Introduction to faktory-worker

Faktory-worker is a robust and efficient background job processing library for languages like Ruby, Python, Go, and node.js. Designed to handle a large number of jobs with minimal latencies, it offers an easy-to-use, highly flexible API that integrates smoothly with Faktory, a Go-based background job processor.

Getting Started

Before diving into the APIs, ensure you’ve installed Faktory and the appropriate language client library. For example, in Ruby, you would install the gem:

  gem install faktory_worker_ruby

Connecting to Faktory

To connect your worker to Faktory, initialize a client:

  # Ruby example
  require 'faktory_worker_ruby'

  client = Faktory::Client.new

Defining and Enqueuing Jobs

Define a job class and enqueue jobs:

  class MyJob
    include Faktory::Job

    def perform(name)
      puts "Hello, #{name}"
    end
  end

  MyJob.perform_async('world')

Processing Jobs

The worker processes enqueued jobs:

  worker = Faktory::Worker.new
  worker.run

Job Middleware

Add middleware to your job processing pipeline to customize the behavior:

  Faktory::Middleware::Server.configure do |chain|
    chain.add MyCustomMiddleware
  end

Scheduing Jobs

Schedule jobs to be performed in the future:

  MyJob.perform_in(5.minutes, 'scheduled job')

Batch Processing

Handle jobs in batches for better efficiency:

  batch = Faktory::Batch.new do |b|
    b.callback('success', MySuccessJob)
  end

  batch.jobs do
    10.times { MyJob.perform_async('batch job') }
  end

Error Handling and Retries

Handle errors and implement retries:

  class MyJob
    include Faktory::Job

    def perform
      raise 'error'
    rescue => e
      retry_job wait: 5.minutes if retry_attempt < 3
    end
  end

App Example

Here is a complete example of a small application leveraging Faktory-worker:

  require 'faktory_worker_ruby'

  class EmailJob
    include Faktory::Job

    def perform(email)
      # Simulate email sending
      puts "Sending email to #{email}"
    end
  end

  class ReportJob
    include Faktory::Job

    def perform(report_id)
      # Simulate report generation
      puts "Generating report #{report_id}"
    end
  end

  worker = Faktory::Worker.new

  worker.supervise('EmailJob') do |job|
    job.perform(async: true) { EmailJob.perform_async('user@example.com') }
  end

  worker.supervise('ReportJob') do |job|
    job.perform(async: true) { ReportJob.perform_async(123) }
  end

  worker.run

This setup illustrates how easy it is to create, enqueue, and process background jobs with Faktory-worker, allowing you to build scalable and resilient applications with minimal effort.

By understanding and leveraging the comprehensive API provided by Faktory-worker, developers can ensure efficient background job processing, ultimately enhancing the performance and reliability of their applications.

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