Comments on: Exploring NServiceBus

By: Elegant Code » Retrospective of 2009, Planning for 2010

Elegant Code » Retrospective of 2009, Planning for 2010 — Sat, 02 Jan 2010 11:01:36 +0000

[...] learned more about integration patterns and ESB’s. I also learned about NServiceBus and I’m going to take this a few steps further in 2010. I’m hoping to get some real-world [...]

By: Eugen

Eugen — Mon, 14 Dec 2009 08:01:27 +0000

Thanks. Now it works

By: Jan Van Ryswyck

Jan Van Ryswyck — Sat, 12 Dec 2009 16:46:53 +0000

Just run NServiceBus.Host.exe:

http://code.google.com/p/elegantcode/source/browse/#svn/trunk/Spikes/NSB.Starbucks/Libraries/NServiceBus/TimeoutManager

By: Eugen

Eugen — Fri, 11 Dec 2009 13:05:27 +0000

No. I am not running it. Stupid question…how to run it correctly for this example ?

By: Jan Van Ryswyck

Jan Van Ryswyck — Fri, 11 Dec 2009 11:54:09 +0000

You have to run the timeout manager (look for the additional processes that NSB provides) while executing the sample. You can start this in a separate command prompt. This is needed in order to let NSB complete the sagas and that is why removing the line with MarkAsComplete() seems to work. MarkAsComplete() internally sends a message to the timeout manager.

By: Eugen

Eugen — Fri, 11 Dec 2009 07:41:46 +0000

Jan Van Ryswyck :@EugenAre you running the timeout manager?

I figured out why the messages weere repeated more times. It was because of MaxRetries="5" parameter. After futher investigation we found out that the customer wasn't receiveing the answer because of the following. We commented line MarkAsComplete(); in Cashier: public void Handle(PaymentMessage message) and Barista : private void DeliverOrder() and everything started working ! as i understand now NSB doesn't mark sagas as completed and doesn't erase them. Why the code is not working with MarkAsComplete() ? Any thoughts ?

By: Jan Van Ryswyck

Jan Van Ryswyck — Thu, 10 Dec 2009 12:04:40 +0000

@Eugen Are you running the timeout manager?

By: Eugen

Eugen — Thu, 10 Dec 2009 10:31:11 +0000

Hi ! Great post ! I downloaded the example and can’t figure out what’s wrong with it.

Casher receives 4 times message of payment in method
public void Handle(PaymentMessage message)

And the method within Barista is never called
public void Handle(PaymentCompleteMessage message)

And customer is not notified of OrderReady state !!!
What’s the problem ?
Thanks !

By: Karl

Karl — Sun, 01 Nov 2009 09:05:04 +0000

This is an excellent example for getting started with NServicebus and from my point of view should be contained in the official samples of the NServicebus package!

By: Elegant Code » Book Review: Enterprise Service Bus

Elegant Code » Book Review: Enterprise Service Bus — Fri, 30 Oct 2009 20:59:45 +0000

[...] In the end, I have a lot to think about after reading this book. It challenged a lot of my earlier assumptions on distributed computing and it certainly helped me understand a couple of things while I was exploring NServiceBus. [...]