Book Image

Mastering Concurrency Programming with Java 9 - Second Edition

By : Javier Fernández González
Book Image

Mastering Concurrency Programming with Java 9 - Second Edition

By: Javier Fernández González

Overview of this book

Concurrency programming allows several large tasks to be divided into smaller sub-tasks, which are further processed as individual tasks that run in parallel. Java 9 includes a comprehensive API with lots of ready-to-use components for easily implementing powerful concurrency applications, but with high flexibility so you can adapt these components to your needs. The book starts with a full description of the design principles of concurrent applications and explains how to parallelize a sequential algorithm. You will then be introduced to Threads and Runnables, which are an integral part of Java 9's concurrency API. You will see how to use all the components of the Java concurrency API, from the basics to the most advanced techniques, and will implement them in powerful real-world concurrency applications. The book ends with a detailed description of the tools and techniques you can use to test a concurrent Java application, along with a brief insight into other concurrency mechanisms in JVM.
Table of Contents (21 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Introduction to reactive streams in Java

In the introduction of this chapter, we explained what reactive streams are, which elements form the standard, and how those elements are implemented in Java:

  • TheFlow.Publisher interface: This interface represents a producer of items.
  • TheFlow.Subscriber interface: This interface represents a consumer of items.
  • TheFlow.Subscription interface: This interface represents the connection between a producer and a consumer. The class that implements it manages the item interchange between the producer and the consumer.

In addition to these three interfaces, we have the SubmissionPublisher class that implements the Flow.Publisher interface. It also uses an implementation of the Flow.Subscription interface. It implements the method of the Flow.Publisher interface that allows the subscription of consumers and also methods to send items to those consumers, so we only have to implement one or more classes that implement the Flow.Subscriber interface.

Let's look at...