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From "David Jencks (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-3288) NPE when component exposed as a service with servicefactory = true
Date Mon, 30 Jan 2012 03:33:10 GMT

    [ https://issues.apache.org/jira/browse/FELIX-3288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195921#comment-13195921

David Jencks commented on FELIX-3288:

The patch looks correct to me.  Is there any chance of compiling with java 5 and using @Override
to catch stuff like this?
> NPE when component exposed as a service with servicefactory = true
> ------------------------------------------------------------------
>                 Key: FELIX-3288
>                 URL: https://issues.apache.org/jira/browse/FELIX-3288
>             Project: Felix
>          Issue Type: Bug
>          Components: Declarative Services (SCR)
>    Affects Versions:  scr-1.6.0
>            Reporter: Jarek Gawor
>         Attachments: FELIX-3288.patch
> I have a component that is exposed as a service and is also configured with servicefactory
= true. I see the following NPE when shutting the framework:
> java.lang.NullPointerException
> 	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.disposeImplementationObject(ImmediateComponentManager.java:252)
> 	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.deleteComponent(ImmediateComponentManager.java:135)
> 	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Satisfied.deactivate(AbstractComponentManager.java:1075)
> 	at org.apache.felix.scr.impl.manager.AbstractComponentManager.disposeInternal(AbstractComponentManager.java:357)
> 	at org.apache.felix.scr.impl.manager.AbstractComponentManager.dispose(AbstractComponentManager.java:196)
> 	at org.apache.felix.scr.impl.config.ConfiguredComponentHolder.disposeComponents(ConfiguredComponentHolder.java:299)
> 	at org.apache.felix.scr.impl.BundleComponentActivator.dispose(BundleComponentActivator.java:319)
> 	at org.apache.felix.scr.impl.Activator.disposeComponents(Activator.java:340)
> 	at org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:207)
> Since the component is configured with servicefactory = true, ServiceFactoryComponentManager
is used to manage the object. ServiceFactoryComponentManager overrides the createComponent()
method from ImmediateComponentManager. ServiceFactoryComponentManager also intended (I think)
to override the corresponding deleteComponent() method from ImmediateComponentManager. However,
the signature of the deleteComponent() in ImmediateComponentManager has changed a bit so the
override doesn't work anymore. So that's what I think is causing the problem in this case.

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