gitlab-org--gitlab-foss/lib/gitlab/query_limiting/middleware.rb
Yorick Peterse cca61980d5
Track and act upon the number of executed queries
This ensures that we have more visibility in the number of SQL queries
that are executed in web requests. The current threshold is hardcoded to
100 as we will rarely (maybe once or twice) change it.

In production and development we use Sentry if enabled, in the test
environment we raise an error. This feature is also only enabled in
production/staging when running on GitLab.com as it's not very useful to
other users.
2018-02-01 17:00:46 +01:00

55 lines
1.2 KiB
Ruby

# frozen_string_literal: true
module Gitlab
module QueryLimiting
# Middleware for reporting (or raising) when a request performs more than a
# certain amount of database queries.
class Middleware
CONTROLLER_KEY = 'action_controller.instance'.freeze
ENDPOINT_KEY = 'api.endpoint'.freeze
def initialize(app)
@app = app
end
def call(env)
transaction, retval = Transaction.run do
@app.call(env)
end
transaction.action = action_name(env)
transaction.act_upon_results
retval
end
def action_name(env)
if env[CONTROLLER_KEY]
action_for_rails(env)
elsif env[ENDPOINT_KEY]
action_for_grape(env)
end
end
private
def action_for_rails(env)
controller = env[CONTROLLER_KEY]
action = "#{controller.class.name}##{controller.action_name}"
if controller.content_type == 'text/html'
action
else
"#{action} (#{controller.content_type})"
end
end
def action_for_grape(env)
endpoint = env[ENDPOINT_KEY]
route = endpoint.route rescue nil
"#{route.request_method} #{route.path}" if route
end
end
end
end