Module: Karafka::Pro::Processing::Strategies::Dlq::FtrLrj

Includes:
Lrj, Lrj::Ftr
Included in:
FtrLrjVp
Defined in:
lib/karafka/pro/processing/strategies/dlq/ftr_lrj.rb

Overview

Dead-Letter Queue enabled Filtering enabled Long-Running Job enabled

Constant Summary collapse

FEATURES =

Features for this strategy

%i[
  dead_letter_queue
  filtering
  long_running_job
].freeze

Constants included from Lrj::Default

Lrj::Default::MAX_PAUSE_TIME

Instance Method Summary collapse

Methods included from Lrj::Default

#handle_before_enqueue, #handle_revoked

Methods included from Karafka::Pro::Processing::Strategies::Default

#handle_before_consume, #handle_before_enqueue, #handle_consume, #handle_revoked

Methods included from Karafka::Processing::Strategies::Default

#commit_offsets, #commit_offsets!, #handle_before_consume, #handle_before_enqueue, #handle_consume, #handle_idle, #handle_revoked, #handle_shutdown, #mark_as_consumed, #mark_as_consumed!

Methods included from Karafka::Processing::Strategies::Base

#handle_before_consume, #handle_before_enqueue, #handle_consume, #handle_idle, #handle_revoked, #handle_shutdown

Methods included from Ftr::Default

#handle_idle, #handle_post_filtering

Methods included from Default

#build_dlq_message, #dispatch_to_dlq, #dispatch_to_dlq?, #find_skippable_message

Instance Method Details

#handle_after_consume ⇒ Object

This is one of more complex cases. We need to ensure, that we always resume (inline or via paused backoff) and we need to make sure we dispatch to DLQ when needed. Because revocation on LRJ can happen any time, we need to make sure we do not dispatch to DLQ when error happens but we no longer own the assignment. Throttling is another factor that has to be taken into consideration on the successful path



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# File 'lib/karafka/pro/processing/strategies/dlq/ftr_lrj.rb', line 39

def handle_after_consume
  coordinator.on_finished do |last_group_message|
    if coordinator.success?
      coordinator.pause_tracker.reset

      return if coordinator.manual_pause?

      mark_as_consumed(last_group_message) unless revoked?

      if coordinator.filtered? && !revoked?
        handle_post_filtering
      elsif !revoked? && !coordinator.manual_seek?
        seek(coordinator.seek_offset, false)
        resume
      else
        resume
      end
    elsif coordinator.pause_tracker.attempt <= topic.dead_letter_queue.max_retries
      retry_after_pause
    else
      coordinator.pause_tracker.reset

      return resume if revoked?

      skippable_message, = find_skippable_message
      dispatch_to_dlq(skippable_message) if dispatch_to_dlq?
      mark_as_consumed(skippable_message)
      pause(coordinator.seek_offset, nil, false)
    end
  end
end