do broadway listeners have priority?

[broadway]

do broadway listeners have priority?

[mbadolato]

What is your use case?

[cordoval]

i was just curious since symfony event listeners do have priority if that thing works in broadway too or if there is any thing like that similar or any usage.

[mbadolato]

I don't really know that there's a need for one without specific use cases. The listeners are projectors and processors so I don't know that a priority is really of any use

[cordoval]

yeah I guess we don't have a use case really. Closing then, big thanks 👍 👴 you are the saga 🎱

[francescotrucchia]

In my use case I need to send an email after an event is dispatched. In the email I need some information created after a projection handle by the same event. In my case have a priority could be useful

[wjzijderveld]

@francescotrucchia That is in the nature of eventual consistency. There is no promise which projector or processor get's the event first. There are quit some good resources about this: https://www.google.nl/search?q=event+sourcing+eventual+consistency

[codeliner]

@francescotrucchia In addition to the eventual consistency topic you may need a process manager aka Saga when your email depends on information created by a projection. This can be a simple class listening on the event and delegating the work to the projection first and in a second step to the email service.

[francescotrucchia]

@wjzijderveld @codeliner thanks for suggestions 👍

[francescotrucchia]

@wjzijderveld I understand the problem of eventual consistency, but in an environment request/response where the process are synchronous I think that the ventual consistency doesn't exists and in this case could be more pragmatic using the priority on listener.

[codeliner]

@francescotrucchia I can follow your argument, but eventual consistency depends on the transaction boundary not on PHP's request/response environment.