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# This grape_logging module (https://github.com/aserafin/grape_logging) makes it
# possible to log how much time an API request was queued by Workhorse.
module Gitlab
module GrapeLogging
module Loggers
class QueueDurationLogger < ::GrapeLogging::Loggers::Base
attr_accessor :start_time
def before
@start_time = Time.now
end
def parameters(request, _)
proxy_start = request.env['HTTP_GITLAB_WORKHORSE_PROXY_START'].presence
return {} unless proxy_start && start_time
# Time in milliseconds since gitlab-workhorse started the request
duration = (start_time.to_f * 1_000 - proxy_start.to_f / 1_000_000).round(2)
{ 'queue_duration': duration }
end
end
end
end
end
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