# Copyright 2013 Hewlett-Packard Development Company, L.P.
# 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.
import abc
import six
@six.add_metaclass(abc.ABCMeta)
class ImageService(object):
"""Provides storage and retrieval of disk image objects within Glance."""
@abc.abstractmethod
def __init__(self):
"""Constructor."""
[docs] @abc.abstractmethod
def show(self, image_id):
"""Returns a dict with image data for the given opaque image id.
:param image_id: The opaque image identifier.
:returns: A dict containing image metadata.
:raises: ImageNotFound
"""
[docs] @abc.abstractmethod
def download(self, image_id, data=None):
"""Calls out to Glance for data and writes data.
:param image_id: The opaque image identifier.
:param data: (Optional) File object to write data to.
"""
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