Class: OneApm::Agent::Instrumentation::ActionViewSubscriber::RenderEvent

Inherits:
Event
  • Object
show all
Defined in:
lib/one_apm/inst/rails4/action_view_subscriber.rb

Instance Attribute Summary

Attributes inherited from Event

#children, #end, #frame, #name, #parent, #payload, #time, #transaction_id

Instance Method Summary collapse

Methods inherited from Event

#<<, #duration, #initialize, #parent_of?

Constructor Details

This class inherits a constructor from OneApm::Agent::Instrumentation::Event

Instance Method Details

#metric_action(name) ⇒ Object 



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# File 'lib/one_apm/inst/rails4/action_view_subscriber.rb', line 82

def metric_action(name)
  case name
  when /render_template.action_view$/  then 'Rendering'
  when 'render_partial.action_view'    then 'Partial'
  when 'render_collection.action_view' then 'Partial'
  end
end

#metric_name ⇒ Object 



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# File 'lib/one_apm/inst/rails4/action_view_subscriber.rb', line 55

def metric_name
  if parent && (payload[:virtual_path] ||
                (parent.payload[:identifier] =~ /template$/))
    return parent.metric_name
  elsif payload.key?(:virtual_path)
    identifier = payload[:virtual_path]
  else
    identifier = payload[:identifier]
  end

  # memoize
  @metric_name ||= "View/#{metric_path(identifier)}/#{metric_action(name)}"
  @metric_name
end

#metric_path(identifier) ⇒ Object 



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# File 'lib/one_apm/inst/rails4/action_view_subscriber.rb', line 70

def metric_path(identifier)
  if identifier == nil
    'file'
  elsif identifier =~ /template$/
    identifier
  elsif (parts = identifier.split('/')).size > 1
    parts[-2..-1].join('/')
  else
    OneApm::Transaction::OA_UNKNOWN_METRIC
  end
end

#recordable? ⇒ Boolean

Nearly every “render_blah.action_view” event has a child in the form of “!render_blah.action_view”. The children are the ones we want to record. There are a couple special cases of events without children.

Returns:

  • (Boolean) 


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# File 'lib/one_apm/inst/rails4/action_view_subscriber.rb', line 49

def recordable?
  name[0] == '!' ||
    metric_name == 'View/text template/Rendering' ||
    metric_name == "View/#{OneApm::Transaction::OA_UNKNOWN_METRIC}/Partial"
end