duplicates events on recognition service

[alronz]

I am using the recognition services and I get duplicates events when I call any function of the recognition service (train, getTags, etc ..) more than once. For example: the below code:

 matrix.service('recognition').getTags()
          .then((tags) => {
            console.log('tags results');
          })

Will produce "tags results" twice on the second time if I call the above function twice.

I guess the problem is from the below line: https://github.com/matrix-io/matrix-os/blob/dev/apps/lib/service.js#L192

It seems this problem is similar to the below issue: https://github.com/nodejs/node-v0.x-archive/issues/2475

I have tried changing the above to process.once and it worked.

For now in my code I just use the below after calling any function from the recognition service: process.removeAllListeners('message');

I hope you fix it soon if you think it makes sense.

Thanks !

[gordinh]

Hi @alronz thanks for the help. I've just merged to dev, fixing this. Yes, the once makes more sense and stop this duplicates. Thanks :)