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Learning Reactive Programming With Java 8

Learning Reactive Programming With Java 8

By : Nickolay Tzvetinov
3.6 (5)
Buy this Book
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Learning Reactive Programming With Java 8

Learning Reactive Programming With Java 8

3.6 (5)
By: Nickolay Tzvetinov
Buy this Book

Overview of this book

If you are a Java developer that knows how to write software and would like to learn how to apply your existing skills to reactive programming, this book is for you.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. An Introduction to Reactive Programming
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1. An Introduction to Reactive Programming
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What is reactive programming?
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Why should we be reactive?
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Introducing RxJava
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Summary
2
2. Using the Functional Constructions of Java 8
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2. Using the Functional Constructions of Java 8
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Lambdas in Java 8
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Implementing the reactive sum example with lambdas
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Pure functions and higher order functions
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Summary
3
3. Creating and Connecting Observables, Observers, and Subjects
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3. Creating and Connecting Observables, Observers, and Subjects
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The Observable.from method
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The Observable.just method
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Other Observable factory methods
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The Observable.create method
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Subscribing and unsubscribing
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Hot and cold Observable instances
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The Subject instances
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Summary
4
4. Transforming, Filtering, and Accumulating Your Data
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4. Transforming, Filtering, and Accumulating Your Data
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Observable transformations
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Filtering data
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Accumulating data
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Summary
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5. Combinators, Conditionals, and Error Handling
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5. Combinators, Conditionals, and Error Handling
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Combining the Observable instances
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The conditional operators
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Handling errors
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An HTTP client example
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Summary
6
6. Using Concurrency and Parallelism with Schedulers
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6. Using Concurrency and Parallelism with Schedulers
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RxJava's schedulers
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Buffering, throttling, and debouncing
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Summary
7
7. Testing Your RxJava Application
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7. Testing Your RxJava Application
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Testing using simple subscription
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The BlockingObservable class
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The aggregate operators and the BlockingObservable class
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Testing with the aggregate operators and the BlockingObservable class
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Using the TestSubscriber class for in-depth testing
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Testing asynchronous Observable instances with the help of the TestScheduler class
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Summary
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8. Resource Management and Extending RxJava
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8. Resource Management and Extending RxJava
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Resource management
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Caching data with Observable.cache
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Creating custom operators with lift
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Composing multiple operators with the Observable.compose operator
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Summary
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Index
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Index

Lambdas in Java 8

The most important change in Java 8 is the introduction of lambda expressions. They enable faster, clearer coding and make it possible to use functional programming.

Java was created back in the '90s as an object-oriented programming language, with the idea that everything should be an object. At that time, object-oriented programming was the principal paradigm for software development. But, recently, functional programming has become increasingly popular because it is well-suited for concurrent and event-driven programming. This doesn't mean that we should stop writing code using object-oriented languages. Instead, the best strategy is to mix elements of object-oriented and functional programming. Adding lambdas to Java 8 ties in with this idea—Java is an object-oriented language, but now it has lambdas, we are able to code using the functional style too.

Let's look at this new feature in detail.

Introducing the new syntax and semantics

In order to...

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Learning Reactive Programming With Java 8
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