Which one between Session Facade and Business Delegate ?

[Rolando jimenze]

Hi all,
I have found very useful tips on this forum about part II.
I'm deciding what kind of facade will be presented to the client to hide the complexity of distributed components.
I have started using this appoach:

Servlet Controller->Business Delegate->Service Locator->DAO->Service

Some other guys on this forum have used Session Facade rather then the Business Delegate pattern. I wonder if they can be used together or
one exclude the other....
IMHO I cannot see a real difference between this two patterns....
Thanks
Rol

[Santiago Urrizola]

I think you are a litle confused

Servlet Controller -> BD -> Service Locator -> Facade -> DAO

or

Servlet Controller -> BD -> Service Locator -> Facade -> Entity -> DAO
(if you choose BMP)

[Ricardo Ferreira]

Try to read more the J2EE Design patterns catalog. I think that you're a little bit confused about patterns usage and a could be useful you read more.

Best Regards!

[Alex Li]

Hi,

The Business Delegate acts as a client-side business abstraction in web tier. It provides an abstraction and hide the implementation of accessing business services. Using a Business Delegate reduces the coupling between presentation-tier clients and the system's business services.

The Session Facade abstracts the underlying business object interactions and provides a service layer that exposes only the required interfaces. It is located in business logic tier.

So the two patterns can be used together without conflict.

Hope this help.