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Hook into System.loadLibrary or Bundle.findEntry [message #510981]

Fri, 29 January 2010 12:34

Philipp Kursawe

Messages: 135
Registered: July 2009

Senior Member

Hello,

is it possible to hook into the way Equinox loads native libraries? I
think it would be enough for me to hook into the find of the native
library. I would also not like to use hooks, that I have to specify at
the command line but rather one that I could add to the framework during
runtime.

Thanks,
Phil

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Re: Hook into System.loadLibrary or Bundle.findEntry [message #511063 is a reply to message #510981]

Fri, 29 January 2010 16:39

Thomas Watson

Messages: 503
Registered: July 2009

Senior Member

There are hooks in Equinox for this:

org.eclipse.osgi.baseadaptor.hooks.ClassLoadingHook.findLibr ary(BaseData, String) lets you find a requested library path

org.eclipse.osgi.baseadaptor.hooks.BundleFileWrapperFactoryH ook.wrapBundleFile(BundleFile, Object, BaseData, boolean) lets you wrapper a BundleFile and intercept calls to BundleFile.getEntry which are called when Bundle.findEntries is called.

But I am not sure I understand your statement "I would also not like to use hooks, that I have to specify at the command line but rather one that I could add to the framework during runtime."

If you have a framework extension that contains hook implementations (has a hookconfigurators.properties file) then p2 will install and configure it into the framework automatically. There should be no need to add an command line options.

Tom.

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Re: Hook into System.loadLibrary or Bundle.findEntry [message #511199 is a reply to message #511063]

Sat, 30 January 2010 22:55

Philipp Kursawe

Messages: 135
Registered: July 2009

Senior Member

Thanks Tom for your swift response,

> But I am not sure I understand your statement "I would also not like to
> use hooks, that I have to specify at the command line but rather one
> that I could add to the framework during runtime."
It means that I would not like to specify command line params to get the
hook activated. Thats what I would need to do, as I read on the hooks
wiki page.
>
> If you have a framework extension that contains hook implementations
> (has a hookconfigurators.properties file) then p2 will install and
> configure it into the framework automatically. There should be no need
> to add an command line options.
And what if I will not use p2? Could I also not simply use a fragement
bundle for the system bundle and implement my hook there?

Phil

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