Output MySQL query results in CSV format?

Can async-mutex npm Package be used Safely with multiple Workers

Robinson

I cannot seem to get a straight answer on this. I am using the NPM package 'worker-farm'

import workerFarm from 'worker-farm';

to provide me with concurrency - it is working very well. In one part of waht I am doing, I need to upload a file to some blob storage of cloud service provider. I only want to do this once. So I do the following using 'async-mutex'

// This is being run on six separate workers. 
const mutex = new Mutex();
let panoResolutionSet = new Set<Resolution>();

// ...

mutex
    .runExclusive(async () => {
        if (!panoResolutionSet.has(resolution)) {

            const panoFilePath = `${resolutionPath}/pano_${faceGenerator.imageInfo.width}.jpg`;
            logger?.info(`Attempting to write the FULL pano "${faceGenerator.imageInfo.width}" for ${Resolution[resolution]}`);

            const succeeded = await azureStorageService.upload(
                new AzureBlobDetails(panoFilePath, this.toArrayBuffer(faceGenerator.imageData)), 
                false
            );

            if (succeeded) {
                panoResolutionSet.add(resolution);
                logger?.info(`Panorama for ${Resolution[resolution]} upload to "${panoFilePath}" successfully`);
            }
        }
    });

but when debugging in VSCode, this code block is entered at the same time (perhaps the debugger is affecting the state?). The question is simply:

Q. Can I use this async-mutex to provide thread safety when using multiple workers?