Class: Kafka::Transmission

Inherits:
Object
  • Object
show all
Defined in:
lib/kafka/transmission.rb

Instance Method Summary collapse

Constructor Details

#initialize(broker_pool:, buffer:, required_acks:, ack_timeout:, logger:) ⇒ Transmission

Returns a new instance of Transmission.



3
4
5
6
7
8
9
 
# File 'lib/kafka/transmission.rb', line 3

def initialize(broker_pool:, buffer:, required_acks:, ack_timeout:, logger:)
  @broker_pool = broker_pool
  @buffer = buffer
  @required_acks = required_acks
  @ack_timeout = ack_timeout
  @logger = logger
end

Instance Method Details

#send_messages ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/kafka/transmission.rb', line 11

def send_messages
  messages_for_broker = {}

  @buffer.each do |topic, partition, messages|
    broker_id = @broker_pool.get_leader_id(topic, partition)

    @logger.debug "Current leader for #{topic}/#{partition} is node #{broker_id}"

    messages_for_broker[broker_id] ||= MessageBuffer.new
    messages_for_broker[broker_id].concat(messages, topic: topic, partition: partition)
  end

  messages_for_broker.each do |broker_id, message_set|
    begin
      broker = @broker_pool.get_broker(broker_id)

      response = broker.produce(
        messages_for_topics: message_set.to_h,
        required_acks: @required_acks,
        timeout: @ack_timeout * 1000, # Kafka expects the timeout in milliseconds.
      )

      handle_response(response) if response
    rescue ConnectionError => e
      @logger.error "Could not connect to broker #{broker_id}: #{e}"

      # Mark the broker pool as stale in order to force a cluster metadata refresh.
      @broker_pool.mark_as_stale!
    end
  end
end