/usr/lib/ruby/vendor_ruby/active_support/notifications/fanout.rb is in ruby-activesupport-3.2 3.2.16-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | module ActiveSupport
module Notifications
# This is a default queue implementation that ships with Notifications.
# It just pushes events to all registered log subscribers.
class Fanout
def initialize
@subscribers = []
@listeners_for = {}
end
def subscribe(pattern = nil, block = Proc.new)
subscriber = Subscriber.new(pattern, block).tap do |s|
@subscribers << s
end
@listeners_for.clear
subscriber
end
def unsubscribe(subscriber)
@subscribers.reject! {|s| s.matches?(subscriber)}
@listeners_for.clear
end
def publish(name, *args)
listeners_for(name).each { |s| s.publish(name, *args) }
end
def listeners_for(name)
@listeners_for[name] ||= @subscribers.select { |s| s.subscribed_to?(name) }
end
def listening?(name)
listeners_for(name).any?
end
# This is a sync queue, so there is no waiting.
def wait
end
class Subscriber #:nodoc:
def initialize(pattern, delegate)
@pattern = pattern
@delegate = delegate
end
def publish(message, *args)
@delegate.call(message, *args)
end
def subscribed_to?(name)
!@pattern || @pattern === name.to_s
end
def matches?(subscriber_or_name)
self === subscriber_or_name ||
@pattern && @pattern === subscriber_or_name
end
end
end
end
end
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