7adaf3aa4d
The sqlalchemy.BINARY and sqlalchemy.LargeBinary in Python 3 works with 'bytes' not 'str'. This patch adds explicit proper encoding/decoding before saving such fields. Partially-implements: blueprint py3k-support Closes-bug: 1321840 Change-Id: Iddeeab3bee84fecea43551d3f2924973e917382c
295 lines
10 KiB
Python
295 lines
10 KiB
Python
# Copyright (c) 2014 Red Hat, 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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import calendar
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import sqlalchemy as sa
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from sqlalchemy.sql import func as sfunc
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from marconi.openstack.common import timeutils
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from marconi.queues import storage
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from marconi.queues.storage import errors
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from marconi.queues.storage.sqlalchemy import tables
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from marconi.queues.storage.sqlalchemy import utils
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class MessageController(storage.Message):
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def _get(self, queue, message_id, project, count=False):
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if project is None:
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project = ''
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mid = utils.msgid_decode(message_id)
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if mid is None:
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raise errors.MessageDoesNotExist(message_id, queue, project)
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try:
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j = sa.join(tables.Messages, tables.Queues,
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tables.Messages.c.qid == tables.Queues.c.id)
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sel = sa.sql.select([tables.Messages.c.body,
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tables.Messages.c.ttl,
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tables.Messages.c.created])
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if count:
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sel = sa.sql.select([sfunc.count(tables.Messages.c.id)])
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sel = sel.select_from(j)
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sel = sel.where(sa.and_(tables.Messages.c.id == mid,
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tables.Queues.c.project == project,
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tables.Queues.c.name == queue,
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tables.Messages.c.ttl >
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sfunc.now() - tables.Messages.c.created))
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return self.driver.get(sel)
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except utils.NoResult:
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raise errors.MessageDoesNotExist(message_id, queue, project)
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def _exists(self, queue, message_id, project):
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try:
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# NOTE(flaper87): Use count to avoid returning
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# unnecessary data from the database.
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self._get(queue, message_id, project, count=True)
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return True
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except errors.MessageDoesNotExist:
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return False
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def get(self, queue, message_id, project):
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body, ttl, created = self._get(queue, message_id, project)
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now = timeutils.utcnow_ts()
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return {
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'id': message_id,
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'ttl': ttl,
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'age': now - calendar.timegm(created.timetuple()),
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'body': utils.json_decode(body),
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}
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def bulk_get(self, queue, message_ids, project):
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if project is None:
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project = ''
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message_ids = [id for id in
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map(utils.msgid_decode, message_ids)
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if id is not None]
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statement = sa.sql.select([tables.Messages.c.id,
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tables.Messages.c.body,
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tables.Messages.c.ttl,
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tables.Messages.c.created])
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and_stmt = [tables.Messages.c.id.in_(message_ids),
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tables.Queues.c.name == queue,
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tables.Queues.c.project == project,
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tables.Messages.c.ttl >
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sfunc.now() - tables.Messages.c.created]
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j = sa.join(tables.Messages, tables.Queues,
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tables.Messages.c.qid == tables.Queues.c.id)
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statement = statement.select_from(j).where(sa.and_(*and_stmt))
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now = timeutils.utcnow_ts()
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records = self.driver.run(statement)
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for id, body, ttl, created in records:
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yield {
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'id': utils.msgid_encode(int(id)),
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'ttl': ttl,
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'age': now - calendar.timegm(created.timetuple()),
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'body': utils.json_decode(body),
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}
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def first(self, queue, project=None, sort=1):
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if project is None:
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project = ''
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qid = utils.get_qid(self.driver, queue, project)
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sel = sa.sql.select([tables.Messages.c.id,
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tables.Messages.c.body,
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tables.Messages.c.ttl,
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tables.Messages.c.created],
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sa.and_(
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tables.Messages.c.ttl >
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sfunc.now() - tables.Messages.c.created,
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tables.Messages.c.qid == qid))
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if sort not in (1, -1):
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raise ValueError(u'sort must be either 1 (ascending) '
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u'or -1 (descending)')
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order = sa.asc
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if sort == -1:
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order = sa.desc
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sel = sel.order_by(order(tables.Messages.c.id))
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try:
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id, body, ttl, created = self.driver.get(sel)
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except utils.NoResult:
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raise errors.QueueIsEmpty(queue, project)
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created_iso = timeutils.isotime(created)
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return {
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'id': utils.msgid_encode(int(id)),
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'ttl': ttl,
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'created': created_iso,
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'age': int((timeutils.utcnow() - created).seconds),
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'body': body,
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}
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def list(self, queue, project, marker=None,
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limit=storage.DEFAULT_MESSAGES_PER_PAGE,
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echo=False, client_uuid=None, include_claimed=False):
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if project is None:
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project = ''
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with self.driver.trans() as trans:
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sel = sa.sql.select([tables.Messages.c.id,
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tables.Messages.c.body,
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tables.Messages.c.ttl,
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tables.Messages.c.created])
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j = sa.join(tables.Messages, tables.Queues,
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tables.Messages.c.qid == tables.Queues.c.id)
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sel = sel.select_from(j)
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and_clause = [tables.Queues.c.name == queue,
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tables.Queues.c.project == project]
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if not echo:
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and_clause.append(tables.Messages.c.client != str(client_uuid))
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if marker:
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mark = utils.marker_decode(marker)
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if mark:
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and_clause.append(tables.Messages.c.id > mark)
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else:
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# NOTE(flaper87): Awful hack.
