[筆記]在Stateless Session Bean的方法中允許的操作

Bean方法	允許的操作
建構子	無
Dependency injection methods (setter methods).	SessionContext: getEJBHome, getEJBLocalHome, lookup. JNDI Access: Available
PostConstruct, PreDestroy methods (lifecycle callback methods).	SessionContext: getBusinessObject, getEJBHome, getEJBLocalHome, getEJBObject, getEJBLocalObject, lookup, getContextData, getTimerService, getUserTransaction (BMT only) JNDI Access: Available EntityManagerFactory: Accessible
Business method from any view or business method interceptor method	SessionContext: getBusinessObject, getEJBHome, getEJBLocalHome, getCallerPrincipal, isCallerInRole, getEJBObject, getEJBLocalObject, lookup, getContextData, getInvokedBusinessInterface, wasCancelCalled, getTimerService, getUserTransaction (BMT only) getRollbackOnly (CMT only) setRollbackOnly (CMT only) JNDI Access: Available Resource managers: Accessible Other EJBs: Accessible EntityManagerFactory: Accessible EntityManager: Accessible Timer and TimeService methods: Accessbile UserTransaction methods: Accessible (BMT only)
Business methods from web service endpoint.	SessionContext: getBusinessObject, getEJBHome, getEJBLocalHome, getCallerPrincipal, isCallerInRole, getEJBObject, getEJBLocalObject, lookup, getContextData, getTimerService, getMessageContext, getUserTransaction (BMT only), getRollbackOnly (CMT only), setRollbackOnly (CMT only). MessageContext methods: Available JNDI Access: Available Resource managers: Accessible. Other EJBs: Accessible. EntityManagerFactory: Accessible. EntityManager: Accessible. Timer and TimerService methods: Accessible. UserTransaction methods: Accessible (BMT only).
Timeout callback method.	SessionContext: getBusinessObject, getEJBHome, getEJBLocalHome, getCallerPrincipal, isCallerInRole, getEJBObject, getEJBLocalObject, lookup, getContextData, getTimerService, getUserTransaction (BMT only), getRollbackOnly (CMT only), setRollbackOnly (CMT only). JNDI Access: Available Resource managers: Accessible. Other EJBs: Accessible. EntityManagerFactory: Accessible. EntityManager: Accessible. Timer and TimerService methods: Accessible. UserTransaction methods: Accessible (BMT only).

ps.

1. BMT表Bean Managed Transaction
2. CMT表Container Managed Transaction

若在@PostConstruct和@PreDestroy中進行下列操作，則IllegalStateException會被丟出

呼叫對象	方法名稱
SesssionContext methods	Security related: getCallerPrincipal, isCallerInRole. Transaction related: getRollbackOnly, setRollbackOnly
Asynchronous related methods	wasCancelCalled
Client related SessionConext methods	getInvokedBusinessInterface
TimerService and Timer	All methods

節錄自：http://www.slideshare.net/krizsan/ocp-jbcd-6-study-notes，p.47