mana-common/lib/promise-util.js

Common utils for mana

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.retry = retry;
exports.timeout = timeout;

var _cancellation = require("./cancellation");

var _deferred = require("./deferred");

/* eslint-disable @typescript-eslint/no-explicit-any */

/**
 * @returns resolves after a specified number of milliseconds
 * @throws cancelled if a given token is cancelled before a specified number of milliseconds
 */
function timeout(ms, token = _cancellation.CancellationToken.None) {
  const deferred = new _deferred.Deferred();
  const handle = setTimeout(() => deferred.resolve(), ms);
  token.onCancellationRequested(() => {
    clearTimeout(handle);
    deferred.reject((0, _cancellation.cancelled)());
  });
  return deferred.promise;
}

async function retry(task, delay, retries) {
  let lastError;

  for (let i = 0; i < retries; i += 1) {
    try {
      // eslint-disable-next-line no-await-in-loop
      return await task();
    } catch (error) {
      lastError = error; // eslint-disable-next-line no-await-in-loop

      await timeout(delay);
    }
  } // eslint-disable-next-line @typescript-eslint/no-throw-literal


  throw lastError;
}