Answer Posted / ch.n.v.ganesh
First, relationships are maintained through foreign
keys, but you do not define foreign keys as conventional
EJB variables; they are generated and maintained by the
container.
Second, relationships generate additional methods on the
local interfaces of the EJBs involved. Consequently, you
will need to work with the Home interfaces for beans
through JNDI, rather than using factory classes as you
might for accessing them through their Remote
interfaces.
Finally, Container Managed Relationship (cmr) fields
may be used in EJB QL queries, just like conventional
fields, but only for EJBs within the same jar file.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Can an ejb send asynchronous notifications to its clients?
What is difference between stateless and stateful?
What is activemq used for?
What is @resource in java?
What is enterprise javabeans (ejb) container?
What are the limitations of using local object?
How do I use a less than or greater than on a message selector in ejb-jar.xml?
What is Enterprise JavaBeans (EJB)?
What is the difference between session and entity beans? When should I use one or the other?
What do you mean by in-memory replication?
What do you understand by annotation in ejb to do the database entity relationships/mappings with examples?
Explain the architectural relationship between JavaBeans and JTA?
What is @injectmock?
Define Context?
What does ejb stand for?