35 lines
911 B
Plaintext
35 lines
911 B
Plaintext
import { IDelay } from "./delay.interface";
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import { IBackOffOptions } from "../options";
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import { JitterFactory } from "../jitter/jitter.factory";
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export abstract class Delay implements IDelay {
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protected attempt = 0;
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constructor(private options: IBackOffOptions) {}
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public apply() {
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return new Promise(resolve => setTimeout(resolve, this.jitteredDelay));
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}
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public setAttemptNumber(attempt: number) {
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this.attempt = attempt;
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}
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private get jitteredDelay() {
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const jitter = JitterFactory(this.options);
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return jitter(this.delay);
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}
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private get delay() {
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const constant = this.options.startingDelay;
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const base = this.options.timeMultiple;
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const power = this.numOfDelayedAttempts;
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const delay = constant * Math.pow(base, power);
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return Math.min(delay, this.options.maxDelay);
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}
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protected get numOfDelayedAttempts() {
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return this.attempt;
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}
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}
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