[jboss-user] [EJB/JBoss] - Re: Serializable no remote classloading

[ron.sigal@jboss.com]

The default behavior in AS 4.0.X was to use a "legacy" remote invoker, and the default in AS 4.2 is to use a Remoting invoker.  For a Remoting invoker, the ability to download classes over the network has to be enabled explicitly.  For EJB3 the configuration file is .../server/default/deploy/ejb3.deployer/META-INF/jboss-service.xml (substitute your configuration for "default"), and the relevant entry is


  |    <mbean code="org.jboss.remoting.transport.Connector"
  |           name="jboss.remoting:type=Connector,name=DefaultEjb3Connector,handler=ejb3">
  |       <depends>jboss.aop:service=AspectDeployer</depends>
  |       <attribute name="InvokerLocator">socket://${jboss.bind.address}:3873</attribute>
  |       <attribute name="Configuration">
  |          <handlers>
  |             <handler subsystem="AOP">org.jboss.aspects.remoting.AOPRemotingInvocationHandler</handler>
  |          </handlers>
  |       </attribute>
  |    </mbean>
  | 

If you add a "loaderport" parameter to the InvokerLocator, Remoting will create a "classloader server"   which, if a class cannot be found on the client side, will be contacted by the client side classloader.  E.g.,


  |    <mbean code="org.jboss.remoting.transport.Connector"
  |           name="jboss.remoting:type=Connector,name=DefaultEjb3Connector,handler=ejb3">
  |       <depends>jboss.aop:service=AspectDeployer</depends>
  |       <attribute name="InvokerLocator">socket://${jboss.bind.address}:3873/?loaderport=4873</attribute>
  |       <attribute name="Configuration">
  |          <handlers>
  |             <handler subsystem="AOP">org.jboss.aspects.remoting.AOPRemotingInvocationHandler</handler>
  |          </handlers>
  |       </attribute>
  |    </mbean>
  | 

will create a classloader server that listens on port ${jboss.bind.address}:4873.

For more discussion see Section "5.5. Marshalling" of the Remoting Guide (http://labs.jboss.com/jbossremoting/docs/guide/index.html).

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