'use strict'
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const fs = require('fs')
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const started = Date.now()
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module.exports = function (timeout, callback) {
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callback = callback.bind(null, null, process.pid, Math.random(), timeout)
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if (timeout)
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return setTimeout(callback, timeout)
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callback()
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}
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module.exports.args = function (callback) {
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callback(null, {
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argv : process.argv
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, cwd : process.cwd()
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, execArgv : process.execArgv
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})
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}
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module.exports.run0 = function (callback) {
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module.exports(0, callback)
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}
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module.exports.killable = function (id, callback) {
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if (Math.random() < 0.5)
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return process.exit(-1)
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callback(null, id, process.pid)
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}
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module.exports.err = function (type, message, data, callback) {
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if (typeof data == 'function') {
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callback = data
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data = null
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} else {
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let err = new Error(message)
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Object.keys(data).forEach(function(key) {
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err[key] = data[key]
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})
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callback(err)
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return
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}
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if (type == 'TypeError')
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return callback(new TypeError(message))
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callback(new Error(message))
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}
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module.exports.block = function () {
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while (true);
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}
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// use provided file path to save retries count among terminated workers
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module.exports.stubborn = function (path, callback) {
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function isOutdated(path) {
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return ((new Date).getTime() - fs.statSync(path).mtime.getTime()) > 2000
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}
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// file may not be properly deleted, check if modified no earler than two seconds ago
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if (!fs.existsSync(path) || isOutdated(path)) {
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fs.writeFileSync(path, '1')
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process.exit(-1)
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}
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let retry = parseInt(fs.readFileSync(path, 'utf8'))
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if (Number.isNaN(retry))
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return callback(new Error('file contents is not a number'))
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if (retry > 4) {
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callback(null, 12)
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} else {
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fs.writeFileSync(path, String(retry + 1))
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process.exit(-1)
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}
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}
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module.exports.uptime = function (callback) {
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callback(null, Date.now() - started)
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}
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