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  • Book Overview & Buying Learning Reactive Programming With Java 8
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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
5
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
8
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
9
Index
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Index

Other Observable factory methods

Here, we will inspect a few methods that can be used in combination with transforming operators such as flatMap or combining operators such as .zip file (more about this in the next chapter).

In order to examine their results, we will use the following method for creating subscriptions:

void subscribePrint(Observable<T> observable, String name) {
  observable.subscribe(
    (v) -> System.out.println(name + " : " + v),
    (e) -> {
      System.err.println("Error from " + name + ":");
      System.err.println(e.getMessage());
    },
    () -> System.out.println(name + " ended!")
  );
}

The idea of the preceding method is to subscribe to an Observable instance and label it with a name. On OnNext, it prints the value prefixed with the name; on OnError, it prints the error together with the name; and on OnCompleted, it prints 'ended!' prefixed with the name. This helps us debug the results.

Note

The...

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Learning Reactive Programming With Java 8
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