Producer event emiting about godot HOT 3 OPEN

/*
 * A godot probe to retrieve the memory state
 * of a Linux system.
 */

var fs = require('fs')
  , godot = require('godot');

//
// Get a proper producer instance
//
var linuxSysCPU = godot.producer({
    host: 'monitor.foo.bar',
    service: 'server/health/cpu',
    description: 'CPU usage',
    tags: ['CPU','server'],
    ttl: 1000 * 30,
});

//
// Override data emission
//
linuxSysCPU.produce = function () {
    /**
     * Read a file and extract the last minute load average.
     *
     * /proc/loadavg may contain some datas like `0.43 0.62 0.52 1/519 7418`
     * first value is the load average of last minute, second val stand for 5mn, 
     * and third val for 15mn.
     */
    fs.readFile('/proc/loadavg', 'ascii', function(err, data) {
        if (err) throw err;
        var m = data.match(/^([\w\.]*)\s/);

        // Measure in %
        var measure = {
            cpuload: parseFloat(m[1], 10)
        };

        // Get current state
        var state = 'ok';
        if (measure.mem > 70 || measure.swap > 70) state = 'warning'
        else if (measure.mem > 90 || measure.swap > 90) state = 'critical'

        // Emit the event to reactor server
        this.emit('data', {
            host:        this.values.host,
            service:     this.values.service,
            state:       state,
            time:        Date.now(),
            description: this.values.description,
            tags:        this.values.tags,
            meta:        measure,
            metric:      this.values.metric,
            ttl:         this.values.ttl
        });
    }); 
};