Classloader issues: Need to share libraries across web appli

[kpalania]

Hi,
I have 2 applications (WAR and SAR). Currently, the same set of shared libraries are copied to both the locations and hence, I am running into a ClassCastException which appears to be due to ClassLoading issues (based on reading done). So, I need to move these to the EAR level (WAR and SAR applications are deployed as part of this EAR). How can I do that and what are the steps involved?

I realize I need to change the UseJBossWebLoader flag in jboss/tomcat jboss-service.xml (perhaps) and make some more changes to jboss-app.xml but I can't seem to find the exact steps anywhere and without the perfect set of changes, ofcourse, JBoss is not going to be happy :(

[jaikiran]

So, I need to move these to the EAR level (WAR and SAR applications are deployed as part of this EAR). How can I do that and what are the steps involved?

You will have to create an ear file containing the war file and the sar file. Additionally, you will require a application.xml file and a jboss-app.xml file (both in the META-INF folder of the ear). The application.xml will contain something like:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN" "http://java.sun.com/dtd/application_1_3.dtd">
<application>
 <display-name>My Application</display-name>

 <module>
 <web>
 <web-uri>myApp.war</web-uri>
 <context-root>/myApp</context-root>
 </web>
 </module>
</application>

Then the jboss-app.xml will contain:

<jboss-app>
 <loader-repository>
 tap:loader=myApp.ear
 <loader-repository-config>
 java2ParentDelegation=false
 </loader-repository-config>
 </loader-repository>

 <module>
 <service>myAppSar.sar</service>
 </module>


</jboss-app>

Replace myApp.war, myApp.ear and myAppSar.sar without appropriate names of your archives.

The loader-repository in jboss-app.xml is optional in the jboss-app.xml, retain it if you want classloader isolation for the ear file.

[kpalania]

thanks very much jaikiran! i'll give this a shot and see how it goes. will respond with questions if there are some issues. thanks again!