text: #!/usr/bin/python
  #
  # Copyright 2018 Google LLC
  #
  # 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.
  
  import logging
  from newrelic.agent import NewRelicContextFormatter
  
  import sys
  from pythonjsonlogger import jsonlogger
  
  # TODO(yoshifumi) this class is duplicated since other Python services are
  # not sharing the modules for logging.
  class CustomJsonFormatter(jsonlogger.JsonFormatter):
    def add_fields(self, log_record, record, message_dict):
      super(CustomJsonFormatter, self).add_fields(log_record, record, message_dict)
      if not log_record.get('timestamp'):
        log_record['timestamp'] = record.created
      if log_record.get('severity'):
        log_record['severity'] = log_record['severity'].upper()
      else:
        log_record['severity'] = record.levelname
  
  def getJSONLogger(name):
    logger = logging.getLogger(name)
    handler = logging.StreamHandler(sys.stdout)
    formatter = NewRelicContextFormatter()
    handler.setFormatter(formatter)
    logger.addHandler(handler)
  
    logger.setLevel(logging.INFO)
    logger.propagate = False
    return logger
  