Scale Code Example

/* ====================================================================
 * File: scale.js
 * Authors: Lee Cardona
 * Copyright (c) 2016 Nuvem Newtworks Inc.  All rights reserved.
 * ====================================================================
 */

var scale = {
  init                  : function () {
    scale.setValues()
    scale.bindEvents()
    scale.log('[ OK ] scale module loading completed...')
  },
  setValues             : function () {
    scale.common          = require('./common')
    scale.workers         = require('./workers')
    scale.requests        = require('./requests')
    scale.version         = scale.common.version
    scale.id              = scale.common.id
    scale.log             = scale.common.log
  },
  bindEvents            : function () {
    exports._id           = scale.id
    exports.version       = scale.version
    exports.main          = scale.main
  },
  main                  : function () {
    //REQUEST STATES = queued | processing | processed
    //WORKERS STATES = idle | working
    if ( scale.requests.queued.count > scale.workers.idle.count ) {
      //MORE REQUESTS THAN AVAILABLE WORKERS SCALE UP
      scale.workers.up( scale.requests.queued.count - scale.workers.idle.count )
      scale.workers.process(scale.requests.queued)
    } else if ( scale.requests.queued.count < scale.workers.idle.count ) {
      //MORE WORKERS THAN NEEDED SCALE DOWN
      scale.workers.down( scale.workers.idle.count - scale.requests.queued.count )
      scale.workers.process(scale.requests.queued)
    } else {
      //REQUESTS MATCH AVAILABLE WORKERS - NO SCALING NEEDED
      scale.workers.process(scale.requests.queued)
    }
  }
}
scale.init()