Rails Cloud Tasks

APIs

The following APIs must be enabled in your project(s):

• Cloud Tasks API
• Admin SDK API

Setup

As an application (when contributing)

• Install packages:

  bundle install

As a package (when inside another application)

• Add the gem to application's Gemfile:

gem 'rails-cloud-tasks'

• Add an initializer:

# ./config/initializers/rails_cloud_tasks.rb

require 'rails-cloud-tasks'

RailsCloudTasks.configure do |config|
  config.service_account_email = 'test-account@test-project.iam.gserviceaccount.com'
  config.project_id = 'my-gcp-project' # This is not needed if running on GCE
  config.location_id = 'us-central1'
  config.scheduler_file_path = './custom_path/scheduler_jobs.yml'
  config.scheduler_prefix_name = 'my-app-name'

  # Base url used by Cloud Tasks to reach your application and run the tasks
  config.host = 'https://myapplication.host.com'
  config.tasks_path = '/v2/tasks' # default: '/tasks'

  # Inject routes into application
  config.inject_routes
end

Check out the available configs and its usage description:

attribute	description	env support	app engine fallback	default value
service_account_email	The app service account email. It''s used to impersonate an user on schedule job	GCP_SERVICE_ACCOUNT	✓
project_id	The Project ID	GCP_PROJECT	✓
location_id	The region where you app is running (eg: us-central1, us-east1...)	GCP_LOCATION	✓
host	The app endpoint which the app is running. Do not use custom domain Use the generated domain by Cloud Run	GCP_APP_ENDPOINT
scheduler_file_path	Path which the scheduler file is located	𐄂		'./config/scheduler.yml'
scheduler_prefix_name	The prefix to be set into scheduler job name	𐄂		'rails-cloud'
tasks_path	The path to run tasks	𐄂		'/tasks'

• Configure ActiveJob queue_adapter

# ./config/application.rb

config.active_job.queue_adapter = RailsCloudTasks.queue_adapter

• Add a Job class:

# ./app/jobs/application_job.rb

class ApplicationJob < ActiveJob::Base
  queue_as 'my-default-queue'
end


# ./app/jobs/my_first_job.rb

class MyFirstJob < ApplicationJob
  # Here you may override the queue, if needed
  queue_as 'some-other-queue'

  def perform(attrs)
    # Execute stuff
  end
end

• Enqueue a job:

MyJob.perform_later(attrs)

Scheduled Jobs

We have support to Google Cloud Schedule. It's based on Cloud tasks, the jobs are scheduled with HTTP Target. We do not support Pub/Sub or App Engine HTTP for now.

Check out the follow sample of config file:

# config/scheduler.yml
- name: UsersSyncJob
  schedule: 0 8 * * *
  description: Sync user data
  time_zone: "America/Los_Angeles"
  class_name: Users::SyncJob
  args:
    - this_first: argument
      is_a: hash
    - - this second argument
      - is an array
    - this third argument is a string

attribute	description	required
name	Any descriptive name, following Tasks naming restrictions	✓
schedule	The frequency to run your job. It should be a unix-cron format	✓
description	What this job does	✓
time_zone	Choose which one timezone your job must run	✓
args	Arguments to the job execution. Important: if present, this must be an array of items. Check out the example above	𐄂
class_name	The Job class name (including namespace)	✓

Tests

To run tests:

bundle exec rspec

Version

Use Semantic versioning.