Head First EJB

Bean things you can do from stateless bean methods

constructor	setSessionContext()		business method
nothing	Use your SessionContext to:		Use your SessionContext to:
		get a reference to your home		get a reference to your home
		get a reference to your EJB object		get a reference to your EJB object
		get security information about the client		get security information about the client
		force a transaction to rollback (CMT beans)		force a transaction to rollback (CMT beans)
		find out if the transaction has already been set to rollback (CMT beans)		find out if the transaction has already been set to rollback (CMT beans)
		get a transaction reference, and call methods on it (BMT beans)		get a transaction reference, and call methods on it (BMT beans)
	Access:		Access:
		your special JNDI environment		your special JNDI environment
		another bean’s methods		another bean’s methods
		a resource manager (like a database)		a resource manager (like a database)
	ejbCreate(), ejbRemove() Use your SessionContext to:
		get a reference to your home	Note Unlike stateFUL beans, a stateLESS bean can’t get caller security info in ejbCreate(), because there IS no client associated with the stateless bean’s creation. Remember, it’s the Container that decides to create the bean, and its not tied to any client.
		get a reference to your EJB object
		get security information about the client
		force a transaction to rollback (CMT beans)
		find out if the transaction has already been set to rollback (CMT beans)
		get a transaction reference, and call methods on it (BMT beans)
	Access:
		your special JNDI environment
		another bean’s methods
		a resource manager (like a database)