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# frozen_string_literal: true
module Gitlab
module Metrics
# Rack middleware for tracking Rails and Grape requests.
class RackMiddleware
def initialize(app)
@app = app
end
# env - A Hash containing Rack environment details.
def call(env)
trans = Gitlab::Metrics::WebTransaction.new(env)
begin
retval = trans.run { @app.call(env) }
rescue Exception => error # rubocop: disable Lint/RescueException
trans.add_event(:rails_exception)
raise error
retval