65 lines
2.4 KiB
JavaScript
65 lines
2.4 KiB
JavaScript
#!/usr/bin/env node
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/*
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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*/
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'use strict';
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var events = require('cordova-common').events;
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/*
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* Retry a promise-returning function a number of times, propagating its
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* results on success or throwing its error on a failed final attempt.
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*
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* @arg {Number} attemptsLeft - The number of times to retry the passed call.
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* @arg {Function} promiseFunction - A function that returns a promise.
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* @arg {...} - Arguments to pass to promiseFunction.
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*
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* @returns {Promise}
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*/
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module.exports.retryPromise = function (attemptsLeft, promiseFunction) {
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// NOTE:
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// get all trailing arguments, by skipping the first two (attemptsLeft and
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// promiseFunction) because they shouldn't get passed to promiseFunction
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var promiseFunctionArguments = Array.prototype.slice.call(arguments, 2);
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return promiseFunction.apply(undefined, promiseFunctionArguments).then(
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// on success pass results through
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function onFulfilled (value) {
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return value;
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},
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// on rejection either retry, or throw the error
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function onRejected (error) {
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attemptsLeft -= 1;
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if (attemptsLeft < 1) {
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throw error;
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}
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events.emit('verbose', 'A retried call failed. Retrying ' + attemptsLeft + ' more time(s).');
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// retry call self again with the same arguments, except attemptsLeft is now lower
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var fullArguments = [attemptsLeft, promiseFunction].concat(promiseFunctionArguments);
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return module.exports.retryPromise.apply(undefined, fullArguments);
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}
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);
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};
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