Module: Karafka::Setup::DefaultsInjector

Defined in:
lib/karafka/setup/defaults_injector.rb

Overview

Injector that enriches each Kafka cluster with needed defaults. User may use more than one cluster and define them on a per-topic basis. We use this when we build the final config per subscription group.

Class Method Summary collapse

Class Method Details

.consumer(kafka_config) ⇒ Object

Propagates the kafka setting defaults unless they are already present for consumer config This makes it easier to set some values that users usually don’t change but still allows them to overwrite the whole hash if they want to

Parameters:

  • kafka_config (Hash) —

    kafka scoped config



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# File 'lib/karafka/setup/defaults_injector.rb', line 56

def consumer(kafka_config)
  CONSUMER_KAFKA_DEFAULTS.each do |key, value|
    next if kafka_config.key?(key)

    kafka_config[key] = value
  end

  return if Karafka::App.env.production?

  CONSUMER_KAFKA_DEV_DEFAULTS.each do |key, value|
    next if kafka_config.key?(key)

    kafka_config[key] = value
  end
end

.producer(kafka_config) ⇒ Object

Propagates the kafka settings defaults unless they are already present for producer config. This makes it easier to set some values that users usually don’t change but still allows them to overwrite the whole hash.

Parameters:

  • kafka_config (Hash) —

    kafka scoped config



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# File 'lib/karafka/setup/defaults_injector.rb', line 77

def producer(kafka_config)
  return if Karafka::App.env.production?

  PRODUCER_KAFKA_DEV_DEFAULTS.each do |key, value|
    next if kafka_config.key?(key)

    kafka_config[key] = value
  end
end