text: # 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.
  
  from pifpaf import drivers
  
  
  class MemcachedDriver(drivers.Driver):
  
      DEFAULT_PORT = 11212
  
      def __init__(self, port=DEFAULT_PORT, **kwargs):
          """Create a new memcached server."""
          super(MemcachedDriver, self).__init__(**kwargs)
          self.port = port
  
      @classmethod
      def get_options(cls):
          return [
              {"param_decls": ["--port"],
               "type": int,
               "default": cls.DEFAULT_PORT,
               "help": "port to use for memcached"},
          ]
  
      def _setUp(self):
          super(MemcachedDriver, self)._setUp()
  
          c, _ = self._exec(["memcached",
                             "-p " + str(self.port)],
                            wait_for_port=self.port)
  
          self.putenv("MEMCACHED_PORT", str(self.port))
          self.putenv("URL", "memcached://localhost:%d" % self.port)
  