Module: Datadog::OpenTelemetry::Configuration::Settings

Included in:
Core::Configuration::Settings
Defined in:
lib/datadog/opentelemetry/configuration/settings.rb

Class Method Summary collapse

Class Method Details

.add_settings!(base) ⇒ Object 



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# File 'lib/datadog/opentelemetry/configuration/settings.rb', line 61

def self.add_settings!(base)
  base.class_eval do
    settings :opentelemetry do
      settings :exporter do
        option :protocol do |o|
          o.type :string
          o.setter(&Settings.normalize_protocol('OTEL_EXPORTER_OTLP_PROTOCOL'))
          o.env 'OTEL_EXPORTER_OTLP_PROTOCOL'
          o.default 'http/protobuf'
        end

        option :timeout_millis do |o|
          o.type :int
          o.env 'OTEL_EXPORTER_OTLP_TIMEOUT'
          o.default 10_000
        end

        option :headers do |o|
          o.type :hash
          o.env 'OTEL_EXPORTER_OTLP_HEADERS'
          o.default { {} }
          o.env_parser(&Settings.headers_parser('OTEL_EXPORTER_OTLP_HEADERS'))
        end

        option :endpoint do |o|
          o.type :string, nilable: true
          o.env 'OTEL_EXPORTER_OTLP_ENDPOINT'
          o.default nil
        end
      end

      settings :metrics do
        # Metrics-specific options default to nil to detect unset state.
        # If a metrics-specific env var (e.g., OTEL_EXPORTER_OTLP_METRICS_TIMEOUT) is not set,
        # we fall back to the general OTLP env var (e.g., OTEL_EXPORTER_OTLP_TIMEOUT) per OpenTelemetry spec.
        option :enabled do |o|
          o.type :bool
          o.env 'DD_METRICS_OTEL_ENABLED'
          o.default false
        end

        option :exporter do |o|
          o.type :string
          o.env 'OTEL_METRICS_EXPORTER'
          o.default 'otlp'
        end

        option :export_interval_millis do |o|
          o.type :int
          o.env 'OTEL_METRIC_EXPORT_INTERVAL'
          o.default 10_000
        end

        option :export_timeout_millis do |o|
          o.type :int
          o.env 'OTEL_METRIC_EXPORT_TIMEOUT'
          o.default 7_500
        end

        option :temporality_preference do |o|
          o.type :string
          o.env 'OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE'
          o.default 'delta'
          o.setter(&Settings.normalize_temporality_preference('OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE'))
        end

        option :endpoint do |o|
          o.type :string, nilable: true
          o.env 'OTEL_EXPORTER_OTLP_METRICS_ENDPOINT'
          o.default nil
        end

        option :headers do |o|
          o.type :hash, nilable: true
          o.env 'OTEL_EXPORTER_OTLP_METRICS_HEADERS'
          o.default nil
          o.env_parser(&Settings.headers_parser('OTEL_EXPORTER_OTLP_METRICS_HEADERS'))
        end

        option :timeout_millis do |o|
          o.type :int, nilable: true
          o.env 'OTEL_EXPORTER_OTLP_METRICS_TIMEOUT'
          o.default nil
        end

        option :protocol do |o|
          o.type :string, nilable: true
          o.env 'OTEL_EXPORTER_OTLP_METRICS_PROTOCOL'
          o.default nil
          o.setter(&Settings.normalize_protocol('OTEL_EXPORTER_OTLP_METRICS_PROTOCOL'))
        end
      end
    end
  end
end

.extended(base) ⇒ Object 



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# File 'lib/datadog/opentelemetry/configuration/settings.rb', line 9

def self.extended(base)
  base = base.singleton_class unless base.is_a?(Class)
  add_settings!(base)
end

.headers_parser(env_var_name) ⇒ Object 



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# File 'lib/datadog/opentelemetry/configuration/settings.rb', line 34

def self.headers_parser(env_var_name)
  lambda do |value|
    return {} if value.nil? || value.empty?

    headers = {}
    header_items = value.split(',')
    header_items.each do |key_value|
      key, header_value = key_value.split('=', 2)
      # If header is malformed, return an empty hash
      if key.nil? || header_value.nil?
        Datadog.logger.warn("#{env_var_name} has malformed header: #{key_value.inspect}")
        return {}
      end

      key.strip!
      header_value.strip!
      if key.empty? || header_value.empty?
        Datadog.logger.warn("#{env_var_name} has empty key or value in: #{key_value.inspect}")
        return {}
      end

      headers[key] = header_value
    end
    headers
  end
end

.normalize_protocol(env_var_name) ⇒ Object 



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# File 'lib/datadog/opentelemetry/configuration/settings.rb', line 25

def self.normalize_protocol(env_var_name)
  proc do |value|
    if value && value.to_s.downcase != 'http/protobuf'
      Datadog.logger.warn("#{env_var_name}=#{value} is not supported. Using http/protobuf instead.")
    end
    'http/protobuf'
  end
end

.normalize_temporality_preference(env_var_name) ⇒ Object 



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# File 'lib/datadog/opentelemetry/configuration/settings.rb', line 14

def self.normalize_temporality_preference(env_var_name)
  proc do |value|
    if value && value.to_s.downcase != 'delta' && value.to_s.downcase != 'cumulative'
      Datadog.logger.warn("#{env_var_name}=#{value} is not supported. Using delta instead.")
      'delta'
    else
      value
    end
  end
end