Thanks Tom for the confirmation.
Tim.
On Jun 8, 2011, at 6:25 AM, Thomas Watson wrote:
Hi Tim,
You are correct, the resolver hooks are not called when reifying the bundle
wiring. Instead we reify the wires exactly as they were when the framework was
shutdown. No resolve process is done in this process. The assumption is that
the resolver hooks were present when the framework shutdown and the resolution
state was persisted in the exact way the resolver hooks want when the framework
is restarted. It is the responsibility of the hook register to determine if the
wiring is not consistent with what they want when the register their hooks. If
the wiring is incorrect then a refresh bundles operation must be performed to
re-resolve the bundles with the hooks present.
This kind of thing is required regardless of the cached results since OSGi
decided to build resolver hooks on the service layer on top of the module
layer. In Equinox I imagine a resolver hook implementation would want to store
the resolution timestamp on shutdown and do a check that the resolution
timestamp has not changed when they register their hooks (i.e. check the
results from
org.eclipse.osgi.service.resolver.PlatformAdmin.getState(false).getTimeStamp()).
If the timestamp has changed since the hook was unregistered then a refresh is
needed. Also see https://bugs.eclipse.org/bugs/show_bug.cgi?id=343020 for a
related discussion for the region digraph implementation in Equinox.
Tom
<graycol.gif>Tim Diekmann ---06/07/2011 04:35:00 PM---Hi,
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Tim Diekmann <[email protected]<mailto:[email protected]>>
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06/07/2011 04:35 PM
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[equinox-dev] ResolverHook on startup
________________________________
Hi,
I have a Equinox implementation specific question regarding persistent wiring
and ResolverHooks.
When Equinox reifies the bundle wiring upon startup, does it call the
ResolverHookFactoryService implementations? I would assume the hooks would need
to be installed from the 'outside' or else the factories would not be
registered by the time the framework rebuilds/reifies the bundle wiring state.
My current assumption is that ResolverHooks are not called on startup of
Equinox for persistent wiring.
Can someone confirm?
Thanks,
Tim.
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