Automatonymous Saga with multiple correlated instances

[robinb...@gmail.com]

Hi all,

I'm using MT2 with Automatonymous. I have a state machine that correlates messages using the StateMachineSagaRepositoryConfigurator callback.

(configurator) =>
{
    configurator.Correlate(this.SomeEvent, (saga, message) => (saga.Id1 == message.Id1 && saga.Id2 == message.Id2);
}

My question is what is the expected behavior if the correlation step matches multiple saga instances? Doing some quick tests, it seems like if an event correlates to multiple instances, the event is raised on each instance. This is actually the desired behavior I was looking for, but I wanted to check to see If perhaps I was misunderstanding how it should work. Thank You.

- RBJ

[Chris Patterson]

That is exactly how it should work, glad it actually does :)

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[robinb...@gmail.com]

Excellent. Thanks for the quick reply Chris.

As a followup, I haven't had a chance to test yet, but what happens if no instances match the correlation? Does the message end up in the error queue, or does the saga just not raise any events?

On Tuesday, July 7, 2015 at 4:46:12 PM UTC-6, Chris Patterson wrote:

That is exactly how it should work, glad it actually does :)

On Tue, Jul 7, 2015 at 2:23 PM, <robinb...@gmail.com> wrote:

Hi all,

I'm using MT2 with Automatonymous. I have a state machine that correlates messages using the StateMachineSagaRepositoryConfigurator callback.

(configurator) =>
{
    configurator.Correlate(this.SomeEvent, (saga, message) => (saga.Id1 == message.Id1 && saga.Id2 == message.Id2);
}

My question is what is the expected behavior if the correlation step matches multiple saga instances? Doing some quick tests, it seems like if an event correlates to multiple instances, the event is raised on each instance. This is actually the desired behavior I was looking for, but I wanted to check to see If perhaps I was misunderstanding how it should work. Thank You.

- RBJ

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[Chris Patterson]

I'm pretty sure that it vanishes, or ends up on the error queue. One of those.

I think error queue. Because we've had to clean out error queues in production when engineers forget about the not created instance state event case. 

____
Chris Patterson

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