def get(self, queue, claim_id, project):
if project is None:
project = ''
cid = utils.cid_decode(claim_id)
if cid is None:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
with self.driver('deferred'):
try:
id, ttl, age = self.driver.get(
'''
select C.id, C.ttl, julianday() * 86400.0 - C.created
from Queues as Q join Claims as C
on Q.id = C.qid
where C.ttl > julianday() * 86400.0 - C.created
and C.id = ? and project = ? and name = ?
''', cid, project, queue)
return ({
'id': claim_id,
'ttl': ttl,
'age': int(age),
}, self.__get(id))
except utils.NoResult:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
def get(self, queue, claim_id, project):
if project is None:
project = ''
with self.driver('deferred'):
try:
id, ttl, age = self.driver.get('''
select C.id, C.ttl, julianday() * 86400.0 - C.created
from Queues as Q join Claims as C
on Q.id = C.qid
where C.ttl > julianday() * 86400.0 - C.created
and C.id = ? and project = ? and name = ?
''', utils.cid_decode(claim_id), project, queue)
return (
{
'id': claim_id,
'ttl': ttl,
'age': int(age),
},
self.__get(id)
)
except (utils.NoResult, exceptions.MalformedID()):
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
def update(self, queue, claim_id, metadata, project):
if project is None:
project = ''
try:
id = utils.cid_decode(claim_id)
except exceptions.MalformedID:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
with self.driver('deferred'):
# still delay the cleanup here
self.driver.run('''
update Claims
set created = julianday() * 86400.0,
ttl = ?
where ttl > julianday() * 86400.0 - created
and id = ?
and qid = (select id from Queues
where project = ? and name = ?)
''', metadata['ttl'], id, project, queue)
if not self.driver.affected:
raise exceptions.ClaimDoesNotExist(claim_id,
queue,
project)
self.__update_claimed(id, metadata['ttl'])
def update(self, queue, claim_id, metadata, project):
if project is None:
project = ''
id = utils.cid_decode(claim_id)
if id is None:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
with self.driver('deferred'):
# still delay the cleanup here
self.driver.run(
'''
update Claims
set created = julianday() * 86400.0,
ttl = ?
where ttl > julianday() * 86400.0 - created
and id = ?
and qid = (select id from Queues
where project = ? and name = ?)
''', metadata['ttl'], id, project, queue)
if not self.driver.affected:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
self.__update_claimed(id, metadata['ttl'])
def get(self, queue, claim_id, project):
if project is None:
project = ""
cid = utils.cid_decode(claim_id)
if cid is None:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
with self.driver("deferred"):
try:
id, ttl, age = self.driver.get(
"""
select C.id, C.ttl, julianday() * 86400.0 - C.created
from Queues as Q join Claims as C
on Q.id = C.qid
where C.ttl > julianday() * 86400.0 - C.created
and C.id = ? and project = ? and name = ?
""",
cid,
project,
queue,
)
return ({"id": claim_id, "ttl": ttl, "age": int(age)}, self.__get(id))
except utils.NoResult:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
def update(self, queue, claim_id, metadata, project):
if project is None:
project = ""
id = utils.cid_decode(claim_id)
if id is None:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
with self.driver("deferred"):
# still delay the cleanup here
self.driver.run(
"""
update Claims
set created = julianday() * 86400.0,
ttl = ?
where ttl > julianday() * 86400.0 - created
and id = ?
and qid = (select id from Queues
where project = ? and name = ?)
""",
metadata["ttl"],
id,
project,
queue,
)
if not self.driver.affected:
raise exceptions.ClaimDoesNotExist(claim_id, queue, project)
self.__update_claimed(id, metadata["ttl"])
def __delete_claimed(self, id, claim):
# Precondition: id exists in a specific queue
self.driver.run('''
delete from Messages
where id = ?
and id in (select msgid
from Claims join Locked
on id = cid
where ttl > julianday() * 86400.0 - created
and id = ?)
''', id, utils.cid_decode(claim))
if not self.driver.affected:
raise exceptions.ClaimNotPermitted(utils.msgid_encode(id), claim)
def delete(self, queue, claim_id, project):
if project is None:
project = ''
cid = utils.cid_decode(claim_id)
if cid is None:
return
self.driver.run('''
delete from Claims
where id = ?
and qid = (select id from Queues
where project = ? and name = ?)
''', cid, project, queue)
def delete(self, queue, claim_id, project):
if project is None:
project = ''
cid = utils.cid_decode(claim_id)
if cid is None:
return
self.driver.run('''
delete from Claims
where id = ?
and qid = (select id from Queues
where project = ? and name = ?)
''', cid, project, queue)
def delete(self, queue, claim_id, project):
if project is None:
project = ''
try:
cid = utils.cid_decode(claim_id)
except exceptions.MalformedID:
return
self.driver.run('''
delete from Claims
where id = ?
and qid = (select id from Queues
where project = ? and name = ?)
''', cid, project, queue)
def __delete_claimed(self, id, claim):
# Precondition: id exists in a specific queue
cid = utils.cid_decode(claim)
if cid is None:
return
self.driver.run('''
delete from Messages
where id = ?
and id in (select msgid
from Claims join Locked
on id = cid
where ttl > julianday() * 86400.0 - created
and id = ?)
''', id, cid)
if not self.driver.affected:
raise exceptions.MessageIsClaimedBy(id, claim)
def __delete_claimed(self, id, claim):
# Precondition: id exists in a specific queue
cid = utils.cid_decode(claim)
if cid is None:
return
self.driver.run(
'''
delete from Messages
where id = ?
and id in (select msgid
from Claims join Locked
on id = cid
where ttl > julianday() * 86400.0 - created
and id = ?)
''', id, cid)
if not self.driver.affected:
raise exceptions.MessageIsClaimedBy(id, claim)
