Is RxJava a good fit for branching workflows?

Question

I am using RxJava to process some notifications that we pull from a queue.

RxJava seemed to work fine with a simple workflow, now with new requirements coming in, the fl

Answer 1

Just an idea for another approach which may work for you: Instead of grouping/toMap, you could multicast the source and handle the branches individually.

Example:

@Test
public void multicastingShare() {
    final Observable sharedSource = Observable.range(1, 10)
            .doOnSubscribe(dummy -> System.out.println("subscribed"))
            .share();
    // split by some criteria
    final Observable oddItems = sharedSource
            .filter(n -> n % 2 == 1)
            .map(odd -> "odd: " + odd)
            .doOnNext(System.out::println);
    final Observable evenItems = sharedSource
            .filter(n -> n % 2 == 0)
            .map(even -> "even: " + even)
            .doOnNext(System.out::println);

    // recombine the individual streams at some point
    Observable.concat(oddItems, evenItems)
            .subscribe(result -> System.out.println("result: " + result));
}

This video may be be helpful (at least the first 15 min)