[jira] Updated: (GERONIMO-5744) bundle urls and 3rd party libraries

["Jarek Gawor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GERONIMO-5744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jarek Gawor updated GERONIMO-5744:
----------------------------------

    Attachment: GERONIMO-5744.patch

Proposed patch for this issue. The patch uses Equinox's classloader hook to return a custom classloader that 1) uses Equinox's URLConversion service to translate "bundle" urls into "jar" urls, 2) extends URLClassLoader class - therefore allows applications that assume TCCL to be a URLClassLoader to still run ok (potentially) and 3) supports searching for META-INF/ resources in statically wired bundles.


> bundle urls and 3rd party libraries
> -----------------------------------
>
>                 Key: GERONIMO-5744
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-5744
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: deployment
>    Affects Versions: 3.0-M2
>            Reporter: Jarek Gawor
>         Attachments: GERONIMO-5744.patch
>
>
> Resource lookup in Geronimo 3.0 returns "bundle" type of urls. However, a lot of Geronimo code and a number of third party libraries assumes that urls returned by resource lookup return "jar" or "file" type of urls. Because of this difference a lot of applications might not work properly on Geronimo 3.0. The Geronimo specific code has mostly been updated to use OSGi-friendly ways to look for resources. However, we can't expect every 3rd party library to be updated to be OSGi friendly. So we might need a solution that can return "jar" or "file" urls that works with most libraries.
> One possible solution is to use the BundleResourceClassLoader in the xbean-bundleutils project (currently used in the OpenJPA plugin). That solution could be enhanced with Equinox-specific extension (URLConverter service) that can convert "bundle" urls directly into "jar" or "file" urls (using the jars in its bundle cache).

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