Booting up JBoss CL in VDF

[wolfc]

This is mainly a thread targetted at myself.

Once more I'm booting up VDF in a component and I'm encountering known issues with jboss-cl. So this is going to be a step-by-step guide for booting it up.

So when do I need jboss-cl?

java.lang.IllegalStateException: ClassLoader has not been set
    at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentUnit.getClassLoader(AbstractDeploymentUnit.java:154)
    at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataFactoryVisitor.addBeanComponent(BeanMetaDataFactoryVisitor.java:60)
    at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataFactoryVisitor.deploy(BeanMetaDataFactoryVisitor.java:126)
    ... 43 more

An easy work-around is to install a SimpleClassLoaderDeployer which throws everything on the TCCL.

http://viewvc.jboss.org/cgi-bin/viewvc.cgi/jbossas/projects/ejb3/trunk/transactions/src/test/java/org/jboss/ejb3/test/tx/common/SimpleClassLoaderDeployer.java?revision=80742&view=markup

But I want the real thing, so deploy bootstrap/classloader.xml. And install the real ClassLoaderDeployer:

<bean name="ClassLoaderDeployer" class="org.jboss.deployers.plugins.classloading.AbstractLevelClassLoaderSystemDeployer">
   <property name="classLoading"><inject bean="ClassLoading"/></property>
   <property name="system"><inject bean="ClassLoaderSystem"/></property>
</bean>

[wolfc]

Next stop is a shortcoming in AbstractLevelClassLoaderSystemDeployer:

java.lang.NullPointerException
    at org.jboss.deployers.plugins.classloading.AbstractLevelClassLoaderSystemDeployer.createClassLoader(AbstractLevelClassLoaderSystemDeployer.java:111)
    at org.jboss.deployers.structure.spi.helpers.AbstractDeploymentContext.createClassLoader(AbstractDeploymentContext.java:568)
    ... 41 more

Basically you must have a Module attachment.

This one comes from an AbstractClassLoaderDescribeDeployer of which we have one called VFSClassLoaderDescribeDeployer.

So:

<bean name="ClassLoaderDescribeDeployer" class="org.jboss.deployers.vfs.plugins.classloader.VFSClassLoaderDescribeDeployer">
   <property name="classLoading"><inject bean="ClassLoading"/></property>
</bean>

[wolfc]

How do I delete this post?

Message was edited by: Carlo de Wolf

[wolfc]

But to create the Module we must have the associated metadata:

java.lang.IllegalArgumentException: Null classLoading metadata
    at org.jboss.classloading.spi.dependency.helpers.ClassLoadingMetaDataModule.determineName(ClassLoadingMetaDataModule.java:56)
    at org.jboss.classloading.spi.dependency.helpers.ClassLoadingMetaDataModule.<init>(ClassLoadingMetaDataModule.java:82)
    at org.jboss.classloading.spi.dependency.policy.ClassLoaderPolicyModule.<init>(ClassLoaderPolicyModule.java:77)
    at org.jboss.deployers.plugins.classloading.AbstractDeploymentClassLoaderPolicyModule.<init>(AbstractDeploymentClassLoaderPolicyModule.java:120)
    at org.jboss.deployers.vfs.plugins.classloader.VFSDeploymentClassLoaderPolicyModule.<init>(VFSDeploymentClassLoaderPolicyModule.java:72)
    at org.jboss.deployers.vfs.plugins.classloader.VFSClassLoaderDescribeDeployer.createModule(VFSClassLoaderDescribeDeployer.java:40)

Which for the moment we'll provide with the ClassLoadingDefaultDeployer:

<bean name="ClassLoadingDefaultDeployer" class="org.jboss.deployers.plugins.classloading.ClassLoadingDefaultDeployer">
   <property name="defaultMetaData">
      <classloading xmlns="urn:jboss:classloading:1.0" export-all="NON_EMPTY" import-all="true"/>
   </property>
</bean>

And voila VDF with JBoss CL.

Note that parsing classloading metadata is disabled in this setup.