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OpenStack Study: qos_specs.py

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# Copyright (C) 2013 eBay Inc.

# 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.

from cinder.api import common

from cinder.openstack.common import log as logging

LOG = logging.getLogger(__name__)

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class ViewBuilder(common.ViewBuilder):

"""Model QoS specs API responses as a python dictionary."""

_collection_name = "qos_specs"

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    def __init__(self):

        """Initialize view builder."""

        super(ViewBuilder, self).__init__()

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    def summary_list(self, request, qos_specs):

        """Show a list of qos_specs without many details."""

        return self._list_view(self.detail, request, qos_specs)

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    def summary(self, request, qos_spec):

        """Generic, non-detailed view of a qos_specs."""

        return {

            'qos_specs': qos_spec,

            'links': self._get_links(request,

                                     qos_spec['id']),

        }

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    def detail(self, request, qos_spec):

        """Detailed view of a single qos_spec."""

        #TODO(zhiteng) Add associations to detailed view

        return {

            'qos_specs': qos_spec,

            'links': self._get_links(request,

                                     qos_spec['id']),

        }

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    def associations(self, request, associates):

        """View of qos specs associations."""

        return {

            'qos_associations': associates

        }

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    def _list_view(self, func, request, qos_specs):

        """Provide a view for a list of qos_specs."""

        specs_list = [func(request, specs)['qos_specs'] for specs in qos_specs]

        specs_dict = dict(qos_specs=specs_list)

        return specs_dict