ruby_celluloid_example_4.rb

class SyncProxy < AbstractProxy
  def method_missing(meth, *args, &block)
  # ... snip
    call = ::Celluloid::Call::Sync.new(::Celluloid.mailbox, meth, args, block)
    @mailbox << call
    call.value
  end
end

# Async method interception
class AsyncProxy < AbstractProxy
  def method_missing(meth, *args, &block)
    # ... snip
    @mailbox << ::Celluloid::Call::Async.new(meth, args, block)
    self
  end
end