Class: Fluent::MetricSenseOutput::Backends::DatadogBackend

Inherits:
Fluent::MetricSenseOutput::Backend show all
Defined in:
lib/fluent/plugin/backends/datadog_backend.rb

Constant Summary

Constants inherited from Fluent::MetricSenseOutput::Backend

Fluent::MetricSenseOutput::Backend::UpdateMode

Instance Attribute Summary

Attributes inherited from Fluent::MetricSenseOutput::Backend

#log

Instance Method Summary collapse

Methods inherited from Fluent::MetricSenseOutput::Backend

#shutdown, #start

Constructor Details

#initialize ⇒ DatadogBackend

Returns a new instance of DatadogBackend.



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# File 'lib/fluent/plugin/backends/datadog_backend.rb', line 31

def initialize()
  super
  require "dogapi"
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/backends/datadog_backend.rb', line 36

def configure(conf)
  super

  if @dd_api_key.nil?
    raise Fluent::ConfigError, "missing Datadog API key"
  end

  silent = false # raise exceptions on dogapi errors
  @dog = Dogapi::Client.new(@dd_api_key, @dd_app_key, @host, @device, silent, @timeout)
end

#write(data) ⇒ Object 



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# File 'lib/fluent/plugin/backends/datadog_backend.rb', line 47

def write(data)
  data.each_slice(@batch_size) do |slice|
    metric_points = {}
    slice.each do |tag, time, value, seg_key, seg_val|
      if seg_key and seg_val
        # segmented values
        metric = "#{tag}_by_#{seg_key}"
        segment = "#{seg_key}:#{seg_val}"
      else
        # simple values
        metric = tag
        segment = ""
      end
      metric_points[metric] ||= {}
      metric_points[metric][segment] ||= []
      metric_points[metric][segment].push([Time.at(time), value])
    end

    metric_points.each do |metric, segment_points|
      segment_points.each do |segment, points|
        tags = @tags.dup
        if segment and not segment.empty?
          tags.push(segment)
        end

        options = {}
        options[:tags] = tags
        options[:host] = @host if @host
        options[:type] = "gauge"

        log.debug("datadog emit points: metric=#{metric}, points=#{points.inspect}, options=#{options.inspect}")
        begin
          code, response = @dog.emit_points(metric, points, options)
        rescue Exception => error
          # dogapi may raise an Exception.
          # fluentd expects StandardError as retriable error, though.
          raise("datadog error: #{error.class}: #{error.message}")
        end
        if code.to_i / 100 != 2
          raise("datadog error: HTTP #{code}: #{response.inspect}")
        end
      end
    end
  end
end