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August 10, 2006

Contract driven communication

Pete, Manoj, Alex and I went for coffee today. It was just after we had spent a couple hours testing the new version of Salesforce.com that we are getting ready to deploy. One of the topics that Pete has been talking about lately is contract driven services, should they be client driven or server driven?

He had a key insight today which is: although our service is server contract driven, our query languages (SOQL/SOSL) force/allow clients to declare what data and fields the client is interested in. "SELECT * FROM account" is illegal, but "SELECT id,name FROM account" is legal.

So clients must declare what data they are interested in. The server defines the total space of data but the client can protect itself from additive changes to the data objects by directly requesting the objects and fields.

So we have a very flexible client driven, server declared contract system.

Posted by Chris at August 10, 2006 08:05 PM

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