Method: OneApm::Agent::CrossAppMonitor#register_event_listeners

Defined in:
lib/one_apm/agent/cross_app/cross_app_monitor.rb

#register_event_listeners(events) ⇒ Object

Expected sequence of events:

:before_call will save our cross application request id to the thread
:after_call will write our response headers/metrics and clean up the thread



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# File 'lib/one_apm/agent/cross_app/cross_app_monitor.rb', line 28

def register_event_listeners(events)
  OneApm::Manager.logger.
    debug("Wiring up Cross Application Tracing to events after finished configuring")

  events.subscribe(:before_call) do |env|
    if should_process_request(env)
      state = OneApm::TransactionState.tl_get

      save_client_cross_app_id(state, env)
      save_referring_transaction_info(state, env)
      set_transaction_custom_parameters(state)
    end
  end

  events.subscribe(:after_call) do |env, (_status_code, headers, _body)|
    state = OneApm::TransactionState.tl_get

    insert_response_header(state, env, headers)
  end

  events.subscribe(:notice_error) do |_, options|
    state = OneApm::TransactionState.tl_get

    set_error_custom_parameters(state, options)
  end
end