io.polaris.core.guid

类 Snowflake

java.lang.Object

io.polaris.core.guid.Snowflake

public class Snowflake
extends Object

参考: https://github.com/downgoon/snowflake/blob/master/docs/SnowflakeTutorial_zh_CN.md

https://github.com/downgoon/snowflake

从以下版本开始:

1.8

作者:

Qt

构造器概要

构造器

构造器和说明
Snowflake(long serverId) datacenterId + workerId [0,1023]
Snowflake(long datacenterId, long workerId)

方法概要

限定符和类型	方法和说明
String	formatId(long id) extract and display time stamp, datacenterId, workerId and sequence number information from the given id in humanization format
long	getEpoch()
long	getWaitCount()
long	nextId() generate an unique and incrementing id
long[]	parseId(long id) extract time stamp, datacenterId, workerId and sequence number information from the given id
protected long	timestampGen() get current time stamp
String	toString() show settings of Snowflake
protected long	waitNextMillis(long currTimestamp) running loop blocking until next millisecond

从类继承的方法 java.lang.Object

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

构造器详细资料

Snowflake

public Snowflake(long datacenterId,
                 long workerId)

参数:

datacenterId - data center number the process running on, value range: [0,31]

workerId - machine or process number, value range: [0,31]

Snowflake

public Snowflake(long serverId)

datacenterId + workerId [0,1023]

参数:

serverId -

方法详细资料

nextId

public long nextId()

generate an unique and incrementing id

返回:

id

getWaitCount

public long getWaitCount()

返回:

the amount of calling waitNextMillis(long) method

waitNextMillis

protected long waitNextMillis(long currTimestamp)

running loop blocking until next millisecond

参数:

currTimestamp - current time stamp

返回:

current time stamp in millisecond

timestampGen

protected long timestampGen()

get current time stamp

返回:

current time stamp in millisecond

toString

public String toString()

show settings of Snowflake

覆盖:

toString 在类中 Object

getEpoch

public long getEpoch()

parseId

public long[] parseId(long id)

extract time stamp, datacenterId, workerId and sequence number information from the given id

参数:

id - a snowflake id generated by this object

返回:

an array containing time stamp, datacenterId, workerId and sequence number

formatId

public String formatId(long id)

extract and display time stamp, datacenterId, workerId and sequence number information from the given id in humanization format

参数:

id - snowflake id in Long format

返回:

snowflake id in String format