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Viewing file:     poller.js (1.4 KB)      -rw-r--r--

import { sleep } from "./utils/sleep";
import { WaiterState } from "./waiter";
const exponentialBackoffWithJitter = (minDelay, maxDelay, attemptCeiling, attempt) => {
    if (attempt > attemptCeiling)
        return maxDelay;
    const delay = minDelay * 2 ** (attempt - 1);
    return randomInRange(minDelay, delay);
};
const randomInRange = (min, max) => min + Math.random() * (max - min);
export const runPolling = async ({ minDelay, maxDelay, maxWaitTime, abortController, client, abortSignal }, input, acceptorChecks) => {
    const { state, reason } = await acceptorChecks(client, input);
    if (state !== WaiterState.RETRY) {
        return { state, reason };
    }
    let currentAttempt = 1;
    const waitUntil = Date.now() + maxWaitTime * 1000;
    const attemptCeiling = Math.log(maxDelay / minDelay) / Math.log(2) + 1;
    while (true) {
        if (abortController?.signal?.aborted || abortSignal?.aborted) {
            return { state: WaiterState.ABORTED };
        }
        const delay = exponentialBackoffWithJitter(minDelay, maxDelay, attemptCeiling, currentAttempt);
        if (Date.now() + delay * 1000 > waitUntil) {
            return { state: WaiterState.TIMEOUT };
        }
        await sleep(delay);
        const { state, reason } = await acceptorChecks(client, input);
        if (state !== WaiterState.RETRY) {
            return { state, reason };
        }
        currentAttempt += 1;
    }
};