Command Handlers

Command Handlers are granular services that handle incoming commands from the external world. Handlers map one-to-one to Commands, and usually process the command with an awareness of how the sender needs to receive the response.

Command Handlers are very similar in function to Application Services. Where as Application Services are more generic as a concept and applicable to all Domain modeling scenarios,Commands and Command Handlers are part of applications designed to leverage the CQRS architecture pattern.