CODEWITHSUNDEEP
c#.netnservicebus
pmarek
pmarek

Reputation: 45

Specify Message Handler Ordering in NServiceBus 6.x

ISpecifyMessageHandlerOrdering interface is obsolete in NServiceBus 6.x.

Documentation tells to specify order by calling ExecuteTheseHandlersFirst method on endpointConfiguration.

I am upgrading NSB from 5.x to 6.x. In solution I have endpointConfiguration in one core library and many handlers in other libraries. Is there a way to specify handler ordering in these other libraries (5.x manner)?

Upvotes: 1

Views: 266

Answers (1)

David Boike
David Boike

Reputation: 18645

If I'm understanding you correctly, your problem comes from the fact that an ISpecifyMessageHandlerOrdering implementation could be placed anywhere and be picked up by assembly scanning, where the EndpointConfiguration is in a predefined spot, and not where your handlers are. Correct?

If that's the case, I think the INeedInitialization interface would be the right extension point for you. It gives you access to the EndpointConfiguration and is picked up by assembly scanning.

Alternatively, there's a community project called NServiceBus.HandlerOrdering that allows you to express handler orderings more expressively right on the handler, adding interfaces like IWantToRunAfter<OtherHandler>. Here's a sample showing how that project works.

Upvotes: 2

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