Book Image

Java 9 Concurrency Cookbook, Second Edition - Second Edition

By : Javier Fernández González
Book Image

Java 9 Concurrency Cookbook, Second Edition - Second Edition

By: Javier Fernández González

Overview of this book

Writing concurrent and parallel programming applications is an integral skill for any Java programmer. Java 9 comes with a host of fantastic features, including significant performance improvements and new APIs. This book will take you through all the new APIs, showing you how to build parallel and multi-threaded applications. The book covers all the elements of the Java Concurrency API, with essential recipes that will help you take advantage of the exciting new capabilities. You will learn how to use parallel and reactive streams to process massive data sets. Next, you will move on to create streams and use all their intermediate and terminal operations to process big collections of data in a parallel and functional way. Further, you’ll discover a whole range of recipes for almost everything, such as thread management, synchronization, executors, parallel and reactive streams, and many more. At the end of the book, you will learn how to obtain information about the status of some of the most useful components of the Java Concurrency API and how to test concurrent applications using different tools.
Table of Contents (12 chapters)

Customizing tasks running in the fork/join framework

The Executor framework separates task creation and its execution. With it, you only have to implement the Runnable objects and use an Executor object. You just need to send the Runnable tasks to the executor and it creates, manages, and finalizes the necessary threads to execute these tasks.

Java 9 provides a special kind of executor in the fork/join framework (introduced in Java 7). This framework is designed to solve problems that can be broken down into smaller tasks using the divide and conquer technique. Inside a task, you have to check the size of the problem you want to resolve; if it's bigger than the established size, you divide the problem into two or more tasks and execute them using the framework. If the size of the problem is smaller than the established size, you resolve the problem directly in the task; optionally, it returns a result. The...