def get(self, queue, message_id, project, count=False):
if project is None:
project = ''
mid = utils.msgid_decode(message_id)
if mid is None:
raise errors.MessageDoesNotExist(message_id, queue, project)
try:
j = sa.join(tables.Messages, tables.Queues,
tables.Messages.c.qid == tables.Queues.c.id)
sel = sa.sql.select([tables.Messages.c.body,
tables.Messages.c.ttl,
tables.Messages.c.created])
if count:
sel = sa.sql.select([sfunc.count(tables.Messages.c.id)])
sel = sel.select_from(j)
sel = sel.where(sa.and_(tables.Messages.c.id == mid,
tables.Queues.c.project == project,
tables.Queues.c.name == queue,
tables.Messages.c.ttl >
sfunc.now() - tables.Messages.c.created))
return self.driver.get(sel)[0]
except utils.NoResult:
raise errors.MessageDoesNotExist(message_id, queue, project)
def delete(self, queue, message_id, project, claim=None):
if project is None:
project = ''
mid = utils.msgid_decode(message_id)
if mid is None:
return
with self.driver.trans() as trans:
try:
self.get(queue, message_id, project, count=True)
except errors.MessageDoesNotExist:
return
statement = tables.Messages.delete()
and_stmt = [tables.Messages.c.id == mid]
exists = sa.sql.select([tables.Messages.c.id], sa.and_(*and_stmt))
if not trans.execute(exists).first():
return
cid = claim and utils.cid_decode(claim) or None
if claim and cid is None:
return
and_stmt.append(tables.Messages.c.cid == cid)
statement = statement.where(sa.and_(*and_stmt))
res = trans.execute(statement)
if res.rowcount == 0:
raise errors.MessageIsClaimed(mid)
