Class: Rdkafka::Callbacks::ListOffsetsHandler

Inherits:
BaseHandler
  • Object
show all
Defined in:
lib/rdkafka/callbacks/list_offsets_handler.rb

Overview

Handles RD_KAFKA_EVENT_LISTOFFSETS_RESULT events

Class Method Summary collapse

Class Method Details

.call(event_ptr) ⇒ void

This method returns an undefined value.

Resolves the list-offsets handle from its result event

Parameters:

  • event_ptr (FFI::Pointer) —

    pointer to the event



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# File 'lib/rdkafka/callbacks/list_offsets_handler.rb', line 12

def call(event_ptr)
  list_offsets = ListOffsetsResult.new(event_ptr)
  list_offsets_handle_ptr = Rdkafka::Bindings.rd_kafka_event_opaque(event_ptr)

  if list_offsets_handle = Rdkafka::Admin::ListOffsetsHandle.remove(list_offsets_handle_ptr.address)
    list_offsets_handle[:response] = list_offsets.result_error
    list_offsets_handle.broker_message = read_event_string(list_offsets.error_string)

    # Parsing can raise on per-partition errors. The exception is captured and re-raised
    # on the waiting thread, since an exception leaving this callback would unwind through
    # librdkafka native frames.
    list_offsets_handle.result = begin
      if list_offsets.result_error == Rdkafka::Bindings::RD_KAFKA_RESP_ERR_NO_ERROR
        Rdkafka::Admin::ListOffsetsReport.new(
          result_infos: list_offsets.result_infos,
          result_count: list_offsets.result_count
        )
      else
        Rdkafka::Admin::ListOffsetsReport.new(result_infos: FFI::Pointer::NULL, result_count: 0)
      end
    rescue => e
      e
    end

    list_offsets_handle.unlock
  end
end