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  # Copyright 2010 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  #
  #    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.
  
  """
  Datastore:
  
  MAKE Sure that ReDIS is running, and your flags are set properly,
  before trying to run this.
  """
  
  import logging
  import redis
  
  from nova import flags
  
  FLAGS = flags.FLAGS
  flags.DEFINE_string('redis_host', '127.0.0.1',
                      'Host that redis is running on.')
  flags.DEFINE_integer('redis_port', 6379,
                      'Port that redis is running on.')
  flags.DEFINE_integer('redis_db', 0, 'Multiple DB keeps tests away')
  
  
  class Redis(object):
      def __init__(self):
          if hasattr(self.__class__, '_instance'):
              raise Exception('Attempted to instantiate singleton')
  
      @classmethod
      def instance(cls):
          if not hasattr(cls, '_instance'):
              inst = redis.Redis(host=FLAGS.redis_host,
                                 port=FLAGS.redis_port,
                                 db=FLAGS.redis_db)
              cls._instance = inst
          return cls._instance
  
  
  
subject: make the fake-ldap system work again