Java 2 Platform, Enterprise Edition: Platform and Component Specifications

This section contains object interaction diagrams (OIDs) that illustrate the interaction of the classes.

EJB.6.7.1 Notes

The object interaction diagrams illustrate a box labeled "container-provided classes." These are either classes that are part of the container, or classes that were generated by the container tools. These classes communicate with each other through protocols that are container-implementation specific. Therefore, the communication between these classes is not shown in the diagrams.

The classes shown in the diagrams should be considered as an illustrative implementation rather than as a prescriptive one.

EJB.6.7.2 Creating a Session Object

Figure EJB.6-2 illustrates the creation of a session object.

EJB.6.7.3 Starting a Transaction

Figure EJB.6-3 illustrates the protocol performed at the beginning of a transaction.

EJB.6.7.4 Committing a Transaction

Figure EJB.6-4 illustrates the transaction synchronization protocol for a session object.

EJB.6.7.5 Passivating and Activating an Instance Between Transactions

Figure EJB.6-5 illustrates the passivation and reactivation of a session bean instance. Passivation typically happens spontaneously based on the needs of the container. Activation typically occurs when a client calls a method.

EJB.6.7.6 Removing a Session Object

Figure EJB.6-6 illustrates the removal of a session object.