Promises: Repeat operation until it succeeds?

Question

I want to perform an operation repeatedly, with an increasing timeout between each operation, until it succeeds or a certain amount of time elapses. How do I structure this

Answer 1

My sugesstion would be to use the bluebird-retry library

To install

npm i bluebird-retry

 var Promise = require('bluebird');
 var retry = require('bluebird-retry');
 var count = 0;
function myfunc() {
    console.log('myfunc called ' + (++count) + ' times '+new Date().toISOString());
    return Promise.reject(new Error(''));
}
retry(myfunc,{ max_tries: 5, interval: 5000, backoff: 2 })
    .then(function(result) {
        console.log(result);
    });

The above program tries the promise flow 5 times with interval * backoff backoff interval between every retry.

Also, should you require to pass any arguments, pass it as args which accepts array of arguments. Include it in options section where max_retries, interval and backoff is mentioned.

Here is the official documentation https://www.npmjs.com/package/bluebird-retry