Command Pattern

• The command pattern allow us to craft a uniform interface, known as an Invoker, that issues commands which encapsulate the inner workings of the operation
• The invoker must expose an execute method that accepts a command and executes its internal execute function
• Commands act on a reciever, which receives the outcome of an action
• The invoker may also provide with the ability to undo operations
• This pattern allows you to write diverse set of operations, without affecting or refactoring the invoker interface, used by the client