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Diffstat (limited to 'ruby_2_2/lib/logger.rb')
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diff --git a/ruby_2_2/lib/logger.rb b/ruby_2_2/lib/logger.rb deleted file mode 100644 index 09c8943c94..0000000000 --- a/ruby_2_2/lib/logger.rb +++ /dev/null @@ -1,737 +0,0 @@ -# logger.rb - simple logging utility -# Copyright (C) 2000-2003, 2005, 2008, 2011 NAKAMURA, Hiroshi <nahi@ruby-lang.org>. -# -# Documentation:: NAKAMURA, Hiroshi and Gavin Sinclair -# License:: -# You can redistribute it and/or modify it under the same terms of Ruby's -# license; either the dual license version in 2003, or any later version. -# Revision:: $Id$ -# -# A simple system for logging messages. See Logger for more documentation. - -require 'monitor' - -# == Description -# -# The Logger class provides a simple but sophisticated logging utility that -# you can use to output messages. -# -# The messages have associated levels, such as +INFO+ or +ERROR+ that indicate -# their importance. You can then give the Logger a level, and only messages -# at that level or higher will be printed. -# -# The levels are: -# -# +UNKNOWN+:: An unknown message that should always be logged. -# +FATAL+:: An unhandleable error that results in a program crash. -# +ERROR+:: A handleable error condition. -# +WARN+:: A warning. -# +INFO+:: Generic (useful) information about system operation. -# +DEBUG+:: Low-level information for developers. -# -# For instance, in a production system, you may have your Logger set to -# +INFO+ or even +WARN+. -# When you are developing the system, however, you probably -# want to know about the program's internal state, and would set the Logger to -# +DEBUG+. -# -# *Note*: Logger does not escape or sanitize any messages passed to it. -# Developers should be aware of when potentially malicious data (user-input) -# is passed to Logger, and manually escape the untrusted data: -# -# logger.info("User-input: #{input.dump}") -# logger.info("User-input: %p" % input) -# -# You can use #formatter= for escaping all data. -# -# original_formatter = Logger::Formatter.new -# logger.formatter = proc { |severity, datetime, progname, msg| -# original_formatter.call(severity, datetime, progname, msg.dump) -# } -# logger.info(input) -# -# === Example -# -# This creates a Logger that outputs to the standard output stream, with a -# level of +WARN+: -# -# require 'logger' -# -# logger = Logger.new(STDOUT) -# logger.level = Logger::WARN -# -# logger.debug("Created logger") -# logger.info("Program started") -# logger.warn("Nothing to do!") -# -# path = "a_non_existent_file" -# -# begin -# File.foreach(path) do |line| -# unless line =~ /^(\w+) = (.*)$/ -# logger.error("Line in wrong format: #{line.chomp}") -# end -# end -# rescue => err -# logger.fatal("Caught exception; exiting") -# logger.fatal(err) -# end -# -# Because the Logger's level is set to +WARN+, only the warning, error, and -# fatal messages are recorded. The debug and info messages are silently -# discarded. -# -# === Features -# -# There are several interesting features that Logger provides, like -# auto-rolling of log files, setting the format of log messages, and -# specifying a program name in conjunction with the message. The next section -# shows you how to achieve these things. -# -# -# == HOWTOs -# -# === How to create a logger -# -# The options below give you various choices, in more or less increasing -# complexity. -# -# 1. Create a logger which logs messages to STDERR/STDOUT. -# -# logger = Logger.new(STDERR) -# logger = Logger.new(STDOUT) -# -# 2. Create a logger for the file which has the specified name. -# -# logger = Logger.new('logfile.log') -# -# 3. Create a logger for the specified file. -# -# file = File.open('foo.log', File::WRONLY | File::APPEND) -# # To create new (and to remove old) logfile, add File::CREAT like: -# # file = File.open('foo.log', File::WRONLY | File::APPEND | File::CREAT) -# logger = Logger.new(file) -# -# 4. Create a logger which ages the logfile once it reaches a certain size. -# Leave 10 "old" log files where each file is about 1,024,000 bytes. -# -# logger = Logger.new('foo.log', 10, 1024000) -# -# 5. Create a logger which ages the logfile daily/weekly/monthly. -# -# logger = Logger.new('foo.log', 'daily') -# logger = Logger.new('foo.log', 'weekly') -# logger = Logger.new('foo.log', 'monthly') -# -# === How to log a message -# -# Notice the different methods (+fatal+, +error+, +info+) being used to log -# messages of various levels? Other methods in this family are +warn+ and -# +debug+. +add+ is used below to log a message of an arbitrary (perhaps -# dynamic) level. -# -# 1. Message in a block. -# -# logger.fatal { "Argument 'foo' not given." } -# -# 2. Message as a string. -# -# logger.error "Argument #{@foo} mismatch." -# -# 3. With progname. -# -# logger.info('initialize') { "Initializing..." } -# -# 4. With severity. -# -# logger.add(Logger::FATAL) { 'Fatal error!' } -# -# The block form allows you to create potentially complex log messages, -# but to delay their evaluation until and unless the message is -# logged. For example, if we have the following: -# -# logger.debug { "This is a " + potentially + " expensive operation" } -# -# If the logger's level is +INFO+ or higher, no debug messages will be logged, -# and the entire block will not even be evaluated. Compare to this: -# -# logger.debug("This is a " + potentially + " expensive operation") -# -# Here, the string concatenation is done every time, even if the log -# level is not set to show the debug message. -# -# === How to close a logger -# -# logger.close -# -# === Setting severity threshold -# -# 1. Original interface. -# -# logger.sev_threshold = Logger::WARN -# -# 2. Log4r (somewhat) compatible interface. -# -# logger.level = Logger::INFO -# -# # DEBUG < INFO < WARN < ERROR < FATAL < UNKNOWN -# -# == Format -# -# Log messages are rendered in the output stream in a certain format by -# default. The default format and a sample are shown below: -# -# Log format: -# SeverityID, [DateTime #pid] SeverityLabel -- ProgName: message -# -# Log sample: -# I, [1999-03-03T02:34:24.895701 #19074] INFO -- Main: info. -# -# You may change the date and time format via #datetime_format=. -# -# logger.datetime_format = '%Y-%m-%d %H:%M:%S' -# # e.g. "2004-01-03 00:54:26" -# -# Or, you may change the overall format via the #formatter= method. -# -# logger.formatter = proc do |severity, datetime, progname, msg| -# "#{datetime}: #{msg}\n" -# end -# # e.g. "2005-09-22 08:51:08 +0900: hello world" -# -class Logger - VERSION = "1.2.7" - _, name, rev = %w$Id$ - if name - name = name.chomp(",v") - else - name = File.basename(__FILE__) - end - rev ||= "v#{VERSION}" - ProgName = "#{name}/#{rev}" - - class Error < RuntimeError # :nodoc: - end - # not used after 1.2.7. just for compat. - class ShiftingError < Error # :nodoc: - end - - # Logging severity. - module Severity - # Low-level information, mostly for developers. - DEBUG = 0 - # Generic (useful) information about system operation. - INFO = 1 - # A warning. - WARN = 2 - # A handleable error condition. - ERROR = 3 - # An unhandleable error that results in a program crash. - FATAL = 4 - # An unknown message that should always be logged. - UNKNOWN = 5 - end - include Severity - - # Logging severity threshold (e.g. <tt>Logger::INFO</tt>). - attr_accessor :level - - # Program name to include in log messages. - attr_accessor :progname - - # Set date-time format. - # - # +datetime_format+:: A string suitable for passing to +strftime+. - def datetime_format=(datetime_format) - @default_formatter.datetime_format = datetime_format - end - - # Returns the date format being used. See #datetime_format= - def datetime_format - @default_formatter.datetime_format - end - - # Logging formatter, as a +Proc+ that will take four arguments and - # return the formatted