Package me.ahoo.cosid.snowflake

Class SafeJavaScriptSnowflakeId

java.lang.Object

me.ahoo.cosid.snowflake.SafeJavaScriptSnowflakeId

public final class SafeJavaScriptSnowflakeId
extends Object

Safe JavaScript Number ID. Number.MAX_SAFE_INTEGER = 9007199254740991 Math.log2(Number.MAX_SAFE_INTEGER) = 53

Field Summary

Fields

Modifier and Type	Field	Description
static final long	JAVA_SCRIPT_MAX_SAFE_NUMBER
static final int	JAVA_SCRIPT_MAX_SAFE_NUMBER_BIT

Constructor Summary

Constructors

Constructor	Description
SafeJavaScriptSnowflakeId()

Method Summary

Modifier and Type	Method	Description
static boolean	isSafeJavaScript(long id)
static MillisecondSnowflakeId	ofMillisecond(int machineId)	Max Sequence (9 bits) = ((1<<)*1000) = 512000 (TPS) Max Machine (3 bits) = 1<<3 = 8 Max Timestamp = 2199023255551 ms ~~ 69.7 years
static MillisecondSnowflakeId	ofMillisecond(long epoch, int timestampBit, int machineBit, int sequenceBit, int machineId, long sequenceResetThreshold)
static SecondSnowflakeId	ofSecond(int machineId)	Max Sequence (19 bits) = (1<<19) = 524288 (TPS).
static SecondSnowflakeId	ofSecond(long epoch, int timestampBit, int machineBit, int sequenceBit, int machineId, long sequenceResetThreshold)

Methods inherited from class java.lang.Object

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

Field Details

JAVA_SCRIPT_MAX_SAFE_NUMBER_BIT

public static final int JAVA_SCRIPT_MAX_SAFE_NUMBER_BIT

See Also:

• Constant Field Values

JAVA_SCRIPT_MAX_SAFE_NUMBER

public static final long JAVA_SCRIPT_MAX_SAFE_NUMBER

See Also:

• Constant Field Values

Constructor Details

SafeJavaScriptSnowflakeId

public SafeJavaScriptSnowflakeId()

Method Details

isSafeJavaScript

public static boolean isSafeJavaScript(long id)

ofMillisecond

public static MillisecondSnowflakeId ofMillisecond(long epoch,
 int timestampBit,
 int machineBit,
 int sequenceBit,
 int machineId,
 long sequenceResetThreshold)

ofMillisecond

public static MillisecondSnowflakeId ofMillisecond(int machineId)

Max Sequence (9 bits) = ((1<<)*1000) = 512000 (TPS) Max Machine (3 bits) = 1<<3 = 8 Max Timestamp = 2199023255551 ms ~~ 69.7 years

Parameters:

machineId - 服务实例编号

Returns:

MillisecondSnowflakeId

ofSecond

public static SecondSnowflakeId ofSecond(long epoch,
 int timestampBit,
 int machineBit,
 int sequenceBit,
 int machineId,
 long sequenceResetThreshold)

ofSecond

public static SecondSnowflakeId ofSecond(int machineId)

Max Sequence (19 bits) = (1<<19) = 524288 (TPS). Max Machine (3 bits) = 1<<3 = 8 Max Timestamp = 2147483647 s ~~ 68 years

Parameters:

machineId - 服务实例编号

Returns:

SecondSnowflakeId