code: protected void update() {
  		_updated = true;
  		if (System.currentTimeMillis() > _lastDumpTime + _interval) {
  			try {
  				dump();
  			} catch (InvocationException ex) {
  				// Todo: decide what to do
  			}
  		}
  	}
docs: Makes counter measurements as updated and dumps them when timeout expires.
  
  @see #dump()