126 lines
3.5 KiB
Python
126 lines
3.5 KiB
Python
# Copyright 2011 OpenStack Foundation
|
|
# 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.
|
|
|
|
"""
|
|
Controller for Image Cache Management API
|
|
"""
|
|
|
|
import webob.exc
|
|
|
|
from glance.api import policy
|
|
from glance.api.v1 import controller
|
|
from glance.common import exception
|
|
from glance.common import wsgi
|
|
from glance import image_cache
|
|
|
|
|
|
class Controller(controller.BaseController):
|
|
"""
|
|
A controller for managing cached images.
|
|
"""
|
|
|
|
def __init__(self):
|
|
self.cache = image_cache.ImageCache()
|
|
self.policy = policy.Enforcer()
|
|
|
|
def _enforce(self, req):
|
|
"""Authorize request against 'manage_image_cache' policy"""
|
|
try:
|
|
self.policy.enforce(req.context, 'manage_image_cache', {})
|
|
except exception.Forbidden:
|
|
raise webob.exc.HTTPForbidden()
|
|
|
|
def get_cached_images(self, req):
|
|
"""
|
|
GET /cached_images
|
|
|
|
Returns a mapping of records about cached images.
|
|
"""
|
|
self._enforce(req)
|
|
images = self.cache.get_cached_images()
|
|
return dict(cached_images=images)
|
|
|
|
def delete_cached_image(self, req, image_id):
|
|
"""
|
|
DELETE /cached_images/<IMAGE_ID>
|
|
|
|
Removes an image from the cache.
|
|
"""
|
|
self._enforce(req)
|
|
self.cache.delete_cached_image(image_id)
|
|
|
|
def delete_cached_images(self, req):
|
|
"""
|
|
DELETE /cached_images - Clear all active cached images
|
|
|
|
Removes all images from the cache.
|
|
"""
|
|
self._enforce(req)
|
|
return dict(num_deleted=self.cache.delete_all_cached_images())
|
|
|
|
def get_queued_images(self, req):
|
|
"""
|
|
GET /queued_images
|
|
|
|
Returns a mapping of records about queued images.
|
|
"""
|
|
self._enforce(req)
|
|
images = self.cache.get_queued_images()
|
|
return dict(queued_images=images)
|
|
|
|
def queue_image(self, req, image_id):
|
|
"""
|
|
PUT /queued_images/<IMAGE_ID>
|
|
|
|
Queues an image for caching. We do not check to see if
|
|
the image is in the registry here. That is done by the
|
|
prefetcher...
|
|
"""
|
|
self._enforce(req)
|
|
self.cache.queue_image(image_id)
|
|
|
|
def delete_queued_image(self, req, image_id):
|
|
"""
|
|
DELETE /queued_images/<IMAGE_ID>
|
|
|
|
Removes an image from the cache.
|
|
"""
|
|
self._enforce(req)
|
|
self.cache.delete_queued_image(image_id)
|
|
|
|
def delete_queued_images(self, req):
|
|
"""
|
|
DELETE /queued_images - Clear all active queued images
|
|
|
|
Removes all images from the cache.
|
|
"""
|
|
self._enforce(req)
|
|
return dict(num_deleted=self.cache.delete_all_queued_images())
|
|
|
|
|
|
class CachedImageDeserializer(wsgi.JSONRequestDeserializer):
|
|
pass
|
|
|
|
|
|
class CachedImageSerializer(wsgi.JSONResponseSerializer):
|
|
pass
|
|
|
|
|
|
def create_resource():
|
|
"""Cached Images resource factory method"""
|
|
deserializer = CachedImageDeserializer()
|
|
serializer = CachedImageSerializer()
|
|
return wsgi.Resource(Controller(), deserializer, serializer)
|