475332f9a8
We've been using msgpack just to pack the API document into sqlite binary documents. This is easily achievable with json. We can pull msgpack in again when there's a real use case for it. Change-Id: I60e31806edafd71de62a1809f047a8ad772094cc
157 lines
4.6 KiB
Python
157 lines
4.6 KiB
Python
# Copyright (c) 2013 Rackspace, 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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#
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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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from marconi.queues.storage import base
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from marconi.queues.storage import errors
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from marconi.queues.storage.sqlite import utils
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class QueueController(base.QueueBase):
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def list(self, project, marker=None,
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limit=None, detailed=False):
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if project is None:
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project = ''
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if limit is None:
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limit = self.driver.limits_conf.default_queue_paging
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sql = (('''
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select name from Queues''' if not detailed
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else '''
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select name, metadata from Queues''') +
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'''
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where project = ?''')
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args = [project]
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if marker:
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sql += '''
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and name > ?'''
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args += [marker]
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sql += '''
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order by name
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limit ?'''
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args += [limit]
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records = self.driver.run(sql, *args)
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marker_name = {}
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def it():
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for rec in records:
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marker_name['next'] = rec[0]
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yield ({'name': rec[0]} if not detailed
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else
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{'name': rec[0], 'metadata': rec[1]})
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yield it()
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yield marker_name['next']
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def get_metadata(self, name, project):
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if project is None:
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project = ''
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try:
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return self.driver.get('''
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select metadata from Queues
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where project = ? and name = ?''', project, name)[0]
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except utils.NoResult:
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raise errors.QueueDoesNotExist(name, project)
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def create(self, name, project):
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if project is None:
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project = ''
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self.driver.run('''
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insert or ignore into Queues
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values (null, ?, ?, "{}")
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''', project, name)
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return self.driver.affected
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def exists(self, name, project):
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if project is None:
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project = ''
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return self.driver.run('''
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select id from Queues
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where project = ? and name = ?
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''', project, name).fetchone() is not None
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def set_metadata(self, name, metadata, project):
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if project is None:
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project = ''
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self.driver.run('''
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update Queues
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set metadata = ?
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where project = ? and name = ?
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''', self.driver.pack(metadata), project, name)
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if not self.driver.affected:
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raise errors.QueueDoesNotExist(name, project)
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def delete(self, name, project):
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if project is None:
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project = ''
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self.driver.run('''
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delete from Queues
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where project = ? and name = ?''', project, name)
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def stats(self, name, project):
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if project is None:
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project = ''
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with self.driver('deferred'):
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qid = utils.get_qid(self.driver, name, project)
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claimed, free = self.driver.get('''
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select * from
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(select count(msgid)
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from Claims join Locked
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on id = cid
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where ttl > julianday() * 86400.0 - created
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and qid = ?),
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(select count(id)
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from Messages left join Locked
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on id = msgid
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where msgid is null
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and ttl > julianday() * 86400.0 - created
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and qid = ?)
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''', qid, qid)
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total = free + claimed
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message_stats = {
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'claimed': claimed,
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'free': free,
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'total': total,
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}
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try:
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message_controller = self.driver.message_controller
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oldest = message_controller.first(name, project, sort=1)
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newest = message_controller.first(name, project, sort=-1)
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except errors.QueueIsEmpty:
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pass
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else:
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message_stats['oldest'] = utils.stat_message(oldest)
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message_stats['newest'] = utils.stat_message(newest)
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return {'messages': message_stats}
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