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+# Copyright (c) 2017 Cisco and/or its affiliates.
+# 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.
+
+"""Implementation of exceptions used in the Presentation and analytics layer.
+"""
+
+import sys
+import logging
+
+
+class PresentationError(Exception):
+ """Exception(s) raised by the presentation module.
+
+ When raising this exception, put this information to the message in this
+ order:
+ - short description of the encountered problem (parameter msg),
+ - relevant messages if there are any collected, e.g., from caught
+ exception (optional parameter details),
+ - relevant data if there are any collected (optional parameter details).
+ """
+
+ log_exception = {"DEBUG": logging.debug,
+ "INFO": logging.info,
+ "WARNING": logging.warning,
+ "ERROR": logging.error,
+ "CRITICAL": logging.critical}
+
+ def __init__(self, msg, details='', level="CRITICAL"):
+ """Sets the exception message and the level.
+
+ :param msg: Short description of the encountered problem.
+ :param details: Relevant messages if there are any collected, e.g.,
+ from caught exception (optional parameter details), or relevant data if
+ there are any collected (optional parameter details).
+ :param level: Level of the error, possible choices are: "DEBUG", "INFO",
+ "WARNING", "ERROR" and "CRITICAL".
+ :type msg: str
+ :type details: str
+ :type level: str
+ """
+
+ super(PresentationError, self).__init__()
+ self._msg = msg
+ self._details = details
+ self._level = level
+
+ try:
+ self.log_exception[self._level](self._msg)
+ if self._details:
+ self.log_exception[self._level](self._details)
+ except KeyError:
+ print("Wrong log level.")
+ sys.exit(1)
+
+ def __repr__(self):
+ return (
+ "PresentationError(msg={msg!r},details={dets!r},level={level!r})".
+ format(msg=self._msg, dets=self._details, level=self._level))
+
+ def __str__(self):
+ return str(self._msg)
+
+ @property
+ def level(self):
+ """Getter - logging level.
+
+ :returns: Logging level.
+ :rtype: str
+ """
+ return self._level