在Observable中发出超时项

Question

I have two PublishSubject s that model a queue where I receive and push jobs to.

I want to be able to react to jobs that have been consumed from the first PublishSubject , but not put in the second PublishSubject in a given time window (eg 10s):

final Subject<Job> queue = PublishSubject.<Job>create().toSerialized();
final Subject<Job> done = PublishSubject.<Job>create().toSerialized();
// this is probably wrong already since I am consuming items from queue
queue.subscribe(done::onNext);

final Observable<Job> timeOut = queue.timeout(10, SECONDS, Observable.empty()); // ??

Answer 1

You haven't described what you actually want to do after 10 seconds pass. Do you want to re-add that job to queue again? Do you want to just get information if processing takes more than 10 secs, or do you want to skip that job if it takes too long?

If you want to skip processing that job and resume with some new observable you can flatMap each element of queue and timeout them separately.

Observable<Job> observableThatWillTriggerOnTimeout = ...
queue.flatMap(job -> dispatchJob(job)
                    .timeout(10, TimeUnit.SECONDS, observableThatWillTriggerOnTimeout)
             )

Tell more about your scenario, I will update my answer if necessary