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)

The Java Transaction API

The Java Transaction API (JTA) is the element responsible for providing the API responsible for ensuring the consistency of your data in the widest sense. In our quote manager, it is only applied to the database data but it can be applied to JMS messages, potentially files if you use connectors, and so on.

Without going through the details and protocol, the idea is to ensure, across multiple systems, that either all commits or all rollbacks but not something in between are done ensuring the consistency of the system (which is one common issue mixing NoSQL systems).

To do that, JTA uses what we call a two phases commit protocol:

  • Ask all systems to prepare the commit which means the system must verify and ensure it will be able to commit in next phase
  • Ask all systems to actually do the commit

A lot of transaction manager or servers are optimized for the...