Usage of Business Delegates/Intelligent DTO

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Usage of Business Delegates/Intelligent DTO

Usage of Business Delegates/Intelligent DTO

2004-10-11 - By Vijay Balakrishnan

Back
Hi,

I am working on a project with JSF being used for the View layer.The
Managed Bean/Action class in JSF is being used to call the Business Delegate
class.The Business Delegate class is also being used as an intelligent DTO
with all the fields corresponding to the Database and these fields in the
intelligent DTO/Business delegate are also being used as Bean fields in the
JSF pages for eg: value = "#{intelligentDto.firstName}.

This Business delegate also has methods to delegate calls to the actual
Service layer like service.addPrincipal() method.

These layers have been useful when using Tapestry as the view layer.But when
using JSF, it pollutes the Business delegate/Intelligent DTO with JSF
related classes like UIINput when using binding as an attribute on the JSF
layer.

What are the problems with using a Busines delegate like this and what can
be done to take care of the binding issue in JSF ?. Mind you- the architects
are entrenched in this intelligent JDO usage and there is no backing away
from this.

Thanks in advance,
Vijay

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