27 lines
590 B
TypeScript
27 lines
590 B
TypeScript
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import { ajax } from 'rxjs/observable/dom/ajax';
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import { range } from 'rxjs/observable/range';
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import { timer } from 'rxjs/observable/timer';
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import { pipe } from 'rxjs/util/pipe';
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import { retryWhen, zip, map, mergeMap } from 'rxjs/operators';
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function backoff(maxTries, ms) {
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return pipe(
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retryWhen(attempts => range(1, maxTries)
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.pipe(
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zip(attempts, (i) => i),
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map(i => i * i),
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mergeMap(i => timer(i * ms))
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)
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)
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);
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}
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ajax('/api/endpoint')
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.pipe(backoff(3, 250))
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.subscribe(data => handleData(data));
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function handleData(data) {
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// ...
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}
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