Getting Started Developing Jetspeed


This section is for developers who want to work on Jetspeed 2 itself, not necessarily for portlet developers.

Setting up a development environment

There are many different ways to set up a development environment that will enable you to effectively develop Jetspeed 2. This example uses Eclipse, Tomcat 5, and MySQL.


Download and install these packages:

Setting up Eclipse

  1. Dowload Eclipse from Any Latest Release version from 3.0 onward will probably be OK. If you have problems with any of the plugins, make sure they support the version of Eclipse you downloaded.

  2. Install Eclipse plugins:

At a minumum you will need to install the Mevenide and Checkstyle plugins. Mevenide is used for working with Mavenized projects. Checkstyle is a Java programming style enforcer.

The easiest way to install plugins is through the Eclipse Update Manager. Choose Help > Software Updates > Find and Install. In the next dialog, choose "Seach for new features to install" and then "Add Update Site".

Name: Mevenide
Update Manager URL:

If you see a java.lang.NoSuchMethodError error with Mevenide during launch, use the following URL for the Update Manager

Unfortunately, installing the Checkstyle plugin is a manual process. Start by downloading the plugin from the Checkstyle plugin site. Next, unzip the download and copy the directory to your eclipse/plugins directory. Restart Eclipse if it's running.

You may also want to try Veloeclipse, a plugin for editing Velocity templates. It's available through the Eclipse Update Manager. Use the steps described above for Mevenide, but use the following values.

Name: Veloeclipse
Update Manager URL:

Some developers also use XMLBuddy.

The Sysdeo Tomcat plugin is also handy for controlling Tomcat from Eclipse This is a manual install.

There are more Eclipse plugins available at

Note on the Eclipse workspace: If you are using Windows, set your Eclipse workspace (in the annoying window that opens up every time you launch Eclipse until you finally notice the checkbox) such that the directory path does not contain any spaces. You will have trouble building if the path to your workspace contains spaces.

Setting up Tomcat

Download and install Tomcat from

Tomcat 4 and 5 are both supported. Versions of Tomcat older than 5.0.28 require a JAASRealm patch that will be automatically applied by Maven during the build. Refer to for more information. Otherwise, Tomcat 4 or 5 are equally good choices.

Checking out Jetspeed

The first thing you need to do is add a CVS respository: Window > Open Perspective > CVS Repository Exploring

Make sure the "CVS Repositories" tab is selected and right-click (Control-click on the Mac) that pane. Choose New > Repository Location... in the context menu. Alternatively, you can click the "Add CVS Repository" button to the right of the tabs.

Enter the following information in the Add CVS Repository dialog:
Repository path: /home/cvspublic
User: anoncvs
Leave Password empty.

The connection type is pserver, using the default port.

You can then drill down to the jakarta-jetspeed-2 module from HEAD.

Right-click (control-click on the Mac) on the jakarta-jetspeed-2 module and choose Check Out As... from the context menu.

Select "Check out as a project in the workspace" and click the Finish button.

Now switch from the CVS perspective to the Java perspective (Window > Open Perspective; you may need to choose Other... and select Java from the resulting dialog).

Presto! You have a checkout of jakarta-jetspeed-2. You'll probably get a ton of errors. Luckily they're all variations on the same theme: Unbound classpath variable: MAVEN_REPO/blah/blah/blah.

Before we go any further, make sure that the Maven settings are correct in Eclipse. Open the Eclipse Preferences dialog and select the Maven > Locations. In the author's experience on Mac OS X, it was neccessary to enter the Java Home path as a URL: file:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home

Maven Home will probably be something like:

Maven Local Home:

Maven Local Repository:

OK -- now we're ready to fix those MAVEN_REPO errors. In the Preferences window, click Java > Build Path > Classpath Variables. Click the "New..." button and enter the following:

Path: the path to your Maven Local Repositry, i.e. /your/home/.maven/repository

Click OK until you've saved your preferences and the Prefences window is closed.

The build errors should disappear. Right-click (control-click) the project name "jakarta-jetspeed-2" and choose Maven > Run Maven... . In the text field to the left of the "Choose..." button, enter allClean allBuild and click "Run".

That's it, you're building Jetspeed! Any build problems from here on are left as an exercise to the reader. :)

Jetspeed2/DevelopingJetspeed2 (last edited 2009-09-20 23:46:46 by localhost)