Module: Karafka::Pro::Routing::Features::Delaying::Topic

Defined in:
lib/karafka/pro/routing/features/delaying/topic.rb

Overview

Topic delaying API extensions

Instance Method Summary collapse

Instance Method Details

#delay_by ⇒ Object

Just an alias for nice API



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# File 'lib/karafka/pro/routing/features/delaying/topic.rb', line 63

def delay_by(*)
  delaying(*)
end

#delaying(delay = nil) ⇒ Object

Parameters:

  • delay (Integer, nil) (defaults to: nil) —

    minimum age of a message we want to process



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# File 'lib/karafka/pro/routing/features/delaying/topic.rb', line 48

def delaying(delay = nil)
  # Those settings are used for validation
  @delaying ||= begin
    config = Config.new(active: !delay.nil?, delay: delay)

    if config.active?
      factory = ->(*) { Pro::Processing::Filters::Delayer.new(delay) }
      filter(factory)
    end

    config
  end
end

#delaying? ⇒ Boolean

Returns is a given job delaying.

Returns:

  • (Boolean) —

    is a given job delaying



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# File 'lib/karafka/pro/routing/features/delaying/topic.rb', line 68

def delaying?
  delaying.active?
end

#initialize ⇒ Object

This method calls the parent class initializer and then sets up the extra instance variable to nil. The explicit initialization to nil is included as an optimization for Ruby’s object shapes system, which improves memory layout and access performance.



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# File 'lib/karafka/pro/routing/features/delaying/topic.rb', line 42

def initialize(...)
  super
  @delaying = nil
end

#to_h ⇒ Hash

Returns topic with all its native configuration options plus delaying.

Returns:

  • (Hash) —

    topic with all its native configuration options plus delaying



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# File 'lib/karafka/pro/routing/features/delaying/topic.rb', line 73

def to_h
  super.merge(
    delaying: delaying.to_h
  ).freeze
end