Class: Kafka::Datadog::ProducerSubscriber

Inherits:

StatsdSubscriber

• Object
• ActiveSupport::Subscriber
• StatsdSubscriber
• Kafka::Datadog::ProducerSubscriber

Defined in:

lib/kafka/datadog.rb

Instance Method Summary

• #ack_message(event) ⇒ Object
• #buffer_overflow(event) ⇒ Object
• #deliver_messages(event) ⇒ Object
• #produce_message(event) ⇒ Object
• #topic_error(event) ⇒ Object

Instance Method Details

#ack_message(event) ⇒ Object

# File 'lib/kafka/datadog.rb', line 331

def ack_message(event)
  tags = {
    client: event.payload.fetch(:client_id),
    topic: event.payload.fetch(:topic),
  }

  # Number of messages ACK'd for the topic.
  increment("producer.ack.messages", tags: tags)

  # Histogram of delay between a message being produced and it being ACK'd.
  histogram("producer.ack.delay", event.payload.fetch(:delay), tags: tags)
end

#buffer_overflow(event) ⇒ Object

# File 'lib/kafka/datadog.rb', line 300

def buffer_overflow(event)
  tags = {
    client: event.payload.fetch(:client_id),
    topic: event.payload.fetch(:topic),
  }

  increment("producer.produce.errors", tags: tags)
end

#deliver_messages(event) ⇒ Object

# File 'lib/kafka/datadog.rb', line 309

def deliver_messages(event)
  client = event.payload.fetch(:client_id)
  message_count = event.payload.fetch(:delivered_message_count)
  attempts = event.payload.fetch(:attempts)

  tags = {
    client: client,
  }

  if event.payload.key?(:exception)
    increment("producer.deliver.errors", tags: tags)
  end

  timing("producer.deliver.latency", event.duration, tags: tags)

  # Messages delivered to Kafka:
  count("producer.deliver.messages", message_count, tags: tags)

  # Number of attempts to deliver messages:
  histogram("producer.deliver.attempts", attempts, tags: tags)
end

#produce_message(event) ⇒ Object

# File 'lib/kafka/datadog.rb', line 269

def produce_message(event)
  client = event.payload.fetch(:client_id)
  topic = event.payload.fetch(:topic)
  message_size = event.payload.fetch(:message_size)
  buffer_size = event.payload.fetch(:buffer_size)
  max_buffer_size = event.payload.fetch(:max_buffer_size)
  buffer_fill_ratio = buffer_size.to_f / max_buffer_size.to_f
  buffer_fill_percentage = buffer_fill_ratio * 100.0

  tags = {
    client: client,
    topic: topic,
  }

  # This gets us the write rate.
  increment("producer.produce.messages", tags: tags.merge(topic: topic))

  # Information about typical/average/95p message size.
  histogram("producer.produce.message_size", message_size, tags: tags.merge(topic: topic))

  # Aggregate message size.
  count("producer.produce.message_size.sum", message_size, tags: tags.merge(topic: topic))

  # This gets us the avg/max buffer size per producer.
  histogram("producer.buffer.size", buffer_size, tags: tags)

  # This gets us the avg/max buffer fill ratio per producer.
  histogram("producer.buffer.fill_ratio", buffer_fill_ratio, tags: tags)
  histogram("producer.buffer.fill_percentage", buffer_fill_percentage, tags: tags)
end

#topic_error(event) ⇒ Object

# File 'lib/kafka/datadog.rb', line 344

def topic_error(event)
  tags = {
    client: event.payload.fetch(:client_id),
    topic: event.payload.fetch(:topic)
  }

  increment("producer.ack.errors", tags: tags)
end