private async Task Deliver <TBusCommand>(TBusCommand busCommand, Type commandType, NimbusMessage nimbusMessage) where TBusCommand : IBusCommand
{
var queuePath = _router.Route(commandType, QueueOrTopic.Queue);
nimbusMessage.DestinedForQueue(queuePath);
var sw = Stopwatch.StartNew();
using (var scope = _dependencyResolver.CreateChildScope())
{
Exception exception;
var interceptors = _outboundInterceptorFactory.CreateInterceptors(scope, nimbusMessage);
try
{
_logger.LogDispatchAction("Sending", queuePath, sw.Elapsed);
var sender = _transport.GetQueueSender(queuePath);
foreach (var interceptor in interceptors)
{
await interceptor.OnCommandSending(busCommand, nimbusMessage);
}
await sender.Send(nimbusMessage);
foreach (var interceptor in interceptors.Reverse())
{
await interceptor.OnCommandSent(busCommand, nimbusMessage);
}
_logger.LogDispatchAction("Sent", queuePath, sw.Elapsed);
return;
}
catch (Exception exc)
{
exception = exc;
}
foreach (var interceptor in interceptors.Reverse())
{
await interceptor.OnCommandSendingError(busCommand, nimbusMessage, exception);
}
_logger.LogDispatchError("sending", queuePath, sw.Elapsed, exception);
}
}
public Task DeliverAfter(NimbusMessage message, DateTimeOffset deliveryTime)
{
_logger.Debug("Enqueuing {MessageId} for re-delivery at {DeliverAt}", message.MessageId, deliveryTime);
// Deliberately not awaiting this task. We want it to run in the background.
Task.Run(async() =>
{
var delay = deliveryTime.Subtract(_clock.UtcNow);
if (delay < TimeSpan.Zero)
{
delay = TimeSpan.Zero;
}
await Task.Delay(delay);
_logger.Debug("Re-delivering {MessageId} (attempt {Attempt})", message.MessageId, message.DeliveryAttempts.Length);
var sender = _transport.GetQueueSender(message.DeliverTo);
await sender.Send(message);
}).ConfigureAwaitFalse();
return(Task.Delay(0));
}
// ReSharper disable UnusedMember.Local
private async Task Dispatch <TBusRequest, TBusResponse>(TBusRequest busRequest, NimbusMessage nimbusMessage, Type handlerType)
where TBusRequest : IBusMulticastRequest <TBusRequest, TBusResponse>
where TBusResponse : IBusMulticastResponse
{
var replyQueueName = nimbusMessage.From;
var replyQueueClient = _transport.GetQueueSender(replyQueueName);
Exception exception = null;
using (var scope = _dependencyResolver.CreateChildScope())
{
var handler = (IHandleMulticastRequest <TBusRequest, TBusResponse>)scope.Resolve(handlerType);
_propertyInjector.Inject(handler, nimbusMessage);
var inboundInterceptors = _inboundInterceptorFactory.CreateInterceptors(scope, handler, busRequest, nimbusMessage);
foreach (var interceptor in inboundInterceptors)
{
_logger.Debug("Executing OnRequestHandlerExecuting on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
await interceptor.OnMulticastRequestHandlerExecuting(busRequest, nimbusMessage);
_logger.Debug("Executed OnRequestHandlerExecuting on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
}
try
{
var response = await handler.Handle(busRequest);
if (response != null)
{
var responseMessage = await _nimbusMessageFactory.CreateSuccessfulResponse(replyQueueName, response, nimbusMessage);
DispatchLoggingContext.NimbusMessage = responseMessage;
var outboundInterceptors = _outboundInterceptorFactory.CreateInterceptors(scope, nimbusMessage);
_logger.Debug("Sending successful response message {0} to {1} [MessageId:{2}, CorrelationId:{3}]",
responseMessage.SafelyGetBodyTypeNameOrDefault(),
replyQueueName,
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
foreach (var interceptor in outboundInterceptors)
{
await interceptor.OnMulticastResponseSending(response, nimbusMessage);
}
await replyQueueClient.Send(responseMessage);
foreach (var interceptor in outboundInterceptors.Reverse())
{
await interceptor.OnMulticastResponseSent(response, nimbusMessage);
}
