Book Image

Java EE 8 High Performance

By : Romain Manni-Bucau
Book Image

Java EE 8 High Performance

By: Romain Manni-Bucau

Overview of this book

The ease with which we write applications has been increasing, but with this comes the need to address their performance. A balancing act between easily implementing complex applications and keeping their performance optimal is a present-day need. In this book, we explore how to achieve this crucial balance while developing and deploying applications with Java EE 8. The book starts by analyzing various Java EE specifications to identify those potentially affecting performance adversely. Then, we move on to monitoring techniques that enable us to identify performance bottlenecks and optimize performance metrics. Next, we look at techniques that help us achieve high performance: memory optimization, concurrency, multi-threading, scaling, and caching. We also look at fault tolerance solutions and the importance of logging. Lastly, you will learn to benchmark your application and also implement solutions for continuous performance evaluation. By the end of the book, you will have gained insights into various techniques and solutions that will help create high-performance applications in the Java EE 8 environment.
Table of Contents (12 chapters)

Context and Dependency Injection – what did you do to my beans?

Context and Dependency Injection (CDI) is the central specification of Java EE. Its role is to manage the beans you define. It is directly linked to the pattern called Inversion of Control (IoC), which provides a way to obtain loose coupling between your classes. The goal is to be flexible on the way so that the current instances are linked together. It also controls the life cycle and the instantiation of instances.

IoC – a pretty simple example

Before exploring the CDI, let's use a very simple example (I would say, a handmade example) to illustrate what a bean container is.

We will use an application that has TimeService, which simply provides...