@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
105 lines • 3.72 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
/**
* Returns an Observable that mirrors the source Observable with the exception of an `error`. If the source Observable
* calls `error`, this method will resubscribe to the source Observable for a maximum of `count` resubscriptions (given
* as a number parameter) rather than propagating the `error` call.
*
* 
*
* Any and all items emitted by the source Observable will be emitted by the resulting Observable, even those emitted
* during failed subscriptions. For example, if an Observable fails at first but emits [1, 2] then succeeds the second
* time and emits: [1, 2, 3, 4, 5] then the complete stream of emissions and notifications
* would be: [1, 2, 1, 2, 3, 4, 5, `complete`].
*
* ## Example
* ```ts
* import { interval, of, throwError } from 'rxjs';
* import { mergeMap, retry } from 'rxjs/operators';
*
* const source = interval(1000);
* const example = source.pipe(
* mergeMap(val => {
* if(val > 5){
* return throwError('Error!');
* }
* return of(val);
* }),
* //retry 2 times on error
* retry(2)
* );
*
* const subscribe = example.subscribe({
* next: val => console.log(val),
* error: val => console.log(`${val}: Retried 2 times then quit!`)
* });
*
* // Output:
* // 0..1..2..3..4..5..
* // 0..1..2..3..4..5..
* // 0..1..2..3..4..5..
* // "Error!: Retried 2 times then quit!"
* ```
*
* @param {number} count - Number of retry attempts before failing.
* @return {Observable} The source Observable modified with the retry logic.
* @method retry
* @owner Observable
*/
function retry(count) {
if (count === void 0) { count = -1; }
return function (source) { return source.lift(new RetryOperator(count, source)); };
}
exports.retry = retry;
var RetryOperator = /** @class */ (function () {
function RetryOperator(count, source) {
this.count = count;
this.source = source;
}
RetryOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new RetrySubscriber(subscriber, this.count, this.source));
};
return RetryOperator;
}());
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var RetrySubscriber = /** @class */ (function (_super) {
__extends(RetrySubscriber, _super);
function RetrySubscriber(destination, count, source) {
var _this = _super.call(this, destination) || this;
_this.count = count;
_this.source = source;
return _this;
}
RetrySubscriber.prototype.error = function (err) {
if (!this.isStopped) {
var _a = this, source = _a.source, count = _a.count;
if (count === 0) {
return _super.prototype.error.call(this, err);
}
else if (count > -1) {
this.count = count - 1;
}
source.subscribe(this._unsubscribeAndRecycle());
}
};
return RetrySubscriber;
}(Subscriber_1.Subscriber));
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