agneta-platform/main/server/cluster/worker.js

Agneta Platform - Integrate and customize business applications

/*   Copyright 2017 Agneta Network Applications, LLC.
 *
 *   Source file: main/server/cluster/worker.js
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
const express = require('express');
const loopback = require('loopback');
const chalk = require('chalk');
const Promise = require('bluebird');
const EventEmitter = require('events').EventEmitter;

Promise.config({
  // Enables all warnings except forgotten return statements.
  warnings: {
    wForgottenReturn: false
  }
});


module.exports.run = function(worker) {

  var app;
  var server;
  var emitter = new EventEmitter();


  switch (process.env.MODE) {
    case 'pages':
      app = express();
      server = require('../pages');
      break;
    case 'services':
      app = loopback();
      server = require('../services');
      break;
    case 'live':
      app = loopback();
      server = require('../live');
      break;
    case 'portal':
      app = express();
      server = require('../portal');
      break;
    default:
      throw new Error('Unrecognized process mode:', process.env.MODE);
  }

  //--------------------------------

  var httpServer = worker.httpServer;
  var starting = true;
  httpServer.on('request', app);

  app.set('trust proxy', 1);

  app.use(function(req, res, next) {
    if (starting) {
      emitter.on('available', next);
      return;
    }
    next();
  });

  Promise.resolve()
    .then(function() {

      return server({
        worker: worker,
        server: httpServer,
        app: app
      });
    })
    .then(function(result) {
      starting = false;
      console.log(chalk.bold.green('Application is available'));
      emitter.emit('available');
      worker.sendToMaster({
        started: true,
        result: result
      });

    });

};