somehttpstuffthatreturnsjson.js

/*
  We need to require the pupilplugin-creator
*/
var http                         = require('http')
  , pupilPlugin                  = require('../lib/pupilplugin')
  , somehttpstuffthatreturnsjson = new pupilPlugin()

/*
  setup is an optional function, that is used to configure the instanciated
  version of the plugin.  This is used to set configurational parameters.
*/
somehttpstuffthatreturnsjson.prototype.setup = function (config) {
  this._host = config.host;
  this._port = config.port;
  this._get = config.get;
  return;
};

/*
  hasPlugin runs once at startup.  This function is there to test if any 
  prerequisites for the plugin to run has been met - and should return an array
  of any available sets of data.
*/
somehttpstuffthatreturnsjson.prototype.test = function () {
  return ['datasett1','datasett2'];
};

/*
  runPlugin runs once every second.  It should call dispatch on its object to
  send data off its way.
*/
somehttpstuffthatreturnsjson.prototype.run = function () {
  var self = this;

  http.get({hostname: this._host, 
            port    : this._port,
            path    : this._get,
            agent:false},
            function (res) {
    res.on('data', function (json) {
      var o = JSON.parse(json);
      self.dispatch('datasett1', {
        type: 'gauge',
        draw: 'stacked',
        data: {
          foo    : o.foo,
          bar    : o.bar,
          baz    : o.baz
        }
      });
      self.dispatch('datasett2', {
        type: 'counter',
        draw: 'line',
        data: {
          hetti: o.hetti,
          netti: o.netti,
          letti: o.letti
        }
      });
    });
  });
};

module.exports = somehttpstuffthatreturnsjson;