public void ReceiveMessages(Func <IssueCreatedEventArgs, CancellationToken, Task> issueCreatedHandler = null,
Func <NewIssueCreatedEventArgs, CancellationToken, Task> newissueCreatedHandler = null,
MessageHandlerOptions options = null)
{
var messageHandlerOptions = options ?? new MessageHandlerOptions(OnDefaultError);
_messageReceiver.RegisterMessageHandler(async(msg, token) =>
{
_logger.Information("Received service bus message {MessageId}: {Label}", msg.Id.ToString(), msg.Label);
switch (msg.Label)
{
case IssueMessageSender.ISSUE_CREATED:
{
if (issueCreatedHandler != null)
{
_logger.Information("ISSUE_CREATED");
await ReceiveIssueCreated(msg, token, issueCreatedHandler);
}
else
{
await _messageReceiver.CompleteAsync(msg.LockToken);
}
break;
}
default:
{
await _messageReceiver.DeadLetterAsync(msg.LockToken, $"Unknown message type: { msg.Label }");
break;
}
}
}, messageHandlerOptions);
}
internal async Task OnMessageAsyncUnregisterHandlerShortTimeoutTestCase(
IMessageSender messageSender,
IMessageReceiver messageReceiver,
int maxConcurrentCalls,
bool autoComplete,
int messageCount)
{
var count = 0;
await TestUtility.SendMessagesAsync(messageSender, messageCount);
messageReceiver.RegisterMessageHandler(
async(message, token) =>
{
TestUtility.Log($"Received message: SequenceNumber: {message.SystemProperties.SequenceNumber}");
await Task.Delay(TimeSpan.FromSeconds(8));
if (messageReceiver.ReceiveMode == ReceiveMode.PeekLock && !autoComplete)
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
Interlocked.Increment(ref count);
},
new MessageHandlerOptions(ExceptionReceivedHandler)
{
MaxConcurrentCalls = maxConcurrentCalls, AutoComplete = autoComplete
});
await Task.Delay(TimeSpan.FromSeconds(2));
await messageReceiver.UnregisterMessageHandlerAsync(TimeSpan.FromSeconds(2));
Assert.True(count == 0);
}
static async Task ReceiveMessagesAsync(int numberOfMessagesToReceive, ILogger tw)
{
// Receive the message
IList <Message> receiveList = await messageReceiver.ReceiveAsync(numberOfMessagesToReceive);
foreach (Message msg in receiveList)
{
tw.LogInformation($"Received message: SequenceNumber:{msg.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(msg.Body)}");
await messageReceiver.CompleteAsync(msg.SystemProperties.LockToken);
}
}
static async Task ProcessMessagesAsyncDead(Message receivedMessage, CancellationToken token)
{
try
{
ProcessMessage(receivedMessage, "dead-letter");
await subscriptionDeadLetter.CompleteAsync(receivedMessage.SystemProperties.LockToken);
}
catch (Exception)
{
await subscriptionDeadLetter.AbandonAsync(receivedMessage.SystemProperties.LockToken);
}
}
protected override void ReceiveEvent(IMessageReceiver client, BrokeredMessage message)
#endif
{
try
{
Logger.LogDebug(string.Format("An event message arrived with the id '{0}'.", message.MessageId));
string messageBody = message.GetBodyAsString();
IEvent <TAuthenticationToken> @event = MessageSerialiser.DeserialiseEvent(messageBody);
CorrelationIdHelper.SetCorrelationId(@event.CorrelationId);
Logger.LogInfo(string.Format("An event message arrived with the id '{0}' was of type {1}.", message.MessageId, @event.GetType().FullName));
Type eventType = @event.GetType();
string targetQueueName = eventType.FullName;
try
{
object rsn = eventType.GetProperty("Rsn").GetValue(@event, null);
targetQueueName = string.Format("{0}.{1}", targetQueueName, rsn);
}
catch
{
Logger.LogDebug(string.Format("An event message arrived with the id '{0}' was of type {1} but with no Rsn property.", message.MessageId, eventType));
// Do nothing if there is no rsn. Just use @event type name
}
CreateQueueAndAttachListenerIfNotExist(targetQueueName);
EnqueueEvent(targetQueueName, @event);
// remove the original message from the incoming queue
#if NET452
message.Complete();
#endif
#if NETSTANDARD2_0
client.CompleteAsync(message.SystemProperties.LockToken).Wait(1500);
#endif
Logger.LogDebug(string.Format("An event message arrived and was processed with the id '{0}'.", message.MessageId));
}
catch (Exception exception)
{
// Indicates a problem, unlock message in queue
Logger.LogError(string.Format("An event message arrived with the id '{0}' but failed to be process.", message.MessageId), exception: exception);
#if NET452
message.Abandon();
#endif
#if NETSTANDARD2_0
client.AbandonAsync(message.SystemProperties.LockToken).Wait(1500);
#endif
}
}
static async Task ReceiveMessagesAsync(int numberOfMessagesToReceive)
{
while (numberOfMessagesToReceive-- > 0)
{
// Receive the message
Message message = await messageReceiver.ReceiveAsync();
// Process the message
Console.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
// Complete the message so that it is not received again.
