def get(self, queue, claim_id, project=None): if project is None: project = '' cid = utils.cid_decode(claim_id) if cid is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) with self.driver.trans() as trans: sel = sa.sql.select([tables.Claims.c.id, tables.Claims.c.ttl, tables.Claims.c.created], sa.and_(tables.Claims.c.ttl > utils.get_age(tables.Claims.c.created), tables.Claims.c.id == cid, tables.Queues.c.project == project, tables.Queues.c.name == queue), from_obj=[tables.Queues.join(tables.Claims)]) res = trans.execute(sel).fetchone() if res is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) cid, ttl, created = res return ( {'id': claim_id, 'ttl': ttl, 'age': (timeutils.utcnow() - created).seconds}, list(self.__get(cid, trans)) )
def update(self, queue, claim_id, metadata, project=None): if project is None: project = '' cid = utils.cid_decode(claim_id) if cid is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) age = utils.get_age(tables.Claims.c.created) with self.driver.trans() as trans: qid = utils.get_qid(self.driver, queue, project) update = tables.Claims.update().where(sa.and_( tables.Claims.c.ttl > age, tables.Claims.c.id == cid, tables.Claims.c.id == qid)) update = update.values(ttl=metadata['ttl']) res = trans.execute(update) if res.rowcount != 1: raise errors.ClaimDoesNotExist(claim_id, queue, project) update = (tables.Messages.update(). values(ttl=metadata['ttl'] + metadata['grace']). where(sa.and_( tables.Messages.c.ttl < metadata['ttl'], tables.Messages.c.cid == cid))) trans.execute(update)
def get(self, queue, claim_id, project=None): if project is None: project = '' cid = utils.cid_decode(claim_id) if cid is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) with self.driver.trans() as trans: sel = sa.sql.select([tables.Claims.c.id, tables.Claims.c.ttl, tables.Claims.c.created], sa.and_(tables.Claims.c.ttl > utils.get_age(tables.Claims.c.created), tables.Claims.c.id == cid, tables.Queues.c.project == project, tables.Queues.c.name == queue), from_obj=[tables.Queues.join(tables.Claims)]) res = trans.execute(sel).fetchone() if res is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) cid, ttl, created = res return ( {'id': claim_id, 'ttl': ttl, 'age': (timeutils.utcnow() - created).seconds}, list(self.__get(cid, trans)) )
def update(self, queue, claim_id, metadata, project=None): if project is None: project = '' cid = utils.cid_decode(claim_id) if cid is None: raise errors.ClaimDoesNotExist(claim_id, queue, project) age = utils.get_age(tables.Claims.c.created) with self.driver.trans() as trans: qid = utils.get_qid(self.driver, queue, project) update = tables.Claims.update().where(sa.and_( tables.Claims.c.ttl > age, tables.Claims.c.id == cid, tables.Claims.c.id == qid)) update = update.values(ttl=metadata['ttl']) res = trans.execute(update) if res.rowcount != 1: raise errors.ClaimDoesNotExist(claim_id, queue, project) update = (tables.Messages.update(). values(ttl=metadata['ttl'] + metadata['grace']). where(sa.and_( tables.Messages.c.ttl < metadata['ttl'], tables.Messages.c.cid == cid))) trans.execute(update)
