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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 OpenStack Foundation
#
# 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 webob.exc
from nova.api.openstack import extensions
from nova.api.openstack import wsgi
class SchedulerHintsController(wsgi.Controller):
@staticmethod
def _extract_scheduler_hints(body):
hints = {}
attr = '%s:scheduler_hints' % Scheduler_hints.alias
try:
if 'os:scheduler_hints' in body:
# NOTE(vish): This is for legacy support
hints.update(body['os:scheduler_hints'])
elif attr in body:
hints.update(body[attr])
# Fail if non-dict provided
except ValueError:
msg = _("Malformed scheduler_hints attribute")
raise webob.exc.HTTPBadRequest(reason=msg)
return hints
@wsgi.extends
def create(self, req, body):
hints = self._extract_scheduler_hints(body)
if 'server' in body:
body['server']['scheduler_hints'] = hints
yield
class Scheduler_hints(extensions.ExtensionDescriptor):
"""Pass arbitrary key/value pairs to the scheduler."""
name = "SchedulerHints"
alias = "OS-SCH-HNT"
namespace = ("http://docs.openstack.org/compute/ext/"
"scheduler-hints/api/v2")
updated = "2011-07-19T00:00:00+00:00"
def get_controller_extensions(self):
controller = SchedulerHintsController()
ext = extensions.ControllerExtension(self, 'servers', controller)
return [ext]
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