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catalogue.py
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catalogue.py
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# Copyright (c) 2013 Rackspace Hosting, Inc.
#
# 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.
"""MongoDB storage controller for the queues catalogue.
Serves to construct an association between a project + queue -> pool
{
'p_q': project_queue :: six.text_type,
's': pool_identifier :: six.text_type
}
"""
import marconi.openstack.common.log as logging
from marconi.queues.storage import base
from marconi.queues.storage import errors
from marconi.queues.storage.mongodb import utils
LOG = logging.getLogger(__name__)
PRIMARY_KEY = utils.PROJ_QUEUE_KEY
CATALOGUE_INDEX = [
(PRIMARY_KEY, 1)
]
class CatalogueController(base.CatalogueBase):
def __init__(self, *args, **kwargs):
super(CatalogueController, self).__init__(*args, **kwargs)
self._col = self.driver.database.catalogue
self._col.ensure_index(CATALOGUE_INDEX, unique=True)
@utils.raises_conn_error
def _insert(self, project, queue, pool, upsert):
key = utils.scope_queue_name(queue, project)
return self._col.update({PRIMARY_KEY: key},
{'$set': {'s': pool}}, upsert=upsert)
@utils.raises_conn_error
def list(self, project):
fields = {'_id': 0}
query = utils.scoped_query(None, project)
return utils.HookedCursor(self._col.find(query, fields),
_normalize)
@utils.raises_conn_error
def get(self, project, queue):
fields = {'_id': 0}
key = utils.scope_queue_name(queue, project)
entry = self._col.find_one({PRIMARY_KEY: key},
fields=fields)
if entry is None:
raise errors.QueueNotMapped(project, queue)
return _normalize(entry)
@utils.raises_conn_error
def exists(self, project, queue):
key = utils.scope_queue_name(queue, project)
return self._col.find_one({PRIMARY_KEY: key}) is not None
def insert(self, project, queue, pool):
# NOTE(cpp-cabrera): _insert handles conn_error
self._insert(project, queue, pool, upsert=True)
@utils.raises_conn_error
def delete(self, project, queue):
self._col.remove({PRIMARY_KEY: utils.scope_queue_name(queue, project)},
w=0)
def update(self, project, queue, pool=None):
# NOTE(cpp-cabrera): _insert handles conn_error
res = self._insert(project, queue, pool, upsert=False)
if not res['updatedExisting']:
raise errors.QueueNotMapped(project, queue)
@utils.raises_conn_error
def drop_all(self):
self._col.drop()
self._col.ensure_index(CATALOGUE_INDEX, unique=True)
def _normalize(entry):
project, queue = utils.parse_scoped_project_queue(entry[PRIMARY_KEY])
return {
'queue': queue,
'project': project,
'pool': entry['s']
}