PidginMQ

PidginMQ is a job queuing and task scheduling library for Node.js and JavaScript, built on PostgreSQL.

The library is heavily inspired by River

Documentation

Installation

YARN:

yarn add pidginmq

NPM:

npm install pidginmq -S

Requirements

• Node 18 or higher
• PostgreSQL 11 or higher

Features

• Cron scheduling
• Recurring Jobs
• Deferred jobs
• Automatic retries (with exponential backoff)
• Configurable job timeouts
• Direct table access for bulk loads

Database initialization

PidginMQ requires specific database tables to function properly. To facilitate this, PidginMQ includes a command-line tool that executes the necessary migrations.

When you install the library, the CLI tool is installed automatically

CLI tool containse 3 commands:

• up - running next migration
• down - will undo last migration
• current - return current migration version

For all 3 commands we need to supply database connection url.

pidginmq up

pidginmq up postgresql://other@localhost/otherdb

Result:

PidginMQ database schema is migrated to version: 001

pidginmq down

pidginmq down postgresql://other@localhost/otherdb

Result:

PidginMQ database schema is downgraded to version: none

pidginmq current

pidginmq down postgresql://other@localhost/otherdb

Result:

Current database migration version: 001

Examples

Initialize the schema for PidginMQ in the database by running the CLI tool.

Create a client:

    const options = {
      workers: new Workers(),
      queues: new Map<string, QueueConfig>(),
      dbUri: 'postgresql://pidginmq:Password1@localhost:5432/pidginmq',
    };
    this.client = new Client(options);
    this.client.start();

Stop the client:

this.client.stop();

Add a worker:

this.client.addWorker('test', (job) => {
  console.info(`Processing job:`, JSON.stringify(job));
});

Add a job:

await this.client.addJob({
  kind: 'test',
  queue: 'test-queue',
});

Contributing

To setup a development environment for this library:

git clone https://github.com/ivanvs/pidginmq.git
npm install

To run the test suite and code coverage:

npm run test:cov

License

PidginMQ is released under MIT License.