History
Hibernate was started in 2001 by Gavin King as an alternative to using EJB2-style entity beans. Its mission back then was to simply offer better persistence capabilities than offered by EJB2 by simplifying the complexities and allowing for missing features.
Early in 2003, the Hibernate development team began Hibernate2 releases which offered many significant improvements over the first release.
JBoss, Inc. (now part of Red Hat) later hired the lead Hibernate developers and worked with them in supporting Hibernate.
In 2010, Hibernate version 3.x was released with the features like: a new Interceptor/Callback architecture, user defined filters, and JDK 5.0 Annotations (Java's metadata feature). As of 2010 Hibernate 3 (version 3.5.0 and up) was a certified implementation of the Java Persistence API 2.0 specification via a wrapper for the Core module which provides conformity with the JSR 317 standard.
In Dec 2011, Hibernate Core 4.0.0 Final was released. This includes new features like: Initial multi-tenancy support, Introduction of ServiceRegistry (which is a major change in how Hibernate builds and manages "services"), Clean up of Session opening from SessionFactory, Improved integration via org.hibernate.integrator.spi.Integrator and auto discovery, Improved logging with i18n support and message codes, Initial work on more clear split between API, SPI and implementation classes, Clean up of deprecated methods, classes, etc.
In 2012, Hibernate 5 started development. It will contain JPA 2.1 support.
Read more about this topic: Hibernate (Java)
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