NewRelic::Rack middleware not exposing Sinatra::Base settings - rack

Question

I have a modular Sinatra app, where I use
run Rack::URLMap
to add various services, where each service is a Sinatra::Base
I've added a middleware in one of the services that uses the settings method. It seems that the NewRelic rack middlewares are not exposing this method.
class MyService < Sinatra::Base
configure do
set :optional_auth, [
{ method: :get, path: ''},
{ method: :get, path: '/:id'},
{ method: :get, path: '/:id/attachments'},
{ method: :get, path: '/:id/comments'}
]
mime_type :json, 'application/json'
use Rack::PostBodyContentTypeParser
use MyMiddleware
end
get '/' ....
Locally, things work fine, however, when deployed, it seems that MyMiddleware is being added after NewRelic::Rack, so when the middleware is invoked, the #app is no longer MyService, it's NewRelic::Rack without the exposed settings method.
Has anyone else experienced this? I'm running the application with bundle exec puma

Answer 1

I was able to work around this by updating my middleware
def initialize app, &block
#app = app
#block = block
end
def call env
#block.call(env)
do_something(env[:my_middleware_option])
...
#app.call(env)
end
And initializing my middleware with
use MyMiddleware do |env|
env[:my_middleware_option] = "any data type"
end