June 2017
Intermediate to advanced
400 pages
8h 44m
English
Content preview from Learning RxJava
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Nuances of observeOn()
observeOn()comes with nuances to be aware of, especially when it comes to performance implications due to lack of backpressure, which we will cover in Chapter 8, Flowables and Backpressure.
Say, you have an Observable chain with two sets of operations, Operation A and Operation B. Let's not worry what operators each one is using. If you do not have any observeOn()between them, the operation will pass emissions strictly one at a time from the source to Operation A, then Operation B, and finally to the Observer. Even with a subscribeOn(), the source will not pass the next emission down the chain until the current one is passed all the way to the Observer.
This changes when you introduce an observeOn() and say we put ...
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