public bool TakeMessage(CancellationToken token, out MessageTransportContext context)
{
while (!token.IsCancellationRequested)
{
for (var i = 0; i < _readers.Length; i++)
{
var queue = _readers[i];
var message = queue.TryGetMessage();
switch (message.State)
{
case GetEnvelopeResultState.Success:
_emptyCycles = 0;
context = message.Message;
return true;
case GetEnvelopeResultState.Empty:
_emptyCycles += 1;
break;
case GetEnvelopeResultState.Exception:
// access problem, fall back a bit
break;
case GetEnvelopeResultState.Retry:
// this could be the poison
break;
default:
throw new ArgumentOutOfRangeException();
}
var waiting = _waiter(_emptyCycles);
token.WaitHandle.WaitOne(waiting);
}
}
context = null;
return false;
}
/// <summary>
/// ACKs the message by deleting it from the queue.
/// </summary>
/// <param name="message">The message context to ACK.</param>
public void AckMessage(MessageTransportContext message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
_queue.DeleteMessage((CloudQueueMessage)message.TransportMessage);
}
/// <summary>
/// ACKs the message by deleting it from the queue.
/// </summary>
/// <param name="message">The message context to ACK.</param>
public void AckMessage(MessageTransportContext message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
((FileInfo)message.TransportMessage).Delete();
}
public void AckMessage(MessageTransportContext message)
{
foreach (var queue in _readers)
{
if (queue.Name == message.QueueName)
{
queue.AckMessage(message);
}
}
}
public void AckMessage(MessageTransportContext message)
{
foreach (var queue in _readers)
{
if (queue.Name == message.QueueName)
{
queue.AckMessage(message);
}
}
}
public void AckMessage(MessageTransportContext message)
{
if (message == null) throw new ArgumentNullException("message");
foreach (var queue in _readers)
{
if (queue.Name == message.QueueName)
{
queue.AckMessage(message);
}
}
}
public void AckMessage(MessageTransportContext message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
foreach (var queue in _readers)
{
if (queue.Name == message.QueueName)
{
queue.AckMessage(message);
}
}
}
public bool TakeMessage(CancellationToken token, out MessageTransportContext context)
{
while (!token.IsCancellationRequested)
{
// if incoming message is delayed and in future -> push it to the timer queue.
// timer will be responsible for publishing back.
byte[] envelope;
var result = BlockingCollection<byte[]>.TakeFromAny(_queues, out envelope);
if (result >= 0)
{
context = new MessageTransportContext(result, envelope, _names[result]);
return true;
}
}
context = null;
return false;
}
public GetEnvelopeResult TryGetMessage()
{
FileInfo message;
try
{
message = _queue.EnumerateFiles().FirstOrDefault();
}
catch (Exception ex)
{
SystemObserver.Notify(new FailedToReadMessage(ex, _queueName));
return(GetEnvelopeResult.Error());
}
if (null == message)
{
return(GetEnvelopeResult.Empty);
}
try
{
var buffer = File.ReadAllBytes(message.FullName);
var unpacked = new MessageTransportContext(message, buffer, _queueName);
return(GetEnvelopeResult.Success(unpacked));
}
catch (IOException ex)
{
// this is probably sharing violation, no need to
// scare people.
if (!IsSharingViolation(ex))
{
SystemObserver.Notify(new FailedToAccessStorage(ex, _queue.Name, message.Name));
}
return(GetEnvelopeResult.Retry);
}
catch (Exception ex)
{
SystemObserver.Notify(new MessageInboxFailed(ex, _queue.Name, message.FullName));
// new poison details
return(GetEnvelopeResult.Retry);
}
}
public bool TakeMessage(CancellationToken token, out MessageTransportContext context)
{
while (!token.IsCancellationRequested)
{
// if incoming message is delayed and in future -> push it to the timer queue.
// timer will be responsible for publishing back.
byte[] envelope;
var result = BlockingCollection <byte[]> .TakeFromAny(_queues, out envelope);
if (result >= 0)
{
context = new MessageTransportContext(result, envelope, _names[result]);
return(true);
}
}
context = null;
return(false);
}
public GetEnvelopeResult TryGetMessage()
{
FileInfo message;
try
{
message = _queue.EnumerateFiles().FirstOrDefault();
}
catch (Exception ex)
{
SystemObserver.Notify(new FailedToReadMessage(ex, _queueName));
return GetEnvelopeResult.Error();
}
if (null == message)
{
return GetEnvelopeResult.Empty;
}
try
{
var buffer = File.ReadAllBytes(message.FullName);
var unpacked = new MessageTransportContext(message, buffer, _queueName);
return GetEnvelopeResult.Success(unpacked);
}
catch (IOException ex)
{
// this is probably sharing violation, no need to
// scare people.
