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JWT DeveloperFAQ

Revision as of 04:55, 20 May 2016 by Unnamed Poltroon (Talk) (Working with the JWT Source Code)

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Here are guidelines and Frequently Asked Questions for JWT developers and contributors.

See also :

Working with the JWT Source Code

Installing JWT Source Code from SVN

For information on how to access the JWT source code, the layout of the SVN repositories and the dependencies of JWT components, please refer to JWT SVN Information. For write access to the SVN you need to replace the anonymous access with your Eclipse committer account data.

Internal Layout of the JWT Source Code

See JWT SVN Information

Building, running and debugging the JWT Source Code


Working with Bugzilla

All developments are tracked using the Eclipse Bugzilla, be it a bug patch, a new feature, a user requirement or a build system enhancement.

How to get a Bugzilla account

Go there to get an Eclipse Bugzilla account : .

See also the bugzilla documentation at .

How to watch all JWT bugs

Log into the eclipse Bugzilla, then in the Bugzilla Preferences page , add the following emails in the "User watching" list at the bottom and save it:

  • for the workflow editor
  • jwt.metamodel-inbox@eclipse concerning the JWT metamodel
  • workflow administration and monitoring
  • previewing and validating workflows
  • transformations from one model to another
  • runtime support
  • for build process related issues and improvements
  • everything related to the website of JWT

How to Extend/Modify JWT

Legal Stuff

A comic that explains how to commit code correctly can be found here: IP Process in Cartoons.

Extending the Workflow Editor

The article Extending JWT-WE contains information on how JWT can be extended by user-defined plugins that provide e.g. external actions or additional views.

Modifying the Workflow Editor

The article Modifying JWT-WE provides information on how several recurring tasks (like adding preferences to the preferences menu) can be accomplished. It also lists good practices (API, string externalization...) that MUST be followed if you want your code to be contributed back to JWT.

Creating unit tests

JWT uses JUnit to handle unit testing. The article JWT_Automatic_Build includes information about how they are automated.

For now, we don't do GUI unit testing, besides having briefly tried SWTBot. If you want to, there are several solutions to Eclipse UI automated testing, which include Xored Q7 which is demonstrated testing JWT in this video (courtesy of Andrey Platov).

How to nicely fix a bug?

In order to provide an increasing quality, here is a suggestion of "how to solve a bug in JWT". These steps are not mandatory steps, however, we really encourage you to follow them, since they guarantee non-regression to JWT.

  1. If the bug is not reported in bugzilla, report it
  2. Check out the jwt plugin that contains the bug
  3. Check out the test plugin for this plugin
  4. Add a new non-regression test in the test plugin (if possible, if is it really too difficult to write, go ahead) which is named testBug[BugId] (where bug id is the 6-digits id of the bug you are fixing).
  5. Add this new test to the AllTests test suite:
    1. if yoy simply add a test method in an existing TestCase, you won't have anything to do
    2. If you created a new TestCase class, add this class to the list of TestSuite in AllTests.xml
  6. Run this test locally (As a "JUnit plug-in test"), ensure it fails, so that you ensure it won't lie to you when it get green.
  7. Add a patch containing your test on the bug page.
  8. Get your test committed
    1. If you are a committer on JWT => Commit it
    2. If you are not a committer => A committer will commit it to the code, conforming to JWT DeveloperFAQ#Legal Stuff
  9. Once committed, your test will be run at each JWT build, you can get test reports for development builds on page [1]
  10. Make your fix in the "normal" plugin.
  11. Re-run the test, ensure it is now green.
  12. Attach your patch to the plugin on the bug page
  13. Get your contribution committed
    1. If you are a committer on JWT => Commit it
    2. If you are not a committer => A committer will commit it to the code, conforming to JWT DeveloperFAQ#Legal Stuff
  14. Have a look at next build's report, and ensure that the test case you added succeeded.

Collaborative Development process

The core idea is that what is committed has to fit in JWT on all counts : vision, architecture and legal aspects.

