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

Testing concurrency applications

Testing concurrency applications is a hard task. The threads of your application run on your computer without any guarantee of their execution order (except the synchronization mechanisms that you have included), so it's very difficult (impossible most of the time) to test all the circumstances that can occur. You can have errors impossible to reproduce because it only happens under rare or unique circumstances, or errors that happen on one machine but not on others due to the number of cores within the CPU. To detect and reproduce this situation, you can use different tools:

  • Debug: You can use a debugger to debug the application. This process will be very tedious if you have only a few threads in the application and you have to go step by step in every thread. You can configure Eclipse or NetBeans to test concurrent applications.
  • MultithreadedTC: This is an archived project of Google Code that can be used to force the order of execution in a concurrent application...