// This can be done only if the MessageReceiver is created in ReceiveMode.PeekLock mode (which is default).
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
}
async Task CompleteMessageIfNeededAsync(Message message)
{
try
{
if (_messageReceiver.ReceiveMode == ReceiveMode.PeekLock &&
_registerHandlerOptions.AutoComplete)
{
await _messageReceiver.CompleteAsync(new[] { message.SystemProperties.LockToken }).ConfigureAwait(false);
}
}
catch (Exception exception)
{
await RaiseExceptionReceived(exception, ExceptionReceivedEventArgsAction.Complete).ConfigureAwait(false);
}
}
private static async Task HandleMessage(Message message, CancellationToken token)
{
try
{
bool isDeadLetterMessage = message.UserProperties.Keys.FirstOrDefault(k => k.Equals("DeadLetterReason")) != null;
bool hasSessionId = !string.IsNullOrEmpty(message.SessionId);
Console.WriteLine("Message Received!");
var smsMessage = JsonConvert.DeserializeObject <SmsMessage>(Encoding.UTF8.GetString(message.Body));
Console.WriteLine("Content: " + smsMessage.Content);
Console.WriteLine("Destination: " + smsMessage.Destination);
Console.WriteLine("Is DLQ: " + isDeadLetterMessage);
// Writing messages with not null sessionId's to session disabled queues is not forbidden.
// In fact, if you write messages with sessionId to a queue where sessions are disabled,
// you will still get messages FIFO.
Console.WriteLine("Has session ID: " + hasSessionId);
if (hasSessionId)
{
Console.WriteLine("Session ID: " + message.SessionId);
}
// Complete the message so that it is not received again.
// This can be done only if the queue Client is created in ReceiveMode.PeekLock mode (which is the default).
if (isDeadLetterMessage)
{
await _dlqReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
else
{
await _queueClient.CompleteAsync(message.SystemProperties.LockToken);
}
Console.WriteLine("***********************\n");
}
catch
{
Console.WriteLine("Received exception while handling the message, abandoning...");
await _queueClient.AbandonAsync(message.SystemProperties.LockToken);
}
}
private async Task ProcessMessagesAsync(Message message, CancellationToken token)
{
T payload = null;
if (message.Body[0] == charAt)
{
payload = OneSolution.ServiceBus.XmlMessageExtention.ParseXmlMessage <T>(message);
}
else
{
payload = JsonSerializer.Deserialize <T>(Encoding.UTF8.GetString(message.Body));
}
var lockToken = message.SystemProperties.LockToken;
await processor.ProcessMessagesAsync(payload, lockToken, token).ConfigureAwait(false);
await receiver.CompleteAsync(lockToken).ConfigureAwait(false);
}
internal static async Task <Message> GetDeferredMessageAsync(this IMessageReceiver messageReceiver, Message message)
{
if (!message.TryGetDeferredSequenceNumber(out var sequenceNumber))
{
return(message);
}
using (var scope = new TransactionScope(TransactionScopeAsyncFlowOption.Enabled))
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken).ConfigureAwait(false);
message = await messageReceiver.ReceiveDeferredMessageAsync(sequenceNumber)
.ConfigureAwait(false);
scope.Complete();
}
return(message);
}
/// <summary>
/// Processes an incoming message.
