Benefits

• Decoupling: It decouples the sender of a request from the object that performs the request, allowing each to vary independently.
• Flexibility: Commands can be dynamically created, queued, logged, and undone, enabling more complex operations and interactions.
• Undo Operations: It supports undoable operations by storing the history of commands executed, making it easier to implement features like undo and redo.
• Composite Commands: Commands can be composed into complex commands, allowing for high-level abstractions and reusability.
• Logging and Auditing: Commands can log their operations, enabling auditing and debugging capabilities in the system.
• Simplifies Complex Systems: It simplifies the design of systems by breaking down functionality into discrete, encapsulated units, promoting easier maintenance and scalability.

Structure

• Command: Defines an interface for executing an operation. Typically, it declares a method like execute() that encapsulates the action to be performed.
• Concrete Command: Implements the Command interface and binds itself to a specific receiver (object that performs the operation).
• Invoker: Asks the command to carry out a request. It does not need to know about the command's receiver.
• Receiver: Knows how to perform the operations associated with carrying out a request.