66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.pollAgainstDeadline = pollAgainstDeadline;
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exports.raceAgainstDeadline = raceAgainstDeadline;
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var _ = require("./");
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/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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async function raceAgainstDeadline(cb, deadline) {
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let timer;
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return Promise.race([cb().then(result => {
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return {
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result,
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timedOut: false
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};
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}), new Promise(resolve => {
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const kMaxDeadline = 2147483647; // 2^31-1
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const timeout = (deadline || kMaxDeadline) - (0, _.monotonicTime)();
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timer = setTimeout(() => resolve({
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timedOut: true
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}), timeout);
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})]).finally(() => {
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clearTimeout(timer);
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});
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}
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async function pollAgainstDeadline(callback, deadline, pollIntervals = [100, 250, 500, 1000]) {
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var _pollIntervals$pop;
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const lastPollInterval = (_pollIntervals$pop = pollIntervals.pop()) !== null && _pollIntervals$pop !== void 0 ? _pollIntervals$pop : 1000;
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let lastResult;
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const wrappedCallback = () => Promise.resolve().then(callback);
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while (true) {
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var _shift;
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const time = (0, _.monotonicTime)();
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if (deadline && time >= deadline) break;
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const received = await raceAgainstDeadline(wrappedCallback, deadline);
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if (received.timedOut) break;
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lastResult = received.result.result;
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if (!received.result.continuePolling) return {
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result: lastResult,
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timedOut: false
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};
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const interval = (_shift = pollIntervals.shift()) !== null && _shift !== void 0 ? _shift : lastPollInterval;
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if (deadline && deadline <= (0, _.monotonicTime)() + interval) break;
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await new Promise(x => setTimeout(x, interval));
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}
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return {
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timedOut: true,
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result: lastResult
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};
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} |