/// </summary>
/// <param name="receiver"></param>
/// <param name="message"></param>
/// <returns></returns>
private async Task ProcessMessageForClient(IMessageReceiver receiver, Message message)
{
SampleMessage messageData = null;
try
{
messageData = DeserializeMessage(message);
}
catch (Exception ex)
{
//this is an issue, we received data that cannot be interpreted as MessageData.
await MessageProcessingFailed(message, ex).ConfigureAwait(false);
//move to dlc
if (message.SystemProperties.IsReceived)
{
await receiver.DeadLetterAsync(message.SystemProperties.LockToken, "Message cannot be deserialized into MessageData.").ConfigureAwait(false);
}
}
try
{
//if messageData is null, this means message is not supposed to be handled
if (messageData != null)
{
await ProcessMessage(receiver, message, messageData)
.ConfigureAwait(false);
}
else
{
//unable to process, and not interested
await receiver.CompleteAsync(message.SystemProperties.LockToken).ConfigureAwait(false);
}
}
catch (MessageLockLostException ex)
{
_logger?.LogWarning(ex, "Message lock was lost for message {MessageId}", message.MessageId);
}
catch (Exception ex)
{
await MessageProcessingFailed(message, ex).ConfigureAwait(false);
}
}
private async Task HandleMessage(Message message, CancellationToken cancellationToken)
{
//Console.WriteLine($"Handled message id {message.MessageId}, diagnostic id {message.UserProperties["Diagnostic-Id"]}, enclosed type {message.UserProperties["EnclosedType"]}");
try
{
await messageHandler.HandleMessage(message, cancellationToken);
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
catch (Exception ex)
{
Dictionary <string, object> abandonReasons = new Dictionary <string, object>
{
{ "Exception.Message", ex.Message },
{ "Exception.StackTrace", ex.ToString() }
};
await messageReceiver.AbandonAsync(message.SystemProperties.LockToken, abandonReasons);
}
}
private async Task _handleMessage(RecoverabilityContext context, CancellationToken cancellationToken)
{
bool isHandled = false;
try
{
context = await _recoverability.OnPreHandle(context);
if (context.SkipMessage)
{
return;
}
await _handleMessageFunc(
new TransportMessage(context.Message.Label, context.Message.Body, _metaDataMapper.ExtractMetaData(context.Message)),
_endpoint
);
isHandled = true;
}
catch (NonTransientException nte)
{
_logger.LogError(nte, "AzureServiceBusMessagePump encountered a NonTransient Exception handling a message. Sending to DLQ. Endpoint: {EndpointName}", context.Endpoint.Name);
await _receiver.DeadLetterAsync(context.Message.SystemProperties.LockToken);
}
catch (Exception exc)
{
//backoff retry
_logger.LogError(exc, "AzureServiceBusMessagePump encountered an exception handling a message. Attempting to recover. Endpoint: {EndpointName}. Label: {messageLabel}", context.Endpoint.Name, context.Message?.Label);
await _recoverability.Recover(context);
}
//if an exception occurs completing the message then it will stay on the queue and be handled again
//we don't want to trigger recoverability/retry
if (isHandled)
{
await _completeImmediateRetryPolicy.ExecuteAsync(() =>
_receiver.CompleteAsync(context.Message.SystemProperties.LockToken)
);
await _recoverability.OnPostHandle(context);
}
}
internal async Task OnMessageAsyncTestCase(
IMessageSender messageSender,
IMessageReceiver messageReceiver,
int maxConcurrentCalls,
bool autoComplete,
int messageCount)
{
int count = 0;
await TestUtility.SendMessagesAsync(messageSender, messageCount);
messageReceiver.RegisterMessageHandler(
async(message, token) =>
{
TestUtility.Log($"Received message: SequenceNumber: {message.SystemProperties.SequenceNumber}");
count++;
if (messageReceiver.ReceiveMode == ReceiveMode.PeekLock && !autoComplete)
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
},
new MessageHandlerOptions(ExceptionReceivedHandler)
{
MaxConcurrentCalls = maxConcurrentCalls, AutoComplete = autoComplete
});
// Wait for the OnMessage Tasks to finish