Here is a more detailed outline of how things are typically done :

  • first needs and requirements are discussed on the mailing list or on bugzilla(s), as well as whether it fits in the vision
  • then a technical solution is proposed, specified and discussed on bugzilla(s), as well as whether it fits in the architecture
  • then an implementation is proposed as a patch (or possibly a branch, to avoid if possible) and posted on the bugzilla
  • it is reviewed by other committers on the following points : requirements, technical points and whether it fits in JWT's architecture ; and by project leads on whether it also complies to Eclipse and JWT IP and other organisational requirements (CVS layout and naming, dependencies...)
  • finally, if it is approved by project leads, it is committed by a committer (the author if he is committer).

Obviously for small things like simple bug patches, a very simple approval is required. If it has only technical (and not vision or architectural) impacts, the approval of the person responsible for the code being patched might be enough.

And once a developer has comitted an initial codebase as specified in a given bugzilla, he can commit incremental improvements to it and only have to mention such improvements in this (open !) bugzilla's comments. More precisely, he doesn't need to write a new bugzilla for each and every commit he does! Once someone's in the process of developing a feature that has already been specified in the bugzilla, he can keep on committing until it's done, at the condition he mentions it on the bugzilla.

Once a new feature has been developed,

  • the author must document it in the wiki. If it allows to extend and customize JWT, it must be documented or linked in the dedicated wiki page. As much as possible, a sample and a tutorial should be written on the wiki (how to use it, or how to extend, depending on the case).
  • it is reviewed by fellow committers and project leads, who can ask for improvements or refactoring so as it better fits in the JWT architecture (CVS layout etc.), or better doc or samples
  • the bugzilla is closed !
  • at some point, it will be included in a release (usually the next one), and showcased in the release review slides and in the release news.

How to prepare a new Release

Project Management

Legal Process

Releasing JWT and the corresponding plugins (e.g. the Workflow Editor)

Merely trigger the right automated build in [JWT HIPP], for a mere integration build or to promote it also to Eclipse Simultaneous Release.

What follows has been OBSOLETED by the automated build

1. Preparing

  • Make sure the copyright/year information in the Java headers is up to date
  • Take care of Babel stuff: go here and set the update site URL for the new version. The new version should appear in the translator interface a day or two later.
  • tutorial_url and tutorial_path must be updated in the plugin*.properties
  • Remove unneccessary plugin dependencies using the Plugin.xml-editor
  • Make sure the description of the JWT extension points is up to date
  • Close finished Bugzilla tasks and move open ones to the next release (create bugzilla version tag for the next release if not already present - this can be done in the portal in the tools for all committers)
  • The remaining open bugzilla bugs can be seen here.
  • Update the internal documentation in all plugins such as the JWT-WE (e.g. README, abouttext.txt, about.html, the package.html files in each Java package...)
  • Make sure the internal version of the plugins is set to the new release version
  • The converter must be updated to the newest file format
  • Ensure that all keybindings for Eclipse commands (menu/toolbar) are set correctly
  • Make sure the licence information is valid (notice.html)
  • Also the development conventions and guidelines should be followed. Take care of that.
  • Run all existing tests (for transformations, workflow editor, etc.)
  • Update the release notes

2. Generating Packages

  • Generate new Javadocs for each component to be released
  • Generate a release package and a source package for JWT and corresponding plugins
  • Maybe create several packages for different purposes (more or less transformations, etc.)
  • Update the example processes of the workflow editor and create a ZIP archive
  • Sign all packages
  • Please consider the Automatic build information provided

3. Deploying

  • Tag the release state of the Plugins on the CVS as a new version (e.g. v070)
  • Archive old release (move files to "") and upload new release packages to the download server "" (in a new directory with subdirectories for plugins and documentation)
  • Update the links of archived and new downloads on the wiki download page ( Downloads) and related Wiki pages
  • Update the Eclipse JWT page (add an entry to the news section, adapt direct download link for the Workflow Editor and direct download link for documentation, update project pages, ...)
  • Adapt the feature in the JWT Eclipse Update Site for automatic download
  • Change the information in the portal about the successfull release and schedule resp. refine the date for the next release
  • Notify Mailing List and partners

Releasing the AgilPro LiMo/Simulator

  • update release notes
  • update tutorial
  • update javadoc
  • update howtos
  • update install informations
  • valid licence in installer?
  • valid update splashscreen?
  • copy emf model to simulator
  • convert sample processes
  • test installer for all operating system versions
  • SVN: branch, javadocs
  • CVS: tag version
  • mylyn: close finished bugs, move open ones to next release


Generating Packages

Signing the Packages

1. Using your favourite SSH application (such as Putty), log in to using your CVS committer credentials.

2. Move or copy the files to be signed to the Downloads Staging area. You cannot sign files anywhere else. The Staging Area is at /opt/public/download-staging.priv/, and it is structured like the downloads area. If you don't have a staging directory, or if you cannot access it, please contact webmaster.

