June 2015
Intermediate to advanced
182 pages
3h 56m
English
Content preview from Learning Reactive Programming With Java 8Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Subject instances
The Subject instances are both Observable instances and Observer instances. Like Observable instances, they can have multiple Observer instances, receiving the same notifications. That's why they can be used to turn cold Observable instances into hot ones. Like Observer instances, they give us access to their onNext(), onError(), or onCompleted() methods.
Let's look at an implementation of the preceding hot interval examples, using a Subject instance:
Observable<Long> interval = Observable.interval(100L, TimeUnit.MILLISECONDS); // (1)
Subject<Long, Long> publishSubject = PublishSubject.create(); // (2) interval.subscribe(publishSubject); // (3) Subscription sub1 = subscribePrint(publishSubject, "First"); Subscription sub2 = ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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