Use a Java library with a Java EE application

Include Java libraries in an application.

In the following example, a library called Alexandria consists of two files:

• alexandria-scrolls.jar and

• commons-lang.jar

An application called Scholar, running on a server called Academy, needs access to this library.

1. Create a mylib/Alexandria directory in the servers/Academy directory under the ${WLP_USER_DIR} directory.

   For example: wlp/usr/servers/Academy/mylib/Alexandria.

2. Copy the alexandria-scrolls.jar and commons-lang.jar files into the new folder.

3. Configure class loading for the application, so the Alexandria library is loaded.

   In server.xml, or an included file, add the following code:

   <application id="scholar" name="Scholar" type="ear" location="scholar.ear">
     <classloader>
       <privateLibrary>
         <fileset dir="${server.config.dir}/mylib/Alexandria" includes="*.jar" scanInterval="5s" />
       </privateLibrary>
     </classloader>
   </application>

   The <privateLibrary> element can also take a filesetRef attribute with a comma-separated list of <fileset> element IDs.

Parent topic: Configure class loaders and libraries for Java EE applications

Tasks:

Share a library across multiple Java EE applications

Provide global libraries for all Java EE applications

Access third-party APIs from a Java EE application

Remove access to third-party APIs for a Java EE application

Overriding a provided API with an alternative version