3. Use the 'sign' command, as such: sign <file> <mail|nomail> [outputDir]

where file is the name of the ZIP or JAR file you want signed. Because signing is computationally intensive work, wildcards are not supported.

mail|nomail will allow you to receive an e-mail notice that signing is completed.

outputDir is optional: if specified, signed files will be placed in this directory. If omitted, the original file will be overwritten with the signed one.

4. When signing is complete, you can verify the signed JAR file with the following command (to verify ZIP files, unzip them first, then verify the JARs inside):

jarsigner -verify <file>

5. Move the signed files back to the downloads area, and delete any other files in the Staging Area.


Eclipse Maintenance Stuff

Putting Files on the Download Server

  • Old files should be moved to
    • ssh
    • mv ~/downloads/your/project/oldrelease/ /home/data/httpd/
  • Connect to using SCP/SFTP and upload the new files
  • Update the JWT Download Site
  • Update the main JWT site (news area, download area)

Updating the Wiki pages

Several wiki pages are speaking about the latest version.

All releases with their review slides are normally described here.

Updating the Web Site

Use Git to check out the Git repository of the JWT web site whose Git URL is : ssh:// (as said at #412184). See more information about working with Eclipse Git repositories at Git.

Update at least pages :

NB. if your really want to preview our changes before committing and pushing them to the server, see Configuring Eclipse to Edit your Website

Commit and push your changes to the server.

  • using Git command line client :

# get the latest changes before committing if any git pull # add all changes to be committed git add . # commit them locally git commit # push locally committed changes to the server git push

See more information about working with git at .

Finally, check your work at !

Adapting the Eclipse Update Site

In order to adapt the Eclipse update site you need to create a feature first. This shall include all plugins that will be deployed.

Creating the feature

You'll first need to create a new feature project via the "File -> New -> Other..." dialog.


Then, open the feature.xml to specify all your requirements. The name of the feature, who the provider is, etc. You should also specify the copyright and licensing information there, add the plugins you want to be part of the feature and then compute the dependencies. Afterwards you can go back to the overview page and go through the steps in the Exporting area.


First, synchronize your plugins with their versions in the workspace, specify the Build configuration and then Export the feature.


In this dialog you will be asked where to create this new feature. Since we want to create a new update-site it makes sense to select already the path of this update site. You can specify several options there and start the process of signing the JAR (if not happened already) and can then click on Finish.

Creating the update-site

The feature overview allows you also to create an update site project in the Publishing area. There you can open the update site map (site.xml) and specify the feature as well as system requirements. Finally, build the feature and your update-site will be finished.


Now all there is needed is that you upload your update-site to the Eclipse-server. Probably you'll have a directory structure as the following:



JWT & Eclipse

  • JWT mailing lists :
  • JWT Website :
  • JWT Forum:
  • friend projects : Eclipse SOA mailing list, SOA IWG

AgilPro & Augsburg

  • mailing lists for AgilPro and SEMPRO
  • As the SEMPRO tools build upon JWT, changes to the codebase has probably also effects on the codebase of SEMPRO. Therefore, communicate the changes to the SEMPRO mailing list.
  • SourceForge.Net AgilPro Announcement Forum
  • SourceForge.Net Wf-Codegen Announcement Forum
  • News at AgilPro Website


  • involved research projects mailing lists :
    • (SCOrWare,
    • (old JOnES mailing list, which bore OW2 PEtALS)
  • friend OW2 projects mailing lists :
    • (OW2 Nova Bonita)
    • (OW2 PEtALS)
    • (OW2 Frascati)
  • Scarbo news

Open Wide

  • EasySOA mailing list :

News sites

  • InfoQ

Automatic build

Automatic build description

See also

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