librato-node/lib/worker.js

A node.js client for Librato Metrics (http://metrics.librato.com/)

// Generated by CoffeeScript 1.12.7
(function() {
  var Worker;

  Worker = (function() {
    Worker.prototype.period = 60000;

    function Worker(arg) {
      var period, ref;
      ref = arg != null ? arg : {}, this.job = ref.job, period = ref.period;
      if (this.job == null) {
        throw new Error('must provide job');
      }
      if (period != null) {
        this.period = period;
      }
      this.stopped = true;
    }

    Worker.prototype.start = function() {
      var nextRun, workFn;
      this.stopped = false;
      nextRun = Worker.startTime(this.period);
      workFn = (function(_this) {
        return function() {
          var now;
          while (true) {
            now = Date.now();
            if (now >= nextRun) {
              _this.job();
              while (nextRun <= now) {
                nextRun += _this.period;
              }
            } else {
              _this.timerId = setTimeout(workFn, Math.min(nextRun - now, _this.period));
              return;
            }
          }
        };
      })(this);
      return workFn();
    };

    Worker.prototype.stop = function() {
      if (this.stopped) {
        return;
      }
      this.stopped = true;
      if (this.timerId != null) {
        return clearTimeout(this.timerId);
      }
    };

    Worker.startTime = function(period) {
      var now;
      now = Date.now();
      return now + (period - (now % period));
    };

    return Worker;

  })();

  module.exports = Worker;

}).call(this);

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