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setup-python/node_modules/rsvp/lib/rsvp/all-settled.js
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

81 lines
2.3 KiB
JavaScript

import {
default as Enumerator,
setSettledResult
} from './enumerator';
import Promise from './promise';
/**
@module rsvp
@public
**/
class AllSettled extends Enumerator {
constructor(Constructor, entries, label) {
super(Constructor, entries, false /* don't abort on reject */, label);
}
}
AllSettled.prototype._setResultAt = setSettledResult;
/**
`RSVP.allSettled` is similar to `RSVP.all`, but instead of implementing
a fail-fast method, it waits until all the promises have returned and
shows you all the results. This is useful if you want to handle multiple
promises' failure states together as a set.
Returns a promise that is fulfilled when all the given promises have been
settled. The return promise is fulfilled with an array of the states of
the promises passed into the `promises` array argument.
Each state object will either indicate fulfillment or rejection, and
provide the corresponding value or reason. The states will take one of
the following formats:
```javascript
{ state: 'fulfilled', value: value }
or
{ state: 'rejected', reason: reason }
```
Example:
```javascript
let promise1 = RSVP.Promise.resolve(1);
let promise2 = RSVP.Promise.reject(new Error('2'));
let promise3 = RSVP.Promise.reject(new Error('3'));
let promises = [ promise1, promise2, promise3 ];
RSVP.allSettled(promises).then(function(array){
// array == [
// { state: 'fulfilled', value: 1 },
// { state: 'rejected', reason: Error },
// { state: 'rejected', reason: Error }
// ]
// Note that for the second item, reason.message will be '2', and for the
// third item, reason.message will be '3'.
}, function(error) {
// Not run. (This block would only be called if allSettled had failed,
// for instance if passed an incorrect argument type.)
});
```
@method allSettled
@public
@static
@for rsvp
@param {Array} entries
@param {String} [label] - optional string that describes the promise.
Useful for tooling.
@return {Promise} promise that is fulfilled with an array of the settled
states of the constituent promises.
*/
export default function allSettled(entries, label) {
if (!Array.isArray(entries)) {
return Promise.reject(new TypeError("Promise.allSettled must be called with an array"), label);
}
return new AllSettled(Promise, entries, label).promise;
}