xapi-connector/lib/dispatcher.js

Simple low level connector for xAPI written in Coffeescript

// Generated by CoffeeScript 1.8.0

/*
The Dispatcher class.
It takes asynchronous requests to send something through the stream
and sends it asynchronously in intervals.
 */

(function() {
  var Dispatcher;

  Dispatcher = (function() {
    function Dispatcher(stream, delay, max_sins) {
      this.stream = stream;
      this.delay = delay != null ? delay : 0;
      this.max_sins = max_sins != null ? max_sins : 0;
      this._que = [];
      this._last = 0;
      this._clearing_que = false;
      this._sins = 0;
    }

    Dispatcher.prototype.add = function(msg) {
      this._que.push(msg);
      if (this._clearing_que === false) {
        this._clearQue();
      }
    };

    Dispatcher.prototype.getQue = function() {
      return this._que;
    };

    Dispatcher.prototype._clearQue = function() {
      var diff, msg;
      this._clearing_que = true;
      diff = new Date().getTime() - this._last;
      if (diff > this.delay || this._sins < this.max_sins) {
        this.stream.write(msg = this._que.shift());
        this._last = new Date().getTime();
        if (diff > this.delay) {
          if (this._sins > 0) {
            this._sins -= 1;
          }
        } else {
          this._sins += 1;
        }
        if (this._que.length > 0) {
          this._clearQue();
        } else {
          this._clearing_que = false;
        }
      } else {
        setTimeout(this._clearQue.bind(this), this.delay + 1 - diff);
      }
    };

    return Dispatcher;

  })();

  module.exports = Dispatcher;

}).call(this);