Class: ScoutApm::LayerConverters::MetricConverter

Inherits:
ConverterBase
  • Object
show all
Defined in:
lib/scout_apm/layer_converters/metric_converter.rb

Instance Attribute Summary

Attributes inherited from ConverterBase

#request, #root_layer, #walker

Instance Method Summary collapse

Methods inherited from ConverterBase

#find_first_layer_of_type, #initialize, #scope_layer

Constructor Details

This class inherits a constructor from ScoutApm::LayerConverters::ConverterBase

Instance Method Details

#call ⇒ Object 



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# File 'lib/scout_apm/layer_converters/metric_converter.rb', line 6

def call
  scope = scope_layer

  # TODO: Track requests that never reach a Controller (for example, when
  # Middleware decides to return rather than passing onward)
  return {} unless scope

  create_metrics
end

#create_metrics ⇒ Object

Full metrics from this request. These get aggregated in Store for the overview metrics, or stored permanently in a SlowTransaction Some merging of metrics will happen here, so if a request calls the same ActiveRecord or View repeatedly, it’ll get merged.



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# File 'lib/scout_apm/layer_converters/metric_converter.rb', line 20

def create_metrics
  metric_hash = Hash.new

  walker.walk do |layer|
    next if layer.annotations[:ignorable]

    meta_options = if layer == scope_layer # We don't scope the controller under itself
                    {}
                  else
                    {:scope => scope_layer.legacy_metric_name}
                  end

    # we don't need to use the full metric name for scoped metrics as we only display metrics aggregrated
    # by type.
    metric_name = meta_options.has_key?(:scope) ? layer.type : layer.legacy_metric_name

    meta = MetricMeta.new(metric_name, meta_options)
    metric_hash[meta] ||= MetricStats.new( meta_options.has_key?(:scope) )

    stat = metric_hash[meta]
    stat.update!(layer.total_call_time, layer.total_exclusive_time)
  end
  metric_hash
end