Class: Concurrent::Actor::Utils::Broadcast

Inherits:

RestartingContext

• Object
• AbstractContext
• RestartingContext
• Concurrent::Actor::Utils::Broadcast

show all

Defined in:

lib/concurrent/actor/utils/broadcast.rb

Overview

news_channel = Concurrent::Actor::Utils::Broadcast.spawn :news

2.times do |i|
  Concurrent::Actor::Utils::AdHoc.spawn "listener-#{i}" do
    news_channel << :subscribe
    -> message { puts message }
  end
end

news_channel << 'Ruby rocks!'
# prints: 'Ruby rocks!' twice

Instance Attribute Summary (collapse)

• - (undocumented) core inherited from AbstractContext readonly

Instance Method Summary (collapse)

• - (undocumented) filtered_receivers

  override to define different behaviour, filtering etc.

• - (Broadcast) initialize constructor

  A new instance of Broadcast.

• - (undocumented) on_message(message)

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# File 'lib/concurrent/actor/utils/broadcast.rb', line 22

def initialize
  @receivers = Set.new
end

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# File 'lib/concurrent/actor/utils/broadcast.rb', line 45

def filtered_receivers
  @receivers
end

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# File 'lib/concurrent/actor/utils/broadcast.rb', line 26

def on_message(message)
  case message
  when :subscribe
    if envelope.sender.is_a? Reference
      @receivers.add envelope.sender
      true
    else
      false
    end
  when :unsubscribe
    !!@receivers.delete(envelope.sender)
  when :subscribed?
    @receivers.include? envelope.sender
  else
    filtered_receivers.each { |r| r << message }
  end
end