ActiveJob::GoogleCloudTasks::HTTP

ActiveJob::GoogleCloudTasks::HTTP is an ActiveJob adapter for running jobs via Google Cloud Tasks. As the name suggests it only supports HTTP targets.

Installation

Add this line to your application's Gemfile:

gem 'activejob-google_cloud_tasks-http'

And then execute:

$ bundle

Or install it yourself as:

$ gem install activejob-google_cloud_tasks-http

Usage

Setup

Configure an adapter instance and pass it to Active Job:

Rails.application.config.active_job.queue_adapter = ActiveJob::GoogleCloudTasks::HTTP::Adapter.new(
  project: 'a-gcp-project-name',
  location: 'asia-northeast1',
  url: 'https://an-endpoint-to-perform-jobs.a.run.app/_jobs',
  client: Google::Cloud::Tasks.cloud_tasks(version: :v2beta3), # optional
  task_options: { # optional
    oidc_token: {
      service_account_email: 'cloudrun-invoker@a-gcp-project-name.iam.gserviceaccount.com'
    }
  }
)

A name passed to queue_as will be used to identify which Cloud Tasks queue will be used by the job:

class GoodJob < ApplicationJob
  queue_as :a_queue_name

  # ...
end

Mount the Rack application to set up an endpoint for performing jobs:

# in config/routes.rb
mount ActiveJob::GoogleCloudTasks::HTTP::Rack.new, at: '/_jobs'

Note that this rack app itself does not have any authentication mechanism.

Testing

Requiring active_job/google_cloud_tasks/http/inline makes the adapter skip enqueueing jobs to Google Cloud Tasks. Once a job is enqueued, it will perform the job immediately.

require 'active_job/google_cloud_tasks/http/inline' unless Rails.env.production?

Error when calling assets:precompile?

When you call assets:precompile, all configs and initializers are loaded. If you load your credentials via environment variables they may not be available and the adapter initialization will cause errors. To solve this, wrap the queue_adapter config in a unless ARGV.include?("assets:precompile") condition. e.g.:

unless ARGV.include?("assets:precompile") # prevents running on assets:precompile
  Rails.application.config.active_job.queue_adapter = ActiveJob::GoogleCloudTasks::HTTP::Adapter.new(
    project: 'my-project',
    location: 'europe-west2',
    url: 'https://www.example.com/jobs',
    client: Google::Cloud::Tasks.cloud_tasks(
      version: :v2beta3,
      credentials: JSON.parse(ENV["GOOGLE_CLOUD_PRODUCTION_KEYFILE"]) # this will cause an error if the environment variable does not exist
    )
  )
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/esminc/activejob-google_cloud_tasks-http.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the ActiveJob::GoogleCloudTasks::HTTP project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.