91 lines
3.3 KiB
JavaScript
91 lines
3.3 KiB
JavaScript
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import { Subject } from '../Subject';
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import { tryCatch } from '../util/tryCatch';
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import { errorObject } from '../util/errorObject';
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import { OuterSubscriber } from '../OuterSubscriber';
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import { subscribeToResult } from '../util/subscribeToResult';
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/**
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* Returns an Observable that mirrors the source Observable with the exception of an `error`. If the source Observable
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* calls `error`, this method will emit the Throwable that caused the error to the Observable returned from `notifier`.
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* If that Observable calls `complete` or `error` then this method will call `complete` or `error` on the child
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* subscription. Otherwise this method will resubscribe to the source Observable.
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*
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* <img src="./img/retryWhen.png" width="100%">
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*
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* @param {function(errors: Observable): Observable} notifier - Receives an Observable of notifications with which a
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* user can `complete` or `error`, aborting the retry.
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* @return {Observable} The source Observable modified with retry logic.
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* @method retryWhen
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* @owner Observable
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*/
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export function retryWhen(notifier) {
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return (source) => source.lift(new RetryWhenOperator(notifier, source));
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}
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class RetryWhenOperator {
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constructor(notifier, source) {
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this.notifier = notifier;
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this.source = source;
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}
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call(subscriber, source) {
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return source.subscribe(new RetryWhenSubscriber(subscriber, this.notifier, this.source));
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}
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}
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @ignore
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* @extends {Ignored}
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*/
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class RetryWhenSubscriber extends OuterSubscriber {
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constructor(destination, notifier, source) {
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super(destination);
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this.notifier = notifier;
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this.source = source;
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}
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error(err) {
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if (!this.isStopped) {
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let errors = this.errors;
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let retries = this.retries;
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let retriesSubscription = this.retriesSubscription;
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if (!retries) {
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errors = new Subject();
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retries = tryCatch(this.notifier)(errors);
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if (retries === errorObject) {
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return super.error(errorObject.e);
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}
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retriesSubscription = subscribeToResult(this, retries);
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}
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else {
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this.errors = null;
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this.retriesSubscription = null;
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}
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this._unsubscribeAndRecycle();
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this.errors = errors;
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this.retries = retries;
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this.retriesSubscription = retriesSubscription;
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errors.next(err);
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}
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}
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/** @deprecated internal use only */ _unsubscribe() {
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const { errors, retriesSubscription } = this;
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if (errors) {
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errors.unsubscribe();
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this.errors = null;
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}
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if (retriesSubscription) {
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retriesSubscription.unsubscribe();
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this.retriesSubscription = null;
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}
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this.retries = null;
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}
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notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
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const { errors, retries, retriesSubscription } = this;
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this.errors = null;
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this.retries = null;
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this.retriesSubscription = null;
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this._unsubscribeAndRecycle();
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this.errors = errors;
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this.retries = retries;
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this.retriesSubscription = retriesSubscription;
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this.source.subscribe(this);
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}
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}
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//# sourceMappingURL=retryWhen.js.map
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