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Last modified by Markus Ruggiero on 2017/02/20 21:13
From version 28.1
edited by Johan Henselmans
on 2010/02/12 09:19
Change comment: There is no comment for this version
To version 36.1
edited by bogo
on 2011/11/07 12:55
Change comment: There is no comment for this version

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1 -XWiki.johanhenselmans
1 +XWiki.bogo
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1 -JRebel (previously called javarebel is a tool from [[ZeroTurnaround>>http://www.zeroturnaround.com]]).
1 +[[JRebel>>http://jrebel.com]] is a tool from [[ZeroTurnaround>>http://www.zeroturnaround.com]] that makes it possible for Java developers to instantly see any code change made to an app //without// redeploying. JRebel lets you see code changes instantly, versioning classes and resources individually and updating one at a time instead of as a lump application redeploy.
2 2  
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.
3 +=== How to install and use JRebel ===
4 4  
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]].
5 +* Get a free 30-day license, a[[open source developer license>>http://sales.zeroturnaround.com]] (Get JRebel for free section) or a paid license from [[ZeroTurnaround>>http://www.zeroturnaround.com]]
6 +* Put the license file (jrebel.lic) into a directory named .jrebel in your home directory. ( /.jrebel/jrebel.lic )
7 +* Get the JRebel plugin. Go to Eclipse->Preferences->Available Software Sites, add [[http://www.zeroturnaround.com/update-site/]]
6 6  
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.
8 -
9 -How to install and use JRebel
10 -
11 -1. Download you version from [[ZeroTurnaround>>http://www.zeroturnaround.com]]
12 -1. put the jrebel.jar somewhere nice, so you can use it in whatever project you are working
13 -1. Go to WOLips->Preferences->Install Software, add http:~/~/www.zeroturnaround.com/update-site/
14 -
15 15  [[image:AddZeroTurnAround.png]]
16 16  
17 -1. Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software
11 +* Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software
18 18  
19 19  [[image:InstallSoftware.png]]
20 -
21 21  
22 -1. Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
15 +* Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
23 23  
24 24  [[image:UpdateWOLipsWithJRebel.png]]
25 25  
26 -1. Restart Eclipse. You will now have a Jrebel preference item in your eclipse preferences
27 -1. Goto to Preferences->JRebel, and point the Path to jrebel.jar to the jrebel.jar location from action 2.
19 +* Restart Eclipse. You will now have a Jrebel preference item in your eclipse preferences and JRebel is ready for use with your projects.
28 28  
29 -[[image:PathToJRebel.png]]
30 -
31 31  You have now installed and setup the stuff that WOLips needs to know about the location of JRebel.jar.
32 32  
33 -How do you use it?
23 +== How do you use it? ==
34 34  
35 35  Well that has become very simple since the inclusion of Quinton Dolan's JRebel plugin in WOLips.
36 36  
37 -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.
27 +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.
38 38  
39 39  In the Run Configuration of a WOApplication you will notice an extra Tab, called JRebel.
40 40  
41 -Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
31 +Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
42 42  
43 43  [[image:EnableJRebel.png]]
44 44  
45 -Start you project from the Run Configuration.
35 +Start you project from the Run Configuration.
46 46  
47 -Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
37 +Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
48 48  
49 -Start changing your java code on the fly: watch and start saving time.
39 +{{info}}
50 50  
51 -Profit! (for the europeans: Extra Time Off!)
41 +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:
42 +
43 +\-XX:MaxPermSize=384m
44 +
45 +{{/info}}
46 +
47 +Start changing your java code on the fly: watch and start saving time.
48 +
49 +[[image:JRebelWOLipsLog.png]]
50 +
51 +* Profit (for the europeans: Extra Time Off)
52 +
53 +== More information ==
54 +
55 +[[Old screencast from David Avendasora about using JRebel with Eclipse 3.4>>http://www.wocommunity.org/podcasts/WOJavaRebel_Setup.mov]].