Chapter 3 Service Endpoint Design

99

Service Interaction Layer

Service Processing Layer

Web Service Endpoint

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Figure 3.9

Web Service Response Processing

However, it is not good design to have a different implementation of the ser 

vice's logic for each client type. Rather, it is better to design a common business

logic for all client types. Then, in the interaction layer, transform the results per

client type for rendering. It is thus important to consider the above guidelines,

especially when your service has a common processing logic but potentially has

different response rendering needs to fit its varied client types.

3.5

Processing Layer Design

The processing layer is where the business logic is applied to a Web service request.

Recall that Web service is an interoperable way to expose new or existing applica 

tions. Hence, regardless of the means you use to expose your application's function 

ality, the business logic design issues are the same. You must still design the

business logic by considering such issues as using enterprise beans, exposing a local

or a remote EJB interface model, using container managed or bean managed persis 

tence, and so forth.