Are you using Rails 4.2+ and ActiveJob with the Shoryuken driver to use SQS? Do you have recurring jobs that you kick off periodically with the amazing Clockwork gem? Tired of paying for a Heroku dyno just to run the clockwork instance? Then CloudwatchScheduler is just the gem for you!
CloudwatchScheduler uses AWS Cloudwatch scheduled event rules to push a message on the cloudwatch_scheduler queue according to the schedule you provide, using a simple DSL similar to the Clockwork DSL you're already familiar with. The rules are free, and the messages cost a few billionths of a cent each, saving you over $25/mo in Heroku dyno costs! Wow!!
And thats not all! It will automatically provision the Cloudwatch Events and Queues via a simple rake task! Amazing!
Add this line to your application's Gemfile:
gem 'cloudwatch_scheduler'
And then execute:
$ bundle
Or install it yourself as:
$ gem install cloudwatch_scheduler
Make yourself a config/cloudwatch_scheduler.rb
file:
require "cloudwatch_scheduler"
CloudwatchScheduler do |config|
# 4am every day
task "spawn_analytics_jobs", cron: "0 4 * * ? *" do
return if Rails.application.config.deploy_env.sandbox?
AnalyticsSpawnerJob.perform_later
end
task "capture_pg_stats", every: 5.minutes do
PgHero.capture_query_stats
end
end
Then do rake cloudwatch_scheduler:setup
, and CloudwatchScheduler will provision the events and
cloudwatch_scheduler queue. Then, start your Shoruken workers as normal, and the
CloudwatchScheduler::Job
will get those events, and perform the tasks defined.
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.
Bug reports and pull requests are welcome on GitHub at https://github.com/paul/cloudwatch_scheduler.