This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Let me explain the CMP-CMR relationships and the problem!! Say we have Employee (CMP-EJB) maps to EMPLOYEE_TBL and Dept (CMP-EBJ) maps to DEPT_TBL in EMPLOYEE_TBL there is a Dept_FK that maps to Dept_ID in DEPT_TBL Say there are 2 Million employees ( Imaginary company ! ) out of these 2 Million say 1 Million belongs to Dept 1. As per EJB specification set the Dept_FK relationship of the Employee Bean in its ejbPostCreate() method. Now try to add one more employee to Dept 1, while the Dept_FK CMR relationship is being set to this Employee Bean in the ejbPostCreate() method of EmployeeBean the container will call ejbActivate() method 1 million + 1 times and then sets the relationship of new Employee with Dept 1 EJB, then calls the ejbStore method of this new Employee. Then again try to add one more Employee to same dept 1, this time its going to call ejbActivate() for 1 Million + 2 times !!! What is going on here? Is this how the CMP beans supposed to work? or am I missing some settings in orion-ejb-jar.xml or any other config file? I am using OC4J 904 on win2000 with oracle DB, would like to know how other EJB Servers doing on this issue? Thank you Mallik