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)

Java and the memory

Java is a high-level language, which means that it is doing a lot of work for you. Nowadays, most languages do that (such as Scala, Go, and even recent C++ updates), but to understand the memory challenge, we need to go back to the early programming days and compare two simple code segments.

The first one is a simplified version of our provisioning service, directly taken from our quote manager application:

public void refresh() {
final Client client = ClientBuilder.newClient();
try {
final String[] symbols = getSymbols(client);
for (String symbol : symbols) {
final Data data =
.resolveTemplate("symbol", symbol)
quoteService.createOrUpdate(new UpdateRequest(data...