dispatch.js

/**!
 * yanzhi - dispatch.js
 */

'use strict';

/**
 * Module dependencies.
 */

var path = require('path');
var util = require('util');
var config = require('./config');
var workerPath = path.join(__dirname, 'worker.js');

if (config.enableCluster) {
  var cluster = require('cluster');
  var os = require('os');

  cluster.setupMaster({
    exec: workerPath
  });

  cluster.on('fork', function (worker) {
    console.log('[%s] [worker:%d] new worker start', Date(), worker.process.pid);
  });

  cluster.on('disconnect', function (worker) {
    var w = cluster.fork();
    console.error('[%s] [master:%s] wroker:%s disconnect, suicide: %s, state: %s. New worker:%s fork',
      Date(), process.pid, worker.process.pid, worker.suicide, worker.state, w.process.pid);
  });

  cluster.on('exit', function (worker, code, signal) {
    var exitCode = worker.process.exitCode;
    var err = new Error(util.format('worker %s died (code: %s, signal: %s, suicide: %s, state: %s)',
      worker.process.pid, exitCode, signal, worker.suicide, worker.state));
    err.name = 'WorkerDiedError';
    console.error('[%s] [master:%s] wroker exit: %s', Date(), process.pid, err.stack);
  });

  // Fork workers.
  var numCPUs = os.cpus().length;
  for (var i = 0; i < numCPUs; i++) {
    cluster.fork();
  }

} else {
  require(workerPath);
}