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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of Pioneers of the Inevitable, Songbird, nor the names
# of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
import logging
import sys
from logging.handlers import RotatingFileHandler
try:
LOG_FILENAME = os.path.splitext(__file__)[0] + ".log"
except:
LOG_FILENAME = __file__ + ".log"
class Singleton(object):
"""
Singleton interface:
http://www.python.org/download/releases/2.2.3/descrintro/#__new__
"""
def __new__(cls, *args, **kwds):
it = cls.__dict__.get("__it__")
if it is not None:
return it
cls.__it__ = it = object.__new__(cls)
it.init(*args, **kwds)
return it
def init(self, *args, **kwds):
pass
class LoggerManager(Singleton):
"""
Logger Manager.
Handles all logging files.
"""
def init(self, loggername):
self.logger = logging.getLogger(loggername)
rhandler = None
try:
rhandler = RotatingFileHandler(
LOG_FILENAME,
mode='a',
maxBytes = 10 * 1024 * 1024,
backupCount=5
)
except:
raise IOError("Couldn't create/open file \"" + \
LOG_FILENAME + "\". Check permissions.")
self.logger.setLevel(logging.DEBUG)
formatter = logging.Formatter(
fmt = '[%(asctime)s] [%(filename)s:%(lineno)d] [%(levelname)-8s] %(message)s',
datefmt = '%F %H:%M:%S'
)
rhandler.setFormatter(formatter)
self.logger.addHandler(rhandler)
def debug(self, loggername, msg):
self.logger = logging.getLogger(loggername)
self.logger.debug(msg)
def error(self, loggername, msg):
self.logger = logging.getLogger(loggername)
self.logger.error(msg)
def info(self, loggername, msg):
self.logger = logging.getLogger(loggername)
self.logger.info(msg)
def warning(self, loggername, msg):
self.logger = logging.getLogger(loggername)
self.logger.warning(msg)
class Logger(object):
"""
Logger object.
"""
def __init__(self, loggername="root"):
self.lm = LoggerManager(loggername) # LoggerManager instance
self.loggername = loggername # logger name
def debug(self, msg):
self.lm.debug(self.loggername, msg)
def error(self, msg):
self.lm.error(self.loggername, msg)
def info(self, msg):
self.lm.info(self.loggername, msg)
def warning(self, msg):
self.lm.warning(self.loggername, msg)
if __name__ == '__main__':
logger = Logger()
logger.debug("this testname.")