Greetings!
1. Is it correct to say that entity beans simply represent persitence
support in EJB environment, that is if you have identified any data which
needs to be persistent , you must represent it as an entity bean.
2. Is it also correct if I say that an entity bean represents a row in a
database. Hence if have a query which should return multiple records , that
query must be put in a session bean. Similarly, if multiple updates and
deletes are required that too must be put in a session bean.
3. Sometimes data is directly read by a session bean using JDBC. What will
happen if that data is in an entity bean instance and the entity bean
transaction isolation level has been marked as TX_SERIALIZABLE
4. If I want to do a batch update , performance wise using JDBC from a
session bean will be faster. instead of calling findByPrimaryKey multiple
times and invoking delete method of entity EJB object.
Regards
Ravi
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