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Version 22.1 by Kieran Kelleher on 2011/07/25 20:06
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1 JRebel is a tool from [[ZeroTurnaround>>http://www.zeroturnaround.com]]).
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3 It is a java library that makes it possible to change java code while running a project in WOLips and see the results without having to restart. It is a great timesaver.
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5 If you are running Eclipse 3.4, you should have a look at the screencast from David Avendasora at [[http://www.wocommunity.org/podcasts/WOJavaRebel_Setup.mov]].
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7 If you are running WOLips 3.5.1 or bigger, you are lucky: the JRebel plugin is included in the current WOLips for there versions.
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9 === How to install and use JRebel ===
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11 * Get a free 30-day license, a open source developer license or a paid license from [[ZeroTurnaround>>http://www.zeroturnaround.com]]
12 * Put the license file (jrebel.lic) into a directory named .jrebel in your home directory. ( /.jrebel/jrebel.lic )
13 * Get the JRebel plugin. Go to Eclipse->Preferences->Available Software Sites, add [[http://www.zeroturnaround.com/update-site/]]
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15 [[image:AddZeroTurnAround.png]]
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17 * Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software
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19 [[image:InstallSoftware.png]]
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21 * Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
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23 [[image:UpdateWOLipsWithJRebel.png]]
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25 * Restart Eclipse. You will now have a Jrebel preference item in your eclipse preferences and JRebel is ready for use with your projects.
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27 You have now installed and setup the stuff that WOLips needs to know about the location of JRebel.jar.
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29 == How do you use it? ==
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31 Well that has become very simple since the inclusion of Quinton Dolan's JRebel plugin in WOLips.
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33 For a project in which want to use jrebel to change java code while running, go to the run configuration of the project, under the contextual menu Run As->Run Configurations.
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35 In the Run Configuration of a WOApplication you will notice an extra Tab, called JRebel.
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37 Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
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39 [[image:EnableJRebel.png]]
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41 Start you project from the Run Configuration.
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43 Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
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45 {{info}}
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47 If you get out of memory error with respect to "Perm Gen space", just allocate more Perm Gen memory in command line launch args in your launch configuration. For example:
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49 \-XX:MaxPermSize=384m
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51 {{/info}}
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53 Start changing your java code on the fly: watch and start saving time.
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55 [[image:JRebelWOLipsLog.png]]
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57 * Profit (for the europeans: Extra Time Off)