_logger.Debug("Sent successful response message {0} to {1} [MessageId:{2}, CorrelationId:{3}]",
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
replyQueueName,
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
}
else
{
_logger.Debug("Handler declined to reply. [MessageId: {0}, CorrelationId: {1}]", nimbusMessage.MessageId, nimbusMessage.CorrelationId);
}
}
catch (Exception exc)
{
// Capture any exception so we can send a failed response outside the catch block
exception = exc;
}
if (exception == null)
{
foreach (var interceptor in inboundInterceptors.Reverse())
{
_logger.Debug("Executing OnRequestHandlerSuccess on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
await interceptor.OnMulticastRequestHandlerSuccess(busRequest, nimbusMessage);
_logger.Debug("Executed OnRequestHandlerSuccess on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
}
}
else
{
foreach (var interceptor in inboundInterceptors.Reverse())
{
_logger.Debug("Executing OnRequestHandlerError on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
await interceptor.OnMulticastRequestHandlerError(busRequest, nimbusMessage, exception);
_logger.Debug("Executed OnRequestHandlerError on {0} for message [MessageType:{1}, MessageId:{2}, CorrelationId:{3}]",
interceptor.GetType().FullName,
nimbusMessage.SafelyGetBodyTypeNameOrDefault(),
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
}
var failedResponseMessage =
await _nimbusMessageFactory.CreateFailedResponse(replyQueueName, nimbusMessage, exception);
_logger.Warn("Sending failed response message to {0} [MessageId:{1}, CorrelationId:{2}]",
replyQueueName,
exception.Message,
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
await replyQueueClient.Send(failedResponseMessage);
_logger.Debug("Sent failed response message to {0} [MessageId:{1}, CorrelationId:{2}]",
replyQueueName,
nimbusMessage.MessageId,
nimbusMessage.CorrelationId);
}
}
}
public async Task <TResponse> SendRequest <TRequest, TResponse>(IBusRequest <TRequest, TResponse> busRequest, TimeSpan timeout)
where TRequest : IBusRequest <TRequest, TResponse>
where TResponse : IBusResponse
{
var requestType = busRequest.GetType();
_knownMessageTypeVerifier.AssertValidMessageType(requestType);
var queuePath = _router.Route(requestType, QueueOrTopic.Queue);
var nimbusMessage = (await _nimbusMessageFactory.Create(queuePath, busRequest))
.WithRequestTimeout(timeout)
;
DispatchLoggingContext.NimbusMessage = nimbusMessage;
var expiresAfter = _clock.UtcNow.Add(timeout);
var responseCorrelationWrapper = _requestResponseCorrelator.RecordRequest <TResponse>(nimbusMessage.MessageId, expiresAfter);
var sw = Stopwatch.StartNew();
using (var scope = _dependencyResolver.CreateChildScope())
{
Exception exception;
var interceptors = _outboundInterceptorFactory.CreateInterceptors(scope, nimbusMessage);
try
{
_logger.LogDispatchAction("Sending", queuePath, sw.Elapsed);
var sender = _transport.GetQueueSender(queuePath);
foreach (var interceptor in interceptors)
{
await interceptor.OnRequestSending(busRequest, nimbusMessage);
}
await sender.Send(nimbusMessage);
foreach (var interceptor in interceptors.Reverse())
{
await interceptor.OnRequestSent(busRequest, nimbusMessage);
}
_logger.LogDispatchAction("Sent", queuePath, sw.Elapsed);
_logger.LogDispatchAction("Waiting for response to", queuePath, sw.Elapsed);
var response = await responseCorrelationWrapper.WaitForResponse(timeout);
_logger.LogDispatchAction("Received response to", queuePath, sw.Elapsed);
return(response);
}
catch (Exception exc)
{
exception = exc;
}
foreach (var interceptor in interceptors.Reverse())
{
await interceptor.OnRequestSendingError(busRequest, nimbusMessage, exception);
}
_logger.LogDispatchError("sending", queuePath, sw.Elapsed, exception);
//FIXME "sending" here is a bit misleading. The message could have been sent and the response not received.
