Business Concept Modeling (Contd...)

Component Encapsulation:

• No direct data access from outside the component

• All communication through request defined in an interface

• Data representation internal to the implementation of each component
   

Role of Connectors:

• Define external view of data and leave the internal implementation to each component designer.

• Adaptor: Wrapper to translate from internal representation to common external format.
   

An Example:

Services provided by a component are defined as parameterized requests

1. Charge $10 for Order 534 to Customer Joe

2. Process a Customer payment