MassTransit and ASP.NET

[Jeff Doolittle]

I'm trying to integrate a web application with MassTransit where published messages can be sent to the bus, and request/response messages can be handled as well.

I have the basic scenario working fine when a client calls the bus directly such as

Console App (publisher) ==> Mass Transit ==> ConsumingService (subscriber)

and

Console App (requester) ==> Mass Transit ==> ConsumingService (replier) ==> Mass Transit ==> Console App (receiver)

I've also got publish working with an Asp.Net application (with both NancyFx and WebApi)

Web Client (POST publish) ==> Asp.Net (nancy or webapi) ==> Mass Transit ==> ConsumingService (subscriber)

What I *can't* get working is this (regardless of whether I use NancyFx or WebApi):

Web Client (POST request) ==> Asp.Net (nancy or webapi) ==> Mass Transit ==> ConsumingService (replier) ==> Mass Transit ==> Asp.Net ==> Web Client (receiver)

In the RabbitMQ management web application, I noticed that I'm getting and Exchange and a Queue for the Console app client. However, for the Asp.Net application, I get an exchange with no queue for the replies to go out through.

I can't figure out why there is not reply queue being created. All I get is a "MassTransit.RequestTimeoutException" which makes sense if there is no queue for handling the replies.

Does anyone have suggestions or ideas for why this isn't working and how to get it working?

I appreciate any help and insights that might be available from the group.

Thanks,

--Jeff

[Alexey Zimarev]

Do you have a repo where you have this reproduced?

[Travis Smith]

Do you create a bus instance on startup for the webapp? It if you create a bus instance and bind consumers to a queue, it should be creating the queues and exchanges. 

On Thu, Jun 30, 2016 at 10:48 AM Alexey Zimarev <azim...@gmail.com> wrote:

Do you have a repo where you have this reproduced?

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-Travis

[Jeff Doolittle]

Yes, I'm creating it when the application starts up. Since everything works fine with the publish I can confirm that I'm actually creating a functioning bus. The issue is only on request/reply.

I'll work on getting a repo up today on github that demonstrates the problem.

--Jeff

[Travis Smith]

Does your consumer get the request part of the request message? 

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-Travis

[Jeff Doolittle]

Yes, the consumer receives the request. But since there is no reply queue created, the reply goes nowhere.

[Chris Patterson]

A couple of code snippets would really help here, particularly bus setup and the creation of the request client.

On Thu, Jun 30, 2016 at 11:26 AM, Jeff Doolittle <jeffdo...@gmail.com> wrote:

Yes, the consumer receives the request. But since there is no reply queue created, the reply goes nowhere.

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[Jeff Doolittle]

I'm working on putting a little repo together that I can share.

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[Jeff Doolittle]

https://github.com/jeffdoolittle/MassTransitBridge

[Jeff Doolittle]

I added some explanation over on the gitter channel. Thanks everyone for being willing to help.

On Thursday, June 30, 2016 at 1:36:46 PM UTC-7, Jeff Doolittle wrote:

https://github.com/jeffdoolittle/MassTransitBridge

[Chris Patterson]

Be sure to .Start() the bus or it won't process the responses. And Stop() it on shut down of the AppDomain. 

__
Chris Patterson

On Thu, Jun 30, 2016 at 1:36 PM -0700, "Jeff Doolittle" <jeffdo...@gmail.com> wrote:

https://github.com/jeffdoolittle/MassTransitBridge

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[Jeff Doolittle]

On snap <facepalm> Thanks Chris! Regarding the Appdomain, which event do I need to hook into for when an asp.net process completes? Is the following correct?

            AppDomain.CurrentDomain.ProcessExit += (o, args) =>

            {

                bus.Stop();

            };

Thanks Again,

--Jeff

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[Chris Patterson]

I think there is an Application_End method you can override for the web site. 

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Chris Patterson

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