JRebel Quick Start

Follow this quide to get JRebel up and running.
Pick your IDE on the right.

Eclipse

Installation Installing the JRebel plugin

  1. Open Help > Eclipse Marketplace…
  2. Search for JRebel. Found it? Press Install.
  3. Next→ Activation

Didn't work?

Don’t worry, you can also install JRebel using:

Did this work?

If the installation was a success, your IDE will restart. After the restart, JRebel will alert you via a notification.

Activation Getting a license

  1. Open Help > JRebel Activation.
  2. Fill out the form.
  3. Press Activate JRebel.
  4. Next → Server configuration

Got a license?

Press I already have a license in the activation window.
  • Activation code. Paste your activation code if you have one already.
  • License file from the hard drive. Point to your jrebel.lic file. You get this file via email when you purchase JRebel.
  • Connect to License Server. Enter your Group URL and email. You get the Group URL from your network administrator.

Did this work?

JRebel will let you know that your license is activated via a notification.

You can also see your license status from the JRebel Configuration, under the Help menu.

Server configuration Enabling JRebel agent for your server

  1. Open Help > JRebel Configuration > Startup.
  2. Select Run via IDE.
  3. Select the check-box next to your server. Doing this will automatically run your server with the required JVM arguments.
  4. Next → Project configuration

Good to know

Not running your server from the IDE?

Did this work?

When successful, you will see the JRebel banner in the console right at server startup. This is what the JRebel banner should look like:
2015-07-30 11:23:20 JRebel:  #######################################################
2015-07-30 11:23:20 JRebel:  
2015-07-30 11:23:20 JRebel:  JRebel Legacy Agent 6.2.2 (201507291221)
2015-07-30 11:23:20 JRebel:  (c) Copyright ZeroTurnaround AS, Estonia, Tartu.
2015-07-30 11:23:20 JRebel:  
2015-07-30 11:23:20 JRebel:  Over the last 1 days JRebel prevented
2015-07-30 11:23:20 JRebel:  at least 0 redeploys/restarts saving you about 0 hours.
2015-07-30 11:23:20 JRebel:  
2015-07-30 11:23:20 JRebel:  Licensed to ZeroTurnaround.
2015-07-30 11:23:20 JRebel:  
2015-07-30 11:23:20 JRebel:  #######################################################

Project configuration Mapping your workspace to the deployed application

  1. Open Help > JRebel Configuration > Projects.
  2. Select the check-box next to your project. Doing this will generate a rebel.xml file and keep it up to date.
  3. Redeploy your application!
  4. Next → Completion

Didn't work?

Did this work?

When building your application, rebel.xml should be included within the application archive.
  • In case of JAR files, rebel.xml should be included in the root folder.
  • When working with WAR files, the rebel.xml should be located within the WEB-INF/classes folder.
  • EAR files require a rebel.xml for each internal EAR module (that means JARs and WARs).

Completion Enabling automatic build

  1. Open Project > enable Build Automatically.
  2. And you’re done!

Why do this?

JRebel relies upon your IDE to do the compiling. Enabling Build Automatically ensures that your .java files are compiled to .class files.

JRebel reloads your compiled .class files and not your .java files. When you change code, JRebel pushes the changed classes and resources to the server without redeploying.
Learn more from JRebel Documentation