prisma-queue

Features

Simple, reliable and efficient concurrent work queue for Prisma + PostgreSQL

• Leverages PostgreSQL SKIP LOCKED feature to reliably dequeue jobs

• Supports crontab syntax for complex scheduled jobs

• Written in TypeScript for static type checking with exported types along the library.

Install

npm install @mgcrea/prisma-queue --save

Quickstart

1. First add "interactiveTransactions" to your schema.prisma client configuration:

generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["interactiveTransactions"]
}

1. Append the QueueJob model to your schema.prisma file

2. Create your queue

type JobPayload = {email: string};
type JobResult = {status: number};

export const emailQueue = createQueue<JobPayload, JobResult>({name: 'email'}, async (job, client) => {
  const {id, payload} = job;
  console.log(`Processing job#${id} with payload=${JSON.stringify(payload)})`);
  // await someAsyncMethod();
  await job.progress(50);
  const status = 200;
  if (Math.random() > 0.5) {
    throw new Error(`Failed for some unknown reason`);
  }
  console.log(`Finished job#${id} with status=${status}`);
  return {status};
});

1. Queue a job

import {emailQueue} from './emailQueue';

const main = async () => {
  const job = await emailQueue.enqueue({email: 'foo@bar.com'});
};

main();

1. Schedule a recurring job

import {emailQueue} from './emailQueue';

const main = async () => {
  const nextJob = await queue.schedule({key: 'email-schedule', cron: '5 5 * * *'}, {email: 'foo@bar.com'});
};

main();

Authors

• Olivier Louvignes <olivier@mgcrea.io>

Credits

Heavily inspired from

• pg-queue by Alex Rudenko

License

The MIT License

Copyright (c) 2022 Olivier Louvignes <olivier@mgcrea.io>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit
persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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