command-interface.md

CommandInterface

The contract that all commands must implement to be processed by the command bus.

Overview

CommandInterface marker interface for Commands.

Class Definition

interface CommandInterface {}

Purpose

Commands serve as:

1. Data Transfer Objects - Carry data needed for a specific operation
2. Intent Declaration - Clearly express what operation should be performed

Usage Examples

Basic Command Implementation

use Webware\CommandBus\CommandInterface;

final readonly class CreateUserCommand implements CommandInterface
{
    public function __construct(
        public string $email,
        public string $username,
        public ?string $displayName = null,
        public array $roles = ['user']
    ) {}
}

Related Components

• CommandHandlerInterface - Handlers that process commands
• CommandBusInterface - Bus that dispatches commands
• MiddlewareInterface - Middleware that can intercept commands