How to compose requests?

[Ivan Baidakou]

Hi!

How can I compose responses? I'd like to have something like:

void method(event_based_actor *self, actor other_actor) {
  auto f1 = self->request(other_actor, 1s, my_atom::value);
  auto f2 = self->request(other_actor, 1s, my_atom::value);
  int counter = 0;
  compose(f1, f2).then([=](response_atom ok) mutable {
      if (++counter == 2) {
        // my action
      }
  },[=](error err){
      // my error action
  });
}


Thanks,
Ivan Baidakou

[Dominik Charousset]

Hi,

currently there is no convenience API for composing multiple request results. You have to it manually at the moment:

```

auto counter = std::make_shared<int>(0);

self->request(...).then([](...) {

  if (++*counter == 2) {

    // ...

  }

});

self->request(...).then([](...) {

  if (++*counter == 2) {

    // ...

  }

});

```

However, I think composing response promises is a common-enough use case to support it with first class primitives. I've created an issue for that [1].

[1] https://github.com/actor-framework/actor-framework/issues/932

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