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https://issues.apache.org/jira/browse/DISCOVERY-13?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simone Tripodi resolved DISCOVERY-13.
-------------------------------------
Resolution: Fixed
fixed on trunk, see DiscoverClasses r1090700 for review, thanks Seb for
reviewing!
> Problem with Oracle JVM classLoader
> -----------------------------------
>
> Key: DISCOVERY-13
> URL: https://issues.apache.org/jira/browse/DISCOVERY-13
> Project: Commons Discovery
> Issue Type: Improvement
> Affects Versions: 0.2, 0.4
> Environment: Oracle Java stored procedure (oracle versions 8i -> 11g)
> Any OS
> Reporter: Leo Blumencweig
> Assignee: Simone Tripodi
> Priority: Minor
> Fix For: 0.4, 0.2
>
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> First of all, excuse my bad english (I'm an spanish speaker)
> Starting in version 8i, Oracle provides an embedded JVM inside th databases,
> in order to develop a stored procedure inJava language, later to be invoked
> via PL/SQL.
> Saddly, the JVM has some quirks, for example an somehow brain-damaged
> classLoader (oracle.aurora.rdbms.OracleClassLoader).
> This JVM stores the classes inside table objects (very reasonable).
> This leads to some problem: the resources haves some strange URL (example:
> jserver:/resource/schema/NAME_OF_THE_SCHEMA/ar.com.menhir.config.properties).
> It will be not problema at all except because it's brain damage insist in
> telling that the above URL works only with RESOURCES and not with CLASSES!!
> for example, the following example
> private static void getData ( ClassLoader cl , String str ){
> System.out.println(str +".class" + "->
> "+cl.getResource(str+".class"));
> System.out.println(str +".class" + "->
> "+ClassLoader.getSystemResource(str+".class"));
> }
> ...
> getData(Test.class.getClassLoader(),"ar.com.menhir.wstest.Test");
> ...
> gives this 2 results:
> with normal classLoader ( sun.misc.Launcher$AppClassLoader)
> ar/com/menhir/wstest/Test.class->
> file:/C:/Users/LeoB/workspace2/prueba/bin/ar/com/menhir/wstest/Test.class
> ar/com/menhir/wstest/Test.class->
> file:/C:/Users/LeoB/workspace2/prueba/bin/ar/com/menhir/wstest/Test.class
> with oracle classLoader (oracle.aurora.rdbms.OracleClassLoader)
> ar/com/menhir/wstest/Test.class-> null
> ar/com/menhir/wstest/Test.class-> null
> The problem arises in
> org.apache.commons.discovery.resource.classes.DiscoverClasses, where the line
> 60
> final String resourceName = className.replace('.','/') + ".class";
> points to a nonexistente resource.
> my workaround was to hack this class with the following:
> final String resourceName =
> ar.com.menhir.oracle.resources.Utils.getResourcePrefix(className).replace('.','/')
> + ".class";
> where getResourcePrefix gets the correct prefix for this class.
> You must note that this is a somehow brutal way of solving. I'm interested in
> contribute with the wright way, but I'm not very sure of where to start.
> Could you please help me?
> Thank you
> Leo Blumencweig
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