This is a default queue implementation that ships with Notifications. It just pushes events to all registered log subscribers.

This class is thread safe. All methods are reentrant.

Methods

Included Modules

  • Mutex_m

Class Public methods

new()

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 15
def initialize
  @subscribers = []
  @listeners_for = Concurrent::Map.new
  super
end

Instance Public methods

finish(name, id, payload, listeners = listeners_for(name))

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 47
def finish(name, id, payload, listeners = listeners_for(name))
  listeners.each { |s| s.finish(name, id, payload) }
end

listeners_for(name)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 55
def listeners_for(name)
  # this is correctly done double-checked locking (Concurrent::Map's lookups have volatile semantics)
  @listeners_for[name] || synchronize do
    # use synchronisation when accessing @subscribers
    @listeners_for[name] ||= @subscribers.select { |s| s.subscribed_to?(name) }
  end
end

listening?(name)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 63
def listening?(name)
  listeners_for(name).any?
end

publish(name, *args)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 51
def publish(name, *args)
  listeners_for(name).each { |s| s.publish(name, *args) }
end

start(name, id, payload)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 43
def start(name, id, payload)
  listeners_for(name).each { |s| s.start(name, id, payload) }
end

subscribe(pattern = nil, callable = nil, &block)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 21
def subscribe(pattern = nil, callable = nil, &block)
  subscriber = Subscribers.new(pattern, callable || block)
  synchronize do
    @subscribers << subscriber
    @listeners_for.clear
  end
  subscriber
end

unsubscribe(subscriber_or_name)

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 30
def unsubscribe(subscriber_or_name)
  synchronize do
    case subscriber_or_name
    when String
      @subscribers.reject! { |s| s.matches?(subscriber_or_name) }
    else
      @subscribers.delete(subscriber_or_name)
    end

    @listeners_for.clear
  end
end

wait()

This is a sync queue, so there is no waiting.

Source: 

# File activesupport/lib/active_support/notifications/fanout.rb, line 68
def wait
end