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Learning Reactive Programming With Java 8

You're reading from   Learning Reactive Programming With Java 8 Learn how to use RxJava and its reactive Observables to build fast, concurrent, and powerful applications through detailed examples

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Product type Paperback
Published in Jun 2015
Publisher Packt
ISBN-13 9781785288722
Length 182 pages
Edition 1st Edition
Languages
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Author (1):
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Nickolay Tzvetinov Nickolay Tzvetinov
Author Profile Icon Nickolay Tzvetinov
Nickolay Tzvetinov
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Table of Contents (10) Chapters Close

Preface 1. An Introduction to Reactive Programming FREE CHAPTER 2. Using the Functional Constructions of Java 8 3. Creating and Connecting Observables, Observers, and Subjects 4. Transforming, Filtering, and Accumulating Your Data 5. Combinators, Conditionals, and Error Handling 6. Using Concurrency and Parallelism with Schedulers 7. Testing Your RxJava Application 8. Resource Management and Extending RxJava Index

Chapter 3. Creating and Connecting Observables, Observers, and Subjects

RxJava's Observable instances are the building blocks of reactive applications, and this advantage of RxJava is beneficial. If we have a source Observable instance, we could chain logic to it and subscribe for the result. All we need is this initial Observable instance.

In the browser or in a desktop application, user input is already represented by events that we can handle and forward through Observable instances. But it would be great to turn all of our data changes or actions into Observable instances, not just user input. For example, when we read data from a file, it would be neat to look at every line read or every sequence of bytes as a message that can be emitted through an Observable instance.

We'll look in detail at how different data sources can be transformed into Observable instances; it doesn't matter if they are external (files or user input) or internal (collections or scalars...

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