Beispiel #1
0
        protected override async Task OnSendAsync(IEnumerable <EventData> eventDatas, string partitionKey)
        {
            bool shouldRetry;
            int  retryCount = 0;

            var timeoutHelper = new TimeoutHelper(EventHubClient.ConnectionStringBuilder.OperationTimeout, startTimeout: true);

            do
            {
                using (AmqpMessage amqpMessage = AmqpMessageConverter.EventDatasToAmqpMessage(eventDatas, partitionKey))
                {
                    shouldRetry = false;

                    try
                    {
                        try
                        {
                            // Always use default timeout for AMQP sesssion.
                            SendingAmqpLink amqpLink = await SendLinkManager.GetOrCreateAsync(
                                TimeSpan.FromSeconds(AmqpClientConstants.AmqpSessionTimeoutInSeconds)).ConfigureAwait(false);

                            if (amqpLink.Settings.MaxMessageSize.HasValue)
                            {
                                ulong size = (ulong)amqpMessage.SerializedMessageSize;
                                if (size > amqpLink.Settings.MaxMessageSize.Value)
                                {
                                    throw new MessageSizeExceededException(amqpMessage.DeliveryId.Value, size, amqpLink.Settings.MaxMessageSize.Value);
                                }
                            }

                            Outcome outcome = await amqpLink.SendMessageAsync(
                                amqpMessage,
                                GetNextDeliveryTag(),
                                AmqpConstants.NullBinary,
                                timeoutHelper.RemainingTime()).ConfigureAwait(false);

                            if (outcome.DescriptorCode != Accepted.Code)
                            {
                                Rejected rejected = (Rejected)outcome;
                                throw new AmqpException(rejected.Error);
                            }
                        }
                        catch (AmqpException amqpException)
                        {
                            throw AmqpExceptionHelper.ToMessagingContract(amqpException.Error);
                        }
                    }
                    catch (Exception ex)
                    {
                        // Evaluate retry condition?
                        TimeSpan?retryInterval = RetryPolicy.GetNextRetryInterval(ex, timeoutHelper.RemainingTime(), ++retryCount);
                        if (retryInterval != null && !EventHubClient.CloseCalled)
                        {
                            await Task.Delay(retryInterval.Value).ConfigureAwait(false);

                            shouldRetry = true;
                        }
                        else
                        {
                            throw;
                        }
                    }
                }
            } while (shouldRetry);
        }
        protected override async Task <IList <EventData> > OnReceiveAsync(int maxMessageCount, TimeSpan waitTime)
        {
            bool shouldRetry;
            int  retryCount = 0;

            var timeoutHelper = new TimeoutHelper(waitTime, true);

            do
            {
                shouldRetry = false;

                try
                {
                    try
                    {
                        // Always use default timeout for AMQP sesssion.
                        ReceivingAmqpLink receiveLink =
                            await ReceiveLinkManager.GetOrCreateAsync(
                                TimeSpan.FromSeconds(AmqpClientConstants.AmqpSessionTimeoutInSeconds)).ConfigureAwait(false);

                        IEnumerable <AmqpMessage> amqpMessages = null;
                        bool hasMessages = await Task.Factory.FromAsync(
                            (c, s) => receiveLink.BeginReceiveMessages(maxMessageCount, timeoutHelper.RemainingTime(), c, s),
                            a => receiveLink.EndReceiveMessages(a, out amqpMessages),
                            this).ConfigureAwait(false);

                        if (receiveLink.TerminalException != null)
                        {
                            throw receiveLink.TerminalException;
                        }

                        if (hasMessages && amqpMessages != null)
                        {
                            IList <EventData> eventDatas = null;
                            foreach (AmqpMessage amqpMessage in amqpMessages)
                            {
                                if (eventDatas == null)
                                {
                                    eventDatas = new List <EventData>();
                                }

                                receiveLink.DisposeDelivery(amqpMessage, true, AmqpConstants.AcceptedOutcome);
                                eventDatas.Add(AmqpMessageConverter.AmqpMessageToEventData(amqpMessage));
                            }

                            return(eventDatas);
                        }
                    }
                    catch (AmqpException amqpException)
                    {
                        throw AmqpExceptionHelper.ToMessagingContract(amqpException.Error);
                    }
                }
                catch (Exception ex)
                {
                    // Evaluate retry condition?
                    TimeSpan?retryInterval = RetryPolicy.GetNextRetryInterval(ex, timeoutHelper.RemainingTime(), ++retryCount);
                    if (retryInterval != null && !EventHubClient.CloseCalled)
                    {
                        await Task.Delay(retryInterval.Value).ConfigureAwait(false);

                        shouldRetry = true;
                    }
                    else
                    {
                        // Handle EventHubsTimeoutException explicitly.
                        // We don't really want to to throw EventHubsTimeoutException on this call.
                        if (ex is EventHubsTimeoutException)
                        {
                            break;
                        }

                        throw;
                    }
                }
            } while (shouldRetry);

            // No messages to deliver.
            return(null);
        }