Module: Karafka::Pro::Processing::Strategies::Lrj::FtrMom

Includes:
Ftr
Included in:
Aj::FtrLrjMom, Aj::FtrLrjMomVp, FtrMomVp
Defined in:
lib/karafka/pro/processing/strategies/lrj/ftr_mom.rb

Overview

Long-Running Job enabled Filtering enabled Manual offset management enabled

It is really similar to the Lrj::Ftr but we do not mark anything as consumed

Constant Summary collapse

FEATURES =

Features for this strategy

%i[
  filtering
  long_running_job
  manual_offset_management
].freeze

Constants included from Default

Default::MAX_PAUSE_TIME

Instance Method Summary collapse

Methods included from Default

#handle_before_schedule_consume, #handle_revoked, #synchronize

Methods included from Default

#handle_before_consume, #handle_before_schedule_consume, #handle_before_schedule_tick, #handle_consume, #handle_revoked, #handle_tick, #mark_as_consumed, #mark_as_consumed!, #mark_in_memory, #mark_in_transaction, #mark_with_transaction, #store_offset_metadata, #transaction

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

#commit_offsets, #commit_offsets!, #handle_before_consume, #handle_consume, #handle_eofed, #handle_idle, #handle_initialized, #handle_revoked, #handle_shutdown, #handle_wrap, #mark_as_consumed, #mark_as_consumed!

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

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

Methods included from Ftr::Default

#handle_idle, #handle_post_filtering

Instance Method Details

#handle_after_consume ⇒ Object

LRJ standard flow after consumption with potential filtering on success



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# File 'lib/karafka/pro/processing/strategies/lrj/ftr_mom.rb', line 52

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

      # Manual pausing has the highest priority
      return if coordinator.manual_pause?

      # If still not revoked and was throttled, we need to apply filtering logic
      if coordinator.filtered? && !revoked?
        handle_post_filtering

        # :seek and :pause are fully handled by handle_post_filtering
        # For :skip we still need to resume the LRJ MAX_PAUSE_TIME pause
        return unless coordinator.filter.action == :skip
      elsif !revoked? && !coordinator.manual_seek?
        # If not revoked and not throttled, we move to where we were suppose to and
        # resume
        seek(last_group_message.offset + 1, false, reset_offset: false)
      end

      resume
    else
      # If processing failed, we need to pause
      # For long running job this will overwrite the default never-ending pause and
      # will cause the processing to keep going after the error backoff
      retry_after_pause
    end
  end
end