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logger.py
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# -*- coding: utf-8 -*-
#
# (c) Copyright 2002-2008 Hewlett-Packard Development Company, L.P.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Authors: Doug Deprenger, Don Welch
#
# Std Lib
import sys
import thread # TODO: Use threading instead (thread deprecated in Python 3.0)
import syslog
import traceback
import string
import os
identity = string.maketrans('','')
unprintable = identity.translate(identity, string.printable)
def printable(s):
return s.translate(identity, unprintable)
DEFAULT_LOG_LEVEL = 'info'
class Logger(object):
LOG_LEVEL_NONE = 99
#LOG_LEVEL_INFO = 50
LOG_LEVEL_FATAL = 40
LOG_LEVEL_ERROR = 30
LOG_LEVEL_WARN = 20
LOG_LEVEL_INFO = 10
LOG_LEVEL_DEBUG3 = 3
LOG_LEVEL_DBG3 = 3
LOG_LEVEL_DEBUG2 = 2
LOG_LEVEL_DBG2 = 2
LOG_LEVEL_DEBUG = 1
LOG_LEVEL_DBG = 1
logging_levels = {'none' : LOG_LEVEL_NONE,
'fata' : LOG_LEVEL_FATAL,
'fatal' : LOG_LEVEL_FATAL,
'erro' : LOG_LEVEL_ERROR,
'error' : LOG_LEVEL_ERROR,
'warn' : LOG_LEVEL_WARN,
'info' : LOG_LEVEL_INFO,
'debug' : LOG_LEVEL_DEBUG,
'dbg' : LOG_LEVEL_DEBUG,
'debug2' : LOG_LEVEL_DEBUG2,
'dbg2' : LOG_LEVEL_DEBUG2,
'debug3' : LOG_LEVEL_DEBUG3,
'dbg3' : LOG_LEVEL_DEBUG3,
}
LOG_TO_DEV_NULL = 0
LOG_TO_CONSOLE = 1
LOG_TO_SCREEN = 1
LOG_TO_FILE = 2
LOG_TO_CONSOLE_AND_FILE = 3
LOG_TO_BOTH = 3
# Copied from Gentoo Portage output.py
# Copyright 1998-2003 Daniel Robbins, Gentoo Technologies, Inc.
# Distributed under the GNU Public License v2
codes={}
codes["reset"]="\x1b[0m"
codes["bold"]="\x1b[01m"
codes["teal"]="\x1b[36;06m"
codes["turquoise"]="\x1b[36;01m"
codes["fuscia"]="\x1b[35;01m"
codes["purple"]="\x1b[35;06m"
codes["blue"]="\x1b[34;01m"
codes["darkblue"]="\x1b[34;06m"
codes["green"]="\x1b[32;01m"
codes["darkgreen"]="\x1b[32;06m"
codes["yellow"]="\x1b[33;01m"
codes["brown"]="\x1b[33;06m"
codes["red"]="\x1b[31;01m"
codes["darkred"]="\x1b[31;06m"
def __init__(self, module='', level=LOG_LEVEL_INFO, where=LOG_TO_CONSOLE_AND_FILE,
log_datetime=False, log_file=None):
self._where = where
self._log_file = log_file
self._log_file_f = None
self._log_datetime = log_datetime
self._lock = thread.allocate_lock()
self.module = module
self.pid = os.getpid()
self.fmt = True
self.set_level(level)
def set_level(self, level):
if isinstance(level, str):
level = level.lower()
if level in Logger.logging_levels.keys():
self._level = Logger.logging_levels.get(level, Logger.LOG_LEVEL_INFO)
return True
else:
self.error("Invalid logging level: %s" % level)
return False
elif isinstance(level, int):
if Logger.LOG_LEVEL_DEBUG3 <= level <= Logger.LOG_LEVEL_FATAL:
self._level = level
else:
self._level = Logger.LOG_LEVEL_ERROR
self.error("Invalid logging level: %d" % level)
return False
else:
return False
def set_module(self, module):
self.module = module
self.pid = os.getpid()
def no_formatting(self):
self.fmt = False
def set_logfile(self, log_file):
self._log_file = log_file
try:
self._log_file_f = file(self._log_file, 'w')
except IOError:
self._log_file = None
self._log_file_f = None
self._where = Logger.LOG_TO_SCREEN
def get_logfile(self):
return self._log_file
def set_where(self, where):
self._where = where
def get_level(self):
return self._level
def is_debug(self):
return self._level <= Logger.LOG_LEVEL_DEBUG3
level = property(get_level, set_level)
def log(self, message, level):
if self._where in (Logger.LOG_TO_CONSOLE, Logger.LOG_TO_CONSOLE_AND_FILE):
try:
self._lock.acquire()
if level >= Logger.LOG_LEVEL_WARN:
out = sys.stderr
else:
out = sys.stdout
try:
out.write(message)
except UnicodeEncodeError:
out.write(message.encode("utf-8"))
out.write('\n')
finally:
self._lock.release()
def log_to_file(self, message):
if self._log_file_f is not None:
try:
self._lock.acquire()
self._log_file_f.write(message.replace('\x1b', ''))
self._log_file_f.write('\n')
finally:
self._lock.release()
def stderr(self, message):
try:
self._lock.acquire()
sys.stderr.write("%s: %s\n" % (self.module, message))
finally:
self._lock.release()
