Class: ScoutApm::LayerConverters::DatabaseConverter

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

Constant Summary

Constants inherited from ConverterBase

ConverterBase::MAX_METRICS

Instance Attribute Summary

Attributes inherited from ConverterBase

#context, #layer_finder, #request, #root_layer

Instance Method Summary collapse

Methods inherited from ConverterBase

#attach_backtraces, #limited?, #make_meta_options, #make_meta_options_desc_hash, #make_meta_options_scope, #over_metric_limit?, #scope_layer, #store_aggregate_metric, #store_backtrace, #store_specific_metric, #subscope_name, #subscoped?

Constructor Details

#initialize ⇒ DatabaseConverter

Returns a new instance of DatabaseConverter.



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# File 'lib/scout_apm/layer_converters/database_converter.rb', line 4

def initialize(*)
  super
  @db_query_metric_set = DbQueryMetricSet.new(context)
end

Instance Method Details

#record! ⇒ Object 



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# File 'lib/scout_apm/layer_converters/database_converter.rb', line 28

def record!
  # Everything in the metric set here is from a single transaction, which
  # we want to keep track of. (One web call did a User#find 10 times, but
  # only due to 1 http request)
  @db_query_metric_set.increment_transaction_count!
  @store.track_db_query_metrics!(@db_query_metric_set)

  nil # not returning anything in the layer results ... not used
end

#register_hooks(walker) ⇒ Object 



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# File 'lib/scout_apm/layer_converters/database_converter.rb', line 9

def register_hooks(walker)
  super

  return unless scope_layer

  walker.on do |layer|
    next if skip_layer?(layer)
    stat = DbQueryMetricStats.new(
      model_name(layer),
      operation_name(layer),
      scope_layer.legacy_metric_name, # controller_scope
      1,                              # count, this is a single query, so 1
      layer.total_call_time,
      records_returned(layer)
    )
    @db_query_metric_set << stat
  end
end

#skip_layer?(layer) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/scout_apm/layer_converters/database_converter.rb', line 38

def skip_layer?(layer)
  layer.type != 'ActiveRecord' ||
    layer.limited? ||
    super
end