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From "Claus Ibsen (JIRA)" <>
Subject [jira] Commented: (CAMEL-522) Problem with scanning Jar files for Converters if application is loaded with webstart
Date Tue, 29 Jul 2008 17:42:00 GMT


Claus Ibsen commented on CAMEL-522:

Okay I think I got it without dependency to spring .jars

> Problem with scanning Jar files for Converters if application is loaded with webstart
> -------------------------------------------------------------------------------------
>                 Key: CAMEL-522
>                 URL:
>             Project: Apache Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 1.3.0, 1.4.0
>         Environment: Windows XP
>            Reporter: Andreas Kuhtz
>             Fix For: 1.5.0
>         Attachments: ResolverUtil.patch
> I've encountered a problem with the scanning of jar files with the @Converter annotation
if the Jars are loaded with the webstart classloader. Because the URL starts with _http:_
the conversion to a file fails in ResolverUtil. 
> I've attached a patch that uses an UrlResource if the url starts with _http:_ and this
works if the jar-resource has the version information added to the jar file in the JNLP-file
(like <jar href="camel-core-1.4-SNAPSHOT.jar"/>). But if the version is added separately
(like <jar href="activemq-core.jar" version="5.1.0"/>) it fails because the classloader
returns the name of the jar-file without the version information (like http://....../activemq-core.jar)
and this file does not exist. 
> I'm currently trying if it is possible to check whether the application is started via
webstart (there is a class Tool that should only exist in the webstart classloader) and in
this case I'll check if the filename of the jar-file is returned correctly. If yes maybe we
can provide another patch to get rid of the problem described above.

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