Stopwatch stopwatch = Stopwatch.StartNew();
while (stopwatch.Elapsed.TotalSeconds <= 60)
{
if (count == messageCount)
{
TestUtility.Log($"All '{messageCount}' messages Received.");
break;
}
else
{
await Task.Delay(TimeSpan.FromSeconds(5));
}
}
Assert.True(count == messageCount);
}
public async Task <bool> ResubmitDeadLetterMessageAsync(string messageId, string serviceBusQueue, long sequenceNumber)
{
bool IsSuccess = false;
IMessageReceiver messageReceiver = _messageReceiverFactory.Create(serviceBusQueue, ReceiveMode.PeekLock, true);
Message deadLetter = await messageReceiver.PeekBySequenceNumberAsync(sequenceNumber);
if (deadLetter != null)
{
var newMessage = _messageReader.ReadMessage(Encoding.UTF8.GetString(deadLetter.Body));
//Check that the messageId matches the one that we want to re-enqueue
if (newMessage.MessageId.Equals(messageId))
{
try
{
//Attempt to send the message back onto the queue
// never re-queue a message with a duplicate id - it will fail to save to message archive
newMessage.MessageId = Guid.NewGuid().ToString();
await _messageSender.SendMessage(newMessage);
}
catch (Exception ex)
{
_log.LogError(ex, "ResubmitDeadLetterMessageAsync Exception");
throw new ServiceBusReaderException("ResubmitDeadLetterMessageAsync", ex);
}
finally
{
//Delete message after resubmitting
var msg = await messageReceiver.ReceiveAsync();
await messageReceiver.CompleteAsync(msg.SystemProperties.LockToken);
IsSuccess = true;
}
}
}
await messageReceiver.CloseAsync();
return(IsSuccess);
}
public async Task ReceiveMessageAsync(IMessageReceiver receiver, Message message, CancellationToken cancellationToken)
{
Exception receiveEx = null;
try
{
cancellationToken.ThrowIfCancellationRequested();
Console.WriteLine("Received MessageId=[{0}] MessageBody=[{1}]", message.MessageId, Encoding.UTF8.GetString(message.Body));
await receiver.CompleteAsync(message.SystemProperties.LockToken);
}
catch (Exception ex)
{
receiveEx = ex;
Console.WriteLine("Exception ocurred during ReceiveMessageAsync() Message=[{0}]", ex.Message);
}
if (receiveEx != null)
{
await receiver.AbandonAsync(message.SystemProperties.LockToken);
}
}
protected async Task <bool> HandleMessageOutcome(
Message message,
MessageHandlingResult result)
{
var isSuccessful = result.Result == MessageHandlingResult.HandlingResult.Completed;
var shouldAutoComplete = _endpointHandlingConfig.AutoComplete || _receiver.IsClosedOrClosing;
if (shouldAutoComplete)
{
return(isSuccessful);
}
try
{
switch (result.Result)
{
case MessageHandlingResult.HandlingResult.Completed:
await _receiver.CompleteAsync(message.SystemProperties.LockToken).ConfigureAwait(false);
break;
case MessageHandlingResult.HandlingResult.DeadLettered:
case MessageHandlingResult.HandlingResult.UnrecognisedMessageType:
await _receiver.DeadLetterAsync(message.SystemProperties.LockToken, result.AdditionalProperties).ConfigureAwait(false);
break;
case MessageHandlingResult.HandlingResult.Abandoned:
await _receiver.AbandonAsync(message.SystemProperties.LockToken, result.AdditionalProperties).ConfigureAwait(false);
break;
}
}
catch (MessageLockLostException ex)
{
_logger.LogError(LogEventIds.ListenerException, ex, $"MessageLockLostException in {_name}>");
}
return(isSuccessful);
}
static async Task ProcessDeadLetterQueueMessagesAsync(Message message, CancellationToken token)
{
// Process the message
// This could include retries or logging for further troubleshooting
Console.WriteLine($"Received DLQ message: SequenceNumber:{message.SystemProperties} Body:{Encoding.UTF8.GetString(message.Body)}");
if (message.UserProperties.ContainsKey("DeadLetterReason"))
{
Console.WriteLine("\t DeadLetterReason: {0}", message.UserProperties["DeadLetterReason"]);
}
if (message.UserProperties.ContainsKey("DeadLetterErrorDescription"))
{
Console.WriteLine("\t DeadLetterErrorDescription: {0}", message.UserProperties["DeadLetterErrorDescription"]);
}
// Complete the message so that it is not received again.
