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pgq's Introduction

pgq

Postgres Job Queues


This library is a simple way to use Postgres for a job queue system in Golang projects. It takes advantage of the well-known approach of using locks, as described in this Crunchy Data article.

pgq supports multiple queues through the use of job types, meaning that each job is given the type that you specify, and each time you retrieve a job from the queue, you specify the types of jobs that you want to retrieve.

Installation

To get started with pgq, add the module to your Go project.

go get github.com/james-elicx/pgq@v1

Usage

import (
  "context"
  
  "github.com/james-elicx/pgq"
)

func main() {
	db := ... // Open a connection to the database
	ctx := context.Background()

	// Create a new queue instance
	q := pgq.NewQueue(db)

	// Setup the database schema
	if err := q.SetupDatabase(ctx); err != nil {
		panic(err)
	}

	// Register a handler for a job type
	if err = q.RegisterHandler("test_type", func(job pgq.Job) error {
		// ... process the job ...
		return nil
	}); err != nil {
		panic(err)
	}

	// Add a job to the queue
	if err = q.Put(ctx, "test_type", "test_data"); err != nil {
		panic(err)
	}

	// Retrieve and process a job from the queue
	if err = q.Pop(ctx, []string{"test_type"}); err != nil {
		panic(err)
	}
}

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