def acquire(self):
"""Renew an existing lock, or acquire a new one.
The old lock must have already been released if shard_num is specified.
client.NotFound may be raised if the log contains no entries.
"""
log.debug('acquire lock')
with self.lock:
now = time.time()
client.lock_shard(self.conn, self.type, self.shard_num,
self.zone_id, self.timeout, self.locker_id)
self.last_locked = now
def acquire_log_lock(self, lock_id, zone_id, shard_num):
log.debug('acquiring lock on shard %d', shard_num)
try:
client.lock_shard(self.source_conn, self._type, shard_num, zone_id,
self.log_lock_time, self.local_lock_id)
except client.HttpError as e:
log.error('locking shard %d in zone %s failed: %s',
shard_num, zone_id, e)
# clear this flag for the next pass
self.relock_log = False
raise
# twiddle the boolean flag to false
self.relock_log = False
# then start the timer to twiddle it back to true
self.relock_timer = threading.Timer(0.5 * self.log_lock_time, \
self.flip_log_lock)
self.relock_timer.start()
def _acquire(self):
# same as aqcuire() but assumes self.lock is held
now = time.time()
client.lock_shard(self.conn, self.type, self.shard_num, self.zone_id,
self.timeout, self.locker_id)
self.last_locked = now
def _acquire(self):
# same as aqcuire() but assumes self.lock is held
now = time.time()
client.lock_shard(self.conn, self.type, self.shard_num,
self.zone_id, self.timeout, self.locker_id)
self.last_locked = now
