com.twitter.snowflake.sequence

类 BitsAllocator

java.lang.Object

com.twitter.snowflake.sequence.BitsAllocator

public class BitsAllocator
extends Object

Allocate 64 bits for the Unique ID(long)
sign (fixed 1bit) -> timestamp -> workerId -> sequence(within the same millisecond)

作者:

svili

字段概要

字段

限定符和类型	字段和说明
static int	TOTAL_BITS Total 64 bits

构造器概要

构造器

构造器和说明
BitsAllocator(int timestampBits, int workerIdBits, int sequenceBits) Constructor with timestampBits, workerIdBits, sequenceBits The highest bit used for sign, so 63 bits for timestampBits, workerIdBits, sequenceBits

方法概要

方法

限定符和类型	方法和说明
long	allocate(long deltaTime, long workerId, long sequence) Allocate bits for ID according to delta timestamp & workerId & sequence Note that: The highest bit will always be 0 for sign
long	getMaxDeltaTime()
long	getMaxSequence()
long	getMaxWorkerId()
int	getSequenceBits()
int	getSignBits() Getters
int	getTimestampBits()
int	getTimestampShift()
int	getWorkerIdBits()
int	getWorkerIdShift()

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

TOTAL_BITS

public static final int TOTAL_BITS

Total 64 bits

另请参阅:

常量字段值

构造器详细资料

BitsAllocator

public BitsAllocator(int timestampBits,
             int workerIdBits,
             int sequenceBits)

Constructor with timestampBits, workerIdBits, sequenceBits
The highest bit used for sign, so 63 bits for timestampBits, workerIdBits, sequenceBits

方法详细资料

allocate

public long allocate(long deltaTime,
            long workerId,
            long sequence)

Allocate bits for ID according to delta timestamp & workerId & sequence
Note that: The highest bit will always be 0 for sign

getSignBits

public int getSignBits()

Getters

getTimestampBits

public int getTimestampBits()

getWorkerIdBits

public int getWorkerIdBits()

getSequenceBits

public int getSequenceBits()

getMaxDeltaTime

public long getMaxDeltaTime()

getMaxWorkerId

public long getMaxWorkerId()

getMaxSequence

public long getMaxSequence()

getTimestampShift

public int getTimestampShift()

getWorkerIdShift

public int getWorkerIdShift()