I forgot to include a pointer to the following source code:
http://fisheye5.cenqua.com/browse/glassfish/appserv-core/src/java/com/sun/enterprise/server/PersistenceUnitLoaderImpl.java?r=1.17
Sahoo wrote:
> There are two entities involved here: container (or the application
> server) and persistence provider. When user deploys an application to
> a container, the container reads only persistence.xml file and in turn
> calls the persistence provider for necessary JPA related deployment
> activities like processing of ORM annotations, orm xml files, db
> schema generation etc. JPA deployment is initiated using a standard
> SPI defined by JPA spec. See chapter #7 (Container Provider Contracts
> for Deployment and Bootstrapping) of JPA 1.0 spec. It is this SPI that
> makes it possible for different providers to work in the same
> application server. DB schema generation is done using a provider
> specific manner, as that is not covered by the SPI.
>
> I suggest you take a look at chapter #7 first. For implementation
> details, you can start looking at PersistenceUnitLoaderImpl.java [1]
> and then ask us questions. Once you visit that class, you can browse
> related classes like PersistenceUnitDescriptor, PersistenceUnitInfo, etc.
>
> Thanks,
> Sahoo
>
> glassfish_at_javadesktop.org wrote:
>> Hi,
>>
>> I am trying to find out how the inner workings of deployment
>> functions.. I would like to come to understand exactly what is going
>> on with regards to
>> [b]1. how are entitybeans are loaded?
>>
>> 2. how the entities get mapped with JPA, and how this functions in a
>> generic manner so the it works with different JPA providers?
>>
>> 3. how and when the database scheme gets updated?[/b]
>>
>> Any help would be grateful, source to look at or any general
>> direction.. i am current looking through glassfish source, however
>> thought if one of you expert devs know it could save me a load of time..
>>
>> cheers,
>>
>> dixie.
>> [Message sent by forum member 'newdixieland' (newdixieland)]
>>
>> http://forums.java.net/jive/thread.jspa?messageID=345882
>>
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>