108 lines
3.1 KiB
Python
108 lines
3.1 KiB
Python
# Copyright 2014 Modelling, Simulation and Design Lab (MSDL) at
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# McGill University and the University of Antwerp (http://msdl.cs.mcgill.ca/)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Logger for Syslog
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"""
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logger = None
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location = None
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queue = []
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import threading
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loglock = threading.Lock()
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def setLogger(loc, address, loglevel):
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"""
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Sets the logger object
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:param loc: location of the server, to prepend to every logged message
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:param address: the address of the syslog server in the form of (ip-address, port)
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:param loglevel: the level of logging to perform, should be one specified in the logging module
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"""
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if loglevel is None:
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return
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global logger
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if logger is not None:
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# A logger is already set, so ignore this one
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return
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import logging
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import logging.handlers
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handler = logging.handlers.SysLogHandler(address, facility=19)
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local_logger = logging.getLogger('PyPDEVS-logging')
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local_logger.addHandler(handler)
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local_logger.setLevel(loglevel)
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global location
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location = loc
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# Now make the logger 'public'
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logger = local_logger
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def log(level, msg, logger):
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"""
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Do the actual logging at the specified level, but save it in case no logger exists yet
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:param level: string representation of the function to call on the logger
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:param msg: the message to log
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:returns: True -- to allow it as an #assert statement
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"""
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with loglock:
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global location
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global queue
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if len(msg) > 80:
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msg = msg[:79]
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if logger is not None:
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# Flush the queue first
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for level1, msg1 in queue:
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getattr(logger, level1)("%s -- %s" % (location, msg1))
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queue = []
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getattr(logger, level)("%s -- %s" % (location, msg))
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else:
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queue.append((level, msg))
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return True
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def debug(msg):
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"""
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Debug logging statement
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:param msg: the message to print
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:returns: True -- to allow it as an #assert statement
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"""
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return log("debug", msg, logger)
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def info(msg):
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"""
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Informational logging statement
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:param msg: the message to print
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:returns: True -- to allow it as an #assert statement
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"""
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return log("info", msg, logger)
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def warn(msg):
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"""
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Warning logging statement
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:param msg: the message to print
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:returns: True -- to allow it as an #assert statement
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"""
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return log("warn", msg, logger)
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def error(msg):
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"""
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Error logging statement
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:param msg: the message to print
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:returns: True -- to allow it as an #assert statement
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"""
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return log("error", msg, logger)
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