work.suroh.tk/node_modules/rxjs/_esm2015/operators/retryWhen.js

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2019-12-02 12:22:45 +00:00
import { Subject } from '../Subject';
import { tryCatch } from '../util/tryCatch';
import { errorObject } from '../util/errorObject';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
/**
* Returns an Observable that mirrors the source Observable with the exception of an `error`. If the source Observable
* calls `error`, this method will emit the Throwable that caused the error to the Observable returned from `notifier`.
* If that Observable calls `complete` or `error` then this method will call `complete` or `error` on the child
* subscription. Otherwise this method will resubscribe to the source Observable.
*
* <img src="./img/retryWhen.png" width="100%">
*
* @param {function(errors: Observable): Observable} notifier - Receives an Observable of notifications with which a
* user can `complete` or `error`, aborting the retry.
* @return {Observable} The source Observable modified with retry logic.
* @method retryWhen
* @owner Observable
*/
export function retryWhen(notifier) {
return (source) => source.lift(new RetryWhenOperator(notifier, source));
}
class RetryWhenOperator {
constructor(notifier, source) {
this.notifier = notifier;
this.source = source;
}
call(subscriber, source) {
return source.subscribe(new RetryWhenSubscriber(subscriber, this.notifier, this.source));
}
}
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
class RetryWhenSubscriber extends OuterSubscriber {
constructor(destination, notifier, source) {
super(destination);
this.notifier = notifier;
this.source = source;
}
error(err) {
if (!this.isStopped) {
let errors = this.errors;
let retries = this.retries;
let retriesSubscription = this.retriesSubscription;
if (!retries) {
errors = new Subject();
retries = tryCatch(this.notifier)(errors);
if (retries === errorObject) {
return super.error(errorObject.e);
}
retriesSubscription = subscribeToResult(this, retries);
}
else {
this.errors = null;
this.retriesSubscription = null;
}
this._unsubscribeAndRecycle();
this.errors = errors;
this.retries = retries;
this.retriesSubscription = retriesSubscription;
errors.next(err);
}
}
/** @deprecated internal use only */ _unsubscribe() {
const { errors, retriesSubscription } = this;
if (errors) {
errors.unsubscribe();
this.errors = null;
}
if (retriesSubscription) {
retriesSubscription.unsubscribe();
this.retriesSubscription = null;
}
this.retries = null;
}
notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
const { errors, retries, retriesSubscription } = this;
this.errors = null;
this.retries = null;
this.retriesSubscription = null;
this._unsubscribeAndRecycle();
this.errors = errors;
this.retries = retries;
this.retriesSubscription = retriesSubscription;
this.source.subscribe(this);
}
}
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