EclipseLink/FAQ

This is the EclipseLink FAQ, please feel free to post "common" questions here about EclipseLink that you believe "other" users we find "useful". Please do not use this to ask general questions or for issues you are having using the product or for support, please post these types of questions to the Forum.

Please add your questions to the most suitable category or create a new category. (to add a question edit this page and provide a link to your question).

General

What is the relationship between EclipseLink and the Oracle TopLink product?

EclipseLink was initiated based on the contribution of Oracle TopLink (Oracle FAQ for TopLink contribution).

What are the components of the EclipseLink project?

The EclipseLink project has several components delivering various persistence services implementations or supporting functionality:

• Foundation: Common functionality shared between multiple services. Includes the native object-relational and object-XML implementations.
• JPA: Implementation of the Java Persistence API (JPA) along with extensions
• MOXy
• SDO
• DBWS
• Utils

Where can I download EclipseLink?

At present EclipseLink can only be downloaded directly from the Eclipse project's website:

http://www.eclipse.org/eclipselink/downloads/index.php

EclipseLink Foundation

Caching

TopLink's object-caching is one of its most powerful and least understood questions. Addressing some of these issues in the FAQ is important.

See Caching with EclipseLink and Guidelines for Configuring the Cache and Identity Maps in the EclipseLink User's Guide for additional information.

EclipseLink JPA

What are the best practices for using EclipseLink JPA?

See Developing JPA Projects in the EclipseLink User's Guide for more information.

EclipseLink MOXy

• What is MOXy Object-XML: JAXB

EclipseLink SDO

• What are Service Data Objects: SDO

EclipseLink EIS

• What is Non-Relational EIS: JCA

See Developing EIS Projects in the EclipseLink User's Guide for more information.