Simple way to pipe one observable into another?

Hey folks,

I went through the documentation but couldn’t find it, but my gut feeling says it’s there. Also the ConnectableObservable does not that what I want (I think?).

In my code I have something like this:

configProvider.closeBuckets().subscribe(new Observer<ClusterConfig>() {
    @Override
    public void onCompleted() {
        request.observable().onCompleted();
    }

    @Override
    public void onError(Throwable e) {
        request.observable().onError(e);
    }

    @Override
    public void onNext(ClusterConfig clusterConfig) {
        request.observable().onNext(clusterConfig);
    }
});

You can see that more or less I want to pipe all the stuff into a different observable. Something like.

configProvider.closeBuckets().subscribe(request.observable());

So I’d like to subscribe with another observable, if that makes sense?

[zsxwing]

Looks you are describing Subject?

[DylanSale]

Essentially, I am doing this (my code uses generics properly, I omitted them for brevity):

public class MyFragment extends Fragment {
    PublishSubject foo = PublishSubject.create();

    public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         addSubscription(getActivity().getHotObservable().map(etc).subscribe(foo));
    }

    public Observable getOutputObservable() { return foo; }
}

// Some other code
MyFragment frag = new MyFragment();
//then I add frag to the activity. This happens async so at some point in the future, 
//onActivityCreated will be called, but I want to use frag's observable here
//At this point, frag has not been attached to the Activity, so it has no "input" observable, thus
//the need to have the subject there. Without the subject, getOutputObservable would be null 
//and I'd have to add extra code to know when the fragment has been attached and has set up its observable.
frag.getOutputObservable().filter(func).subscribe(new Action1 etc);