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OpenStack Study: servicetype.py

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# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2013 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.

#

# @author: Salvatore Orlando, VMware

#

from neutron.api import extensions

from neutron.api.v2 import attributes

from neutron.api.v2 import base

from neutron.db import servicetype_db

from neutron.openstack.common import log as logging

LOG = logging.getLogger(__name__)

RESOURCE_NAME = "service_provider"

COLLECTION_NAME = "%ss" % RESOURCE_NAME

SERVICE_ATTR = 'service_type'

PLUGIN_ATTR = 'plugin'

DRIVER_ATTR = 'driver'

EXT_ALIAS = 'service-type'

# Attribute Map for Service Provider Resource

# Allow read-only access

RESOURCE_ATTRIBUTE_MAP = {

COLLECTION_NAME: {

'service_type': {'allow_post': False, 'allow_put': False,

'is_visible': True},

'name': {'allow_post': False, 'allow_put': False,

'is_visible': True},

'default': {'allow_post': False, 'allow_put': False,

'is_visible': True},

}

}

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class Servicetype(extensions.ExtensionDescriptor):

@classmethod

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    def get_name(cls):

        return _("Neutron Service Type Management")

    @classmethod

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    def get_alias(cls):

        return EXT_ALIAS

    @classmethod

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    def get_description(cls):

        return _("API for retrieving service providers for "

                 "Neutron advanced services")

    @classmethod

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    def get_namespace(cls):

        return "http://docs.openstack.org/ext/neutron/service-type/api/v1.0"

    @classmethod

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    def get_updated(cls):

        return "2013-01-20T00:00:00-00:00"

    @classmethod

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    def get_resources(cls):

        """Returns Extended Resource for service type management."""

        my_plurals = [(key, key[:-1]) for key in RESOURCE_ATTRIBUTE_MAP.keys()]

        attributes.PLURALS.update(dict(my_plurals))

        attr_map = RESOURCE_ATTRIBUTE_MAP[COLLECTION_NAME]

        collection_name = COLLECTION_NAME.replace('_', '-')

        controller = base.create_resource(

            collection_name,

            RESOURCE_NAME,

            servicetype_db.ServiceTypeManager.get_instance(),

            attr_map)

        return [extensions.ResourceExtension(collection_name,

                                             controller,

                                             attr_map=attr_map)]

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    def get_extended_resources(self, version):

        if version == "2.0":

            return RESOURCE_ATTRIBUTE_MAP

        else:

            return {}