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OpenStack Study: keypair.py

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# Copyright 2013 IBM Corp.

#

# 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 nova import db

from nova import exception

from nova.objects import base

from nova.objects import fields

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class KeyPair(base.NovaPersistentObject, base.NovaObject):

# Version 1.0: Initial version

# Version 1.1: String attributes updated to support unicode

VERSION = '1.1'

fields = {

'id': fields.IntegerField(),

'name': fields.StringField(nullable=True),

'user_id': fields.StringField(nullable=True),

'fingerprint': fields.StringField(nullable=True),

'public_key': fields.StringField(nullable=True),

}

@staticmethod

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    def _from_db_object(context, keypair, db_keypair):

        for key in keypair.fields:

            keypair[key] = db_keypair[key]

        keypair._context = context

        keypair.obj_reset_changes()

        return keypair

    @base.remotable_classmethod

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    def get_by_name(cls, context, user_id, name):

        db_keypair = db.key_pair_get(context, user_id, name)

        return cls._from_db_object(context, cls(), db_keypair)

    @base.remotable_classmethod

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    def destroy_by_name(cls, context, user_id, name):

        db.key_pair_destroy(context, user_id, name)

    @base.remotable

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    def create(self, context):

        if self.obj_attr_is_set('id'):

            raise exception.ObjectActionError(action='create',

                                              reason='already created')

        updates = self.obj_get_changes()

        updates.pop('id', None)

        db_keypair = db.key_pair_create(context, updates)

        self._from_db_object(context, self, db_keypair)

    @base.remotable

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    def destroy(self, context):

        db.key_pair_destroy(context, self.user_id, self.name)

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class KeyPairList(base.ObjectListBase, base.NovaObject):

# Version 1.0: Initial version

# KeyPair <= version 1.1

VERSION = '1.0'

fields = {

'objects': fields.ListOfObjectsField('KeyPair'),

}

child_versions = {

'1.0': '1.1',

# NOTE(danms): KeyPair was at 1.1 before we added this

}

@base.remotable_classmethod

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    def get_by_user(cls, context, user_id):

        db_keypairs = db.key_pair_get_all_by_user(context, user_id)

        return base.obj_make_list(context, KeyPairList(), KeyPair, db_keypairs)

    @base.remotable_classmethod

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    def get_count_by_user(cls, context, user_id):

        return db.key_pair_count_by_user(context, user_id)