Package me.ahoo.cosid.snowflake

Class AbstractSnowflakeId

java.lang.Object

me.ahoo.cosid.snowflake.AbstractSnowflakeId

All Implemented Interfaces:

IdGenerator, SnowflakeId, Statistical, StringIdGenerator

Direct Known Subclasses:

MillisecondSnowflakeId, SecondSnowflakeId

public abstract class AbstractSnowflakeId
extends Object
implements SnowflakeId

Abstract SnowflakeId.

Field Summary

Fields

Modifier and Type	Field	Description
protected final long	epoch
protected long	lastTimestamp
protected final int	machineBit
protected final long	machineId	WARN:machineLeft greater than 30 will cause overflow, so machineId should be long when calculating.
protected final long	machineLeft
protected final int	maxMachineId
protected final long	maxSequence
protected final long	maxTimestamp
protected long	sequence
protected final int	sequenceBit
protected final int	timestampBit
protected final long	timestampLeft

Fields inherited from interface me.ahoo.cosid.snowflake.SnowflakeId

TOTAL_BIT

Constructor Summary

Constructors

Constructor	Description
AbstractSnowflakeId(long epoch, int timestampBit, int machineBit, int sequenceBit, int machineId, long sequenceResetThreshold)

Method Summary

Modifier and Type	Method	Description
long	generate()	Generate distributed ID.
protected abstract long	getCurrentTime()	get current timestamp.
long	getEpoch()
long	getLastTimestamp()
int	getMachineBit()
int	getMachineId()
int	getMaxMachineId()
long	getMaxSequence()
long	getMaxTimestamp()
int	getSequenceBit()
int	getTimestampBit()
protected long	nextTime()

Methods inherited from class java.lang.Object

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

Methods inherited from interface me.ahoo.cosid.IdGenerator

generateAsString, idConverter

Methods inherited from interface me.ahoo.cosid.snowflake.SnowflakeId

isSafeJavascript, stat

Field Details

epoch

protected final long epoch

timestampBit

protected final int timestampBit

machineBit

protected final int machineBit

sequenceBit

protected final int sequenceBit

maxTimestamp

protected final long maxTimestamp

maxSequence

protected final long maxSequence

maxMachineId

protected final int maxMachineId

machineLeft

protected final long machineLeft

timestampLeft

protected final long timestampLeft

machineId

protected final long machineId

WARN:machineLeft greater than 30 will cause overflow, so machineId should be long when calculating.

sequence

protected long sequence

lastTimestamp

protected long lastTimestamp

Constructor Details

AbstractSnowflakeId

public AbstractSnowflakeId(long epoch,
 int timestampBit,
 int machineBit,
 int sequenceBit,
 int machineId,
 long sequenceResetThreshold)

Method Details

nextTime

protected long nextTime()

getCurrentTime

protected abstract long getCurrentTime()

get current timestamp.

Returns:

current timestamp

generate

public long generate()

Description copied from interface: IdGenerator

Generate distributed ID.

Specified by:

generate in interface IdGenerator

Returns:

generated distributed ID

getEpoch

public long getEpoch()

Specified by:

getEpoch in interface SnowflakeId

getTimestampBit

public int getTimestampBit()

Specified by:

getTimestampBit in interface SnowflakeId

getMachineBit

public int getMachineBit()

Specified by:

getMachineBit in interface SnowflakeId

getSequenceBit

public int getSequenceBit()

Specified by:

getSequenceBit in interface SnowflakeId

getMaxTimestamp

public long getMaxTimestamp()

Specified by:

getMaxTimestamp in interface SnowflakeId

getMaxMachineId

public int getMaxMachineId()

Specified by:

getMaxMachineId in interface SnowflakeId

getMaxSequence

public long getMaxSequence()

Specified by:

getMaxSequence in interface SnowflakeId

getLastTimestamp

public long getLastTimestamp()

Specified by:

getLastTimestamp in interface SnowflakeId

getMachineId

public int getMachineId()

Specified by:

getMachineId in interface SnowflakeId