def debug(self, message):
if self._level <= Logger.LOG_LEVEL_DEBUG:
txt = "%s[%d]: debug: %s" % (self.module, self.pid, message)
self.log(self.color(txt, 'blue'), Logger.LOG_LEVEL_DEBUG)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
dbg = debug
def debug2(self, message):
if self._level <= Logger.LOG_LEVEL_DEBUG2:
txt = "%s[%d]: debug2: %s" % (self.module, self.pid, message)
self.log(self.color(txt, 'blue'), Logger.LOG_LEVEL_DEBUG2)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
dbg2 = debug2
def debug3(self, message):
if self._level <= Logger.LOG_LEVEL_DEBUG3:
txt = "%s[%d]: debug3: %s" % (self.module, self.pid, message)
self.log(self.color(txt, 'blue'), Logger.LOG_LEVEL_DEBUG3)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
dbg3 = debug3
def debug_block(self, title, block):
if self._level <= Logger.LOG_LEVEL_DEBUG:
line = "%s[%d]: debug: %s:" % (self.module, self.pid, title)
self.log(self.color(line, 'blue'), Logger.LOG_LEVEL_DEBUG)
self.log(self.color(block, 'blue'), Logger.LOG_LEVEL_DEBUG)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(line % (self.module, self.pid, title))
self.log_to_file(block)
printable = """ !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ """
def log_data(self, data, width=16):
if self._level <= Logger.LOG_LEVEL_DEBUG:
if data:
index, line = 0, data[0:width]
while line:
txt = ' '.join(['%04x: ' % index, ' '.join(['%02x' % ord(d) for d in line]),
' '*(width*3-3*len(line)), ''.join([('.', i)[i in Logger.printable] for i in line])])
self.log(self.color("%s[%d]: debug: %s" % (self.module, self.pid, txt), 'blue'),
Logger.LOG_LEVEL_DEBUG)
index += width
line = data[index:index+width]
else:
self.log(self.color("%s[%d]: debug: %s" % (self.module, self.pid, "0000: (no data)"), 'blue'),
Logger.LOG_LEVEL_DEBUG)
def info(self, message=''):
if self._level <= Logger.LOG_LEVEL_INFO:
self.log(message, Logger.LOG_LEVEL_INFO)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file("%s[%d]: info: :%s" % (self.module, self.pid, message))
information = info
def warn(self, message):
if self._level <= Logger.LOG_LEVEL_WARN:
txt = "warning: %s" % message.encode('utf-8')
self.log(self.color(txt, 'fuscia'), Logger.LOG_LEVEL_WARN)
syslog.syslog(syslog.LOG_WARNING, "%s[%d]: %s" % (self.module, self.pid, txt))
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
warning = warn
def note(self, message):
if self._level <= Logger.LOG_LEVEL_WARN:
txt = "note: %s" % message
self.log(self.color(txt, 'green'), Logger.LOG_LEVEL_WARN)
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
notice = note
def error(self, message):
if self._level <= Logger.LOG_LEVEL_ERROR:
txt = "error: %s" % message.encode("utf-8")
self.log(self.color(txt, 'red'), Logger.LOG_LEVEL_ERROR)
syslog.syslog(syslog.LOG_ALERT, "%s[%d]: %s" % (self.module, self.pid, txt))
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
def fatal(self, message):
if self._level <= Logger.LOG_LEVEL_FATAL:
txt = "fatal error: :%s" % self.module.encode('utf-8')
self.log(self.color(txt, 'red'), Logger.LOG_LEVEL_DEBUG)
syslog.syslog(syslog.LOG_ALERT, "%s[%d]: %s" % (self.module, self.pid, txt))
if self._log_file is not None and \
self._where in (Logger.LOG_TO_FILE, Logger.LOG_TO_CONSOLE_AND_FILE):
self.log_to_file(txt)
def exception(self):
typ, value, tb = sys.exc_info()
body = "Traceback (innermost last):\n"
lst = traceback.format_tb(tb) + traceback.format_exception_only(typ, value)
body = body + "%-20s %s" % (''.join(lst[:-1]), lst[-1],)
self.fatal(body)
def color(self, text, color):
if self.fmt:
return ''.join([Logger.codes.get(color, 'bold'), text, Logger.codes['reset']])
return text
def bold(self, text):
return self.color(text, 'bold')
def red(self, text):
return self.color(text, 'red')
def green(self, text):
return self.color(text, 'green')
def purple(self, text):
return self.color(text, 'purple')
def yellow(self, text):
return self.color(text, 'yellow')
def darkgreen(self, text):
return self.color(text, 'darkgreen')
def blue(self, text):
return self.color(text, 'blue')