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qjobs

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qjobs

qjobs is a simple and stupid queue job manager for nodejs

  • 1.2.0
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  • npm
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What is qjobs?

The qjobs npm package is a lightweight, fast job queue manager for Node.js. It allows for efficient management of tasks with the ability to limit the number of concurrent jobs, making it suitable for scenarios where resource management and job scheduling are critical. It's particularly useful for managing CPU-intensive tasks or IO-bound operations in a controlled manner.

What are qjobs's main functionalities?

Job scheduling and concurrency control

This feature allows you to schedule jobs and control the number of jobs running concurrently. In the code sample, a new QJobs instance is created with a maximum concurrency of 5, meaning no more than 5 jobs will run at the same time. Jobs are added to the queue and executed with controlled concurrency.

const QJobs = require('qjobs');

const myQueue = new QJobs({maxConcurrency: 5});

const myJob = function(args, next) {
    console.log('Working on job with args', args);
    next();
};

for (let i = 0; i < 10; i++) {
    myQueue.add(myJob, [i]);
}

myQueue.run();

Job completion and error handling

This feature demonstrates how to handle job completion and errors. Jobs are defined with a condition to either complete successfully or fail. The QJobs instance listens for 'end' and 'error' events to handle job completion and errors respectively. This allows for robust error handling and notification upon job queue completion.

const QJobs = require('qjobs');

const myQueue = new QJobs();

const myJob = function(args, next) {
    if (args.shouldFail) {
        throw new Error('Job failed');
    } else {
        console.log('Job completed successfully');
        next();
    }
};

myQueue.on('end', function() {
    console.log('All jobs have been processed');
});

myQueue.on('error', function(err) {
    console.error('Error processing job:', err);
});

myQueue.add(myJob, [{shouldFail: false}]);
myQueue.add(myJob, [{shouldFail: true}]);

myQueue.run();

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Package last updated on 19 Feb 2018

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