109 lines
3.3 KiB
Python
109 lines
3.3 KiB
Python
# Copyright (c) 2013 Rackspace Hosting, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""MongoDB storage controller for the queues catalogue.
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Serves to construct an association between a project + queue -> pool.
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::
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{
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'p_q': project_queue :: str,
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's': pool_identifier :: str
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}
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"""
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from zaqar.storage import base
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from zaqar.storage import errors
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from zaqar.storage.mongodb import utils
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PRIMARY_KEY = utils.PROJ_QUEUE_KEY
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CATALOGUE_INDEX = [
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(PRIMARY_KEY, 1)
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]
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class CatalogueController(base.CatalogueBase):
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def __init__(self, *args, **kwargs):
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super(CatalogueController, self).__init__(*args, **kwargs)
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self._col = self.driver.database.catalogue
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self._col.create_index(CATALOGUE_INDEX, unique=True)
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@utils.raises_conn_error
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def _insert(self, project, queue, pool, upsert):
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key = utils.scope_queue_name(queue, project)
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return self._col.update_one({PRIMARY_KEY: key},
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{'$set': {'s': pool}}, upsert=upsert)
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@utils.raises_conn_error
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def list(self, project):
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fields = {'_id': 0}
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query = utils.scoped_query(None, project)
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ntotal = self._col.count_documents(query)
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return utils.HookedCursor(self._col.find(query, fields),
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_normalize, ntotal=ntotal)
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@utils.raises_conn_error
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def get(self, project, queue):
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fields = {'_id': 0}
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key = utils.scope_queue_name(queue, project)
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entry = self._col.find_one({PRIMARY_KEY: key},
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projection=fields)
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if entry is None:
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raise errors.QueueNotMapped(queue, project)
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return _normalize(entry)
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@utils.raises_conn_error
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def exists(self, project, queue):
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key = utils.scope_queue_name(queue, project)
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return self._col.find_one({PRIMARY_KEY: key}) is not None
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def insert(self, project, queue, pool):
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# NOTE(cpp-cabrera): _insert handles conn_error
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self._insert(project, queue, pool, upsert=True)
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@utils.raises_conn_error
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def delete(self, project, queue):
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self._col.delete_one({
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PRIMARY_KEY: utils.scope_queue_name(queue, project)})
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def update(self, project, queue, pool=None):
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# NOTE(cpp-cabrera): _insert handles conn_error
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res = self._insert(project, queue, pool, upsert=False)
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if res.matched_count == 0:
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raise errors.QueueNotMapped(queue, project)
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@utils.raises_conn_error
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def drop_all(self):
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self._col.drop()
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self._col.create_index(CATALOGUE_INDEX, unique=True)
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def _normalize(entry):
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project, queue = utils.parse_scoped_project_queue(entry[PRIMARY_KEY])
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return {
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'queue': queue,
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'project': project,
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'pool': entry['s']
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}
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