message. The arguments are: - # - # +severity+:: The Severity of the log message. - # +time+:: A Time instance representing when the message was logged. - # +progname+:: The #progname configured, or passed to the logger method. - # +msg+:: The _Object_ the user passed to the log message; not necessarily a - # String. - # - # The block should return an Object that can be written to the logging - # device via +write+. The default formatter is used when no formatter is - # set. - attr_accessor :formatter - - alias sev_threshold level - alias sev_threshold= level= - - # Returns +true+ iff the current severity level allows for the printing of - # +DEBUG+ messages. - def debug?; @level <= DEBUG; end - - # Returns +true+ iff the current severity level allows for the printing of - # +INFO+ messages. - def info?; @level <= INFO; end - - # Returns +true+ iff the current severity level allows for the printing of - # +WARN+ messages. - def warn?; @level <= WARN; end - - # Returns +true+ iff the current severity level allows for the printing of - # +ERROR+ messages. - def error?; @level <= ERROR; end - - # Returns +true+ iff the current severity level allows for the printing of - # +FATAL+ messages. - def fatal?; @level <= FATAL; end - - # - # :call-seq: - # Logger.new(logdev, shift_age = 7, shift_size = 1048576) - # Logger.new(logdev, shift_age = 'weekly') - # - # === Args - # - # +logdev+:: - # The log device. This is a filename (String) or IO object (typically - # +STDOUT+, +STDERR+, or an open file). - # +shift_age+:: - # Number of old log files to keep, *or* frequency of rotation (+daily+, - # +weekly+ or +monthly+). - # +shift_size+:: - # Maximum logfile size (only applies when +shift_age+ is a number). - # - # === Description - # - # Create an instance. - # - def initialize(logdev, shift_age = 0, shift_size = 1048576) - @progname = nil - @level = DEBUG - @default_formatter = Formatter.new - @formatter = nil - @logdev = nil - if logdev - @logdev = LogDevice.new(logdev, :shift_age => shift_age, - :shift_size => shift_size) - end - end - - # - # :call-seq: - # Logger#add(severity, message = nil, progname = nil) { ... } - # - # === Args - # - # +severity+:: - # Severity. Constants are defined in Logger namespace: +DEBUG+, +INFO+, - # +WARN+, +ERROR+, +FATAL+, or +UNKNOWN+. - # +message+:: - # The log message. A String or Exception. - # +progname+:: - # Program name string. Can be omitted. Treated as a message if no - # +message+ and +block+ are given. - # +block+:: - # Can be omitted. Called to get a message string if +message+ is nil. - # - # === Return - # - # When the given severity is not high enough (for this particular logger), - # log no message, and return +true+. - # - # === Description - # - # Log a message if the given severity is high enough. This is the generic - # logging method. Users will be more inclined to use #debug, #info, #warn, - # #error, and #fatal. - # - # <b>Message format</b>: +message+ can be any object, but it has to be - # converted to a String in order to log it. Generally, +inspect+ is used - # if the given object is not a String. - # A special case is an +Exception+ object, which will be printed in detail, - # including message, class, and backtrace. See #msg2str for the - # implementation if required. - # - # === Bugs - # - # * Logfile is not locked. - # * Append open does not need to lock file. - # * If the OS supports multi I/O, records possibly may be mixed. - # - def add(severity, message = nil, progname = nil) - severity ||= UNKNOWN - if @logdev.nil? or severity < @level - return true - end - progname ||= @progname - if message.nil? - if block_given? - message = yield - else - message = progname - progname = @progname - end - end - @logdev.write( - format_message(format_severity(severity), Time.now, progname, message)) - true - end - alias log add - - # - # Dump given message to the log device without any formatting. If no log - # device exists, return +nil+. - # - def <<(msg) - unless @logdev.nil? - @logdev.write(msg) - end - end - - # - # Log a +DEBUG+ message. - # - # See #info for more information. - # - def debug(progname = nil, &block) - add(DEBUG, nil, progname, &block) - end - - # - # :call-seq: - # info(message) - # info(progname, &block) - # - # Log an +INFO+ message. - # - # +message+:: The message to log; does not need to be a String. - # +progname+:: In the block form, this is the #progname to use in the - # log message. The default can be set with #progname=. - # +block+:: Evaluates to the message to log. This is not evaluated unless - # the logger's level is sufficient to log the message. This - # allows you to create potentially expensive logging messages that - # are only called when the logger is configured to show them. - # - # === Examples - # - # logger.info("MainApp") { "Received connection from #{ip}" } - # # ... - # logger.info "Waiting for input from user" - # # ... - # logger.info { "User typed #{input}" } - # - # You'll probably stick to the second form above, unless you want to provide a - # program name (which you can do with #progname= as well). - # - # === Return - # - # See #add. - # - def info(progname = nil, &block) - add(INFO, nil, progname, &block) - end - - # - # Log a +WARN+ message. - # - # See #info for more information. - # - def warn(progname = nil, &block) - add(WARN, nil, progname, &block) - end - - # - # Log an +ERROR+ message. - # - # See #info for more information. - # - def error(progname = nil, &block) - add(ERROR, nil, progname, &block) - end - - # - # Log a +FATAL+ message. - # - # See #info for more information. - # - def fatal(progname = nil, &block) - add(FATAL, nil, progname, &block) - end - - # - # Log an +UNKNOWN+ message. This will be printed no matter what the logger's - # level is. - # - # See #info for more information. - # - def unknown(progname = nil, &block) - add(UNKNOWN, nil, progname, &block) - end - - # - # Close the logging device. - # - def close - @logdev.close if @logdev - end - -private - - # Severity label for logging (max 5 chars). - SEV_LABEL = %w(DEBUG INFO WARN ERROR FATAL ANY) - - def format_severity(severity) - SEV_LABEL[severity] || 'ANY' - end - - def format_message(severity, datetime, progname, msg) - (@formatter || @default_formatter).call(severity, datetime, progname, msg) - end - - - # Default formatter for log messages. - class Formatter - Format = "%s, [%s#%d] %5s -- %s: %s\n" - - attr_accessor :datetime_format - - def initialize - @datetime_format = nil - end - - def call(severity, time, progname, msg) - Format % [severity[0..0], format_datetime(time), $$, severity, progname, - msg2str(msg)] - end - - private - - def format_datetime(time) - time.strftime(@datetime_format || "%Y-%m-%dT%H:%M:%S.%6N ".freeze) - end - - def msg2str(msg) - case msg - when ::String - msg - when ::Exception - "#{ msg.message } (#{ msg.class })\n" << - (msg.backtrace || []).join("\n") - else - msg.inspect - end - end - end - - module Period - module_function - - SiD = 24 * 60 * 60 - - def next_rotate_time(now, shift_age) - case shift_age - when /^daily$/ - t = Time.mktime(now.year, now.month, now.mday) + SiD - when /^weekly$/ - t = Time.mktime(now.year, now.month, now.mday) + SiD * (7 - now.wday) - when /^monthly$/ - t = Time.mktime(now.year, now.month, 1) + SiD * 32 - mday = 1 - else - return now - end - if mday or t.hour.nonzero? or t.min.nonzero? or t.sec.nonzero? - t = Time.mktime(t.year, t.month, mday || (t.mday + (t.hour > 12 ? 1 : 0))) - end - t - end - - def previous_period_end(now, shift_age) - case shift_age - when /^daily$/ - t = Time.mktime(now.year, now.month, now.mday) - SiD / 2 - when /^weekly$/ - t = Time.mktime(now.year, now.month, now.mday) - (SiD * (now.wday + 1) + SiD / 2) - when /^monthly$/ - t = Time.mktime(now.year, now.month, 1) - SiD / 2 - else - return now - end - Time.mktime(t.year, t.month, t.mday, 23, 59, 59) - end - end - - # Device used for logging messages. - class LogDevice - include Period - - attr_reader :dev - attr_reader :filename - - class LogDeviceMutex - include MonitorMixin - end - - def initialize(log = nil, opt = {}) - @dev = @filename = @shift_age = @shift_size = nil - @mutex = LogDeviceMutex.new - if log.respond_to?