// This can be done only if the deadLetterReceiver is created in ReceiveMode.PeekLock mode (which is default).
await deadLetterReceiver.CompleteAsync(message.SystemProperties.LockToken);
// Note: Use the cancellationToken passed as necessary to determine if the deadLetterReceiver has already been closed.
// If deadLetterReceiver has already been Closed, you may chose to not call CompleteAsync() or AbandonAsync() etc. calls
// to avoid unnecessary exceptions.
}
/// <summary>
/// Handles one message.
/// </summary>
/// <param name="receiver"></param>
/// <param name="serviceBusMessage"></param>
/// <param name="messageData"></param>
/// <returns></returns>
private async Task ProcessMessage(IMessageReceiver receiver, Message serviceBusMessage, SampleMessage messageData)
{
//TODO: de-duplicate messages
ImmutableList <SampleMessage> value;
if (_cache.TryGetValue("CacheKey", out var val))
{
value = (ImmutableList <SampleMessage>)val;
}
else
{
value = ImmutableList <SampleMessage> .Empty;
}
messageData.Receiver = receiver == _primaryMessageReceiver ? "PrimaryReceiver" : "SecondaryReceiver";
value = value.Add(messageData);
_cache.Set("CacheKey", value);
_logger.LogInformation("Received message with body: {MessageData}", messageData);
await receiver.CompleteAsync(serviceBusMessage.SystemProperties.LockToken).ConfigureAwait(false);
}
private async Task <IList <QueueMessage> > ProcessMessagesInTransaction(string queueName, int quantity)
{
IEnumerable <QueueMessage> formattedMessages = new List <QueueMessage>();
var messages = await _messageReceiver.ReceiveAsync(quantity, TimeSpan.FromSeconds(60));
try
{
if (messages == null)
{
return(null);
}
formattedMessages = messages.Select(message => message.Convert(_userService.GetUserId(), queueName));
await AddMessagesToDatabase(formattedMessages);
await _messageReceiver.CompleteAsync(messages.Select(message => message.GetLockToken()));
}
catch (CosmosBatchInsertException ex)
{
await HandleBatchCreationFailure(formattedMessages, ex.StatusCode);
_logger.LogError("Failed to create messages with error: {0}, exception: {1}", ex.StatusCode.ToString(),
ex.ToString());
}
catch (Exception ex)
{
_logger.LogError("Failed to receive messages: {0}", ex.ToString());
foreach (var message in formattedMessages)
{
await _messageReceiver.AbandonAsync(message.OriginalMessage.GetLockToken());
}
}
return(formattedMessages.ToList());
}
static async Task ReceiveMessagesAsync(int numberOfMessagesToReceive, TraceWriter tw)
{
//while (numberOfMessagesToReceive-- > 0)
//{
// Receive the message
IList <Message> receiveList = await messageReceiver.ReceiveAsync(numberOfMessagesToReceive);
foreach (Message msg in receiveList)
{
MemoryStream stream = new MemoryStream(msg.Body);
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(TheMsgBody));
var body = (TheMsgBody)ser.ReadObject(stream);
Message NewMessage = new Message();
NewMessage.Body = msg.Body;
NewMessage.MessageId = msg.MessageId;
// Process the message
if (body.SalesValue > 9999)
{
tw.Info("AWESOME - Big sales incoming!");
}
else
{
tw.Info($"Regular sales incoming...");
}
NewMessage.UserProperties.Add("SalesValue", body.SalesValue);
await messageSender.SendAsync(NewMessage);
await messageReceiver.CompleteAsync(msg.SystemProperties.LockToken);
}
// Complete the message so that it is not received again.
