Book Image

Java 9: Building Robust Modular Applications

By : Dr. Edward Lavieri, Peter Verhas, Jason Lee
Book Image

Java 9: Building Robust Modular Applications

By: Dr. Edward Lavieri, Peter Verhas, Jason Lee

Overview of this book

Java 9 and its new features add to the richness of the language; Java is one of the languages most used by developers to build robust software applications. Java 9 comes with a special emphasis on modularity with its integration with Jigsaw. This course is your one-stop guide to mastering the language. You'll be provided with an overview and explanation of the new features introduced in Java 9 and the importance of the new APIs and enhancements. Some new features of Java 9 are ground-breaking; if you are an experienced programmer, you will be able to make your enterprise applications leaner by learning these new features. You'll be provided with practical guidance in applying your newly acquired knowledge of Java 9 and further information on future developments of the Java platform. This course will improve your productivity, making your applications faster. Next, you'll go on to implement everything you've learned by building 10 cool projects. You will learn to build an email filter that separates spam messages from all your inboxes, a social media aggregator app that will help you efficiently track various feeds, and a microservice for a client/server note application, to name just a few. By the end of this course, you will be well acquainted with Java 9 features and able to build your own applications and projects. This Learning Path contains the best content from the following two recently published Packt products: • Mastering Java 9 • Java 9 Programming Blueprints
Table of Contents (33 chapters)
Title Page - Courses
Packt Upsell - Courses
Taking Notes with Monumentum

Terminating processes

To terminate a process we can call the destroy() method or the destroyForcibly() method on the ProcessHandle instance. Both of these methods will terminate the process. The destroy() method is expected to terminate the process gracefully executing the process shutdown sequence. In this case the shutdown hooks added to the run time are executed if the actual implementation supports the graceful, normal termination of processes. The destroyForcibly() method will enforce process termination, and in this case the shutdown sequence will not be executed.

If the process managed by the handle is not alive then nothing happens when the code calls any of these methods. If there are any CompletableFuture objects created calling the onExit() method on the handle then they will be completed after the call to the destroy() or destroyForcefully() method when the process has terminated. This means that the CompletableFuture object will return from a join() or some similar method after...