amitkumarpadhy

 Profile Answers by amitkumarpadhy 

• Jun 13th, 2008

 

Java Helper class is one that your class under consideration delegates the work to be done to . Example. Consider an n tier application where Struts is the presentation layer . Now generally the Action Classes are not resposible to carry out the business logic of the appplication so they rely on the helper classes to carry out the business functionality .

Session Facade comes into picture in case of some design pattern where we want to hide up a complexity using a higher level layer. It is a higher lever component which contains and centralizes complext interaction between lower level components . Generally it is implemented by use of session beans.