Maven Multi-Module Project in RTC Source Control

I'm also interested !

What are the best practices for sharing a Maven project/module ?

Can you provide more details about the NPE? Ideally file it as a bug against RTC, but if it's easier you can just post it here and I'll do so.

For running Maven builds, you can create a Maven build definition, pointing it at the main POM. I'd be interested to hear whether this works for multi-module projects too, and your thoughts on how we can improve our Maven support.

I'd be interested to hear whether this works for multi-module projects too, and your thoughts on how we can improve our Maven support.

Nick, if you want to see a perfect integration between Maven and a build engine then take a look at Hudson.

I found a solution

In a standard maven multi-module project, we have a hierarchical project layout, module directories are in the parent directory

The solution is to place module directories on the same level as the parent.

So parent pom.xml must contains :

<modules>
<module>../module1</module>
<module>../module2</module>
</modules>

and modules pom.xml :

<parent>
<artifactId>artifact</artifactId>
<groupId>group</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent</relativePath>
</parent>

And that's it, Jazz SCM can now store your maven modules as individual component

Thanks for clarifying. It still shouldn't fail with an NPE if you have some other organization though. Can you provide details about that failure?

As example, this is the NPE thrown:


<?xml version="1.0" encoding="UTF-8"?>
<error-report locale="en_US" product-bundle-version="8.0.0.v20101115" product-id="com.ibm.rational.rsa4ws.product.v80.ide" product-name="Rational Software Architect for WebSphere Software" time="Fri Feb 04 14:14:41 GYT 2011" version="1.2">
<about Version="8.0.1" mapping0="$BUILD_ID" mapping1="8.0.1"/>
<platform platform-arch="x86" platform-name="Windows XP" platform-version="5.1 build 2600 Service Pack 3"/>
<status code="2" message="An internal error occurred during: "Sharing Projects"." plugin-id="org.eclipse.core.jobs" plugin-version="3.5.1.R36x_v20100824" severity="4">
<exception type="java.lang.NullPointerException">
<trace class="org.eclipse.core.runtime.Path" method="<init>"/>
<trace class="com.ibm.team.filesystem.client.internal.MetadataUpdateJob$UpdateRequest" method="getLockPath"/>
<trace class="com.ibm.team.filesystem.client.internal.MetadataUpdateJob" method="queue"/>
<trace class="com.ibm.team.filesystem.client.internal.MetadataUpdateJob" method="queueUpdate"/>
<trace class="com.ibm.team.filesystem.client.internal.ManagedFileStore" method="requestBackgroundMetadataUpdate"/>
<trace class="com.ibm.team.filesystem.client.internal.ManagedFileStore" method="mkdir"/>
<trace class="org.eclipse.core.internal.resources.ResourceTree" method="moveProjectContent"/>
<trace class="org.eclipse.core.internal.resources.ResourceTree" method="standardMoveProject"/>
<trace class="org.eclipse.core.internal.resources.Project" method="move"/>
<trace class="com.ibm.team.filesystem.rcp.core.internal.resources.ApoRepositoryProvider" method="configureProject"/>
<trace class="org.eclipse.team.core.RepositoryProvider" method="configure"/>
<trace class="org.eclipse.team.core.RepositoryProvider" method="map"/>
<trace class="com.ibm.team.filesystem.rcp.core.internal.resources.ApoRepositoryProvider" method="map"/>
<trace class="com.ibm.team.filesystem.rcp.core.internal.resources.ApoRepositoryProvider" method="map"/>
<trace class="com.ibm.team.internal.filesystem.ui.wizards.sharing.SharingWizardInput" method="performMap"/>
<trace class="com.ibm.team.internal.filesystem.ui.wizards.sharing.SharingWizardInput" method="access$1"/>
<trace class="com.ibm.team.internal.filesystem.ui.wizards.sharing.SharingWizardInput$2" method="run"/>
<trace class="org.eclipse.core.internal.resources.Workspace" method="run"/>
<trace class="org.eclipse.core.internal.resources.Workspace" method="run"/>
<trace class="com.ibm.team.internal.filesystem.ui.wizards.sharing.SharingWizardInput" method="autoconnectProjects"/>
<trace class="com.ibm.team.internal.filesystem.ui.wizards.sharing.SharingWizard$2" method="filesystemRun"/>
<trace class="com.ibm.team.filesystem.ui.operations.FileSystemUIOperation" method="repositoryRun"/>
<trace class="com.ibm.team.repository.rcp.ui.operations.RepositoryOperation" method="run"/>
<trace class="com.ibm.team.repository.rcp.ui.operations.JobRunner" method="run"/>
<trace class="com.ibm.team.repository.rcp.ui.operations.JobRunner$1" method="run"/>
<trace class="org.eclipse.core.internal.jobs.Worker" method="run"/>
</exception>
</status>
</error-report>

Thanks Lucas. This issue has been fixed in 3.0.
For details, see 126332: NPEs occur if sandbox nested within an Eclipse project.