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# encoding: UTF-8
#-- vim:sw=2:et
#++
#
# :title: rbot logger
require 'logger'
require 'thread'
require 'singleton'
module Irc
class Bot
class LoggerManager
include Singleton
def enable_console_logger
@console_logger = Logger.new(STDERR)
@console_logger.datetime_format = @dateformat
@console_logger.level = Logger::Severity::DEBUG
end
def disable_console_logger
@console_logger.close if @console_logger
@console_logger = nil
end
def initialize
@dateformat = "%Y/%m/%d %H:%M:%S"
enable_console_logger
@file_logger = nil
@queue = Queue.new
start_thread
end
def set_logfile(filename, keep, max_size)
# close previous file logger if present
@file_logger.close if @file_logger
@file_logger = Logger.new(filename, keep, max_size*1024*1024)
@file_logger.datetime_format = @dateformat
@file_logger.level = @console_logger.level
# make sure the thread is running, which might be false after a fork
# (conveniently, we call set_logfile right after the fork)
start_thread
end
def set_level(level)
@console_logger.level = level if @console_logger
@file_logger.level = level if @file_logger
end
def sync_log(severity, message = nil, progname = nil)
@console_logger.add(severity, message, progname) if @console_logger
@file_logger.add(severity, message, progname) if @file_logger
end
def async_log(severity, message=nil, who_pos=1)
unless @thread
STDERR.puts('logger thread already destroyed, cannot log message!')
end
call_stack = caller
if call_stack.length > who_pos
who = call_stack[who_pos].sub(%r{(?:.+)/([^/]+):(\d+)(:in .*)?}) { "#{$1}:#{$2}#{$3}" }
else
who = "(unknown)"
end
# Output each line. To distinguish between separate messages and multi-line
# messages originating at the same time, we blank #{who} after the first message
# is output.
# Also, we output strings as-is but for other objects we use pretty_inspect
message = message.kind_of?(String) ? message : (message.pretty_inspect rescue '?')
qmsg = Array.new
message.each_line { |l|
qmsg.push [severity, l.chomp, who]
who = ' ' * who.size
}
@queue.push qmsg
end
def log_session_start
if @file_logger
@file_logger << "\n\n=== session started on #{Time.now.strftime(@dateformat)} ===\n\n"
end
end
def log_session_end
if @file_logger
@file_logger << "\n\n=== session ended on #{Time.now.strftime(@dateformat)} ===\n\n"
end
end
def halt_logger
if @thread and @thread.alive?
@queue << nil
@thread.join
@thread = nil
log_session_end
end
end
def flush
while @queue.size > 0
next
end
end
private
def start_thread
return if @thread and @thread.alive?
@thread = Thread.new do
lines = nil
while lines = @queue.pop
lines.each { |line|
sync_log(*line)
}
end
end
end
end
end
end
def debug(message=nil, who_pos=1)
Irc::Bot::LoggerManager.instance.async_log(Logger::Severity::DEBUG, message, who_pos)
end
def log(message=nil, who_pos=1)
Irc::Bot::LoggerManager.instance.async_log(Logger::Severity::INFO, message, who_pos)
end
def warning(message=nil, who_pos=1)
Irc::Bot::LoggerManager.instance.async_log(Logger::Severity::WARN, message, who_pos)
end
def error(message=nil, who_pos=1)
Irc::Bot::LoggerManager.instance.async_log(Logger::Severity::ERROR, message, who_pos)
end
def fatal(message=nil, who_pos=1)
Irc::Bot::LoggerManager.instance.async_log(Logger::Severity::FATAL, message, who_pos)
end
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