ExceptionDispatchInfo.Capture(exception).Throw();
return(default(TResponse));
}
}
// ReSharper disable UnusedMember.Local
private async Task Dispatch <TBusRequest, TBusResponse>(TBusRequest busRequest, NimbusMessage nimbusMessage, Type handlerType)
where TBusRequest : IBusRequest <TBusRequest, TBusResponse>
where TBusResponse : IBusResponse
{
var replyQueueName = nimbusMessage.From;
var replyQueueClient = _transport.GetQueueSender(replyQueueName);
using (var scope = _dependencyResolver.CreateChildScope())
{
var handler = (IHandleRequest <TBusRequest, TBusResponse>)scope.Resolve(handlerType);
_propertyInjector.Inject(handler, nimbusMessage);
var inboundInterceptors = _inboundInterceptorFactory.CreateInterceptors(scope, handler, busRequest, nimbusMessage);
Exception exception = null;
try
{
foreach (var interceptor in inboundInterceptors)
{
_logger.Debug("Executing OnRequestHandlerExecuting for {InterceptorType}", interceptor.GetType().Name);
await interceptor.OnRequestHandlerExecuting(busRequest, nimbusMessage);
_logger.Debug("Executed OnRequestHandlerExecuting for {InterceptorType}", interceptor.GetType().Name);
}
_logger.Debug("Dispatching to {HandlerType}", handler.GetType().Name);
var handlerTask = handler.Handle(busRequest);
var response = await handlerTask;
_logger.Debug("Dispatched to {HandlerType}", handler.GetType().Name);
var responseMessage = await _nimbusMessageFactory.CreateSuccessfulResponse(replyQueueName, response, nimbusMessage);
DispatchLoggingContext.NimbusMessage = responseMessage;
var outboundInterceptors = _outboundInterceptorFactory.CreateInterceptors(scope, nimbusMessage);
foreach (var interceptor in outboundInterceptors.Reverse())
{
_logger.Debug("Executing OnResponseSending for {InterceptorType}", interceptor.GetType().Name);
await interceptor.OnResponseSending(response, responseMessage);
_logger.Debug("Executed OnResponseSending for {InterceptorType}", interceptor.GetType().Name);
}
_logger.Debug("Sending successful response message");
await replyQueueClient.Send(responseMessage);
_logger.Debug("Sent successful response message");
foreach (var interceptor in outboundInterceptors.Reverse())
{
_logger.Debug("Executing OnResponseSent for {InterceptorType}", interceptor.GetType().Name);
await interceptor.OnResponseSent(response, responseMessage);
_logger.Debug("Executed OnResponseSent for {InterceptorType}", interceptor.GetType().Name);
}
}
catch (Exception exc)
{
// Capture any exception so we can send a failed response outside the catch block
exception = exc;
_logger.Warn(exc, "Request message dispatch failed.");
}
if (exception == null)
{
foreach (var interceptor in inboundInterceptors.Reverse())
{
_logger.Debug("Executing OnRequestHandlerSuccess for {InterceptorType}", interceptor.GetType().Name);
await interceptor.OnRequestHandlerSuccess(busRequest, nimbusMessage);
_logger.Debug("Executed OnRequestHandlerSuccess for {InterceptorType}", interceptor.GetType().Name);
}
}
else
{
foreach (var interceptor in inboundInterceptors.Reverse())
{
_logger.Debug("Executing OnRequestHandlerError for {InterceptorType}", interceptor.GetType().Name);
await interceptor.OnRequestHandlerError(busRequest, nimbusMessage, exception);
_logger.Debug("Executed OnRequestHandlerError for {InterceptorType}", interceptor.GetType().Name);
}
var failedResponseMessage = (await _nimbusMessageFactory.CreateFailedResponse(replyQueueName, nimbusMessage, exception));
_logger.Debug("Sending failed response message");
await replyQueueClient.Send(failedResponseMessage);
_logger.Debug("Sent failed response message");
}
}
}