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#!/usr/bin/python
# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A library for logging text to SysLog and the serial console."""
from google_compute_engine import constants
from google_compute_engine.compat import logging
def Logger(name, debug=False, facility=None):
"""Get a logging object with handlers for sending logs to SysLog.
Args:
name: string, the name of the logger which will be added to log entries.
debug: bool, True if debug output should write to the console.
facility: int, an encoding of the SysLog handler's facility and priority.
Returns:
logging object, an object for logging entries.
"""
logger = logging.getLogger(name)
logger.handlers = []
logger.addHandler(logging.NullHandler())
logger.propagate = False
logger.setLevel(logging.DEBUG)
formatter = logging.Formatter(name + ': %(levelname)s %(message)s')
if debug:
# Create a handler for console logging.
console_handler = logging.StreamHandler()
console_handler.setLevel(logging.DEBUG)
console_handler.setFormatter(formatter)
logger.addHandler(console_handler)
if facility:
# Create a handler for sending logs to SysLog.
syslog_handler = logging.handlers.SysLogHandler(
address=constants.SYSLOG_SOCKET, facility=facility)
syslog_handler.setLevel(logging.INFO)
syslog_handler.setFormatter(formatter)
logger.addHandler(syslog_handler)
return logger
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