Thanks!
Paul.
On Sep 2, 2009, at 3:28 PM, Sahoo wrote:
> This is NOT a bug. By design, WebappClassLoader does not honor
> delegate flag for any *javax* packages. The list of such non-
> overridable package patterns is defined statically on
> WebappClassLoader like this:
>
> /**
> * Set of package names which are not allowed to be loaded from a
> webapp
> * class loader without delegating first.
> */
> private static final String[] packageTriggers = {
> "javax", // Java extensions
> // START PE 4985680
> "sun", // Sun classes
> // END PE 4985680
> "org.xml.sax", // SAX 1 & 2
> "org.w3c.dom", // DOM 1 & 2
> "org.apache.taglibs.standard", // JSTL (Java EE 5)
> "com.sun.faces", // JSF (Java EE 5)
> "org.apache.commons.logging" // Commons logging
> };
>
>
> You can override this behavior by setting a system property like this:
> com.sun.enterprise.overrideablejavaxpackages=javax.ws.rs.core
>
> Thanks,
> Sahoo
>
> Jakub Podlesak wrote:
>> Hi all,
>>
>> Paul Sandoz has hit a strange issue with classloading in GlassFish
>> V3,
>> and i am curious, if it is a bug.
>>
>> Attached is a small maven based project, which builds a war including
>> [WEB-INF/lib/jsr311-api-1.1-ea.jar]
>> The web application then has a servlet, which tries to print out,
>> which classloader was used to load [javax.ws.rs.core.Application],
>> a class which is included in the above mentioned jar.
>>
>> The same class is then included also in the
>> [glassfish/modules/jsr311-api.jar]
>> archive, which is part of GlassFishV3 (latest nightly).
>>
>> Now, even if the class-loader delegate option
>> <class-loader delegate="false"/>
>> is set to false, the servlet shows, the
>> [javax.ws.rs.core.Application]
>> has been loaded from the
>> [glassfish/modules/jsr311-api.jar] instead from the jar included
>> in the war file:
>>
>> [#|2009-09-02T14:06:20.499+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;|FIND:
>> javax.ws.rs.core.Application javax/ws/rs/core/Application.class|#]
>>
>> [#|2009-09-02T14:06:20.499+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| Class loader of class|#]
>>
>> [#|2009-09-02T14:06:20.500+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| bundle://113.0:1/javax/ws/rs/
>> core/Application.class|#]
>>
>> [#|2009-09-02T14:06:20.500+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| Context class loader|#]
>>
>> [#|2009-09-02T14:06:20.502+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| jar:file:/export/home/japod/
>> test/glassfishv3/glassfish/domains/domain1/applications/
>> classloading311/WEB-INF/lib/jsr311-api-1.1-ea.jar!/javax/ws/rs/core/
>> Application.class|#]
>>
>> [#|2009-09-02T14:06:20.502+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| bundle://113.0:1/javax/ws/rs/
>> core/Application.class|#]
>>
>> [#|2009-09-02T14:06:20.506+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;|FIND:
>> javax.ws.rs.ApplicationPath javax/ws/rs/ApplicationPath.class|#]
>>
>> [#|2009-09-02T14:06:20.506+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| Class loader of class|#]
>>
>> [#|2009-09-02T14:06:20.507+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| jar:file:/export/home/japod/
>> test/glassfishv3/glassfish/domains/domain1/applications/
>> classloading311/WEB-INF/lib/jsr311-api-1.1-ea.jar!/javax/ws/rs/
>> ApplicationPath.class|#]
>>
>> [#|2009-09-02T14:06:20.507+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| Context class loader|#]
>>
>> [#|2009-09-02T14:06:20.508+0200|INFO|glassfish|null|
>> _ThreadID=35;_ThreadName=Thread-2;| jar:file:/export/home/japod/
>> test/glassfishv3/glassfish/domains/domain1/applications/
>> classloading311/WEB-INF/lib/jsr311-api-1.1-ea.jar!/javax/ws/rs/
>> ApplicationPath.class|#]
>>
>>
>> The corresponding find method is as follows:
>>
>> private void find(Class c) {
>> try {
>> String path = c.getName().replace(".", "/") + ".class";
>> System.out.println("FIND: " + c.getName() + " " + path);
>>
>> System.out.println(" Class loader of class");
>> Enumeration<URL> e =
>> c.getClassLoader().getResources(path);
>> while (e.hasMoreElements()) {
>> System.out.println(" " +
>> e.nextElement().toExternalForm());
>> }
>>
>> System.out.println(" Context class loader");
>> e =
>> Thread.currentThread().getContextClassLoader().getResources(path);
>> while (e.hasMoreElements()) {
>> System.out.println(" " +
>> e.nextElement().toExternalForm());
>> }
>>
>> } catch (Exception e) {
>> e.printStackTrace();
>> }
>> }
>>
>>
>> To reproduce this, just build the war file, deploy it, and hit: http://localhost:8080/classloading311/NewServlet
>> you should then see the statements in the [glassfish/domanins/
>> domain/logs/server.log] file.
>>
>> Could anybody explain what is wrong?
>>
>> Thanks,
>>
>> ~Jakub
>>
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>>
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