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)

GlassFish ad hoc monitoring

Many servers have inbuilt monitoring capabilities. This depends highly on the server, but it can give some interesting insights without having to use another tool. This is precious when you don't control the machine or don't have the permissions to access/configure the server.

To illustrate this kind of monitoring, let's use our Java EE reference implementation: GlassFish.

Once started with the normal ./bin/asadmin start-domain command, you can activate monitoring with this additional command:

$ ./bin/asadmin enable-monitoring
Command enable-monitoring executed successfully.

Indeed, there is a symmetric command if you want to deactivate monitoring:

$./bin/asadmin disable-monitoring

You can list the monitors available with the get command:

$ ./bin/asadmin get server.monitoring-service.*