Message}'.");
                }
                catch (FatalErrorException e)
                {
                    if (Behaviour == AcknowledgeBehaviour.AfterProcess ||
                        Behaviour == AcknowledgeBehaviour.Async)
                    {
                        _queueConsumer.NegativelyAcknowledgeAndRequeue(message.DeliveryTag);
                    }

                    _logger.Fatal(Resources.FatalErrorLogEntry, e);
                }
                catch (Exception e)
                {
                    _logger.ErrorFormat(Resources.ProcessingErrorLogEntry, message.DeliveryTag, e);

                    if (Behaviour == AcknowledgeBehaviour.AfterProcess ||
                        Behaviour == AcknowledgeBehaviour.Async)
                    {
                        _queueConsumer.NegativelyAcknowledge(message.DeliveryTag);
                    }
                }
            }
        }
        private Func <Task> RunSequentialProcessor(ProcessingQueue <TMessage> processingQueue, CancellationToken cancellationToken)
        {
            return(async() =>
            {
                QueueMessage <TMessage> dequeuedMessage;
                while (!cancellationToken.IsCancellationRequested && processingQueue.Queue.TryPeek(out dequeuedMessage))
                {
                    using (var performanceLogger = new PerformanceLogger(performanceLoggingMethodName))
                    {
                        _logger.DebugFormat(Resources.MessageReceivedLogEntry, dequeuedMessage.DeliveryTag);

                        try
                        {
                            await ProcessMessageAsync(
                                dequeuedMessage.Message,
                                dequeuedMessage.DeliveryTag,
                                cancellationToken,
                                dequeuedMessage.RoutingKey);

                            if (Behaviour != AcknowledgeBehaviour.Async)
                            {
                                _queueConsumer.AcknowledgeMessage(dequeuedMessage.DeliveryTag);
                            }

                            _logger.InfoFormat(Resources.MessageProcessedLogEntry, dequeuedMessage.DeliveryTag);
                        }
                        catch (FatalErrorException e)
                        {
                            _logger.Fatal(Resources.FatalErrorLogEntry, e);
                            _queueConsumer.NegativelyAcknowledgeAndRequeue(dequeuedMessage.DeliveryTag);
                            throw;
                        }
                        catch (Exception e)
                        {
                            _logger.ErrorFormat(Resources.ProcessingErrorLogEntry, dequeuedMessage.DeliveryTag, e);
                            _queueConsumer.NegativelyAcknowledge(dequeuedMessage.DeliveryTag);
                        }
                    }

                    // we have finished processing - remove the message from the queue and wait for the next one.
                    processingQueue.Queue.TryDequeue(out dequeuedMessage);
                    await processingQueue.AutoResetEvent.WaitOneAsync();
                }
            });
        }