13 Using an External MetaData Source

This chapter provides instructions for storing mapping information in a metadata source that is external to the running application, so you can dynamically override or extend mappings in a deployed application.

This chapter includes the following sections:

• Introduction to the Solution

• Using the eclipselink-orm.xml File Externally

• Main Tasks

• Additional Resources

Use Case

Users want to establish a SaaS environment, where applications are shared by multiple clients.

Solution

Employ EclipseLink SaaS features, such as extensibility, multi-tenancy, and external metadata sources.

Components

• EclipseLink 2.4 or later.