Ruby Context

This gem allows you to define and override global values inspired in Reactjs Context api

You can use this gem in any ruby project, including Rails.

Add this line to your application's Gemfile:

gem 'ruby_context'

And then execute:

$ bundle

imagine you want to override rails logger

Create a config/initializers/app_logger.rb

# Default value isn't necessary, but good

APP_LOGGER = Context::Context.new(default_value: Rails.logger)

Image you have a worker called send_mail_worker.rb and you want that every call to Rails.logger should be override to a different log.

class SendMailWorker
    def do_work
       email_logger = Logger.new
       APP_LOGGER.with(email_logger) do
           MailService.run!
       end
    end
end

So now every calls of APP_LOGGER will not call Rails.logger anymore, but email_logger!

class MailService
    def self.run!
       APP_LOGGER.info "runing mail service"
       OtherClass.execute!
    end
end

class OtherClass
    def self.execute!
       APP_LOGGER.info "executing"
    end
end

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/[USERNAME]/context. 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.

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

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