Design Patterns MCP Server

{ "id": "actor-model", "name": "Actor Model", "category": "Concurrency", "description": "Concurrent computation based on isolated actors communicating via messages", "when_to_use": "Distributed systems\nFault tolerance\nScalable concurrency", "benefits": "Isolation\nFault tolerance\nScalability\nNo shared state", "drawbacks": "Learning curve\nMessage overhead\nComplex debugging", "use_cases": "Distributed systems\nReal-time systems\nIoT applications", "complexity": "High", "tags": [ "concurrency", "actors", "messaging" ], "examples": { "typescript": { "language": "typescript", "code": "// Actor Model: isolated concurrent entities with message passing\ntype Message = { type: string; data: any };\n\nclass Actor {\n private mailbox: Message[] = [];\n private processing = false;\n \n async send(message: Message): Promise<void> {\n this.mailbox.push(message);\n if (!this.processing) {\n this.processMessages();\n }\n }\n \n private async processMessages() {\n this.processing = true;\n \n while (this.mailbox.length > 0) {\n const message = this.mailbox.shift()!;\n await this.receive(message);\n }\n \n this.processing = false;\n }\n \n protected async receive(message: Message): Promise<void> {\n // Override in subclass\n }\n}\n\nclass CounterActor extends Actor {\n private count = 0;\n \n protected async receive(message: Message) {\n switch (message.type) {\n case 'increment':\n this.count++;\n console.log('Count:', this.count);\n break;\n case 'get':\n message.data.resolve(this.count);\n break;\n }\n }\n}\n\n// Usage\nconst counter = new CounterActor();\ncounter.send({ type: 'increment', data: null });\ncounter.send({ type: 'increment', data: null });\n\nconst count = await new Promise(resolve => \n counter.send({ type: 'get', data: { resolve } })\n);" } } }