Simple Counter/Timer Statsd Node Client

statsd.js

var dgram = require('dgram');

module.exports = function (port, host) {
  return new function() {
    this._host = host || '127.0.0.1';
    this._port = port || 8125;
    this._client = dgram.createSocket("udp4");

    this._send = function (message) {
      console.log('STATSD', message);
      var buffer = new Buffer(message);
      this._client.send (buffer, 0, buffer.length, this._port, this._host);
    }

    this.counter = function (name, value) {
      value = value || 1;
      var message = this._counterMessage(name, value);
      this._send (message);
    };

    this.timer = function (name, duration) {
      var self = this;

      // if duration is not passed in, return an object that
      // has an end function that can be called.
      if (!duration) {
        var start = Date.now();

        return new function () {
          this.end = function () {
            var duration = Date.now() - start;
            var message = self._timerMessage(name, duration);
            self._send(message);
          }
        }
      }
      else {
        var message = self._timerMessage(name, duration);
        self._send(message);
      }
    };

    this._timerMessage = function (name, duration) {
      return name + ':' + duration + '|ms';
    };

    this._counterMessage = function (name, value) {
      return name + ':' + value + '|c';
    };
  }
}