Re: Client/Service relationships & Flow of Requirements.

Responding to Daniel T....

However, I changed my tune when I started using messages to inform an object of external conditions, rather than using it to produce wanted output. Then I ended up with a service that has methods which must be called when particular external conditions are met. That's something that doesn't fit well with DbC nor with HS' remarks. When using messages in this way, changes in the service can force client changes.

I don't see why there would be a problem. [Of course I use object state machines for /all/ behavior responsibilities so my behaviors are /always/ triggered by events announcing changes in external conditions. B-)] Do you have an example that demonstrates the problem?


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