Implementing request/reply in ECS about flecs HOT 3 CLOSED

Let's see I understand you correctly; you have a module with one system that can issue a request (SendRequestSystem), and with another system that is listening for requests (HandleRequestSystem) and another system that listens for replies (HandleReplySystem), where the latter is only interested in replies to requests sent by the SendRequestSystem.

If this is the case, then I think the approach you suggested works. You add a tag unique to the SendRequestSystem - HandleReplySystem combination to the entity with the request component, and in the HandleReplySystem you subscribe for this tag.

It does sound a bit contrived, but I can't say based on this information whether it's the right or wrong approach. Other than that, I don't see anything inherently wrong with it.

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@SanderMertens Yes, you have problem framed the issue well. And yes, that is the approach we are taking - I knew a callback like implementation for the response was not really ECSy ... so went with this ... I guess I wasn't necessarily happy with the solution, so was just kind of thinking out loud I guess, trying to reach for inspiration/alternatives and/or affirmation that we weren't doing anything inherently wrong.

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@teksoc-1 I'm closing this question, feel free to reopen if you want to discuss further!

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