if (!IsSharingViolation(ex))
{
SystemObserver.Notify(new FailedToAccessStorage(ex, _queue.Name, message.Name));
}
return GetEnvelopeResult.Retry;
}
catch (Exception ex)
{
SystemObserver.Notify(new MessageInboxFailed(ex, _queue.Name, message.FullName));
// new poison details
return GetEnvelopeResult.Retry;
}
}
void ProcessMessage(MessageTransportContext context)
{
var dispatched = false;
try
{
_dispatcher(context.Unpacked);
dispatched = true;
}
catch (ThreadAbortException)
{
// we are shutting down. Stop immediately
return;
}
catch (Exception dispatchEx)
{
// if the code below fails, it will just cause everything to be reprocessed later,
// which is OK (duplication manager will handle this)
SystemObserver.Notify(new MessageDispatchFailed(context, context.QueueName, dispatchEx));
// quarantine is atomic with the processing
_inbox.TryNotifyNack(context);
}
if (!dispatched)
return;
try
{
_inbox.AckMessage(context);
// 3rd - notify.
SystemObserver.Notify(new MessageAcked(context));
}
catch (ThreadAbortException)
{
// nothing. We are going to sleep
}
catch (Exception ex)
{
// not a big deal. Message will be processed again.
SystemObserver.Notify(new MessageAckFailed(ex, context));
}
}
public bool TakeMessage(CancellationToken token, out MessageTransportContext context)
{
while (!token.IsCancellationRequested)
{
for (var i = 0; i < _readers.Length; i++)
{
var queue = _readers[i];
var message = queue.TryGetMessage();
switch (message.State)
{
case GetEnvelopeResultState.Success:
_emptyCycles = 0;
context = message.Message;
return(true);
case GetEnvelopeResultState.Empty:
_emptyCycles += 1;
break;
case GetEnvelopeResultState.Exception:
// access problem, fall back a bit
break;
case GetEnvelopeResultState.Retry:
// this could be the poison
break;
default:
throw new ArgumentOutOfRangeException();
}
var waiting = _waiter(_emptyCycles);
token.WaitHandle.WaitOne(waiting);
}
}
context = null;
return(false);
}
public void AckMessage(MessageTransportContext message)
{
}
public void TryNotifyNack(MessageTransportContext context)
{
}
public void TryNotifyNack(MessageTransportContext context)
{
}
/// <summary>
/// ACKs the message by deleting it from the queue.
/// </summary>
/// <param name="message">The message context to ACK.</param>
public void AckMessage(MessageTransportContext message)
{
if (message == null) throw new ArgumentNullException("message");
_queue.DeleteMessage((CloudQueueMessage) message.TransportMessage);
}
public DispatchRecoveryFailed(Exception exception, MessageTransportContext message, string queueName)
{
DispatchException = exception;
Message = message;
QueueName = queueName;
}
/// <summary>
/// ACKs the message by deleting it from the queue.
/// </summary>
/// <param name="message">The message context to ACK.</param>
public void AckMessage(MessageTransportContext message)
{
if (message == null) throw new ArgumentNullException("message");
((FileInfo) message.TransportMessage).Delete();
}
public void when_reader_ack_messages()
{
_queueWriter.PutMessage(Encoding.UTF8.GetBytes("message"));
var msg = _statelessReader.TryGetMessage();
var transportContext = new MessageTransportContext(
msg.Message.TransportMessage
, msg.Message.Unpacked
, msg.Message.QueueName);
_queueReader.AckMessage(transportContext);
var msg2 = _statelessReader.TryGetMessage();
Assert.AreEqual(GetEnvelopeResultState.Empty, msg2.State);
}
public MessageAckFailed(Exception exception, MessageTransportContext context)
{
Exception = exception;
Context = context;
}
public static GetEnvelopeResult Success(MessageTransportContext message)
{
return new GetEnvelopeResult(message, GetEnvelopeResultState.Success);
}
public void AckMessage(MessageTransportContext message)
{
}
public static GetEnvelopeResult Success(MessageTransportContext message)
{
return(new GetEnvelopeResult(message, GetEnvelopeResultState.Success));
}
GetEnvelopeResult(MessageTransportContext message, GetEnvelopeResultState state)
{
_message = message;
State = state;
}
public bool TakeMessage(CancellationToken token, out MessageTransportContext context)
{
context = new MessageTransportContext(null, new byte[0], "Name");
return false;
}
public void TryNotifyNack(MessageTransportContext context)
{
var id = (int)context.TransportMessage;
_queues[id].Add(context.Unpacked);
}
GetEnvelopeResult(MessageTransportContext message, GetEnvelopeResultState state)
{
_message = message;
State = state;
}
public MessageDispatchFailed(MessageTransportContext message, string queueName, Exception exception)
{
Exception = exception;
Message = message;
QueueName = queueName;
}
public MessageAcked(MessageTransportContext attributes)
{
Context = attributes;
}
public void TryNotifyNack(MessageTransportContext context)
{
var id = (int) context.TransportMessage;
_queues[id].Add(context.Unpacked);
}
