EclipseLink JPA and Tooling
One of the most common misconceptions is that all open source projects at the Eclipse Foundation are focussed on the Eclipse IDE. While the Eclipse IDE is what Eclipse may be best known for, it is definitely not the only type of project being developed and maintained at Eclipse. EclipseLink is a runtime persistence solution for Java EE, Java SE, Web, and OSGi environments. While it does offer useful development utilities it is a runtime solution and is not dependent on the Eclipse IDE.
However, developers who do use the Eclipse IDE can take advantage of the JPA tooling support offered by the Dali Java Persistence Tools project. Beyond Eclipse, Oracle JDeveloper and Sun's NetBeansTM will both be offering extended support for EclipseLink's advanced features in upcoming releases.
Within the Eclipse Ganymede release users of the Dali tooling will find both standard JPA support as well as support for EclipseLink specific features. When you use the New JPA Project wizard
you can specify which JPA runtime platform you wish to use.
By selecting EclipseLink you enable rich editors for configuring many of EclipseLink's advanced features including:
- Connection Pooling
- Schema Generation
- Weaving ConfigurationC
- Customizers and Event Listeners
EclipseLink and OSGi
OSGi has a growing presence in the Java community. However, one of the challenges to OSGi development is lack of commercial and open source frameworks that are fully OSGi compatible. EclipseLink 1.0 is fully compatible with OSGi. Unlike other persistence frameworks, EclipseLink is packaged as a set of OSGi bundles ready for use on any OSGi runtime. Among those using EclipseLink in OSGi is Sun Microsystems in the GlassFish V3 application server which is based on the Apache Felix OSGi runtime. While running on all OSGi runtimes, EclipseLink is able to leverage runtime specific features. For example, in Equinox, EclipseLink JPA integrates with the advanced class loading infrastructure to enable byte code weaving of Entities.
How to get started with EclipseLink?
Those wanting to use EclipseLink in their projects have a number of options available. The EclipseLink project's home at the Eclipse Foundation (www.eclipse.org/eclipselink ) provides access to official releases, monthly milestones, nightly builds and direct access to the project's Subversion code repository. Also available are developer and user mailing lists, newsgroup, complete documentation hosted on the wiki, and examples illustrating how to use EclipseLink in a variety of situations.
In addition to direct access to EclipseLink from the project's home at Eclipse.org, developers can also find EclipseLink in a number of commercial products and open source projects. EclipseLink will be included with Oracle TopLink so it will be available in future versions of Oracle's Application Server. Sun Microsystems' selection of EclipseLink as the JPA 2.0 reference implementation means that EclipseLink is included with both GlassFish and the Sun Application Server. As of version 2.5.2, the Spring Framework ships EclipseLink and includes the necessary code to allow it to be used as an integrated JPA provider. This initial list is substantial in terms of the number of Java developers who have or will have access to EclipseLink through the other products and open source projects they already use.
For developers currently using Oracle TopLink or TopLink Essentials, EclipseLink is a natural upgrade. EclipseLink is Oracle's strategic Java persistence implementation within Oracle Fusion Middleware going forward. How-to guides focused on migration to EclipseLink from previous versions as well as migration utilities to simplify the slight metadata and package naming changes are provided.
The EclipseLink project's emergence in the open source Java community is intended to change the landscape in this space. We currently have dedicated group of 28 committers from Oracle and Sun as well as additional contributions from a growing community. Our challenge is to continue what we started with TopLink where we evolved the product based on the changes in Java technology and the feedback of our users. Now we need to grow as an open source community consisting of committers, contributors and users where open communication channels enable feedback and ongoing evolution of the project. We invite you to download EclipseLink for yourself and participate in the growing community around the project.
Doug Clarke - email@example.com
Director of Product Management - Oracle TopLink
EclipseLink Project co-lead
Eclipse RT Project PMC
Eclipse Architecture Council
Shaun Smith - firstname.lastname@example.org
Principal Product Manager - Oracle TopLink
EclipseLink Eco-System Development Lead
Eclipse Dali and Teneo Projects Committer