Module: Datadog::Tracing::Contrib::Karafka::MessagesPatch

Defined in:
lib/datadog/tracing/contrib/karafka/patcher.rb

Overview

Patch to add tracing to Karafka::Messages::Messages

Instance Method Summary collapse

Instance Method Details

#configuration ⇒ Object 



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# File 'lib/datadog/tracing/contrib/karafka/patcher.rb', line 13

def configuration
  Datadog.configuration.tracing[:karafka]
end

#each(&block) ⇒ Object

each is the most popular access point to Karafka messages, but not the only one

Other access patterns do not have a straightforward tracing avenue

(e.g. ‘my_batch_operation messages.payloads`)

See Also:



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# File 'lib/datadog/tracing/contrib/karafka/patcher.rb', line 26

def each(&block)
  @messages_array.each do |message|
    trace_digest = if configuration[:distributed_tracing]
      headers = if message.metadata.respond_to?(:raw_headers)
        message.metadata.raw_headers
      else
        message.metadata.headers
      end
      Karafka.extract(headers)
    end

    Tracing.trace(Ext::SPAN_MESSAGE_CONSUME, continue_from: trace_digest) do |span, trace|
      if Datadog::DataStreams.enabled?
        begin
          headers = if message.metadata.respond_to?(:raw_headers)
            message.metadata.raw_headers
          else
            message.metadata.headers
          end

          Datadog::DataStreams.set_consume_checkpoint(
            type: 'kafka',
            source: message.topic,
            auto_instrumentation: true
          ) { |key| headers[key] }
        rescue => e
          Datadog.logger.debug("Error setting DSM checkpoint: #{e.class}: #{e}")
        end
      end

      span.set_tag(Ext::TAG_OFFSET, message.metadata.offset)
      span.set_tag(Contrib::Ext::Messaging::TAG_DESTINATION, message.topic)
      span.set_tag(Contrib::Ext::Messaging::TAG_SYSTEM, Ext::TAG_SYSTEM)

      span.resource = message.topic

      yield message
    end
  end
end

#propagation ⇒ Object 



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# File 'lib/datadog/tracing/contrib/karafka/patcher.rb', line 17

def propagation
  @propagation ||= Contrib::Karafka::Distributed::Propagation.new
end