132 lines
4.9 KiB
Python
132 lines
4.9 KiB
Python
# Copyright 2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""The Volume Image Metadata API extension."""
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import logging
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from cinder.api import extensions
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from cinder.api.openstack import wsgi
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from cinder.api import xmlutil
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from cinder import volume
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LOG = logging.getLogger(__name__)
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authorize = extensions.soft_extension_authorizer('volume',
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'volume_image_metadata')
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class VolumeImageMetadataController(wsgi.Controller):
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def __init__(self, *args, **kwargs):
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super(VolumeImageMetadataController, self).__init__(*args, **kwargs)
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self.volume_api = volume.API()
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def _get_all_images_metadata(self, context):
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"""Returns the image metadata for all volumes."""
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try:
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all_metadata = self.volume_api.get_volumes_image_metadata(context)
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except Exception as e:
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LOG.debug('Problem retrieving volume image metadata. '
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'It will be skipped. Error: %s', e)
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all_metadata = {}
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return all_metadata
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def _add_image_metadata(self, context, resp_volume, image_meta=None):
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"""Appends the image metadata to the given volume.
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:param context: the request context
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:param resp_volume: the response volume
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:param image_meta: The image metadata to append, if None is provided it
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will be retrieved from the database. An empty dict
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means there is no metadata and it should not be
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retrieved from the db.
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"""
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if image_meta is None:
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try:
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image_meta = self.volume_api.get_volume_image_metadata(
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context, resp_volume)
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except Exception:
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return
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if image_meta:
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resp_volume['volume_image_metadata'] = dict(
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image_meta.iteritems())
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@wsgi.extends
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def show(self, req, resp_obj, id):
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context = req.environ['cinder.context']
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if authorize(context):
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resp_obj.attach(xml=VolumeImageMetadataTemplate())
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self._add_image_metadata(context, resp_obj.obj['volume'])
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@wsgi.extends
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def detail(self, req, resp_obj):
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context = req.environ['cinder.context']
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if authorize(context):
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resp_obj.attach(xml=VolumesImageMetadataTemplate())
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all_meta = self._get_all_images_metadata(context)
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for volume in list(resp_obj.obj.get('volumes', [])):
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image_meta = all_meta.get(volume['id'], {})
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self._add_image_metadata(context, volume, image_meta)
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class Volume_image_metadata(extensions.ExtensionDescriptor):
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"""Show image metadata associated with the volume."""
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name = "VolumeImageMetadata"
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alias = "os-vol-image-meta"
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namespace = ("http://docs.openstack.org/volume/ext/"
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"volume_image_metadata/api/v1")
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updated = "2012-12-07T00:00:00+00:00"
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def get_controller_extensions(self):
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controller = VolumeImageMetadataController()
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extension = extensions.ControllerExtension(self, 'volumes', controller)
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return [extension]
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class VolumeImageMetadataMetadataTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('volume_image_metadata',
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selector='volume_image_metadata')
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elem = xmlutil.SubTemplateElement(root, 'meta',
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selector=xmlutil.get_items)
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elem.set('key', 0)
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elem.text = 1
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return xmlutil.MasterTemplate(root, 1)
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class VolumeImageMetadataTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('volume', selector='volume')
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root.append(VolumeImageMetadataMetadataTemplate())
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alias = Volume_image_metadata.alias
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namespace = Volume_image_metadata.namespace
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return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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class VolumesImageMetadataTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('volumes')
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elem = xmlutil.SubTemplateElement(root, 'volume', selector='volume')
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elem.append(VolumeImageMetadataMetadataTemplate())
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alias = Volume_image_metadata.alias
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namespace = Volume_image_metadata.namespace
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return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
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