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import Topolog
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| # | ||
| # topolog.py | ||
| # Library of helper functions for NetDEF Topology Tests | ||
| # | ||
| # Copyright (c) 2017 by | ||
| # Network Device Education Foundation, Inc. ("NetDEF") | ||
| # | ||
| # Permission to use, copy, modify, and/or distribute this software | ||
| # for any purpose with or without fee is hereby granted, provided | ||
| # that the above copyright notice and this permission notice appear | ||
| # in all copies. | ||
| # | ||
| # THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES | ||
| # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
| # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR | ||
| # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY | ||
| # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | ||
| # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | ||
| # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | ||
| # OF THIS SOFTWARE. | ||
| # | ||
|
|
||
| """ | ||
| Logging utilities for topology tests. | ||
| This file defines our logging abstraction. | ||
| """ | ||
|
|
||
| import sys | ||
| import logging | ||
|
|
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| # Helper dictionary to convert Topogen logging levels to Python's logging. | ||
| DEBUG_TOPO2LOGGING = { | ||
| 'debug': logging.DEBUG, | ||
| 'info': logging.INFO, | ||
| 'output': logging.INFO, | ||
| 'warning': logging.WARNING, | ||
| 'error': logging.ERROR, | ||
| 'critical': logging.CRITICAL, | ||
| } | ||
|
|
||
| # | ||
| # Logger class definition | ||
| # | ||
|
|
||
| class Logger(object): | ||
| """ | ||
| Logger class that encapsulates logging functions, internaly it uses Python | ||
| logging module with a separated instance instead of global. | ||
| Default logging level is 'info'. | ||
| """ | ||
|
|
||
| def __init__(self): | ||
| # Create default global logger | ||
| self.log_level = logging.INFO | ||
| self.logger = logging.Logger('topolog', level=self.log_level) | ||
| handler = logging.StreamHandler() | ||
| handler.setFormatter( | ||
| logging.Formatter(fmt='%(asctime)s %(levelname)s: %(message)s') | ||
| ) | ||
| self.logger.addHandler(handler) | ||
|
|
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| # Handle more loggers | ||
| self.loggers = {'topolog': self.logger} | ||
|
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| def set_log_level(self, level): | ||
| "Set the logging level" | ||
| self.log_level = DEBUG_TOPO2LOGGING.get(level) | ||
| self.logger.setLevel(self.log_level) | ||
|
|
||
| def get_logger(self, name='topolog', log_level=None, target=sys.stdout): | ||
| """ | ||
| Get a new logger entry. Allows creating different loggers for formating, | ||
| filtering or handling (file, stream or stdout/stderr). | ||
| """ | ||
| if log_level is None: | ||
| log_level = self.log_level | ||
| if self.loggers.has_key(name): | ||
| return self.loggers[name] | ||
|
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| nlogger = logging.Logger(name, level=log_level) | ||
| if isinstance(target, str): | ||
| handler = logging.FileHandler(filename=target) | ||
| else: | ||
| handler = logging.StreamHandler(stream=target) | ||
|
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||
| handler.setFormatter( | ||
| logging.Formatter(fmt='%(asctime)s %(levelname)s: %(message)s') | ||
| ) | ||
| nlogger.addHandler(handler) | ||
| self.loggers[name] = nlogger | ||
| return nlogger | ||
|
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| # | ||
| # Global variables | ||
| # | ||
|
|
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| logger_config = Logger() | ||
| logger = logger_config.logger |
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