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# frozen_string_literal: true
module Gitlab
module Metrics
module Exporter
class BaseExporter < Daemon
attr_reader :server
def enabled?
settings.enabled
end
def settings
raise NotImplementedError
end
def log_filename
raise NotImplementedError
end
private
def start_working
logger = WEBrick::Log.new(log_filename)
logger.time_format = "[%Y-%m-%dT%H:%M:%S.%L%z]"
access_log = [
[logger, WEBrick::AccessLog::COMBINED_LOG_FORMAT]
]
@server = ::WEBrick::HTTPServer.new(
Port: settings.port, BindAddress: settings.address,
Logger: logger, AccessLog: access_log)
server.mount "/", Rack::Handler::WEBrick, rack_app
server.start
end
def stop_working
if server # rubocop:disable Cop/LineBreakAroundConditionalBlock
server.shutdown
server.listeners.each(&:close)
end
@server = nil
end
def rack_app
Rack::Builder.app do
use Rack::Deflater
use ::Prometheus::Client::Rack::Exporter if ::Gitlab::Metrics.metrics_folder_present?
run -> (env) { [404, {}, ['']] }
end
end
end
end
end
end
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