// This can be done only if the MessageReceiver is created in ReceiveMode.PeekLock mode (which is default).
//}
}
public async Task Complete(string lockToken)
{
await _messageReceiver.CompleteAsync(lockToken).ConfigureAwait(false);
}
/// <summary>
/// dispatch message by its label
/// </summary>
/// <param name="message"></param>
/// <param name="receiver"></param>
/// <returns></returns>
private async Task DispatchMessage(Message message, IMessageReceiver receiver)
{
if (message.Label == null || !setting.messageHandlers.ContainsKey(message.Label))
{
// don't have to wait the call
/*await*/
receiver.AbandonAsync(message.SystemProperties.LockToken);
return;
}
var handlers = setting.messageHandlers[message.Label];
if (handlers.Count == 0)
{
// don't have to wait the call
/*await*/
receiver.CompleteAsync(message.SystemProperties.LockToken);
return;
}
try
{
var hId = -1;
var pack = new HandlerPack();
pack.stationId = stationId;
pack.receiver = receiver;
pack.message = message;
pack.terminate = () =>
{
hId = handlers.Count;
};
pack.next = async() =>
{
hId++;
if (hId < handlers.Count)
{
var handler = handlers[hId];
await handler.Invoke(pack);
}
};
// start handler function chain
while (hId < handlers.Count)
{
try
{
await pack.next();
}
catch (System.Exception e)
{
Console.WriteLine("============");
Console.WriteLine(e.ToString());
receiver.DeadLetterAsync(message.SystemProperties.LockToken);
break;
}
}
return;
}
catch (System.Exception e)
{
Console.WriteLine(e.ToString());
}
// for any uncatched exception
try
{
receiver.AbandonAsync(message.SystemProperties.LockToken);
}
catch (System.Exception e)
{
throw;
}
}
internal void StartMessageBatchReceiver(CancellationToken cancellationToken)
{
SessionClient sessionClient = null;
IMessageReceiver receiver = null;
if (_isSessionsEnabled)
{
sessionClient = _sessionClient.Value;
}
else
{
receiver = Receiver;
}
Task.Run(async() =>
{
while (true)
{
try
{
if (!_started || cancellationToken.IsCancellationRequested)
{
_logger.LogInformation("Message processing has been stopped or cancelled");
return;
}
if (_isSessionsEnabled && (receiver == null || receiver.IsClosedOrClosing))
{
try
{
receiver = await sessionClient.AcceptMessageSessionAsync();
receiver.PrefetchCount = _serviceBusOptions.PrefetchCount;
}
catch (ServiceBusTimeoutException)
{
// it's expected if the entity is empty, try next time
continue;
}
}
IList <Message> messages = await receiver.ReceiveAsync(_serviceBusOptions.BatchOptions.MaxMessageCount, _serviceBusOptions.BatchOptions.OperationTimeout);
if (messages != null)
{
Message[] messagesArray = messages.ToArray();
ServiceBusTriggerInput input = ServiceBusTriggerInput.CreateBatch(messagesArray);
input.MessageReceiver = receiver;
FunctionResult result = await _triggerExecutor.TryExecuteAsync(input.GetTriggerFunctionData(), cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
return;
}
// Complete batch of messages only if the execution was successful
if (_serviceBusOptions.BatchOptions.AutoComplete && _started)
{
if (result.Succeeded)
{
await receiver.CompleteAsync(messagesArray.Select(x => x.SystemProperties.LockToken));
}
else
{
List <Task> abandonTasks = new List <Task>();
foreach (var lockTocken in messagesArray.Select(x => x.SystemProperties.LockToken))
{
abandonTasks.Add(receiver.AbandonAsync(lockTocken));
}
await Task.WhenAll(abandonTasks);
}
}
}
else
{
// Close the session and release the session lock after draining all messages for the accepted session.
