def snowflake(datacenterId, workerId, epoch):
global lastTimestamp, sequence, sequenceMask
datacenterId = datacenterId & datacenterIdBits
workerId = workerId & workerIdBits
timestamp = get_timestamp()
if (timestamp < lastTimestamp):
raise "Clock moved backwards"
if (timestamp == lastTimestamp):
sequence = (sequence + 1) & sequenceMask
if (sequence == 0):
timestamp = til_next_millis(lastTimestamp)
else:
sequence = 0
lastTimestamp = timestamp
timestamp = timestamp - (int(epoch*1000))
guoidValue = (timestamp << timestampLeftShift) |\
(datacenterId << datacenterIdShift) |\
(workerId << workerIdShift) |\
sequence
return guoidValue
def next(self, logical_shard_id):
timestamp = get_timestamp()
if (timestamp < self.last_timestamp):
raise "Clock moved backwards"
if (timestamp == self.last_timestamp):
self.sequence = (self.sequence + 1) & Config.SEQUENCE_MASK
if (self.sequence == 0):
timestamp = til_next_millis(self.last_timestamp)
else:
self.sequence = 0
self.last_timestamp = timestamp
timestamp = timestamp - (int(self.epoch)*1000)
guoidValue = (timestamp << Config.TIMESTAMP_LEFT_SHIFT) |\
(logical_shard_id << Config.LOGICAL_SHARD_ID_SHIFT) | self.sequence
return guoidValue
def next(self):
timestamp = get_timestamp()
if (timestamp < self.last_timestamp):
raise "Clock moved backwards"
if (timestamp == self.last_timestamp):
self.sequence = (self.sequence + 1) & Config.SEQUENCE_MASK
if (self.sequence == 0):
timestamp = til_next_millis(self.last_timestamp)
else:
self.sequence = 0
self.last_timestamp = timestamp
timestamp = timestamp - (int(self.epoch*1000))
guoidValue = (timestamp << Config.TIMESTAMP_LEFT_SHIFT) |\
(self.datacenter_id | (self.worker_id) | self.sequence)
return guoidValue
def instagram(id, epoch):
global lastTimestamp, sequence, sequenceMask
global logicalShardIdMask, logicalShardIdBits
timestamp = get_timestamp()
if (timestamp < lastTimestamp):
raise "Clock moved backwards"
if (timestamp == lastTimestamp):
sequence = (sequence + 1) & sequenceMask
if (sequence == 0):
timestamp = til_next_millis(lastTimestamp)
else:
sequence = 0
logicalShardId = getUserLogicalShardId(id)
lastTimestamp = timestamp
timestamp = timestamp - (int(epoch)*1000)
guoidValue = (timestamp << timestampLeftShift) |\
(logicalShardId << logicalShardIdShift) |\
sequence
return guoidValue
