Associate shared libraries with applications or modules

 

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Overview

You can associate a shared library with an application or module. Classes represented by the shared library are then loaded in the application's class loader, making the classes available to the application.

This topic assumes that you have defined a shared library. The shared library represents a library file used by multiple deployed applications.

You can define a shared library at the cell, node, server, or cluster level.

This topic also assumes to use the console, and not an installed optional package, to associate a shared library with an application. To associate a shared library with an application or module, create and configure a library reference using the console. A library reference specifies the name of the shared library file.

If you associate a shared library with an application, do not associate the same shared library with a server class loader.

 

Procedure

1. Click...

   Applications | Enterprise Applications | application | Shared library references

   ...in the console navigation tree to access the Shared library references page.

2. On the Shared library references page, select an application or module to which you want to associate a shared library.

3. Click...

   Reference shared libraries

4. On the Shared Library Mapping page, select one or more shared libraries that the application or modules use in the Available list, click >> to add them to the Selected list, and click OK.

5. Repeat steps 2 through 4 until you define a library reference instance for each shared library that your application or module requires.

6. On the Shared library references page, click OK.

7. Save the changes to the configuration.

 

Results

When you run the application, classes represented by the shared library are loaded in the application class loader.

The classes are now available to the application or module.

To verify an association between an application and a shared library, examine the application class loader in the Class Loader Viewer. Click...

Troubleshooting | Class Loader Viewer | module_name | Table View

The classpath of the application module class loader lists the classes used by the shared library.

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Shared library reference and mapping settings

 

Related concepts

Class loaders
Installed optional packages

 

Related tasks

Creating shared libraries
Associating shared libraries with servers Manage shared libraries
Use installed optional packages

 

Related Reference

Shared library collection
Library reference collection