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Wednesday Apr 13, 2011

CQRS and command validation

During the implementation of our CQRS-based application, we initially had discussions where the validation of the commands needs to reside (client side versus command objects) and the precise distinction between validation and business rules. Today I found an excellent post, titled Clarified CQRS, that very concisely and very accurately addresses these issues and more. A lengthy, but very worthwhile post, with over 100 comments already. I surely recommend anybody interested in CQRS to check this post out.

Concluding: applying the CQRS pattern forced us to think over these concepts thoroughly from the start, which is now reflected in an even more robust and maintainable application.

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