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PHP Reactive Programming

You're reading from   PHP Reactive Programming Build fault tolerant and high performing application in PHP based on the reactive architecture

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786462879
Length 364 pages
Edition 1st Edition
Languages
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Author (1):
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Martin Sikora Martin Sikora
Author Profile Icon Martin Sikora
Martin Sikora
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Table of Contents (12) Chapters Close

Preface 1. Introduction to Reactive Programming 2. Reactive Programming with RxPHP FREE CHAPTER 3. Writing a Reddit Reader with RxPHP 4. Reactive versus a Typical Event-Driven Approach 5. Testing RxPHP Code 6. PHP Streams API and Higher-Order Observables 7. Implementing Socket IPC and WebSocket Server/Client 8. Multicasting in RxPHP and PHP7 pthreads Extension 9. Multithreaded and Distributed Computing with pthreads and Gearman 10. Using Advanced Operators and Techniques in RxPHP Appendix. Reusing RxPHP Techniques in RxJS

The Observable::create() method versus the Subject class


Apart from creating custom Observables, we know that we can use the Observable::create() static method or an instance of the Subject class to emit items by ourselves, but so far we haven't talked about which one we should choose over the other and why.

As a rule of thumb it's usually better to use Observable::create(). It's not always possible, but it has its advantages.

For the next couple of examples, let's consider that we want to work with an API that implements the following interface. This could be any Facebook/Twitter/WebSocket or system API:

interface RemoteAPI { 
    public function connect($connectionDetails); 
    public function fetch($path, $callback); 
    public function close(); 
} 

Hot/cold Observables and Observable::create()

In the most general sense an Observable is just a function that connects an observer with the producer of values. By producer we understand any source of values that is unrelated...

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