1) can we declare thread in EJB(i know we can't) but if i create thread how to do in EJB. 2)How Container manager relationships mapping are happen(ie mapping how it is taken place in container.)
1. Creating threads in EJB is n't different from normal threads. Creating threads in EJB is not recommended(not allowed)becasue it will interfere with the containers thread.
2.You will be declaring the relationship in the ejb-jar.xml, the container reads this file and establishes the relation.