TopLink
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| Developer(s) | Oracle Corporation |
|---|---|
| Stable release | 11g Release 1 (11.1.1.4.0) / June 1, 2011 |
| Development status | Active |
| Written in | Java |
| Operating system | Cross-platform |
| Platform | Java Virtual Machine |
| Type | Object-relational mapping |
| License | Oracle Licence |
| Website | http://www.oracle.com/technology/products/ias/toplink/ |
In computing, TopLink is an object-relational mapping (ORM) package for Java developers. It provides a framework for storing Java objects in a relational database or for converting Java objects to XML documents.
TopLink Essentials [1] is the reference implementation of the EJB 3.0 Java Persistence API (JPA) and the open-source community edition of Oracle's TopLink product. TopLink Essentials is a limited version of the proprietary product. For example, TopLink Essentials doesn't provide cache synchronization between clustered applications, some cache invalidation policy, and query Cache.
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[edit] History
The Object People originally developed TopLink in Smalltalk in the 1990s. (The "TOP" in TopLink is an acronym for The Object People, and the name was originally capitalized as "TOPLink".) In 1996-1998 a Java version of the product was added to the product line, named TopLink for Java. After the joint acquisition of The Object People in April 2000 by BEA Systems and WebGain, the TopLink product-line became the property of WebGain[2]
In 2002 Oracle Corporation acquired TopLink, which continues to be developed as a member of the Oracle Fusion Middleware family of products.
TopLink has won awards including::
- 4th-best Java persistence architecture (as voted by Java Developer's Journal readers in 2004).[5]
In 2006, Oracle donated source code from the TopLink product and development resources to the open-source Sun Microsystems java.net GlassFish project. This project, named TopLink Essentials, became the Java EE EJB 3.0 JPA reference implementation.
In 2007, Oracle donated the source code from the TopLink product and development resources to the open-source Eclipse Foundation EclipseLink project.[6]
In March 2008 the Eclipse Foundation announced that Sun Microsystems had selected the EclipseLink project as the reference implementation for the JPA 2.0, JSR 317 standard to succeed TopLink Essentials.[7]
[edit] Features
As well as functioning as an object-relational mapping tool, TopLink has other features including:
- query framework that supports an object-oriented expression framework, Query by Example (QBE), EJB QL, SQL, and stored procedures
- an object-level transaction framework
- caching to ensure object identity
- a set of direct and relational mappings
- object-to-XML mappings, in addition to JAXB support
- EIS/JCA support for non-relational datasources
- visual mapping editor (Mapping Workbench)
- limited support for query in memory
[edit] See also
[edit] References
- ^ TopLink Essentials: Oracle TopLink JPA
- ^ A Brief History of TopLink by Donald Smith
- ^ Best Java Data Access Tool or Driver by Java Pro
- ^ Best Java Data Access Tool by JavaWorld
- ^ The 4th best Java persistence architecture by Java Developer's Journal
- ^ "Oracle Proposes Open Source Persistence Project at Eclipse Foundation". Oracle. March 6, 2008. http://www.oracle.com/corporate/press/2007_mar/OpenSource-TopLink.html. Retrieved 2008-09-16.
- ^ "Eclipse Announces EclipseLink Project to Deliver JPA 2.0 Reference Implementation". Eclipse Foundation. March 17, 2008. http://www.eclipse.org/org/press-release/20080317_Eclipselink.php. Retrieved 2008-09-16.
[edit] External links
- Oracle TopLink Official Home
- Oracle TopLink Quick Tour
- Oracle TopLink Forum
- Oracle TopLink Wiki
- TopLink Essentials Home
- TopLink Essentials Mailing List
- Unofficial TopLink Wiki
- Master the New Persistence Paradigm with JPA
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