running a cron in nodejs

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running a cron in nodejs

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#1 by (0 votes)

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I use the cron library to run the following snippet of code

pepinosModelo.find()
  .exec()
  .then(pepinos => {

    pepinos.forEach(pepino => {

      let frecuencia = pepino.frecuente();
      let nuevoTrans = [{
        chocolate:true,
        abena:"de dos a tres porcines",
        lsd: "No aplica"
      }];


      nuevoTrans.push({
        chocolate:false,
        coco:"Completo",
        lsd: "Aplica"
      });

      return TransModel.create(nuevoTrans)
      .then((trans) => {

        fumadorModelo
        .update({
          pepino: pepino._id
        }, { 
          'comprador': false,
          'nuevaDocis': zero 
        })
        .exec()
        .then((usuario) => { 
          pepino.cambio += frecuencia;
          pepino.balance = zero;
          pepino.puntos = zero;
          return pepino
          .save()
          .then(() => {
            console.log(´fin actualizacion usuario ciclo ${usuario}´);
          });
        });
      });
    });
  });

and to run it I do it this way

  try{
  // let when = '00 30 11 1-2 * *';
  // let timeZone = '';
  let when = '* 10 * * * *';

  new CronJob({
    cronTime: when,
    onTick: cronFn,
    start: true,
    // timeZone
  });

}catch(err) {
  console.error('something happening with cron:', err);
}

The issue is that I'm not so sure if you run the task several times or just once
Could this saturate the server depending on the number of documents in the cucumber collection?
What happens if you fail to update or create a document

nodejs cron

asked by soldat25 31.01.2017 в 21:49

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1 answer

Wrong number of parameters MKDIR in windows

score 0 · Answer 1

According to your cron pattern, it runs every 30 minutes.

If you want to know how many times you run, add logs and check them.
I do not know what you are using to bring your documents, but I recommend you make a page so that it does not break, because if you bring 1 million records it is more likely to happen depending on the server
If the update or creation fails, I should throw you a warning by console since what I see is not using any catch

1.) First I recommend that you bring the content page

2.) You create a separate function with Promise to do the creation and the update and once it is finished do the resolve.

3.) Then I recommend that your for just do the inserts in nuevaTrans with the promise of that function.

4.) With that list do a Promise.all

I would seem much neater and more aligned to ES6