Design Patterns MCP Server

{ "id": "command", "name": "Command", "category": "Behavioral", "description": "Encapsulates requests as objects, allowing parameterization and queuing", "when_to_use": "Undo/redo\nQueuing operations\nLogging", "benefits": "Decoupling\nUndo support\nMacro recording", "drawbacks": "Increased number of classes\nComplexity", "use_cases": "Undo/redo\nMacro recording\nMessage queues", "complexity": "Medium", "tags": [ "behavioral", "encapsulation", "request" ], "examples": { "typescript": { "language": "typescript", "code": "interface Command {\n execute(): void;\n undo(): void;\n}\n\nclass Light {\n on() { console.log('Light on'); }\n off() { console.log('Light off'); }\n}\n\nclass LightOnCommand implements Command {\n constructor(private light: Light) {}\n execute() { this.light.on(); }\n undo() { this.light.off(); }\n}\n\nclass RemoteControl {\n private history: Command[] = [];\n execute(cmd: Command) { cmd.execute(); this.history.push(cmd); }\n undo() { this.history.pop()?.undo(); }\n}\n\n// Usage: encapsulate requests as objects\nconst remote = new RemoteControl();\nremote.execute(new LightOnCommand(new Light()));" } } }