Sun Objectives - Persistence Units and Persistence Contexts

[Treimin Clark]

According to the Sun's objectives:

Under the "Persistence Units and Persistence Contexts" unit:

Sun microsystems wrote:

Identify correct and incorrect statements or examples about persistence units, how persistence units are packaged, and the use of the persistence.xml file.

Identify correct and incorrect statements or examples about the effect of persistence exceptions on transactions and persistence contexts.

Is their really anything we should need to understand under the above two topics? It seems these two topics are in very basic-level, and there are nothing to understand under that. Isn't it?

[Ralph Jaus]

It may be helpful to read JPA spec 6.1, 6.2.

Questions like "the WEB-INF directory of a WAR file may be the root of a persistence unit ?" aren't that easy to answer otherwise (question is from myself).

[Niranjan Deshpande]

Thanks for pointing the JPA sections.