Book Image

Java EE 8 Development with Eclipse - Third Edition

By : Ram Kulkarni
Book Image

Java EE 8 Development with Eclipse - Third Edition

By: Ram Kulkarni

Overview of this book

Java EE is one of the most popular tools for enterprise application design and development. With recent changes to Java EE 8 specifications, Java EE application development has become a lot simpler with the new specifications, some of which compete with the existing specifications. This guide provides a complete overview of developing highly performant, robust and secure enterprise applications with Java EE with Eclipse. The book begins by exploring different Java EE technologies and how to use them (JSP, JSF, JPA, JDBC, EJB, and more), along with suitable technologies for different scenarios. You will learn how to set up the development environment for Java EE applications and understand Java EE specifications in detail, with an emphasis on examples. The book takes you through deployment of an application in Tomcat, GlassFish Servers, and also in the cloud. It goes beyond the basics and covers topics like debugging, testing, deployment, and securing your Java EE applications. You'll also get to know techniques to develop cloud-ready microservices in Java EE.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Free Chapter
1
Introducing JEE and Eclipse
Index

Chapter 11. Java CPU Profiling and Memory Tracking

In the previous chapter, we learned how to use the JMS (Java Messaging Service) APIs to write asynchronous applications. In this chapter, we will learn about some of the techniques and tools used to profile Java applications. Enterprise applications tend to be quite complex and big. There could be situations where the application does not perform as per your requirements or expectations. For example, some of the operations performed in the application might be taking too long or consuming more memory than you expected. Furthermore, debugging performance and memory issues can sometimes become very difficult.

Fortunately, there are tools available, both in JDK and Eclipse, to help us debug these issues. JDK 6 (update 7) and above are bundled with the jVisualVM application that can connect to remote or local applications. You can find this tool in the <JDK_HOME>/bin folder. jVisualVM can help you profile memory and CPU usage. It can also...