samples.j2ee.ejb.subclass.child
Class ChildBean

java.lang.Object
  |
  +--samples.j2ee.ejb.subclass.parent.ParentBean
        |
        +--samples.j2ee.ejb.subclass.child.ChildBean

public class ChildBean

extends ParentBean

implements javax.ejb.SessionBean

ChildBean is a stateless SessionBean. This bean illustrates:

• Child class to the ParentBean class
• Using subclassing to simplify related bean classes
• Contains only methods that are either unique to the Child class or overload methods in the Parent Bean
• Using JNDI to look up and call another bean from within a bean (callParentBean)

See Also:

Serialized Form

Constructor Summary

ChildBean()

Method Summary

java.lang.String	callParentBean() Looks up a parent bean and calls its parentMethodOnly().
java.lang.String	childSaysHello() Returns a message identifying the method.
static javax.naming.Context	newInitialContext()
java.lang.String	parentSaysHello() Returns a message identifying the method.

Methods inherited from class samples.j2ee.ejb.subclass.parent.ParentBean

ejbActivate, ejbCreate, ejbPassivate, ejbRemove, parentMethodOnly, setSessionContext

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChildBean

public ChildBean()

Method Detail

childSaysHello

public java.lang.String childSaysHello()

Returns a message identifying the method. This method is unique to the Child bean.

Returns:

String Message

parentSaysHello

public java.lang.String parentSaysHello()

Returns a message identifying the method. This method is inherited and overloaded by the Child bean.

Overrides:

parentSaysHello in class ParentBean

Returns:

String Message

callParentBean

public java.lang.String callParentBean()
                                throws java.rmi.RemoteException

Looks up a parent bean and calls its parentMethodOnly(). Returns a message identifying the method.

• Demonstrates calling one bean from another bean
• Uses SessionContext ctx to generate a new Context
• Uses that Context to find the ParentHome

Returns:

String Message

Throws:

java.rmi.RemoteException - if there is a communications or systems failure

newInitialContext

public static javax.naming.Context newInitialContext()
                                              throws java.lang.Exception