Re: question about component integration or assembly

Responding to Liongster...

I am still new to this component concept.
At this stage, I have a question about the concept and the
implementation of the components when they are combined or integrated
or assemblied with other components.

Which component concept is that? B-) Alas, component engineering is taking on as many different methodological views as OOA/D.


If we are a developer of a client application and wants to use
component X and Y.
The definition of component allows components be connected to each
other. I could understand how my client application would be connected
to component X and Y. However how could we connect X to Y, if don't
have the source code of X and Y?

The short answer is that you don't. The component is a module with a particular semantic responsibility that is abstracted by its interface for various clients to use. That interface encapsulates its implementation so that it is none of the clients' business how it delivers on its advertised semantics. So if X needs to talk to Y, then that is a problem for the implementer of X, not the user of X.

IOW, it is best to think of components as a bunch of standalone black boxes that provide logically indivisible services. All the client cares about is the service that the particular component is responsible for providing. So if the client needs the services of both X and Y in some particular sequence, the client should invoke those services directly from both in the proper sequence.


--
There is nothing wrong with me that could
not be cured by a capful of Drano.

H. S. Lahman
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Pathfinder Solutions
http://www.pathfindermda.com
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