Class: Fluent::Plugin::ForwardedCMetricsParserFilter

Inherits:
Filter
  • Object
show all
Defined in:
lib/fluent/plugin/filter_forwarded_cmetrics_parser.rb

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_forwarded_cmetrics_parser.rb', line 38

def configure(conf)
  super
  @labels_accessor = record_accessor_create(@cmetrics_labels_key)
  @fields_accessors = {}
  conf.elements(name: "fields").each do |e|
    e.each_pair{|k, _v|
      e.has_key?(k) # Suppress unused warnings.
      @fields_accessors[k] = record_accessor_create(k)
    }
  end
end

#filter_stream(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/filter_forwarded_cmetrics_parser.rb', line 98

def filter_stream(tag, es)
  new_es = Fluent::MultiEventStream.new
  es.each do |time, record|
    extra_fields = {}
    cmetrics = parse_cmetrics_hash(record)
    cmetrics.each do |metric|
      next if metric.empty?

      @fields_accessors.each do |key, accessor|
        extra_fields[key] = accessor.call(metric)
      end
      if @format_to_splunk_metric
        metric["name"], dims = format_to_splunk_style_with_dims(metric)
        if @dimensions_key
          metric[@dimensions_key] = dims
        else
          metric.merge!(dims)
        end
      end
      if @fields_accessors
        metric.merge!(extra_fields)
      end
      time = Time.at(metric.delete("timestamp"))
      new_es.add(Fluent::EventTime.new(time.to_i, time.nsec), metric)
    end
  end
  new_es
end

#format_to_splunk_style_with_dims(metric) ⇒ Object 



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# File 'lib/fluent/plugin/filter_forwarded_cmetrics_parser.rb', line 85

def format_to_splunk_style_with_dims(metric)
  subsystem = metric.delete("subsystem")
  # labels will be treated as dimensions.
  dimensions = Hash.new(0)
  if labels = @labels_accessor.call(metric)
    labels.map {|k,v|
      dimensions[k] = v
    }
  end
  name = metric.delete("name")
  return [subsystem, name].compact.reject{|e| e.empty?}.join("."), dimensions
end

#parse_cmetrics_hash(record) ⇒ Object 



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# File 'lib/fluent/plugin/filter_forwarded_cmetrics_parser.rb', line 50

def parse_cmetrics_hash(record)
  cmetrics = []
  record.each do |payload|
    payload["metrics"].each do |metric|
      labels = []
      opts = metric["meta"]["opts"]
      unless metric["meta"]["labels"].empty?
        metric["meta"]["labels"].each do |k_label|
          labels << k_label
        end
      end
      metric["values"].each do |entry|
        cmetric = {
          "namespace" => opts["ns"],
          "subsystem" => opts["ss"],
          "name" => opts["name"],
          "value" => entry["value"],
          "description" => opts["desc"],
          "timestamp" => entry["ts"] / 1000000000.0
        }
        unless labels.empty?
          params = {}
          entry["labels"].each_with_index do |v_label, index|
            label = labels[index]
            params[label] = v_label
          end
          cmetric["labels"] = params
        end
        cmetrics << cmetric
      end
    end
  end
  cmetrics
end