Re: [equinox-dev] NPE from RegistryStrategyOSGI.onStop()

[Oleg Besedin <obesedin@xxxxxxxxxx>]

Hi Jason,
The quick answer is that you need to
stop your custom registry before org.eclipse.equinox.registry bundle is
stopped.

Normally bundles are stopped in the
reverse order of dependency, i.e., if a bundle MyBundle depends on the
org.eclipse.equinox.registry, then MyBundle is stopped first on shutdown,
then org.eclipse.equinox.registry. So, normally, you could put the code
to stop your custom registry into MyBundle's activator#stop().

I *guess* that putting inappropriate
bundle start levels could break the shutdown order.

Thanks,
Oleg

"Jason Hao" <jason.hao@xxxxxxxxx>
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10/20/2006 03:52 AM

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Subject	[equinox-dev] NPE from RegistryStrategyOSGI.onStop()

Hi all,

I'm working on a project which is based on OSGi and equinox. The project
also includes equinox extension registry bundle. Since my extensions are
defined in files which are not in side the bundles, I need to load these
extensions into registry by IExtensionRegistry.addContribution() method.
And addContribution() method needs the master token which is under control
of equinox registry bundle and I can't get it, so I have to create my registry
instead of using the default registry. Here are what I have done. 

1.        Add
"-Declipse.createRegistry=false" into VM arguments. This will
disable the default registry.
2.        Create
my extension registry component and register it with declarative service
spec. In the activate() method I creat my OSGi strategy and registry. In
the deactivate() method I call IExtensionRegistry.stop() method to stop
the registry.
3.        Start
my application and the registry works well.
4.        Shutdown
the OSGi framework by typing "shutdown" command in the console.
org.eclipse.core.internal.registry.osgi.Activator.stop () method is called
and the bundle context is set to null. Then my registry deactivate() method
is called. I got java.lang.NullPointerException from org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.onStop(RegistryStrategyOSGI.java
:204) since the bundle context is null.
I wonder if there's any way I can work around. Thanks.

-- 
Best Regards,

Jason Hao _______________________________________________
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