The feature of tick-tuple

["jamesweb3@yahoo.com.tw" <ja...@yahoo.com.tw>]

Hi, allI use this feature to dump my result to database for a period of time. But sometimes there is no data(normal tuple) to get into my topology, storm still sends tick-tuple so that it always dump to database. Is there a way if no normal tuple, storm will not send the tick-tuple?


James Fu

Re: The feature of tick-tuple

[Stephen Armstrong <st...@linqia.com>]

Could you not just keep a flag in each bolt to keep track?

boolean sawData;

execute(Tuple tuple) {
  if (isTick(tuple)) {
    if (sawData) {
      sawData = false;
... dump to database...
    }
  } else { // Not a tick tuple
      sawData = true;
      ... do rest of processing ...
   }
}



On Thu, Jul 10, 2014 at 7:49 PM, jamesweb3@yahoo.com.tw <
jamesweb3@yahoo.com.tw> wrote:

>  Hi, all
> I use this feature to dump my result to database for a period of time. But
> sometimes there is no data(normal tuple) to get into my topology, storm
> still sends tick-tuple so that it always dump to database. Is there a way
> if no normal tuple, storm will not send the tick-tuple?
>
>
> James Fu
>
>