Resque::Disable::Job

This is a Resque plugin that allows us to disable jobs from being processed, by using the job class name and arguments. It uses some Redis data structures to keep a record of what jobs need to be disabled and how many jobs were disabled for that rule.

Installation

Add this line to your application's Gemfile:

gem 'resque-disable-job'

And then execute:

$ bundle

Or install it yourself as:

$ gem install resque-disable-job

Usage

Job

You can add it to your job like any other Resque plugin:

  class TestJob
    extend Resque::Plugins::DisableJob
    @queue = :test

    def self.perform(some_id, other_id)
    end
  end

The plugin will add the before_perform_allow_disable_job Resque hook. This will check if the current job needs to be stopped and it calls the disable_job_handler method. By default this will just raise Resque::Job::DontPerform. If you want to do more you can override it in your job or base class.

Disabling a Job

In your application's console you can use the Resque::Plugins::DisableJob::Job.disable_job method to disable a job.

Resque::Plugins::DisableJob::Job.disable_job(job_name, matching_arguments, ttl = 3600)

Note: By default, each rule has a ttl of 1 hour. This is because disabling a job should be a temporary action.

# Disable all the jobs of that class:
TestJob.disable
# Disable all TestJob jobs with the first argument `65` 
TestJob.disable([65])
# Disable all SampleJob jobs that have the argument a == 5
SampleJob.disable({a: 5})

# Disable a job for one hour
SampleJob.disable({a: 1}, 3600)

# Re-enable jobs:
TestJob.enable()
TestJob.enable([65])

# Simple kill-switch to remove all the rules for the job
TestJob.enable_all

# Kill-switch to remove all the jobs and their rules
Resque::Plugins::DisableJob::Job.enable_all!

Note: You can disable many arguments for one job type, but for performance reasons we look at only 10 rules.

Operations

Resque::Plugins::DisableJob::Stats comes with a a few methods that will help you keep track of actively disabled jobs and how many times the rule was matched. They all return an Array[Resque::Plugins::DisableJob::Rule].

• all_disabled_jobs - a list of all the disabled jobs and their rules
• job_disabled_rules(job_name) - a list of all the rules for one particular job
• disabled_stats - all the disabled jobs, their rules, and the counter of how many times it was matched (the Rule objects have the counter attribute set)

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/zendesk/resque-disable-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.

Code of Conduct

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

Copyright and license

Copyright 2017 Zendesk, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.

You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.