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

Visibility in IAM in and across AWS accounts

import { Worker } from 'worker_threads';
import { convertArrayBufferToObject, convertObjectToArrayBuffer } from './buffers.js';
//TODO: Add a Prefix to avoid collisions if there are multiple caches
export class SharedArrayBufferMainCache {
    constructor(workers) {
        this.cache = {};
        for (const worker of workers) {
            worker.on('message', (message) => {
                if (message.type === 'getCache') {
                    const cacheKey = message.cacheKey;
                    const value = this.cache[cacheKey];
                    if (value) {
                        worker.postMessage({ type: 'cacheHit', cacheKey, value });
                    }
                    else {
                        worker.postMessage({ type: 'cacheMiss', cacheKey });
                    }
                }
                else if (message.type === 'saveCache') {
                    this.cache[message.cacheKey] = message.value;
                }
            });
        }
    }
    async withCache(cacheKey, fetcher) {
        if (this.cache[cacheKey]) {
            return convertArrayBufferToObject(this.cache[cacheKey]);
        }
        const result = await fetcher();
        this.cache[cacheKey] = convertObjectToArrayBuffer(result);
        return result;
    }
}
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