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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 32.1
edited by Kieran Kelleher
on 2010/09/07 19:39
Change comment: There is no comment for this version

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1 -How-tos
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1 -XWiki.ruggiero
1 +XWiki.kieran
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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 +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 +
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 +
5 5  === How to install and use JRebel ===
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"]]
11 +* Download you version from [[ZeroTurnaround>>http://www.zeroturnaround.com]]
12 +* put the jrebel.jar somewhere nice, so you can use it in whatever project you are working
13 +* Go to WOLips->Preferences->Install Software, add [[http://www.zeroturnaround.com/update-site/]]
10 10  
11 -[[image:attach:AddZeroTurnAround.png]]
15 +[[image:AddZeroTurnAround.png]]
12 12  
13 13  * Download the Jrebel Eclipse Integration and perhaps the JRebel Eclipse Debugger Integration from install new Software
14 14  
15 -[[image:attach:InstallSoftware.png]]
19 +[[image:InstallSoftware.png]]
16 16  
17 17  * Make sure you have checked the JRebel Plugin in WOLips if you download the newest version.
18 18  
19 -[[image:attach:UpdateWOLipsWithJRebel.png]]
23 +[[image:UpdateWOLipsWithJRebel.png]]
20 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.
25 +* Restart Eclipse. You will now have a Jrebel preference item in your eclipse preferences
26 +* Goto to Preferences->JRebel, and point the Path to jrebel.jar to the jrebel.jar location from action 2.
22 22  
28 +[[image:PathToJRebel.png]]
29 +
23 23  You have now installed and setup the stuff that WOLips needs to know about the location of JRebel.jar.
24 24  
25 25  == How do you use it? ==
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32 32  
33 33  Select the tab, and check the check boxes to enable JRebel Agent and (eventually) Enable debug logging.
34 34  
35 -[[image:attach:EnableJRebel.png]]
42 +[[image:EnableJRebel.png]]
36 36  
37 37  Start you project from the Run Configuration.
38 38  
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39 39  Suddenly, you will get messages about jrebel being loaded, and some extra information about what settings are available as extra arguments.
40 40  
41 41  {{info}}
49 +
42 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 43  
44 44  -XX:MaxPermSize=384m
53 +
54 +
45 45  {{/info}}
46 46  
47 47  Start changing your java code on the fly: watch and start saving time.
48 48  
49 -[[image:attach:JRebelWOlipsLog.png]]
59 +[[image:JRebelWOLipsLog.png]]
50 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"]].
61 +* Profit (for the europeans: Extra Time Off)
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