(:write) and log.respond_to?(:close) - @dev = log - else - @dev = open_logfile(log) - @dev.sync = true - @filename = log - @shift_age = opt[:shift_age] || 7 - @shift_size = opt[:shift_size] || 1048576 - @next_rotate_time = next_rotate_time(Time.now, @shift_age) unless @shift_age.is_a?(Integer) - end - end - - def write(message) - begin - @mutex.synchronize do - if @shift_age and @dev.respond_to?(:stat) - begin - check_shift_log - rescue - warn("log shifting failed. #{$!}") - end - end - begin - @dev.write(message) - rescue - warn("log writing failed. #{$!}") - end - end - rescue Exception => ignored - warn("log writing failed. #{ignored}") - end - end - - def close - begin - @mutex.synchronize do - @dev.close rescue nil - end - rescue Exception - @dev.close rescue nil - end - end - - private - - def open_logfile(filename) - begin - open(filename, (File::WRONLY | File::APPEND)) - rescue Errno::ENOENT - create_logfile(filename) - end - end - - def create_logfile(filename) - begin - logdev = open(filename, (File::WRONLY | File::APPEND | File::CREAT | File::EXCL)) - logdev.flock(File::LOCK_EX) - logdev.sync = true - add_log_header(logdev) - logdev.flock(File::LOCK_UN) - rescue Errno::EEXIST - # file is created by another process - logdev = open_logfile(filename) - logdev.sync = true - end - logdev - end - - def add_log_header(file) - file.write( - "# Logfile created on %s by %s\n" % [Time.now.to_s, Logger::ProgName] - ) if file.size == 0 - end - - def check_shift_log - if @shift_age.is_a?(Integer) - # Note: always returns false if '0'. - if @filename && (@shift_age > 0) && (@dev.stat.size > @shift_size) - lock_shift_log { shift_log_age } - end - else - now = Time.now - if now >= @next_rotate_time - @next_rotate_time = next_rotate_time(now, @shift_age) - lock_shift_log { shift_log_period(previous_period_end(now, @shift_age)) } - end - end - end - - if /mswin|mingw/ =~ RUBY_PLATFORM - def lock_shift_log - yield - end - else - def lock_shift_log - retry_limit = 8 - retry_sleep = 0.1 - begin - File.open(@filename, File::WRONLY | File::APPEND) do |lock| - lock.flock(File::LOCK_EX) # inter-process locking. will be unlocked at closing file - if File.identical?(@filename, lock) and File.identical?(lock, @dev) - yield # log shifting - else - # log shifted by another process (i-node before locking and i-node after locking are different) - @dev.close rescue nil - @dev = open_logfile(@filename) - @dev.sync = true - end - end - rescue Errno::ENOENT - # @filename file would not exist right after #rename and before #create_logfile - if retry_limit <= 0 - warn("log rotation inter-process lock failed. #{$!}") - else - sleep retry_sleep - retry_limit -= 1 - retry_sleep *= 2 - retry - end - end - rescue - warn("log rotation inter-process lock failed. #{$!}") - end - end - - def shift_log_age - (@shift_age-3).downto(0) do |i| - if FileTest.exist?("#{@filename}.#{i}") - File.rename("#{@filename}.#{i}", "#{@filename}.#{i+1}") - end - end - @dev.close rescue nil - File.rename("#{@filename}", "#{@filename}.0") - @dev = create_logfile(@filename) - return true - end - - def shift_log_period(period_end) - postfix = period_end.strftime("%Y%m%d") # YYYYMMDD - age_file = "#{@filename}.#{postfix}" - if FileTest.exist?(age_file) - # try to avoid filename crash caused by Timestamp change. - idx = 0 - # .99 can be overridden; avoid too much file search with 'loop do' - while idx < 100 - idx += 1 - age_file = "#{@filename}.#{postfix}.#{idx}" - break unless FileTest.exist?(age_file) - end - end - @dev.close rescue nil - File.rename("#{@filename}", age_file) - @dev = create_logfile(@filename) - return true - end - end -end |