So far we got acquired with a theorythat stands behind the CQRS and Event Sourcing. Moreover, we implementeda (business) heart of our calendar application consisting of a domain objects. Today we are going to reveal next two pieces of our puzzle – Commands and Command Handlers. Once again, I encourage you to share your opinions and suggestions in the comments (if you have any).  Commands So, what exactly the commands are? In short, these objects represent intentions of a user. They are in fact imperati...