Rails

Rails example

This minimal Rails application exposes GET /flags/:key?user_key=... and returns FeatBit evaluation details as JSON.

The FeatBitClientRegistry creates the client lazily on the first request. This keeps background threads out of a preloaded master process and guarantees one client per Rails worker process. at_exit closes the client during graceful shutdown.

cd examples/Rails
bundle install

FEATBIT_ENV_SECRET="..." bundle exec rails server

Then request:

curl "http://localhost:3000/flags/game-runner?user_key=rails-user"

For Puma cluster mode, keep the registry lazy so each worker creates its own WebSocket connection after fork.