#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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 abc
import six

__author__ = 'David M. Brown (davebshow@gmail.com)'


@six.add_metaclass(abc.ABCMeta)
class AbstractBaseTransport:

    @abc.abstractmethod
    def connect(self, url, headers=None):
        pass

    @abc.abstractmethod
    def write(self, message):
        pass

    @abc.abstractmethod
    def read(self):
        pass

    @abc.abstractmethod
    def close(self):
        pass

    @property
    @abc.abstractmethod
    def closed(self):
        pass
