reloadable_midleware

Makes any Rack middleware reloadable. Or, rather - wraps a given piece of Rack middleware with a special module, which will call .new on your middleware at call() time, not at instantiation time. This means that the Rack application stack is not going to contain an object reference and will be able to reload during constant teardown/setup.

Replace your standard middleware initialization block:

use CustomAuthentication, option: 'bar'

with this alteration:

use ReloadableMiddleware.wrap(CustomAuthentication), option: 'bar'

This will make your middleware reloadable. In Rails, use

Rails.application.config.middleware.use ReloadableMiddleware.wrap(MyMiddleware)

If you are running with RACK_ENV set to production or with Rails.env.production? == true the reloading will be disabled and you will have one instance of your middleware as usual. This reduces object churn, since Rack assumes that your entire app stack is going to be built once and then cached between requests - which helps performance.

Add this line to your application's Gemfile:

gem 'reloadable_middleware'

And then execute:

$ bundle

Or install it yourself as:

$ gem install reloadable_middleware

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/julik/reloadable_middleware.