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Posted to users@tomcat.apache.org by kr...@dossier.no on 2009/06/30 09:12:56 UTC
jar loading in folder web-inf/lib/folder/*.jar
HI,
Loading of jar files under WEB-INF/lib/a_foolder/*.jar wont work. On JBoss
5.0.1GA this works fine but
The tomcat class loader cant load thease files.,
Thease jar files (WEB-INF/lib/a_foolder/*.jar) is referenced from the
main.jar file (WEB-INF/lib/main.jar) manifest:
WEB-INF/lib/main.jar/META-INF/MANIFEST.MF:
/WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
/a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
I have also tried with prefix without any success,
WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
WEB-FIN/lib/a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
Dosnt tomcat support loading of jar libs within a folder in WEB-INF/lib ?
- Karan
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Re: jar loading in folder web-inf/lib/folder/*.jar
Posted by Daniel Henrique Alves Lima <em...@yahoo.com.br>.
Karan, if you really want/need this, try to:
A) build a.jar an place a start up servlet into it (or any class
loaded/executed when you application starts). Change Classpath entry (in
the manifest of a.jar) to include mylib/b.jar. Put a.jar under WEB/lib;
B) build b.jar and put it under WEB/lib/mydir/b.jar. Be sure that
Classpath entry (of a.jar's manifest) includes mydir/b.jar;
Start your app.
On Tue, 2009-06-30 at 14:13 -0300, Daniel Henrique Alves Lima wrote:
> On Tue, 2009-06-30 at 11:59 -0400, Christopher Schultz wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Karan,
> >
> > On 6/30/2009 3:12 AM, kr@dossier.no wrote:
> > > Loading of jar files under WEB-INF/lib/a_foolder/*.jar wont work. On JBoss
> > > 5.0.1GA this works fine but
> > > The tomcat class loader cant load thease files.
> >
> > Tomcat is following the servlet specification, which does not have any
> > provisions for subdirectories within WEB-INF/lib. JBoss is operating
> > outside the servlet specification in order to support this.
> >
> > > Thease jar files (WEB-INF/lib/a_foolder/*.jar) is referenced from the
> > > main.jar file (WEB-INF/lib/main.jar) manifest:
> > >
> > > WEB-INF/lib/main.jar/META-INF/MANIFEST.MF:
> > >
> > > /WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
> > > /a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
> >
> > A JAR file's manifest isn't used for any class loading operations,
> > unless the JAR file is being "run" by the JVM such as "java -jar
> > [jarfile]" and the MANIFEST.MF file contains a "Class-Path" entry. The
> > contents of your MANIFEST.MF file are not relevant.
>
>
> I remember Weblogic allowed this CLASSPATH manifest nightmare, but i
> don't recommend it because:
>
> 1. Even when using WL, only some classloaders (EAR classloader ?) seems
> to work with this (WAR classloader do not);
>
> 2. If you write the wrong path, there will be no warning/error message
> and you just discover the problem when you (or your container/app
> server) try to load some classes/resources from that jar;
>
> 3. I never knew relative to what this entries in manifest file are. I
> think that the path was relative to EAR structure, but (if i'm not
> wrong :-)) CLASSPATH manifest entries are relative to the path of the
> jar that include them.
> If you declare (in the manifest file of dir_one/a.jar) 'dir_two/b.jar',
> the classloader will try to load dir_two/b.jar FROM dir_one. I think
> that it will try to load dir_one/dir_two/b.jar because a.jar is IN
> dir_one.
>
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Re: jar loading in folder web-inf/lib/folder/*.jar
Posted by Daniel Henrique Alves Lima <em...@yahoo.com.br>.
On Tue, 2009-06-30 at 11:59 -0400, Christopher Schultz wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Karan,
>
> On 6/30/2009 3:12 AM, kr@dossier.no wrote:
> > Loading of jar files under WEB-INF/lib/a_foolder/*.jar wont work. On JBoss
> > 5.0.1GA this works fine but
> > The tomcat class loader cant load thease files.
>
> Tomcat is following the servlet specification, which does not have any
> provisions for subdirectories within WEB-INF/lib. JBoss is operating
> outside the servlet specification in order to support this.
>
> > Thease jar files (WEB-INF/lib/a_foolder/*.jar) is referenced from the
> > main.jar file (WEB-INF/lib/main.jar) manifest:
> >
> > WEB-INF/lib/main.jar/META-INF/MANIFEST.MF:
> >
> > /WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
> > /a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
>
> A JAR file's manifest isn't used for any class loading operations,
> unless the JAR file is being "run" by the JVM such as "java -jar
> [jarfile]" and the MANIFEST.MF file contains a "Class-Path" entry. The
> contents of your MANIFEST.MF file are not relevant.
I remember Weblogic allowed this CLASSPATH manifest nightmare, but i
don't recommend it because:
1. Even when using WL, only some classloaders (EAR classloader ?) seems
to work with this (WAR classloader do not);
2. If you write the wrong path, there will be no warning/error message
and you just discover the problem when you (or your container/app
server) try to load some classes/resources from that jar;
3. I never knew relative to what this entries in manifest file are. I
think that the path was relative to EAR structure, but (if i'm not
wrong :-)) CLASSPATH manifest entries are relative to the path of the
jar that include them.
If you declare (in the manifest file of dir_one/a.jar) 'dir_two/b.jar',
the classloader will try to load dir_two/b.jar FROM dir_one. I think
that it will try to load dir_one/dir_two/b.jar because a.jar is IN
dir_one.
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Re: jar loading in folder web-inf/lib/folder/*.jar
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Karan,
On 6/30/2009 3:12 AM, kr@dossier.no wrote:
> Loading of jar files under WEB-INF/lib/a_foolder/*.jar wont work. On JBoss
> 5.0.1GA this works fine but
> The tomcat class loader cant load thease files.
Tomcat is following the servlet specification, which does not have any
provisions for subdirectories within WEB-INF/lib. JBoss is operating
outside the servlet specification in order to support this.
> Thease jar files (WEB-INF/lib/a_foolder/*.jar) is referenced from the
> main.jar file (WEB-INF/lib/main.jar) manifest:
>
> WEB-INF/lib/main.jar/META-INF/MANIFEST.MF:
>
> /WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
> /a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
A JAR file's manifest isn't used for any class loading operations,
unless the JAR file is being "run" by the JVM such as "java -jar
[jarfile]" and the MANIFEST.MF file contains a "Class-Path" entry. The
contents of your MANIFEST.MF file are not relevant.
> I have also tried with prefix without any success,
> WEB-INF/lib/a_folder/cxf-rt-frontend-jaxws-2.2.jar
> WEB-FIN/lib/a_folder/geronimo-ws-metadata_2.0_spec-1.1.2.jar
>
> Dosnt tomcat support loading of jar libs within a folder in WEB-INF/lib ?
No. If you must have subdirectories within your WEB-INF/lib, you can
either attempt to configure Tomcat's class loaders to do that (I'm not
sure how that would be done) or you can write your own ClassLoader and
use /that/ for your webapp.
- -chris
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