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