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# If the marker is invalid, we don't want to
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# return *any* record. Since rows PKs start
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# from 0, it won't match anything and the query
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# will still be fast.
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and_clause.append(tables.Messages.c.id < -1)
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if not include_claimed:
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and_clause.append(tables.Messages.c.cid == (None))
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sel = sel.where(sa.and_(*and_clause))
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sel = sel.limit(limit)
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records = trans.execute(sel)
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marker_id = {}
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def it():
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now = timeutils.utcnow_ts()
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for id, body, ttl, created in records:
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marker_id['next'] = id
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yield {
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'id': utils.msgid_encode(id),
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'ttl': ttl,
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'age': now - calendar.timegm(created.timetuple()),
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'body': utils.json_decode(body),
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}
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yield it()
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yield utils.marker_encode(marker_id['next'])
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def post(self, queue, messages, client_uuid, project):
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if project is None:
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project = ''
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with self.driver.trans() as trans:
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qid = utils.get_qid(self.driver, queue, project)
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# cleanup all expired messages in this queue
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#self.driver.run('''
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# delete from Messages
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# where ttl <= julianday() * 86400.0 - created
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# and qid = ?''', qid)
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# executemany() sets lastrowid to None, so no matter we manually
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# generate the IDs or not, we still need to query for it.
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def it():
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for m in messages:
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yield dict(qid=qid,
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ttl=m['ttl'],
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body=utils.json_encode(m['body']),
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client=str(client_uuid))
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result = trans.execute(tables.Messages.insert(), list(it()))
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statement = sa.sql.select([tables.Messages.c.id])
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statement = statement.limit(result.rowcount)
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statement = statement.order_by(tables.Messages.c.id.desc())
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result = trans.execute(statement).fetchall()
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return map(utils.msgid_encode, [i[0] for i in reversed(result)])
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def delete(self, queue, message_id, project, claim=None):
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if project is None:
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project = ''
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mid = utils.msgid_decode(message_id)
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if mid is None:
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return
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with self.driver.trans() as trans:
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if not self._exists(queue, message_id, project):
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return
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statement = tables.Messages.delete()
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and_stmt = [tables.Messages.c.id == mid]
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exists = sa.sql.select([tables.Messages.c.id], sa.and_(*and_stmt))
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if not trans.execute(exists).first():
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return
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cid = claim and utils.cid_decode(claim) or None
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if claim and cid is None:
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return
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and_stmt.append(tables.Messages.c.cid == cid)
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statement = statement.where(sa.and_(*and_stmt))
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res = trans.execute(statement)
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if res.rowcount == 0:
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raise errors.MessageIsClaimed(mid)
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def bulk_delete(self, queue, message_ids, project):
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if project is None:
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project = ''
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message_ids = [id for id in
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map(utils.msgid_decode, message_ids) if id]
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with self.driver.trans() as trans:
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try:
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qid = utils.get_qid(self.driver, queue, project)
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except errors.QueueDoesNotExist:
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return
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statement = tables.Messages.delete()
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and_stmt = [tables.Messages.c.id.in_(message_ids),
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tables.Messages.c.qid == qid]
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trans.execute(statement.where(sa.and_(*and_stmt)))
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