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module Gitlab
module Metrics
class ConnectionRackMiddleware
def initialize(app)
@app = app
end
def self.rack_request_count
@rack_request_count ||= Gitlab::Metrics.counter(:rack_request, 'Rack request count')
end
def self.rack_response_count
@rack_response_count ||= Gitlab::Metrics.counter(:rack_response, 'Rack response count')
end
def self.rack_uncaught_errors_count
@rack_uncaught_errors_count ||= Gitlab::Metrics.counter(:rack_uncaught_errors, 'Rack connections handling uncaught errors count')
end
def self.rack_execution_time
@rack_execution_time ||= Gitlab::Metrics.histogram(:rack_execution_time, 'Rack connection handling execution time',
{}, [0.05, 0.1, 0.25, 0.5, 0.7, 1, 1.5, 2, 2.5, 3, 5, 7, 10])
end
def call(env)
method = env['REQUEST_METHOD'].downcase
started = Time.now.to_f
begin
ConnectionRackMiddleware.rack_request_count.increment(method: method)
status, headers, body = @app.call(env)
ConnectionRackMiddleware.rack_response_count.increment(method: method, status: status)
[status, headers, body]
rescue
ConnectionRackMiddleware.rack_uncaught_errors_count.increment
raise
ensure
elapsed = Time.now.to_f - started
ConnectionRackMiddleware.rack_execution_time.observe({}, elapsed)
end
end
end
end
end
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