if (_isSessionsEnabled)
{
await receiver.CloseAsync();
}
}
}
catch (ObjectDisposedException)
{
// Ignore as we are stopping the host
}
catch (Exception ex)
{
// Log another exception
_logger.LogError($"An unhandled exception occurred in the message batch receive loop", ex);
if (_isSessionsEnabled && receiver != null)
{
// Attempt to close the session and release session lock to accept a new session on the next loop iteration
try
{
await receiver.CloseAsync();
}
catch
{
// Best effort
receiver = null;
}
}
}
}
}, cancellationToken);
}
internal void StartMessageBatchReceiver(CancellationToken cancellationToken)
{
SessionClient sessionClient = null;
IMessageReceiver receiver = null;
if (_isSessionsEnabled)
{
sessionClient = _messagingProvider.CreateSessionClient(_entityPath, _serviceBusAccount.ConnectionString);
}
else
{
receiver = Receiver;
}
Task.Run(async() =>
{
while (true)
{
try
{
if (!_started || cancellationToken.IsCancellationRequested)
{
return;
}
if (_isSessionsEnabled)
{
try
{
receiver = await sessionClient.AcceptMessageSessionAsync();
}
catch (ServiceBusTimeoutException)
{
// it's expected if the entity is empty, try next time
continue;
}
}
IList <Message> messages = await receiver.ReceiveAsync(_serviceBusOptions.BatchOptions.MaxMessageCount, _serviceBusOptions.BatchOptions.OperationTimeout);
if (messages != null)
{
Message[] messagesArray = messages.ToArray();
ServiceBusTriggerInput input = ServiceBusTriggerInput.CreateBatch(messagesArray);
input.MessageReceiver = receiver;
FunctionResult result = await _triggerExecutor.TryExecuteAsync(input.GetTriggerFunctionData(), cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
return;
}
// Complete batch of messages only if the execution was successful
if (_serviceBusOptions.BatchOptions.AutoComplete && _started)
{
if (result.Succeeded)
{
await receiver.CompleteAsync(messagesArray.Select(x => x.SystemProperties.LockToken));
}
else
{
// Delivery count is not incremented if
// Session is accepted, the messages within the session are not completed (even if they are locked), and the session is closed
// https://docs.microsoft.com/en-us/azure/service-bus-messaging/message-sessions#impact-of-delivery-count
if (_isSessionsEnabled)
{
List <Task> abandonTasks = new List <Task>();
foreach (var lockTocken in messagesArray.Select(x => x.SystemProperties.LockToken))
{
abandonTasks.Add(receiver.AbandonAsync(lockTocken));
}
await Task.WhenAll(abandonTasks);
}
}
}
// Close the session and release the session lock
if (_isSessionsEnabled)
{
await receiver.CloseAsync();
}
}
}
catch (ObjectDisposedException)
{
// Ignore as we are stopping the host
}
catch (Exception ex)
{
// Log another exception
_logger.LogError($"An unhandled exception occurred in the message batch receive loop: {ex.ToString()}");
}
}
}, cancellationToken);
}
public void Start(QueueReaderSettings config, ActiveQueueContext context)
{
_receiver = new MessageReceiver(
new ServiceBusConnection(config.ConnectionString),
config.QueueName,
prefetchCount: PrefetchCount
);
_receiverTokenSource = new CancellationTokenSource();
var completeTime = DateTime.UtcNow;
_receiverTask = Task.Run(async() => {
while (!_receiverTokenSource.IsCancellationRequested)
{
var receiveTime = DateTime.UtcNow;
context.OnMeasure("AzureCTime", (receiveTime - completeTime).TotalMilliseconds);
IList <Message> messages;
try
{
messages = await _receiver.ReceiveAsync(MaxMessageCount);
if (messages == null || messages.Count == 0)
{
continue;
}
}
catch (Exception ex)
{
context.OnError($"AzureActiveQueue - exception received: {ex}");
try
{
await Task.Delay(TimeoutOnException, _receiverTokenSource.Token);
