@cloud-copilot/iam-lens/dist/esm/workers/StreamingWorkQueue.js

Visibility in IAM in and across AWS accounts

import { RingQueue } from './RingQueue.js';
export class StreamingWorkQueue {
    constructor(options = {}) {
        this.ringCapacity = 1024;
        this.enqueueIndex = 0;
        this.dequeueIndex = 0;
        this.notifyScheduled = false;
        if (options.ringCapacity) {
            this.ringCapacity = options.ringCapacity;
        }
        this.rings = [new RingQueue(this.ringCapacity)];
    }
    setWorkAvailableCallback(callback) {
        this.onWorkAvailable = callback;
    }
    enqueue(item) {
        let attempts = 0;
        while (attempts < this.rings.length) {
            const ring = this.rings[this.enqueueIndex];
            if (ring.enqueue(item)) {
                this.scheduleNotify();
                return;
            }
            this.enqueueIndex = (this.enqueueIndex + 1) % this.rings.length;
            attempts++;
        }
        // All rings full, create a new one
        const newRing = new RingQueue(this.ringCapacity);
        newRing.enqueue(item);
        this.rings.push(newRing);
        this.enqueueIndex = this.rings.length - 1;
        this.scheduleNotify();
    }
    dequeue() {
        let attempts = 0;
        while (attempts < this.rings.length) {
            const ring = this.rings[this.dequeueIndex];
            const item = ring.dequeue();
            if (item !== undefined)
                return item;
            this.dequeueIndex = (this.dequeueIndex + 1) % this.rings.length;
            attempts++;
        }
        return undefined;
    }
    length() {
        return this.rings.reduce((sum, ring) => sum + ring.length(), 0);
    }
    scheduleNotify() {
        if (this.notifyScheduled || !this.onWorkAvailable) {
            return;
        }
        this.notifyScheduled = true;
        // Use a microtask to debounce notifications
        queueMicrotask(() => {
            this.notifyScheduled = false;
            this.onWorkAvailable?.();
        });
    }
}
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