def add_lock(self, clientId, lock, locktype, mid):
'''
First check if the lock already exists
'''
indx = get_hash_index(lock, MAX_PARTITIONS, BITWISEAND)
alllocks = self.alllocks[indx]
partlock = self.partitionlock[indx]
with partlock:
if lock in alllocks:
lck = alllocks[lock]
ret = self.check_existing_lock(lck, clientId, locktype)
if ret == StatusMsg.WRITE_LOCK_QUEUED or ret == StatusMsg.READ_LOCK_QUEUED:
if clientId not in self.clientlocks:
self.clientlocks[clientId] = {}
self.clientlocks[clientId][lock] = (lck, mid)
else:
'''We need to send the response now!!!!'''
response = get_Response_msg(mid, ret)
eobj = event(common.RESPONSE_TOPIC, (clientId, response))
self.ebus.post(eobj)
return ret
'''
Lock doesn't exist, get the new lock
'''
logging.debug('Client ' + clientId + ' taking the new lock ' +
lock + ' ' + str(locktype))
lck = LockDef(lock, clientId, locktype)
alllocks[lock] = lck
if clientId not in self.clientlocks:
self.clientlocks[clientId] = {}
self.clientlocks[clientId][lock] = (lck, mid)
response = get_Response_msg(mid, StatusMsg.LOCK_GRANTED)
eobj = event(common.RESPONSE_TOPIC, (clientId, response))
self.ebus.post(eobj)
return StatusMsg.SUCCESS
def add_lock(self, clientId, lock, locktype, mid):
'''
First check if the lock already exists
'''
indx = get_hash_index(lock, MAX_PARTITIONS, BITWISEAND)
alllocks = self.alllocks[indx]
partlock = self.partitionlock[indx]
with partlock:
if lock in alllocks:
lck = alllocks[lock]
ret = self.check_existing_lock(lck, clientId, locktype)
if ret == StatusMsg.WRITE_LOCK_QUEUED or ret == StatusMsg.READ_LOCK_QUEUED:
if clientId not in self.clientlocks:
self.clientlocks[clientId] = {}
self.clientlocks[clientId][lock] = (lck, mid)
else:
'''We need to send the response now!!!!'''
response = get_Response_msg(mid, ret)
eobj = event(common.RESPONSE_TOPIC, (clientId, response))
self.ebus.post(eobj)
return ret
'''
Lock doesn't exist, get the new lock
'''
logging.debug('Client ' + clientId + ' taking the new lock ' + lock + ' ' + str(locktype))
lck = LockDef(lock, clientId, locktype)
alllocks[lock] = lck
if clientId not in self.clientlocks:
self.clientlocks[clientId] = {}
self.clientlocks[clientId][lock] = (lck , mid)
response = get_Response_msg(mid, StatusMsg.LOCK_GRANTED)
eobj = event(common.RESPONSE_TOPIC, (clientId, response))
self.ebus.post(eobj)
return StatusMsg.SUCCESS
def getLockDetails(self, lock):
'''
Returns the details of the lock with the name 'lock'
it will return FAIL status message if the lock is not found
in this lock container
'''
logging.debug('Trying to get LockDetails for ' + lock)
retval = LockDetails()
retval.lockName = lock
indx = get_hash_index(lock, MAX_PARTITIONS, BITWISEAND)
partlock = None
partallocks = None
self.biglock.acquire()
with self.biglock:
if indx not in self.alllocks:
retval.sm.sv = StatusMsg.FAIL
return retval
partlock = self.partitionlock[indx]
partallocks = self.alllocks[indx]
partlock.acquire()
if lock in partallocks:
lck = partallocks[lock]
if lck.writeLocker is not None:
retval.currentWriter = lck.writeLocker
retval.currentReaders.extend(lck.readers)
retval.currentWriteWaits.extend(lck.write_waits)
if lck.locktype == LockOperation.WRITELOCK:
retval.lockType = 'WRITE'
else:
retval.lockType = 'READ'
partlock.release()
if retval is None:
logging.debug('Lock details not found' + lock)
retval.sm.sv = StatusMsg.FAIL
else:
retval.sm.sv = StatusMsg.SUCCESS
logging.debug('Lock details ' + str(retval))
return retval
def getLockDetails(self, lock):
'''
Returns the details of the lock with the name 'lock'
it will return FAIL status message if the lock is not found
in this lock container
'''
logging.debug('Trying to get LockDetails for ' + lock)
retval = LockDetails()
retval.lockName = lock
indx = get_hash_index(lock, MAX_PARTITIONS, BITWISEAND)
partlock = None
partallocks = None
self.biglock.acquire()
with self.biglock:
if indx not in self.alllocks:
retval.sm.sv = StatusMsg.FAIL
return retval
partlock = self.partitionlock[indx]
partallocks = self.alllocks[indx]
partlock.acquire()
if lock in partallocks:
lck = partallocks[lock]
if lck.writeLocker is not None:
retval.currentWriter = lck.writeLocker
retval.currentReaders.extend(lck.readers)
retval.currentWriteWaits.extend(lck.write_waits)
if lck.locktype == LockOperation.WRITELOCK:
retval.lockType = 'WRITE'
else:
retval.lockType = 'READ'
partlock.release()
if retval is None:
logging.debug('Lock details not found' + lock)
retval.sm.sv = StatusMsg.FAIL
else:
retval.sm.sv = StatusMsg.SUCCESS
logging.debug('Lock details ' + str(retval))
return retval
