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require "set"
require "timers"
module Celluloid
module Internals
# Allow methods to directly interact with the actor protocol
class Receivers
def initialize(timers)
@receivers = Set.new
@timers = timers
end
# Receive an asynchronous message
def receive(timeout = nil, &block)
if Celluloid.exclusive?
Celluloid.mailbox.receive(timeout, &block)
else
receiver = Receiver.new block
if timeout
receiver.timer = @timers.after(timeout) do
@receivers.delete receiver
receiver.resume
end
end
@receivers << receiver
Task.suspend :receiving
end
end
# Handle incoming messages
def handle_message(message)
receiver = @receivers.find { |r| r.match(message) }
return unless receiver
@receivers.delete receiver
receiver.timer.cancel if receiver.timer
receiver.resume message
message
end
end
# Methods blocking on a call to receive
class Receiver
attr_accessor :timer
def initialize(block)
@block = block
@task = Task.current
@timer = nil
end
# Match a message with this receiver's block
def match(message)
@block ? @block.call(message) : true
end
def resume(message = nil)
@task.resume message
end
end
end
end
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