1. EJB Types
Alessio Bechini
June 2002

2. Entity Beans Does not exist Pool Ready unsetEntityContext
1) Class.newInstance 2) setEntityContext
ejbHome ejbFind ejbSelect
Pool
1) ejbCreate 2) EjbPostCreate or ejbActivate
ejbPassivate
ejbRemove
Ready
ejbLoad ejbStore
ejbSelect
Any operating method

3. Session Beans (stateless)
Does not exist
1) Class.newInstance 2) SetSessionContext 3) ejbCreate
ejbRemove
Ready
Any operating method

4. Session Beans (statefull)
Does not exist
Timeout
1) Class.newInstance 2) SetSessionContext 3) ejbCreate
ejbRemove
1) Client calling a transactional operating method 2) afterBegin
ejbPassivate
Ready
Passive
1) beforeCompletion (only with commit) 2) afterCompletion
ejbActivate
Any operating method (not transactional)
Ready in transaction
Any transactional operating method

5. Message Beans Does not exist Ready (in pool)
1) newInstance 2) setMessageDriv- enSessionContext 3) ejbCreate
ejbRemove
Ready (in pool)
onMessage(msg)