name : debug_logging.rb # Phusion Passenger - https://www.phusionpassenger.com/ # Copyright (c) 2010-2017 Phusion Holding B.V. # # "Passenger", "Phusion Passenger" and "Union Station" are registered # trademarks of Phusion Holding B.V. # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. PhusionPassenger.require_passenger_lib 'constants' module PhusionPassenger module DebugLogging # We don't refer to STDERR directly because STDERR's reference might # change during runtime. @@log_level = DEFAULT_LOG_LEVEL @@log_device = nil @@log_filename = nil @@stderr_evaluator = lambda { STDERR } def self.included(klass) klass.class_eval do private :debug private :trace end end def self.log_level return @@log_level end def self.log_level=(level) @@log_level = level end def self.log_file=(filename) if filename && filename.empty? @@log_filename = nil else @@log_filename = filename end @@log_device.close if @@log_device && !@@log_device.closed? @@log_device = nil end def self._log_device return @@log_device end def self.stderr_evaluator=(block) if block @@stderr_evaluator = block else @@stderr_evaluator = lambda { STDERR } end end def error(message) _output(1, message, 1) end module_function :error def warn(message) _output(2, message, 1) end module_function :warn def notice(message) _output(3, message, 1) end module_function :notice def info(message) _output(4, message, 1) end module_function :info def debug(message) _output(5, message, 1) end module_function :debug def trace(level, message) _output(4 + level, message, 1) end module_function :trace def _output(level, message, nesting_level = 0) if @@log_level >= level if @@log_filename if !@@log_device || @@log_device.closed? @@log_device = File.open(@@log_filename, "a") end output = @@log_device else output = @@stderr_evaluator.call end location = caller[nesting_level].sub(/.*phusion_passenger\//, '') location.sub!(/(.*?):.*/, '\1') now = Time.now time_str = now.strftime("%Y-%m-%d %H:%M:%S.") time_str << sprintf("%04d", now.usec / 100) current_thread = Thread.current if !(thread_id = current_thread[:id]) current_thread.to_s =~ /:(0x[0-9a-f]+)/i thread_id = current_thread[:id] = $1 || '?' end if thread_name = current_thread[:name] thread_name = "(#{thread_name})" end output.write("[ #{time_str} #{$$}/#{thread_id}#{thread_name} #{location} ]: #{message}\n") output.flush end end module_function :_output end end