To get the most out of this book

1. A minimal knowledge of the Java technology is needed to follow this book
2. Some basic experience on performance investigation is nice to have
3. Some knowledge of distributed systems, although not mandatory, can help you to understand some parts
4. A computer where you can develop and run a Java application is highly encouraged even if not mandatory. A setup example is a machine with Linux or Windows, 1 GB (recommended 2 GB) of memory, a dual core CPU and at least 1 GB of available disk space.
5. Being able to use a console would greatly help

Download the example code files

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Java-EE-8-High-Performance. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: http://www.packtpub.com/sites/default/files/downloads/JavaEE8HighPerformance_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Most of this book will work with a web profile server, so we will package our application as war:"

A block of code is set as follows:

<packaging>war</packaging>

Any command-line input or output is written as follows:

$ export JAVA_HOME=/home/developer/jdk1.8.0_144
$ export MAVEN_HOME=/home/developer/apache-maven-3.5.0

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Warnings or important notes appear like this.

Tips and tricks appear like this.