javax.ejb

Interface SessionBean

All Superinterfaces:

EnterpriseBean, Serializable

public interface SessionBean
extends EnterpriseBean

The SessionBean interface defines methods that the EJB container uses to notify a session bean instance of the instance's life cycle events.

As of EJB 3.0 it is no longer required that a session bean class implement this interface.

Since:

EJB 1.0

Method Summary

Modifier and Type	Method and Description
void	ejbActivate() The activate method is called when a stateful session bean instance is activated from its "passive" state.
void	ejbPassivate() The passivate method is called before a stateful session bean instance enters the "passive" state.
void	ejbRemove() A container invokes this method before it ends the life of the session object.
void	setSessionContext(SessionContext ctx) Set the associated session context.

Method Detail

setSessionContext

void setSessionContext(SessionContext ctx)
                throws EJBException,
                       RemoteException

Set the associated session context. The container calls this method after the instance creation.

The session bean instance should store the reference to the context object in an instance variable.

This method is called with no transaction context.

Parameters:

ctx - A SessionContext interface for the instance.

Throws:

EJBException - Thrown by the method to indicate a failure caused by a system-level error.

RemoteException - This exception is defined in the method signature to provide backward compatibility for applications written for the EJB 1.0 specification. Enterprise beans written for the EJB 1.1 specification should throw the javax.ejb.EJBException instead of this exception. Enterprise beans written for the EJB2.0 and higher specifications must throw the javax.ejb.EJBException instead of this exception.

ejbRemove

void ejbRemove()
        throws EJBException,
               RemoteException

A container invokes this method before it ends the life of the session object. This happens as a result of a client's invoking a remove operation, or when a container decides to terminate the session object after a timeout.

This method is called with no transaction context.

Throws:

EJBException - Thrown by the method to indicate a failure caused by a system-level error.

RemoteException - This exception is defined in the method signature to provide backward compatibility for enterprise beans written for the EJB 1.0 specification. Enterprise beans written for the EJB 1.1 specification should throw the javax.ejb.EJBException instead of this exception. Enterprise beans written for the EJB2.0 and higher specifications must throw the javax.ejb.EJBException instead of this exception.

ejbActivate

void ejbActivate()
          throws EJBException,
                 RemoteException

The activate method is called when a stateful session bean instance is activated from its "passive" state. The instance should acquire any resource that it has released earlier in the ejbPassivate method.

This method is called with no transaction context.

Throws:

EJBException - Thrown by the method to indicate a failure caused by a system-level error.

RemoteException - This exception is defined in the method signature to provide backward compatibility for enterprise beans written for the EJB 1.0 specification. Enterprise beans written for the EJB 1.1 specification should throw the javax.ejb.EJBException instead of this exception. Enterprise beans written for the EJB2.0 and higher specifications must throw the javax.ejb.EJBException instead of this exception.

ejbPassivate

void ejbPassivate()
           throws EJBException,
                  RemoteException

The passivate method is called before a stateful session bean instance enters the "passive" state. The instance should release any resources that it can re-acquire later in the ejbActivate method.

After the passivate method completes, the instance must be in a state that allows the container to use the Java Serialization protocol to externalize and store away the instance's state.

This method is called with no transaction context.

Throws:

EJBException - Thrown by the method to indicate a failure caused by a system-level error.

RemoteException - This exception is defined in the method signature to provide backward compatibility for enterprise beans written for the EJB 1.0 specification. Enterprise beans written for the EJB 1.1 specification should throw the javax.ejb.EJBException instead of this exception. Enterprise beans written for the EJB2.0 and higher specifications must throw the javax.ejb.EJBException instead of this exception.