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        if (!m) continue;
        h = this.handlers[m.type];
        if (!h) h = this.handlers['*'];
        if ( h) h(m);
      }
    },

    /* Method: stop
     *
     * Stop the loop
     *
     */
    stop: function() {
      if (this.xhr) {
        this.xhr.abort();
        this.xhr = null;
      }
      this.running = false;
    },

    /*
     * Method: loop
     *
     * Long poll on a URL
     *
     * Arguments:
     *
     *   url
     *   handler
     *
     */
    loop: function(url, handlers) {
      var self = this;
      if (handlers) {
        if (typeof handlers == "object") {
			this.handlers = handlers;
        } else if (typeof handlers == "function") {
			this.run = handlers;
        } else {
			throw("handlers must be an object or function");
        }
      }
      this.running = true;
      this.xhr = $.ajax({
        type     : 'GET',
        dataType : 'json',
        url      : url,
        timeout  : self.timeout,
		cache    : false,
        success  : function(messages, status) {
            self.run(messages);
        },
        complete : function(xhr, status) {
			var delay;
			if (status == 'success') {
				delay = 100;
			} else {
				delay = 5000;
			}
			// "recursively" loop
			window.setTimeout(function(){ 
				if (self.running) 
					self.loop(url);
			}, delay);
        }
      });
    }

  };

})(jQuery);