OpenBooks is a sample (and perhaps, simple) application featuring some of the new features in JPA 2.0.
This demonstration features usage of new JPA 2.0 features such as 
  * Criteria Query
  * Compound, Derived identity
  * Orphan Delete
  * Persistent Domain Model API 

The sample application shows essential build and packaging steps for both as 
  * a Swing-based JSE application and 
  * a typical Web Application Archive (*.war) ready to be deployed in a Java Enterprise container.  

OpenBooks demonstrates few useful practices in domain modeling such as composite persistent relations,
isolating immutable state for better cache utilization, immutable relationship etc. Architecturally,
OpenBooks uses a design pattern to enable the same persistence service be used inside and outside
a managed environment. Such patterns vastly speeds up develop-test-debug cycle for persistence and
object-relation mapping functionality outside a container.   


h3. Availability
The source code and build script for OpenBooks is available in OpenJPA SubVersion repository under {{openjpa-examples/openbooks}}

To access the source code

   {{$ svn co https://svn.apache.org/repos/asf/openjpa/trunk/openjpa-examples/openbooks}}

h3. Building

  * Follow the [instruction|Building and Running OpenBooks] to build and run OpenBooks. 
These instructions can also be found also in [{{index.html}} at the {{OpenBooks}} root directory.

Here are few screen shots of OpenBooks running as a Swing Application.

h5. Selecting and Purchasing Books 
!OpenBooks.ScreenShot1.jpg!
  
h5. Persistent Domain Model (as a Powerpoint Slide)
!OpenBooks.ScreenShot2.jpg!

h5. Browsing the same domain model via Metamodel API 
!OpenBooks.ScreenShot3.jpg!