Contents

# frozen_string_literal: true
# typed: true

require_relative 'fetcher'
require_relative '../../../distributed/b3'
require_relative '../../../distributed/b3_single'
require_relative '../../../distributed/datadog'
require_relative '../../../distributed/propagation'

module Datadog
  module Tracing
    module Contrib
      module GRPC
        module Distributed
          # Extracts and injects propagation through gRPC metadata.
          # @see https://github.com/grpc/grpc-go/blob/v1.50.1/Documentation/grpc-metadata.md
          class Propagation < Tracing::Distributed::Propagation
            def initialize
              super(
                propagation_styles: {
                  Tracing::Configuration::Ext::Distributed::PROPAGATION_STYLE_B3 =>
                    Tracing::Distributed::B3.new(fetcher: Fetcher),
                  Tracing::Configuration::Ext::Distributed::PROPAGATION_STYLE_B3_SINGLE_HEADER =>
                    Tracing::Distributed::B3Single.new(fetcher: Fetcher),
                  Tracing::Configuration::Ext::Distributed::PROPAGATION_STYLE_DATADOG =>
                    Tracing::Distributed::Datadog.new(fetcher: Fetcher)
                })
            end

            # DEV: Singleton kept until a larger refactor is performed.
            # DEV: See {Datadog::Tracing::Distributed::Propagation#initialize} for more information.
            INSTANCE = Propagation.new
          end
        end
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
ddtrace-1.7.0	lib/datadog/tracing/contrib/grpc/distributed/propagation.rb