one/dist/esm/cli/workerPool.mjs.map

One is a React framework for web, iOS, and Android apps.

{"version":3,"file":"workerPool.js","names":[],"sources":["esm/cli/workerPool.js"],"sourcesContent":["import { Worker } from \"node:worker_threads\";\nimport { cpus } from \"node:os\";\nimport { fileURLToPath } from \"node:url\";\nimport { dirname, join } from \"node:path\";\nconst workerDirectory = typeof __dirname === \"string\" ? join(__dirname, \"..\", \"..\", \"esm\", \"cli\") : dirname(fileURLToPath(import.meta.url));\nclass BuildWorkerPool {\n  workers = [];\n  available = [];\n  taskQueue = [];\n  pendingById = /* @__PURE__ */ new Map();\n  nextId = 0;\n  readyCount = 0;\n  initCount = 0;\n  _ready;\n  _resolveReady;\n  _initialized;\n  _resolveInitialized;\n  _terminated = false;\n  constructor(size = Math.max(1, cpus().length - 1)) {\n    this._ready = new Promise((resolve) => {\n      this._resolveReady = resolve;\n    });\n    this._initialized = new Promise((resolve) => {\n      this._resolveInitialized = resolve;\n    });\n    const workerPath = join(workerDirectory, \"buildPageWorker.mjs\");\n    for (let i = 0; i < size; i++) {\n      const worker = new Worker(workerPath);\n      worker.on(\"message\", (msg) => {\n        if (msg.type === \"ready\") {\n          this.readyCount++;\n          this.available.push(worker);\n          if (this.readyCount === size) {\n            this._resolveReady();\n          }\n        } else if (msg.type === \"init-done\") {\n          this.initCount++;\n          if (this.initCount === size) {\n            this._resolveInitialized();\n          }\n          this.dispatch();\n        } else if (msg.type === \"done\" || msg.type === \"error\") {\n          const pending = this.pendingById.get(msg.id);\n          if (pending) {\n            this.pendingById.delete(msg.id);\n            if (msg.type === \"done\") {\n              pending.resolve(msg.result);\n            } else {\n              pending.reject(new Error(msg.error));\n            }\n          }\n          this.available.push(worker);\n          this.dispatch();\n        }\n      });\n      worker.on(\"error\", (err) => {\n        console.error(\"[BuildWorkerPool] Worker error:\", err);\n      });\n      this.workers.push(worker);\n    }\n  }\n  get size() {\n    return this.workers.length;\n  }\n  // initialize all workers with pre-loaded config from main thread\n  async initialize(oneOptions) {\n    await this._ready;\n    for (const worker of this.workers) {\n      worker.postMessage({ type: \"init\", id: this.nextId++, oneOptions });\n    }\n    await this._initialized;\n  }\n  dispatch() {\n    while (this.available.length > 0 && this.taskQueue.length > 0) {\n      const worker = this.available.shift();\n      const { msg, pending } = this.taskQueue.shift();\n      this.pendingById.set(pending.id, pending);\n      worker.postMessage(msg);\n    }\n  }\n  async buildPage(args) {\n    if (this._terminated) {\n      throw new Error(\"Worker pool has been terminated\");\n    }\n    const serializedRoute = {\n      type: args.foundRoute.type,\n      file: args.foundRoute.file,\n      // only keep serializable layout data\n      layouts: args.foundRoute.layouts?.map((layout) => ({\n        contextKey: layout.contextKey,\n        loaderServerPath: layout.loaderServerPath,\n        layoutRenderMode: layout.layoutRenderMode\n      })),\n      // only keep contextKey from middlewares\n      middlewares: args.foundRoute.middlewares?.map((mw) => ({\n        contextKey: mw.contextKey\n      }))\n    };\n    const id = this.nextId++;\n    const msg = {\n      type: \"build\",\n      id,\n      args: {\n        ...args,\n        foundRoute: serializedRoute\n      }\n    };\n    return new Promise((resolve, reject) => {\n      const pending = {\n        id,\n        resolve: (result) => resolve({ ...result, cssContents: args.allCSSContents }),\n        reject\n      };\n      this.taskQueue.push({ msg, pending });\n      this.dispatch();\n    });\n  }\n  async terminate() {\n    this._terminated = true;\n    await Promise.all(this.workers.map((w) => w.terminate()));\n    this.workers = [];\n    this.available = [];\n  }\n}\nlet pool = null;\nfunction getWorkerPool(size) {\n  if (!pool) {\n    pool = new BuildWorkerPool(size);\n  }\n  return pool;\n}\nasync function terminateWorkerPool() {\n  if (pool) {\n    await pool.terminate();\n    pool = null;\n  }\n}\nexport {\n  BuildWorkerPool,\n  getWorkerPool,\n  terminateWorkerPool\n};\n//# 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