me.ahoo.cosid.snowflake

Class SafeJavaScriptSnowflakeId

java.lang.Object

me.ahoo.cosid.snowflake.SafeJavaScriptSnowflakeId

public final class SafeJavaScriptSnowflakeId
extends java.lang.Object

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

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
SafeJavaScriptSnowflakeId()

Method Summary

Modifier and Type	Method and Description
static boolean	isSafeJavaScript(long id)
static MillisecondSnowflakeId	ofMillisecond(long 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, long machineId, long sequenceResetThreshold)
static SecondSnowflakeId	ofSecond(long machineId) Max Sequence (19 bits) = (1<<19) = 524288 (TPS).
static SecondSnowflakeId	ofSecond(long epoch, int timestampBit, int machineBit, int sequenceBit, long machineId, long sequenceResetThreshold)

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

SafeJavaScriptSnowflakeId

public SafeJavaScriptSnowflakeId()

Method Detail

isSafeJavaScript

public static boolean isSafeJavaScript(long id)

ofMillisecond

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

ofMillisecond

public static MillisecondSnowflakeId ofMillisecond(long 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,
                                         long machineId,
                                         long sequenceResetThreshold)

ofSecond

public static SecondSnowflakeId ofSecond(long 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