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Last modified by Markus Ruggiero on 2017/02/20 21:13
From version 40.1
edited by Markus Ruggiero
on 2023/11/13 11:56
Change comment: Renamed back-links.
To version 30.1
edited by Johan Henselmans
on 2010/02/12 09:08
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1 -How-tos
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1 -XWiki.ruggiero
1 +XWiki.johanhenselmans
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1 -devtools
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1 -[[JRebel>>url:http://jrebel.com||shape="rect"]] is a tool from [[ZeroTurnaround>>url:http://www.zeroturnaround.com||shape="rect"]] 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.
1 +JRebel (previously called javarebel is a tool from [[ZeroTurnaround>>http://www.zeroturnaround.com]]).
2 2  
3 -=== Also take a look at: [[Using DCEVM and Hotswap for rapid turnaround>>doc:WOL.Home.WOLips.Using DCEVM and Hotswap for rapid turnaround.WebHome||shape="rect"]] ===
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.
4 4  
5 -=== How to install and use JRebel ===
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]].
6 6  
7 -* Get a free 30-day license, a[[open source developer license>>url:http://sales.zeroturnaround.com||shape="rect"]] (Get JRebel for free section) or a paid license from [[ZeroTurnaround>>url:http://www.zeroturnaround.com||shape="rect"]]
8 -* Put the license file (jrebel.lic) into a directory named .jrebel in your home directory. ( ~~/.jrebel/jrebel.lic )
9 -* Get the JRebel plugin. Go to Eclipse->Preferences->Available Software Sites, add [[http:~~/~~/www.zeroturnaround.com/update-site/>>url:http://www.zeroturnaround.com/update-site/||shape="rect"]]
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.
10 10  
11 -[[image:attach:AddZeroTurnAround.png]]
9 +How to install and use JRebel
12 12  
13 -* Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software
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 +1. Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software,
15 +1. Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
16 +1. Goto to preferences->JRebel, and point the Path to jrebel.jar to the jrebel.jar location from action 2.
14 14  
15 -[[image:attach:InstallSoftware.png]]
16 -
17 -* Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
18 -
19 -[[image:attach:UpdateWOLipsWithJRebel.png]]
20 -
21 -* Restart Eclipse. You will now have a Jrebel preference item in your eclipse preferences and JRebel is ready for use with your projects.
22 -
23 23  You have now installed and setup the stuff that WOLips needs to know about the location of JRebel.jar.
24 24  
25 -== How do you use it? ==
20 +How do you use it?
26 26  
27 27  Well that has become very simple since the inclusion of Quinton Dolan's JRebel plugin in WOLips.
28 28  
29 -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.
24 +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.
30 30  
31 31  In the Run Configuration of a WOApplication you will notice an extra Tab, called JRebel.
32 32  
33 -Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
28 +Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
34 34  
35 -[[image:attach:EnableJRebel.png]]
30 +Start you project from the Run Configuration.
36 36  
37 -Start you project from the Run Configuration.
32 +Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
38 38  
39 -Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
34 +Start changing your java code on the fly: watch and start saving time.
40 40  
41 -{{info}}
42 -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:
43 -
44 --XX:MaxPermSize=384m
45 -{{/info}}
46 -
47 -Start changing your java code on the fly: watch and start saving time.
48 -
49 -[[image:attach: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>>url:http://www.wocommunity.org/podcasts/WOJavaRebel_Setup.mov||shape="rect"]].
36 +Profit! (for the europeans: Extra Time Off!)
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