component.json

{
    "title":"Timer",
    "description" : "A task that can be scheduled for one-time or repeated execution by a Timer.",
    "fields":{
        "interval":{
            "viewClass":"SelectView",
            "label":"Interval",
            "required":true,
            "model":{
                "minute":"Every Minute",
                "hour":"Every Hour",
                "day":"Every Day"
            },
            "prompt":"Please select an interval"
        }
    },
    "triggers":{
        "timer":{
            "title":"Timer",
            "main":"./timer.js",
            "type": "polling",
            "metadata" : {
                "out" : {
                    "type" : "object",
                    "properties" : {
                        "fireTime" : {
                            "type" : "string",
                            "format" : "date-time",
                            "required" : true
                        }
                    }
                }
            }
        }
    }
}

timer.js

var clock = require('./clock.js');

exports.process = function (msg, conf, next, snapshot) {

    var interval = conf.interval,
        now = new Date().getTime(),
        nextStartTime = snapshot.time || now;

    if (nextStartTime <= now) {
        this.logger.info("Timer is about to start task execution scheduled for: %s", new Date(nextStartTime));

        var nextTime = clock.nextTime(interval);

        this.logger.info("Next timer event will be fired shortly after : %s", new Date(nextTime));

        var newSnapshot = {
            time : nextTime.getTime()
        };
        var body = {
            fireTime : new Date(now)
        };

        msg.body = body;

        next(null, msg, newSnapshot);
    } else {
        this.logger.debug("It is too early to trigger timer event, next event should be triggered shortly after %s", new Date(nextStartTime));
        next();
    }
};