EJB 2.0 Support

The OC4J EJB container provides complete support for EJB 2.0, which includes the full support of the following:

• session beans

• entity beans

• message-driven beans

• BMP

• CMP

• object-relational mapping

OC4J provides CMP implementation for entity beans supporting object-relational mapping. OC4J supports one-to-one, one-to-many, many-to-one and many-to-many object-relational mappings (see "Container-Managed Relationships"), including simple object-relational mapping for simple, primitive, and serializable objects, as well as complex object-relational mapping for compound objects, entity references, and collections.

You can use OC4J to persist EJB 2.0 entity beans using the Orion persistence manager (see "Orion Persistence Manager").

Note: The key difference between the Orion persistence manager (see "Orion Persistence Manager") and the TopLink persistence manager (see "TopLink Persistence Manager") is that the former is limited to the support of EJB 2.0 entity beans, whereas the latter supports EJB 2.1 entity beans and EJB 3.0 entities.