Module: NewRelic::Agent::Instrumentation::QueueTime

Included in:

ControllerInstrumentation

Defined in:

lib/new_relic/agent/instrumentation/queue_time.rb

Constant Summary

MAIN_HEADER =

'HTTP_X_REQUEST_START'

MIDDLEWARE_HEADER =

'HTTP_X_MIDDLEWARE_START'

QUEUE_HEADER =

'HTTP_X_QUEUE_START'

ALT_QUEUE_HEADER =

'HTTP_X_QUEUE_TIME'

HEROKU_QUEUE_HEADER =

'HTTP_X_HEROKU_QUEUE_WAIT_TIME'

APP_HEADER =

'HTTP_X_APPLICATION_START'

HEADER_REGEX =

/([^\s\/,(t=)]+)? ?t=([0-9]+)/

SERVER_METRIC =

'WebFrontend/WebServer/'

MIDDLEWARE_METRIC =

'Middleware/'

ALL_SERVER_METRIC =

no individual queue metric - more than one queue?!

'WebFrontend/WebServer/all'

ALL_MIDDLEWARE_METRIC =

'Middleware/all'

ALL_QUEUE_METRIC =

'WebFrontend/QueueTime'

Instance Method Summary

• #parse_frontend_headers(headers) ⇒ Object

Instance Method Details

#parse_frontend_headers(headers) ⇒ Object

# File 'lib/new_relic/agent/instrumentation/queue_time.rb', line 22

def parse_frontend_headers(headers)
  # these methods add internal state, so we dup so other parts
  # of the app don't have to worry about it.
  # May have performance implications with very large env hashes
  env = headers.dup
  add_end_time_header(Time.now, env)
  middleware_start = parse_middleware_time_from(env)
  queue_start = parse_queue_time_from(env)
  server_start = parse_server_time_from(env)
  # returned for the controller instrumentation
  [middleware_start, queue_start, server_start].min
end