81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
'use strict';
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const fork = require('child_process').fork;
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const log = require('./log');
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const path = require('path');
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const bluebird = require('bluebird');
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const requestCallbacks = {};
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let messageTid = 0;
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let executorProcess;
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function spawn(callback) {
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log.verbose('Executor', 'Spawning executor process');
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executorProcess = fork(path.join(__dirname, '..', 'services', 'executor.js'), [], {
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cwd: path.join(__dirname, '..'),
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env: {NODE_ENV: process.env.NODE_ENV}
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});
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executorProcess.on('message', msg => {
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if (msg) {
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if (msg.type === 'process-started') {
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let requestCallback = requestCallbacks[msg.tid];
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if (requestCallback && requestCallback.startedCallback) {
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requestCallback.startedCallback(msg.tid, );
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}
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} else if (msg.type === 'process-failed') {
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let requestCallback = requestCallbacks[msg.tid];
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if (requestCallback && requestCallback.failedCallback) {
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requestCallback.failedCallback(msg.msg);
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}
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delete requestCallbacks[msg.tid];
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} else if (msg.type === 'process-finished') {
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let requestCallback = requestCallbacks[msg.tid];
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if (requestCallback && requestCallback.startedCallback) {
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requestCallback.finishedCallback(msg.code, msg.signal);
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}
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delete requestCallbacks[msg.tid];
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} else if (msg.type === 'executor-started') {
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log.info('Executor', 'Executor process started.');
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return callback();
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}
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}
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});
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executorProcess.on('close', (code, signal) => {
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log.info('Executor', 'Executor process exited with code %s signal %s', code, signal);
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});
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}
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function start(type, data, startedCallback, finishedCallback, failedCallback) {
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requestCallbacks[messageTid] = {
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startedCallback,
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finishedCallback,
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failedCallback
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};
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executorProcess.send({
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type: 'start-' + type,
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data,
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tid: messageTid
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});
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messageTid++;
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}
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function stop(tid) {
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executorProcess.send({
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type: 'stop-process',
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tid
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});
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}
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module.exports.spawn = bluebird.promisify(spawn);
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module.exports.start = start;
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module.exports.stop = stop;
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