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# Copyright (C) 2010 Leonard Thomas
#
# This file is part of Dodai.
#
# Dodai 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 3 of the License, or
# (at your option) any later version.
#
# Dodai 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 Dodai. If not, see <http://www.gnu.org/licenses/>.
import logging
import logging.handlers
import os
class ConfigLog(object):
LEVELS = {
logging.CRITICAL: [
'critical',
"%(asctime)s - %(name)s - %(levelname)s - %(message)s",
"%(message)s"],
logging.ERROR: [
'error',
"%(asctime)s - %(name)s - %(levelname)s - %(message)s",
"%(message)s"],
logging.WARNING: [
'warning',
"%(asctime)s - %(name)s - %(levelname)s - %(message)s",
"%(message)s"],
logging.INFO: [
'info',
"%(asctime)s - %(name)s - %(levelname)s - %(message)s",
"%(message)s"],
logging.DEBUG: [
'debug',
"%(asctime)s - %(name)s - %(levelname)s - %(message)s",
"%(message)s"]
}
MAX_BYTES = 10485760
BACKUP_COUNT = 5
FILE_FORMAT = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
STDOUT_FORMAT = "%(message)s"
def __init__(self):
self.log_level = logging.CRITICAL
self.directory = None
self._levels = {}
def set_log_level(self, level):
try:
level = self._fetch_log_level(level)
except InvalidLevelException:
pass
else:
self.log_level = level
def set_directory(self, directory):
if os.path.isdir(directory):
self.directory = directory
else:
raise NoDirectoryExistException(directory)
def get_file_message_format(self, level):
if not self._levels:
self._levels = self.LEVELS
level = self._fetch_log_level(level)
return self._levels[level][1]
def get_screen_message_format(self, level):
if not self._levels:
self._levels = self.LEVELS
level = self._fetch_log_level(level)
return self._levels[level][2]
def _fetch_log_level(self, level):
out = None
if isinstance(level, str):
level = level.strip().lower()
if level in self.LEVELS:
out = level
else:
for key, items in self.LEVELS.items():
if level == items[0]:
out = key
if not out:
raise InvalidLevelException(level)
else:
return out
def _build_filepath(self, data):
data = os.path.normpath(data)
if data.startswith(os.path.sep):
dir = os.path.dirname(data)
if not os.path.isdir(dir):
raise NoDirectoryExistException(dir)
else:
if not self.directory:
raise DirectoryNotSetException()
else:
data = os.path.join(self.directory, data)
return data
def load(self, name):
log =logging.getLogger(name)
log.setLevel(self.log_level)
return log
def attach_file_handler(self, log, filename):
filepath = self._build_filepath(filename)
handler = logging.handlers.RotatingFileHandler(
filepath, maxBytes = self.MAX_BYTES,
backupCount=self.BACKUP_COUNT)
file_format = self.get_file_message_format(self.log_level)
format_obj = logging.Formatter(file_format)
handler.setFormatter(format_obj)
handler.setLevel(self.log_level)
log.addHandler(handler)
def attach_screen_handler(self, log, level=None):
if level:
level = self._fetch_log_level(level)
else:
level = self.log_level
message_format = self.get_screen_message_format(level)
handler = logging.StreamHandler()
handler.setLevel(level)
format_obj = logging.Formatter(message_format)
handler.setFormatter(format_obj)
log.addHandler(handler)
class NoDirectoryExistException(Exception):
pass
class DirectoryNotSetException(Exception):
pass
class InvalidLevelException(Exception):
pass
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