I've got a simple Sinatra app that I'd like to share a variable across all sessions and requests.

```
configure do
  @@click_count = 0
end

def send_message(text)
  # ignore, this part works
end

post '/click' do
  @@click_count = @@click_count + 1
  send_message "clicks: #{@@click_count}"
end

```

**The message sent is always `clicks: 1` instead of incrementing.** I've also tried `set :click_count, 0` and then `settings.click_count = settings.click_count + 1` but I still get the same thing.

I'm running the server locally with shotgun using `shotgun web.rb -p 4567 -E production` because another question mentioned in non-production environments the server is restarted on each request which loses the state.

Any ideas how to get this to work?