backoff-rxjs/dist/esm2015/operators/retryBackoff.js

A collection of helpful RxJS operators to deal with backoff strategies (like exponential backoff)

import { defer, iif, throwError, timer, concatMap, retryWhen, tap } from 'rxjs';
import { exponentialBackoffDelay, getDelay } from '../utils';
export function retryBackoff(config) {
    const { initialInterval, maxRetries = Infinity, maxInterval = Infinity, shouldRetry = () => true, resetOnSuccess = false, backoffDelay = exponentialBackoffDelay, } = typeof config === 'number' ? { initialInterval: config } : config;
    return (source) => defer(() => {
        let index = 0;
        return source.pipe(retryWhen(errors => errors.pipe(concatMap(error => {
            const attempt = index++;
            return iif(() => attempt < maxRetries && shouldRetry(error), timer(getDelay(backoffDelay(attempt, initialInterval), maxInterval)), throwError(error));
        }))), tap(() => {
            if (resetOnSuccess) {
                index = 0;
            }
        }));
    });
}