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

Second example - file search

All operating systems include the option to search for files that verify some conditions in your file system (for example, the name or part of the name, the date of modification, and so on). In our case, we're going to implement an algorithm that looks for a file with a predetermined name. Our algorithms will take the initial path to start the search and the file we're going to look for as input. The JDK provides the ability to walk a directory tree structure, so there should be no need to implement your own in the real world.

Common classes

Both versions of the algorithm will share a common class to store the results of our search. We will call this class Result and it will have two attributes: a Boolean value named found that determines if we have found the file we were looking for and a String value named path with the full path of the file if we have found it.

The code for this class is very simple so it won't be included here.

Serial version

The serial version...