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CQRS and Event Sourcing represent an approach to building business systems that draws heavily on Domain Driven Design while avoiding tedious Object Relational Mapping and many other difficulties with common application development approaches.
A command is a serialised method call that capture the intent of the user. It is always expressed in the imperative, e.g. "Make Payment", "Ship Goods", etc.
It is important to note that commands can be rejected by the application based on any number of validations, including permissions, concurrency issues, data validation, etc.
This concept map is owned by jimmyjazz68
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