def _acquire(cls, uid, identity, stamp):
try:
log.debug('Create lock UID %s for %s', uid, identity)
lk = DBLock.from_dict(uid, {'identity': identity})
lk.save(force=True)
return lk
except RiakError as exc:
# TODO object shouldnt be cached before successful save
del DBLock._c.obj_cache[lk.key]
# check documentation for error message
# http://docs.basho.com/riak/latest/dev/advanced/strong-consistency/#Error-Messages
if 'failed' in str(exc):
lk = DBLock.get(uid)
log.debug('Lock %s already acquired by %s', uid, lk.identity)
return lk
raise
def _acquire(cls, uid, identity, stamp):
try:
log.debug(
'Create lock UID %s for %s', uid, identity)
lk = DBLock.from_dict(uid, {'identity': identity})
lk.save(force=True)
return lk
except RiakError as exc:
# TODO object shouldnt be cached before successful save
del DBLock._c.obj_cache[lk.key]
# check documentation for error message
# http://docs.basho.com/riak/latest/dev/advanced/strong-consistency/#Error-Messages
if 'failed' in str(exc):
lk = DBLock.get(uid)
log.debug('Lock %s already acquired by %s', uid, lk.identity)
return lk
raise
def _acquire(cls, uid, identity, stamp):
try:
del DBLock._c.obj_cache[uid]
except KeyError:
pass
_check = True
try:
lk = DBLock.get(uid)
except DBLayerNotFound:
log.debug(
'Create new lock UID %s for %s', uid, identity)
lk = DBLock.from_dict(uid, {})
lk.change_locking_state(identity, 1, stamp)
lk.save(force=True)
if len(lk.sum_all().keys()) != 1:
# concurrent create
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
log.debug("Concurrent lock %s create", uid)
else:
_check = False
if _check:
locking = lk.who_is_locking()
if locking is not None:
log.debug(
'Found lock with UID %s, owned by %s,'
' owner %r, lockers %s',
uid, locking, lk.am_i_locking(identity), lk.lockers)
return lk
else:
log.debug(
'Create lock UID %s for %s', uid, identity)
lk.change_locking_state(identity, 1, stamp)
lk.save(force=True)
summed = lk.sum_all()
if len(summed.keys()) != 1:
log.debug("More than one acquire")
if identity in summed:
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
log.debug("I may be not locking, so removing me %s", identity)
return lk
def _acquire(cls, uid, identity, stamp):
try:
del DBLock._c.obj_cache[uid]
except KeyError:
pass
_check = True
try:
lk = DBLock.get(uid)
except DBLayerNotFound:
log.debug('Create new lock UID %s for %s', uid, identity)
lk = DBLock.from_dict(uid, {})
lk.change_locking_state(identity, 1, stamp)
lk.save(force=True)
if len(lk.sum_all().keys()) != 1:
# concurrent create
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
log.debug("Concurrent lock %s create", uid)
else:
_check = False
if _check:
locking = lk.who_is_locking()
if locking is not None:
log.debug(
'Found lock with UID %s, owned by %s,'
' owner %r, lockers %s', uid, locking,
lk.am_i_locking(identity), lk.lockers)
return lk
else:
log.debug('Create lock UID %s for %s', uid, identity)
lk.change_locking_state(identity, 1, stamp)
lk.save(force=True)
summed = lk.sum_all()
if len(summed.keys()) != 1:
log.debug("More than one acquire")
if identity in summed:
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
log.debug("I may be not locking, so removing me %s", identity)
return lk
def _release(cls, uid, identity, stamp):
log.debug("Release lock %s with %s", uid, identity)
lk = DBLock.get(uid)
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
def _release(cls, uid, identity):
lk = DBLock.get(uid)
log.debug('Release lock %s with %s', uid, identity)
lk.delete()
def _release(cls, uid, identity, stamp):
log.debug("Release lock %s with %s", uid, identity)
lk = DBLock.get(uid)
lk.change_locking_state(identity, -1, stamp)
lk.save(force=True)
def _release(cls, uid, identity):
lk = DBLock.get(uid)
log.debug('Release lock %s with %s', uid, identity)
lk.delete()
