text: # Copyright (c) 2018-2019 Micro Focus or one of its affiliates.
  # Copyright (c) 2018 Uber Technologies, Inc.
  #
  # 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.
  
  # Copyright (c) 2013-2017 Uber Technologies, Inc.
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  
  from __future__ import print_function, division, absolute_import
  
  import os, errno
  import logging
  
  class VerticaLogging(object):
  
      @classmethod
      def setup_file_logging(cls, logger_name, logfile, log_level=logging.INFO, context=''):
          logger = logging.getLogger(logger_name)
          formatter = logging.Formatter(
              fmt=('%(asctime)s.%(msecs)03d [%(module)s] '
                   '{}/%(process)d:0x%(thread)x <%(levelname)s> '
                   '%(message)s'.format(context)),
              datefmt='%Y-%m-%d %H:%M:%S')
          cls.ensure_dir_exists(logfile)
          file_handler = logging.FileHandler(logfile, encoding='utf-8')
          file_handler.setFormatter(formatter)
          logger.addHandler(file_handler)
          logger.setLevel(log_level)
  
      @classmethod
      def ensure_dir_exists(cls, filepath):
          """Ensure that a directory exists
  
          If it doesn't exist, try to create it and protect against a race condition
          if another process is doing the same.
          """
          directory = os.path.dirname(filepath)
          if directory != '' and not os.path.exists(directory):
              try:
                  os.makedirs(directory)
              except OSError as e:
                  if e.errno != errno.EEXIST:
                      raise
  