On Tuesday, February 7, 2012 1:12:04 PM UTC+1, Zdenek wrote:
>
> Hi! I have simple question about Places & Activities. I'd like to know how
> asynchronous calls (through RequestFactory) should be made, what's the best
> practice.
First, your questions are about MVP, not about Places or Activities.
1) Is good to control loading from the view? I mean passing receiver from
> the view to the activity to be able to act on onSuccess?
>
> public interface MyView extends IsWidget {
> void setPresenter(Presenter presenter);
>
> public interface Presenter {
> void goTo(Place place);
> void fetchSomeData(Receiver<List<SomeDataProxy>> receiver);
> void fetchSomeDataMore(SomeDataProxy someData,
> Receiver<List<SomeDataMoreProxy>> receiver);
> }
> }
>
> 2) Or should I go without passing receiver and define two-way
> communication? (IMO this approach's worse than 1st one)
>
> public interface MyView extends IsWidget {
> void setPresenter(Presenter presenter);
> void setSomeData(List<SomeDataProxy> someData);
> void setSomeDataMore(List<SomeDataMoreProxy> someDataMore);
>
> public interface Presenter {
> void goTo(Place place);
> void fetchSomeData();
> void fetchSomeDataMore(SomeDataProxy someData);
> }
> }
>
Your view shouldn't "fetch" data, that's the role of the presenter. The
presenter should "drive" the view, not the other way around. The view's
responsibility (besides displaying things) is to route user-initiated
events to the presenter so it can react to them.
Same for your goTo(Place) method: the view should tell the presenter that
some link/button/whatever has been "actioned", and the presenter translates
that into a Place and a call to PlaceController#goTo.
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