7 Replies Latest reply on Mar 14, 2005 4:01 AM by nicolas.jouanin

Classpath problem when developing Eclipse Plugin project to

charleszq Dec 24, 2004 9:06 AM

Hi,

I'm tring to develop a plugin project in Eclipse 3.0, a UI to remotely access JBoss EJBs. I define a method 'getContext' somewhere to get the instance of InitialContext, like this:

Hashtable props = new Hashtable();
props.put( "java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory" );
props.put( "java.naming.provider.url", "jnp://localhost:1099" );
props.put( "java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces" );

return new InitialContext( props );

The above code can run successfully in a standalone program, but when running in the PDE environment, I always get the 'ClassNotFoundException' of NamingContextFactory. But I'm sure that I've put the jbossall-client.jar in the runtime classpath of the plugin.

Anyone here encountered the same problem? Please help.

Thanks.

Charles

1. Re: Classpath problem when developing Eclipse Plugin project

nicolas.jouanin Mar 8, 2005 3:31 PM (in response to charleszq)

Hi,

I'm faced to the same problem now ...
Did you get an ansmwer or either find an solution ?
Actions
2. Re: Classpath problem when developing Eclipse Plugin project

maxandersen Mar 8, 2005 4:06 PM (in response to charleszq)

nothing jboss specific about it....just eclipse hard to see through classloaders playing with you ,)

have you remembered to add it in the plugin.xml as a dependent jar ?
Actions
3. Re: Classpath problem when developing Eclipse Plugin project

nicolas.jouanin Mar 8, 2005 4:10 PM (in response to charleszq)

I would be also interested in a solution.
I tried to add jboss client jars (ie copied client/*.jar in my plugin dir.) , then added them as dependency. It seems to work because IDE is able to find the packages and resolve Jboss/J2EE imports.
But when I run my RCP application using this plugin I get this ClassNotFoundException when calling InitialContext( props)
Actions

4. Re: Classpath problem when developing Eclipse Plugin project

nicolas.jouanin Mar 8, 2005 4:13 PM (in response to charleszq)

For information, is my plugin.xml :

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin
 id="com.arcadia.richclient.ejb.tools"
 name="com.arcadia.richclient.ejb.tools"
 version="1.0.0"
 provider-name=""
 class="com.arcadia.richclient.ejb.tools.EjbToolsPlugin">

 <runtime>
 <library name="jbossall-client.jar">
 <export name="*"/>
 </library>
 <library name="jboss-client.jar">
 <export name="*"/>
 </library>
 <library name="jboss-common-client.jar">
 <export name="*"/>
 </library>
 <library name="jnp-client.jar">
 <export name="*"/>
 </library>
 <library name="log4j.jar">
 <export name="*"/>
 </library>
 </runtime>

 <requires>
 <import plugin="org.eclipse.core.runtime"/>
 <import plugin="com.arcadia.richclient.core.libs"/>
 <import plugin="com.arcadia.richclient.core.tools"/>
 </requires>

</plugin>

5. Re: Classpath problem when developing Eclipse Plugin project

nicolas.jouanin Mar 10, 2005 12:42 PM (in response to charleszq)

My problem was solved by following Eclipse FAQ 107:
http://www.eclipsefaq.org/chris/faq/html/faq107.html
Actions
6. Re: Classpath problem when developing Eclipse Plugin project

maxandersen Mar 11, 2005 5:25 AM (in response to charleszq)

that is a workaround basically overriding the eclipse classloading mechanism ..... should not be used unless you have a very good reason and understanding on what classes is loaded.

just a warning ,)
Actions
7. Re: Classpath problem when developing Eclipse Plugin project

nicolas.jouanin Mar 14, 2005 4:01 AM (in response to charleszq)

Well, I don't really see what is hiding this class loading mechanism. But it made my problem solved so I thought that was THE solution.
Actions

Go to original post