resque-duplicateless

ResqueUniqueJob

Resque is awesome. It's great at queuing up lots of jobs and processing them offline. It works making use of Redis, which is extraordinarily fast.

However, Resque makes use of Redis's lists, which means that the entries are not unique. And this is usually what we want. But sometimes it's not.

ResqueUniqueJob gives us the option of uniquely adding a job to a queue. This will ensure that the job will only be added to the queue if no other job matching its class and arguments already exists on the queue.

Installation

Add this line to your application's Gemfile:

gem 'resque_unique_job'

And then execute:

$ bundle

Or install it yourself as:

$ gem install resque_unique_job

Usage

Making a job unique is super easy.

In a normal Resque environment, we would enqueue a job by using the following method

Resque.enqueue FooClass, argument_1, argument_2, ...

In order to uniquely enqueue that class, we do the following.

Resque.enqueue_uniquely FooClass, argument_1, argument_2, ...

Also, a correlated method to enqueue_to exists in enqueue_uniquely_to

Development

After checking out the repo, run bin/setup to install dependencies. 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.

Please make sure to run bundle exec rspec if you make any changes to make sure they are not breaking. Rspec expects that there is a Redis process set up on the machine and makes use of the keys ruj:rspec:queue_1 and ruj:rspec:queue_1

WARNING - The Rspec will delete everything on the ruj:rspec:queue_1 and ruj:rspec:queue_2 queues. Please make sure you don't need them for anything before testing or change the redis database in the spec/helpers/spec_init.rb file.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/resque_unique_job. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

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

Code of Conduct

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

Authors

This gem was authored by the following:

Jeremy Linder (deathbyjer)