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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010-2011 OpenStack LLC.
# 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 hashlib
from nova.compute import power_state
from nova.api.openstack import common
from nova.api.openstack.views import addresses as addresses_view
from nova.api.openstack.views import flavors as flavors_view
from nova.api.openstack.views import images as images_view
from nova import utils
def get_view_builder(req):
'''
A factory method that returns the correct builder based on the version of
the api requested.
'''
version = common.get_api_version(req)
addresses_builder = addresses_view.get_view_builder(req)
if version == '1.1':
flavor_builder = flavors_view.get_view_builder(req)
image_builder = images_view.get_view_builder(req)
return ViewBuilder_1_1(addresses_builder, flavor_builder,
image_builder)
else:
return ViewBuilder_1_0(addresses_builder)
class ViewBuilder(object):
'''
Models a server response as a python dictionary.
Abstract methods: _build_image, _build_flavor
'''
def __init__(self, addresses_builder):
self.addresses_builder = addresses_builder
def build(self, inst, is_detail):
"""
Coerces into dictionary format, mapping everything to
Rackspace-like attributes for return
"""
if is_detail:
return self._build_detail(inst)
else:
return self._build_simple(inst)
def _build_simple(self, inst):
return dict(server=dict(id=inst['id'], name=inst['display_name']))
def _build_detail(self, inst):
power_mapping = {
None: 'build',
power_state.NOSTATE: 'build',
power_state.RUNNING: 'active',
power_state.BLOCKED: 'active',
power_state.SUSPENDED: 'suspended',
power_state.PAUSED: 'paused',
power_state.SHUTDOWN: 'active',
power_state.SHUTOFF: 'active',
power_state.CRASHED: 'error',
power_state.FAILED: 'error'}
inst_dict = {}
#mapped_keys = dict(status='state', imageId='image_id',
# flavorId='instance_type', name='display_name', id='id')
mapped_keys = dict(status='state', name='display_name', id='id')
for k, v in mapped_keys.iteritems():
inst_dict[k] = inst[v]
inst_dict['status'] = power_mapping[inst_dict['status']]
inst_dict['addresses'] = self.addresses_builder.build(inst)
# Return the metadata as a dictionary
metadata = {}
for item in inst['metadata']:
metadata[item['key']] = item['value']
inst_dict['metadata'] = metadata
inst_dict['hostId'] = ''
if inst['host']:
inst_dict['hostId'] = hashlib.sha224(inst['host']).hexdigest()
self._build_image(inst_dict, inst)
self._build_flavor(inst_dict, inst)
return dict(server=inst_dict)
def _build_image(self, response, inst):
raise NotImplementedError()
def _build_flavor(self, response, inst):
raise NotImplementedError()
class ViewBuilder_1_0(ViewBuilder):
def _build_image(self, response, inst):
response["imageId"] = inst["image_id"]
def _build_flavor(self, response, inst):
response["flavorId"] = inst["instance_type"]
class ViewBuilder_1_1(ViewBuilder):
def __init__(self, addresses_builder, flavor_builder, image_builder):
ViewBuilder.__init__(self, addresses_builder)
self.flavor_builder = flavor_builder
self.image_builder = image_builder
def _build_image(self, response, inst):
image_id = inst["image_id"]
response["imageRef"] = self.image_builder.generate_href(image_id)
def _build_flavor(self, response, inst):
flavor_id = inst["instance_type"]
response["flavorRef"] = self.flavor_builder.generate_href(flavor_id)
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