Module: WaterDrop::Producer::Sync

Included in:
WaterDrop::Producer
Defined in:
lib/waterdrop/producer/sync.rb

Overview

Component for synchronous producer operations

Instance Method Summary collapse

Instance Method Details

#produce_many_sync(messages) ⇒ Array<Rdkafka::Producer::DeliveryReport>

Produces many messages to Kafka and waits for them to be delivered

Parameters:

  • messages (Array<Hash>) —

    array with messages that comply with the Contracts::Message contract

Returns:

  • (Array<Rdkafka::Producer::DeliveryReport>) —

    delivery reports

Raises:

  • (Rdkafka::RdkafkaError) —

    When adding the messages to rdkafka’s queue failed

  • (Rdkafka::Producer::WaitTimeoutError) —

    When the timeout has been reached and the some handles are still pending

  • (Errors::MessageInvalidError) —

    When any of the provided messages details are invalid and the message could not be sent to Kafka



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# File 'lib/waterdrop/producer/sync.rb', line 59

def produce_many_sync(messages)
  messages = middleware.run_many(messages)
  messages.each { |message| validate_message!(message) }

  dispatched = []

  @monitor.instrument('messages.produced_sync', producer_id: id, messages: messages) do
    with_transaction_if_transactional do
      messages.each do |message|
        dispatched << produce(message)
      end
    end

    dispatched.map! do |handler|
      wait(handler)
    end

    dispatched
  end
rescue *SUPPORTED_FLOW_ERRORS => e
  re_raised = Errors::ProduceManyError.new(dispatched, e.inspect)

  @monitor.instrument(
    'error.occurred',
    producer_id: id,
    messages: messages,
    dispatched: dispatched,
    error: re_raised,
    type: 'messages.produce_many_sync'
  )

  raise re_raised
end

#produce_sync(message) ⇒ Rdkafka::Producer::DeliveryReport

Produces a message to Kafka and waits for it to be delivered

Parameters:

Returns:

  • (Rdkafka::Producer::DeliveryReport) —

    delivery report

Raises:

  • (Rdkafka::RdkafkaError) —

    When adding the message to rdkafka’s queue failed

  • (Rdkafka::Producer::WaitTimeoutError) —

    When the timeout has been reached and the handle is still pending

  • (Errors::MessageInvalidError) —

    When provided message details are invalid and the message could not be sent to Kafka



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# File 'lib/waterdrop/producer/sync.rb', line 18

def produce_sync(message)
  message = middleware.run(message)
  validate_message!(message)

  @monitor.instrument(
    'message.produced_sync',
    producer_id: id,
    message: message
  ) do
    wait(produce(message))
  end
rescue *SUPPORTED_FLOW_ERRORS => e
  # We use this syntax here because we want to preserve the original `#cause` when we
  # instrument the error and there is no way to manually assign `#cause` value
  begin
    raise Errors::ProduceError, e.inspect
  rescue Errors::ProduceError => ex
    @monitor.instrument(
      'error.occurred',
      producer_id: id,
      message: message,
      error: ex,
      type: 'message.produce_sync'
    )

    raise ex
  end
end