}
catch (OperationCanceledException)
{
// ignore
}
continue;
}
var processTime = DateTime.UtcNow;
context.OnMeasure("AzureRTime", (processTime - receiveTime).TotalMilliseconds);
context.OnMeasure("AzureBSize", messages.Count);
var lockTokens = messages.Select(x => x.SystemProperties.LockToken);
var completeMessagesTask = _receiver.CompleteAsync(lockTokens);
foreach (var message in messages)
{
Event msg = null;
try
{
msg = Event.Parser.ParseFrom(message.Body);
}
catch (Exception)
{
// ToDo: remove temporal fallback
try
{
var buf = message.GetBody <byte[]>();
msg = Event.Parser.ParseFrom(buf);
}
catch (Exception ex)
{
context.OnError($"AzureActiveQueue - not able to handle message: {ex}");
}
if (msg != null)
{
var curDate = DateTime.UtcNow;
var name = $"{msg.Source}::{msg.Instance}";
if (!_fallbacks.TryGetValue(name, out var date) || (curDate - date).TotalMinutes > 30)
{
context.OnVerbose($"[AzureActiveQueue] {name} used obsolete xml serialized Event");
_fallbacks[name] = curDate;
}
}
}
if (msg != null)
{
context.OnReceivedMessage(msg);
}
}
completeTime = DateTime.UtcNow;
context.OnMeasure("AzurePTime", (completeTime - processTime).TotalMilliseconds);
try
{
await completeMessagesTask;
}
catch (Exception ex)
{
context.OnError($"Failed to complete messages: {ex}");
}
}
});
}
internal async Task OnMessageAsyncUnregisterHandlerShortTimeoutTestCase(
IMessageSender messageSender,
IMessageReceiver messageReceiver,
int maxConcurrentCalls,
bool autoComplete,
int messageCount)
{
var count = 0;
await TestUtility.SendMessagesAsync(messageSender, messageCount);
messageReceiver.RegisterMessageHandler(
async(message, token) =>
{
TestUtility.Log($"Received message: SequenceNumber: {message.SystemProperties.SequenceNumber}");
await Task.Delay(TimeSpan.FromSeconds(8));
if (messageReceiver.ReceiveMode == ReceiveMode.PeekLock && !autoComplete)
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
Interlocked.Increment(ref count);
},
new MessageHandlerOptions(ExceptionReceivedHandler)
{
MaxConcurrentCalls = maxConcurrentCalls, AutoComplete = autoComplete
});
await messageReceiver.UnregisterMessageHandlerAsync(TimeSpan.FromSeconds(2));
Assert.True(count == 0);
// Reregister won't have any problems
count = 0;
var remainingMessageCount = messageCount - maxConcurrentCalls;
messageReceiver.RegisterMessageHandler(
async(message, token) =>
{
TestUtility.Log($"Received message: SequenceNumber: {message.SystemProperties.SequenceNumber}");
if (messageReceiver.ReceiveMode == ReceiveMode.PeekLock && !autoComplete)
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
Interlocked.Increment(ref count);
},
new MessageHandlerOptions(ExceptionReceivedHandler)
{
MaxConcurrentCalls = maxConcurrentCalls, AutoComplete = autoComplete
});
var stopwatch = Stopwatch.StartNew();
while (stopwatch.Elapsed.TotalSeconds <= 60)
{
if (count == remainingMessageCount)
{
TestUtility.Log($"All '{remainingMessageCount}' messages Received.");
break;
}
await Task.Delay(TimeSpan.FromSeconds(5));
}
Assert.True(count == remainingMessageCount);
}
public void Complete(string lockToken)
{
_messageReceiver.CompleteAsync(lockToken).Wait();
}
internal static async Task CompleteMessagesAsync(IMessageReceiver messageReceiver, IList <Message> messages)
{
await messageReceiver.CompleteAsync(messages.Select(message => message.SystemProperties.LockToken));
Log($"Completed {messages.Count} messages");
}
public override Task CompleteAsync(
IQueueMessage message,
CancellationToken cancellationToken = default(CancellationToken))
{
return(_messageReceiver.CompleteAsync(message.LeaseId));
}