117 lines
3.3 KiB
JavaScript
117 lines
3.3 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
Object.defineProperty(exports, '__esModule', {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.default = void 0;
|
||
|
|
function _mergeStream() {
|
||
|
|
const data = _interopRequireDefault(require('merge-stream'));
|
||
|
|
_mergeStream = function () {
|
||
|
|
return data;
|
||
|
|
};
|
||
|
|
return data;
|
||
|
|
}
|
||
|
|
var _types = require('../types');
|
||
|
|
function _interopRequireDefault(obj) {
|
||
|
|
return obj && obj.__esModule ? obj : {default: obj};
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the MIT license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree.
|
||
|
|
*/
|
||
|
|
|
||
|
|
// How long to wait for the child process to terminate
|
||
|
|
// after CHILD_MESSAGE_END before sending force exiting.
|
||
|
|
const FORCE_EXIT_DELAY = 500;
|
||
|
|
|
||
|
|
/* istanbul ignore next */
|
||
|
|
// eslint-disable-next-line @typescript-eslint/no-empty-function
|
||
|
|
const emptyMethod = () => {};
|
||
|
|
class BaseWorkerPool {
|
||
|
|
_stderr;
|
||
|
|
_stdout;
|
||
|
|
_options;
|
||
|
|
_workers;
|
||
|
|
constructor(workerPath, options) {
|
||
|
|
this._options = options;
|
||
|
|
this._workers = new Array(options.numWorkers);
|
||
|
|
const stdout = (0, _mergeStream().default)();
|
||
|
|
const stderr = (0, _mergeStream().default)();
|
||
|
|
const {forkOptions, maxRetries, resourceLimits, setupArgs} = options;
|
||
|
|
for (let i = 0; i < options.numWorkers; i++) {
|
||
|
|
const workerOptions = {
|
||
|
|
forkOptions,
|
||
|
|
idleMemoryLimit: this._options.idleMemoryLimit,
|
||
|
|
maxRetries,
|
||
|
|
resourceLimits,
|
||
|
|
setupArgs,
|
||
|
|
workerId: i,
|
||
|
|
workerPath
|
||
|
|
};
|
||
|
|
const worker = this.createWorker(workerOptions);
|
||
|
|
const workerStdout = worker.getStdout();
|
||
|
|
const workerStderr = worker.getStderr();
|
||
|
|
if (workerStdout) {
|
||
|
|
stdout.add(workerStdout);
|
||
|
|
}
|
||
|
|
if (workerStderr) {
|
||
|
|
stderr.add(workerStderr);
|
||
|
|
}
|
||
|
|
this._workers[i] = worker;
|
||
|
|
}
|
||
|
|
this._stdout = stdout;
|
||
|
|
this._stderr = stderr;
|
||
|
|
}
|
||
|
|
getStderr() {
|
||
|
|
return this._stderr;
|
||
|
|
}
|
||
|
|
getStdout() {
|
||
|
|
return this._stdout;
|
||
|
|
}
|
||
|
|
getWorkers() {
|
||
|
|
return this._workers;
|
||
|
|
}
|
||
|
|
getWorkerById(workerId) {
|
||
|
|
return this._workers[workerId];
|
||
|
|
}
|
||
|
|
createWorker(_workerOptions) {
|
||
|
|
throw Error('Missing method createWorker in WorkerPool');
|
||
|
|
}
|
||
|
|
async end() {
|
||
|
|
// We do not cache the request object here. If so, it would only be only
|
||
|
|
// processed by one of the workers, and we want them all to close.
|
||
|
|
const workerExitPromises = this._workers.map(async worker => {
|
||
|
|
worker.send(
|
||
|
|
[_types.CHILD_MESSAGE_END, false],
|
||
|
|
emptyMethod,
|
||
|
|
emptyMethod,
|
||
|
|
emptyMethod
|
||
|
|
);
|
||
|
|
|
||
|
|
// Schedule a force exit in case worker fails to exit gracefully so
|
||
|
|
// await worker.waitForExit() never takes longer than FORCE_EXIT_DELAY
|
||
|
|
let forceExited = false;
|
||
|
|
const forceExitTimeout = setTimeout(() => {
|
||
|
|
worker.forceExit();
|
||
|
|
forceExited = true;
|
||
|
|
}, FORCE_EXIT_DELAY);
|
||
|
|
await worker.waitForExit();
|
||
|
|
// Worker ideally exited gracefully, don't send force exit then
|
||
|
|
clearTimeout(forceExitTimeout);
|
||
|
|
return forceExited;
|
||
|
|
});
|
||
|
|
const workerExits = await Promise.all(workerExitPromises);
|
||
|
|
return workerExits.reduce(
|
||
|
|
(result, forceExited) => ({
|
||
|
|
forceExited: result.forceExited || forceExited
|
||
|
|
}),
|
||
|
|
{
|
||
|
|
forceExited: false
|
||
|
|
}
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.default = BaseWorkerPool;
|