Class: ScoutApm::Serializers::MetricsToJsonSerializer

Inherits:
Object
  • Object
show all
Defined in:
lib/scout_apm/serializers/metrics_to_json_serializer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(metrics) ⇒ MetricsToJsonSerializer

A hash of meta => stat pairs



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# File 'lib/scout_apm/serializers/metrics_to_json_serializer.rb', line 7

def initialize(metrics)
  @metrics = metrics
end

Instance Attribute Details

#metrics ⇒ Object (readonly)

Returns the value of attribute metrics.



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# File 'lib/scout_apm/serializers/metrics_to_json_serializer.rb', line 4

def metrics
  @metrics
end

Instance Method Details

#as_json ⇒ Object 



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# File 'lib/scout_apm/serializers/metrics_to_json_serializer.rb', line 11

def as_json
  if metrics
    metrics.map{|meta, stat| metric_as_json(meta, stat) }
  else
    nil
  end
end

#metric_as_json(meta, stat, child_metrics = {}) ⇒ Object

Children metrics is a hash of meta=>stat pairs. Leave empty for no children. Supports only a single-level nesting, until we have redone metric classes, instead of Meta and Stats



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# File 'lib/scout_apm/serializers/metrics_to_json_serializer.rb', line 22

def metric_as_json(meta, stat, child_metrics={})
  { "bucket" => meta.type,
    "name" => meta.name, # No scope values needed here, since it's implied by the nesting.

    "count" => stat.call_count,
    "total_call_time" => stat.total_call_time,
    "total_exclusive_time" => stat.total_exclusive_time,
    "min_call_time" => stat.min_call_time,
    "max_call_time" => stat.max_call_time,

    # Pretty unsure how to synthesize histograms out of what we store now
    "total_histogram" => [
      [stat.total_exclusive_time / stat.call_count, stat.call_count],
    ],
    "exclusive_histogram" => [
      [stat.total_exclusive_time / stat.call_count, stat.call_count]
    ],

    "metrics" => transform_child_metrics(child_metrics),

    # Will later hold the exact SQL, or URL or whatever other detail
    # about this query is necessary
    "detail" => { :desc => meta.desc }.merge(meta.extra || {}),
  }
end

#transform_child_metrics(metrics) ⇒ Object 



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# File 'lib/scout_apm/serializers/metrics_to_json_serializer.rb', line 48

def transform_child_metrics(metrics)
  metrics.map do |meta, stat|
    metric_as_json(meta, stat)
  end
end