Class: Karafka::Instrumentation::Callbacks::Error

Inherits:
Object
  • Object
show all
Defined in:
lib/karafka/instrumentation/callbacks/error.rb

Overview

Callback that kicks in when consumer error occurs and is published in a background thread

Instance Method Summary collapse

Constructor Details

#initialize(subscription_group_id, consumer_group_id, client_name, monitor) ⇒ Error

Returns a new instance of Error.

Parameters:

  • subscription_group_id (String) —

    id of the current subscription group instance

  • consumer_group_id (String) —

    id of the current consumer group

  • client_name (String) —

    rdkafka client name

  • monitor (WaterDrop::Instrumentation::Monitor) —

    monitor we are using



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# File 'lib/karafka/instrumentation/callbacks/error.rb', line 13

def initialize(subscription_group_id, consumer_group_id, client_name, monitor)
  @subscription_group_id = subscription_group_id
  @consumer_group_id = consumer_group_id
  @client_name = client_name
  @monitor = monitor
end

Instance Method Details

#call(client_name, error) ⇒ Object

Note:

It will only instrument on errors of the client of our consumer

Runs the instrumentation monitor with error

Parameters:

  • client_name (String) —

    rdkafka client name

  • error (Rdkafka::Error) —

    error that occurred



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# File 'lib/karafka/instrumentation/callbacks/error.rb', line 24

def call(client_name, error)
  # Emit only errors related to our client
  # Same as with statistics (mor explanation there)
  return unless @client_name == client_name

  @monitor.instrument(
    'error.occurred',
    subscription_group_id: @subscription_group_id,
    consumer_group_id: @consumer_group_id,
    type: 'librdkafka.error',
    error: error
  )
end