Hi,
   I am trying to implement Session Facade design pattern. Here my stateless session bean(SLSB) delegate call to CMPs.
Do I need to use separate SLSB for each CMP or what if I have one SLSB which delegate to all CMP's? Please let me know which is better performance wise.

Thanks in advance
Prasanna

It depends on the jobs you want to implement. In general you can call from a Session Bean several Entity Beans in case these are responsible for related data. You can look for an example inside Floyd Marinescu's EJB Design Patterns, chapter "From Requirements to Pattern-Driven Design" where you will see that each Session Bean implements a specific job and these Session Beans call the Entity Beans.

You can organize your session facades in any way logical for your application. Performance-wise, it does not make much difference how many methods are assigned to a particular session bean. Group methods into different session beans based on which operations make logical sense together. These methods can use a handful of CMP or a bunch of CMP.