Application-Specific Class Loading

You can specify module- or application-specific library classes during deployment in one of the following ways:

• Use the Administration Console. Open the Applications component, then go to the page for the type of application or module. Select the Deploy button. Type the comma-separated paths in the Libraries field. For details, click the Help button in the Administration Console.

• Use the asadmin deploy command with the --libraries option and specify comma-separated paths. For details, see the Sun GlassFish Enterprise Server v3 Reference Manual.

You can only specify module- or application-specific library classes during deployment. You can update a library JAR file using dynamic reloading or by restarting (disabling and re-enabling) a module or application. To add or remove library JAR files, you must redeploy the module or application.

Application libraries are included in the Applib class loader. Paths to libraries can be relative or absolute. A relative path is relative to domain-dir/lib/applibs. If the path is absolute, the path must be accessible to the domain administration server (DAS).

If multiple applications or modules refer to the same libraries, classes in those libraries are automatically shared. This can reduce the memory footprint and allow sharing of static information. However, applications or modules using application-specific libraries are not portable. Other ways to make libraries available are described in Circumventing Class Loader Isolation.

One library cannot reference classes from another library.

For general information about deployment, including dynamic reloading, see the Sun GlassFish Enterprise Server v3 Application Deployment Guide.