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Learning RxJava

You're reading from   Learning RxJava Reactive, Concurrent, and responsive applications

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787120426
Length 400 pages
Edition 1st Edition
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Author (1):
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Thomas Nield Thomas Nield
Author Profile Icon Thomas Nield
Thomas Nield
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Table of Contents (14) Chapters Close

Preface 1. Thinking Reactively FREE CHAPTER 2. Observables and Subscribers 3. Basic Operators 4. Combining Observables 5. Multicasting, Replaying, and Caching 6. Concurrency and Parallelization 7. Switching, Throttling, Windowing, and Buffering 8. Flowables and Backpressure 9. Transformers and Custom Operators 10. Testing and Debugging 11. RxJava on Android 12. Using RxJava for Kotlin New Appendix

Error recovery operators

Exceptions can occur in your Observable chain across many operators depending on what you are doing. We already know about the onError() event that is communicated down the Observable chain to the Observer. After that, the subscription terminates and no more emissions will occur. But sometimes, we want to intercept exceptions before they get to the Observer and attempt some form of recovery. We cannot necessarily pretend that the error never happened and expect emissions to resume, but we can attempt re-subscribing or switch to an alternate source Observable.

We can still do the former, just not with RxJava operators, which we will see shortly. If you find that the error recovery operators do not meet your needs, chances are you can compose them creatively.

 

For these examples, let's divide each integer emission by 10, where one of the emissions...

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