def create(self, queue, metadata, project=None, limit=storage.DEFAULT_MESSAGES_PER_CLAIM): if project is None: project = '' with self.driver.trans() as trans: try: qid = utils.get_qid(self.driver, queue, project) except errors.QueueDoesNotExist: return None, iter([]) # Clean up all expired claims in this queue dlt = tables.Claims.delete().where( sa.and_( tables.Claims.c.ttl <= utils.get_age( tables.Claims.c.created), tables.Claims.c.qid == qid)) trans.execute(dlt) ins = tables.Claims.insert().values(qid=qid, ttl=metadata['ttl']) res = trans.execute(ins) cid = res.lastrowid and_stmt = sa.and_( tables.Messages.c.cid == (None), tables.Messages.c.ttl > sfunc.now() - tables.Messages.c.created, tables.Messages.c.qid == qid) sel = sa.sql.select([tables.Messages.c.id], and_stmt).limit(limit) records = [t[0] for t in trans.execute(sel)] and_stmt = sa.and_(tables.Messages.c.id.in_(records)) update = tables.Messages.update().values(cid=cid).where(and_stmt) trans.execute(update) # NOTE(flaper87): I bet there's a better way # to do this. messages_ttl = metadata['ttl'] + metadata['grace'] update = (tables.Messages.update().values(ttl=messages_ttl).where( sa.and_(tables.Messages.c.ttl < messages_ttl, tables.Messages.c.cid == cid))) trans.execute(update) return (utils.cid_encode(int(cid)), list(self.__get(cid, trans)))
def create(self, queue, metadata, project=None, limit=storage.DEFAULT_MESSAGES_PER_CLAIM): if project is None: project = '' with self.driver.trans() as trans: try: qid = utils.get_qid(self.driver, queue, project) except errors.QueueDoesNotExist: return None, iter([]) # Clean up all expired claims in this queue dlt = tables.Claims.delete().where(sa.and_( tables.Claims.c.ttl <= utils.get_age(tables.Claims.c.created), tables.Claims.c.qid == qid)) trans.execute(dlt) ins = tables.Claims.insert().values(qid=qid, ttl=metadata['ttl']) res = trans.execute(ins) cid = res.lastrowid and_stmt = sa.and_(tables.Messages.c.cid == (None), tables.Messages.c.ttl > sfunc.now() - tables.Messages.c.created, tables.Messages.c.qid == qid) sel = sa.sql.select([tables.Messages.c.id], and_stmt).limit(limit) records = [t[0] for t in trans.execute(sel)] and_stmt = sa.and_(tables.Messages.c.id.in_(records)) update = tables.Messages.update().values(cid=cid).where(and_stmt) trans.execute(update) # NOTE(flaper87): I bet there's a better way # to do this. messages_ttl = metadata['ttl'] + metadata['grace'] update = (tables.Messages.update().values(ttl=messages_ttl). where(sa.and_( tables.Messages.c.ttl < messages_ttl, tables.Messages.c.cid == cid))) trans.execute(update) return (utils.cid_encode(int(cid)), list(self.__get(cid, trans)))
def __get(self, cid, trans): # NOTE(flaper87): This probably needs to # join on `Claim` to check the claim ttl. sel = sa.sql.select([tables.Messages.c.id, tables.Messages.c.body, tables.Messages.c.ttl, tables.Messages.c.created], sa.and_( tables.Messages.c.ttl > utils.get_age(tables.Messages.c.created), # tables.Messages.c.ttl > # utils.get_age(tables.Claims.c.created), tables.Messages.c.cid == cid)) records = trans.execute(sel) for id, body, ttl, created in records: yield { 'id': utils.msgid_encode(int(id)), 'ttl': ttl, 'age': (timeutils.utcnow() - created).seconds, 'body': utils.json_decode(body), }
def __get(self, cid, trans): # NOTE(flaper87): This probably needs to # join on `Claim` to check the claim ttl. sel = sa.sql.select([tables.Messages.c.id, tables.Messages.c.body, tables.Messages.c.ttl, tables.Messages.c.created], sa.and_( tables.Messages.c.ttl > utils.get_age(tables.Messages.c.created), # tables.Messages.c.ttl > # utils.get_age(tables.Claims.c.created), tables.Messages.c.cid == cid)) records = trans.execute(sel) for id, body, ttl, created in records: yield { 'id': utils.msgid_encode(int(id)), 'ttl': ttl, 'age': (timeutils.utcnow() - created).seconds, 'body': utils.json_decode(body), }