# File lib/core/container.rb, line 277 def initialize(io, handler, container) @io, @handler = io, handler @listener = Listener.new(io, container) env = ENV['PN_TRACE_EVT'] if env && ["true", "1", "yes", "on"].include?(env.downcase) @log_prefix = "[0x#{object_id.to_s(16)}](PN_LISTENER_" else @log_prefix = nil end dispatch(:on_open); end