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Bundle.findEntries doesn't find files when deployed as jar [message #790115]

Fri, 03 February 2012 16:01

Eclipse User

Hi there,

I'm trying to deploy our self made development platform as a Java-Library consisting of a bunch of jars. Therefore i created a new plugin, added two extensions to org.eclipse.jdt.core and org.eclipse.jdt.ui for Classpath-Entry specification and so far that works fine.

Now the plugin contains our custom code as jars in a directory called 'lib' .
Now i want to reference those files in my ClasspathEntry. To find the .jars (their actual name changes when the jars are updated) i'm using Bundle#findEntries(".", "*.jar", true)

In development mode this works fine, but after deployment through a p2-update site, findEntries won't find anything (null is returned). So far, i don't know if it happens to be the permissions that i do not have (but i can't find anything that related to that) or if findEntries can't find the jars because they are contained in the deployed jar.

Could someone push me into the right direction where to look for a solution? It's very cumbersome to debug this because the error only shows up in a production environment.

Regards
Hendrik

[Updated on: Fri, 03 February 2012 16:32] by Moderator

Re: Bundle.findEntries doesn't find Entries when plugin is deployed [message #790131 is a reply to message #790115]

Fri, 03 February 2012 16:32

Eclipse User

After consulting the method Bundle.hasPermission() it turns out, that the bundle has the permission to call Bundle.findEntries(). I more or less expected this, since i couldn't find any reference to permissions in my eclipse and java installation.
So this means, Bundle.findEntries is not capable of finding files inside the bundle.jar.

That leads me to my question: How can i deploy a plugin as a directory? I tried several options using the export wizard but that didn't work. Maybe i can try to resolve the files through a manipulation of the Path element. I'll try that tomorrow. Maybe someone comes up with a better solution?

Re: Bundle.findEntries doesn't find files when deployed as jar [message #790148 is a reply to message #790115]

Fri, 03 February 2012 17:08

Eclipse User

Quote:

Now the plugin contains our custom code as jars in a directory called 'lib' .
Now i want to reference those files in my ClasspathEntry. To find the .jars (their actual name changes when the jars are updated) i'm using Bundle#findEntries(".", "*.jar", true)

I think you should use "/" as the base path to search in. The "." likely works in development mode because your bundle is be loaded from a project (directory) and the use of File allows for '.' to be used. In production it sounds like your bundles are jar'ed bundles and the use of ZipFile is not finding '.' as the root.

The javadoc for findEntries states: A path value of "/" indicates the root of this bundle.

Re: Bundle.findEntries doesn't find files when deployed as jar [message #790158 is a reply to message #790148]

Fri, 03 February 2012 17:25

Eclipse User

Yeah. Also found that out a couple of minutes ago. Anyway thanks for the response.

At the end i ended up, at the point, that i did have urls of the form jar:file:/Eclipse/plugin.jar!/lib/myjar.jar - after clipping jar:file: from the url (the path has to be absolute to be a classpathentry) i can add my library as an classpathentry but the jars cannot be resolved, because they are inside a jar.

Now i'm extracting my jars into a temporary directory and reference them from there. That works quite fine and i'm able to update the jars now and then when i deploy a new version of the plugin.

[Updated on: Fri, 03 February 2012 17:26] by Moderator

Re: Bundle.findEntries doesn't find files when deployed as jar [message #791857 is a reply to message #790158]

Mon, 06 February 2012 05:38

Eclipse User

Hello

this might help: Using

Eclipse-BundleShape: dir

in your MANIFEST.MF will make Eclipse export the plugin as a directory (and not as a jar file). You can then access the files in the file sytem.

Greetings
Christoph

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