[jboss-dev-forums] [Design of POJO Server] - ClassLoadingDeployer behavior

[scott.stark@jboss.org]

One issue I'm seeing with implementing a class loading deployer that would handle issues such a manifest Class-Paths, OSGI bundle headers, some custom class loader metadata is that this would conflict with a class loader specified at the bean deployer level. For example, 


  | <!-- A beans descriptor -->
  | <deployment xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  |             xsi:schemaLocation="urn:jboss:bean-deployer:2.0 bean-deployer_2_0.xsd"
  |             xmlns="urn:jboss:bean-deployer:2.0">
  |    <bean name="VFSClassLoader" class="org.jboss.vfs.classloading.VFSClassLoader">
  |       <constructor factoryClass="org.jboss.vfs.classloading.VFSClassLoaderFactory"
  |                    factoryMethod="newClassLoader">
  |          <parameter>${jbosstest.deploy.dir}</parameter>
  |          <parameter>
  |          	<array class="[Ljava.lang.String;" elementClass="java.lang.String">
  | 	         	<value>org.jboss.server.support.jar</value>
  |          	</array>
  |          	</parameter>
  |          <parameter><inject bean="MainDeployer" property="VFSFactory"/></parameter>
  |       </constructor>
  |    </bean>
  |    <bean name="TestBean" class="org.jboss.test.server.support.TestBeanImpl">
  |       <classloader><inject bean="VFSClassLoader"/></classloader>
  |       <property name="intProperty">1234</property>
  |       <property name="integerProperty">4321</property>
  |       <property name="stringProperty">string-x</property>
  |    </bean>
  | </deployment>
  | 

I guess that the BeanDeployer could indicate that beans were seen with ClassLoaderMetaData, but it still would not be know if this was an override, or a class loader that should be augmented with deployment manifest settings.

About the only thing I can think to do is have the ClassLoadingDeployer be responsible for the deployment context class loader, and the BeanDeployer could create a child class loader for any bean deployment local class loader.


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