org.apache.shardingsphere.sharding.algorithm.keygen

类 SnowflakeKeyGenerateAlgorithm

java.lang.Object

org.apache.shardingsphere.sharding.algorithm.keygen.SnowflakeKeyGenerateAlgorithm

所有已实现的接口:

org.apache.shardingsphere.infra.config.algorithm.ShardingSphereAlgorithm, org.apache.shardingsphere.infra.config.algorithm.ShardingSphereAlgorithmPostProcessor, KeyGenerateAlgorithm, org.apache.shardingsphere.spi.required.RequiredSPI, org.apache.shardingsphere.spi.typed.TypedSPI

public final class SnowflakeKeyGenerateAlgorithm
extends Object
implements KeyGenerateAlgorithm

Snowflake key generate algorithm.

     Length of key is 64 bit.
     1 bit sign bit.
     41 bits timestamp offset from 2016.11.01(ShardingSphere distributed primary key published data) to now.
     10 bits worker process id.
     12 bits auto increment offset in one mills
 

字段概要

字段

限定符和类型	字段和说明
static long	EPOCH

构造器概要

构造器

构造器和说明
SnowflakeKeyGenerateAlgorithm()

方法概要

限定符和类型	方法和说明
Comparable<?>	generateKey()
String	getType()
void	init()
boolean	isDefault()

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.shardingsphere.spi.typed.TypedSPI

getProps, setProps

字段详细资料

EPOCH

public static final long EPOCH

构造器详细资料

SnowflakeKeyGenerateAlgorithm

public SnowflakeKeyGenerateAlgorithm()

方法详细资料

init

public void init()

指定者:

init 在接口中 org.apache.shardingsphere.infra.config.algorithm.ShardingSphereAlgorithmPostProcessor

generateKey

public Comparable<?> generateKey()

指定者:

generateKey 在接口中 KeyGenerateAlgorithm

getType

public String getType()

指定者:

getType 在接口中 org.apache.shardingsphere.spi.typed.TypedSPI

isDefault

public boolean isDefault()

指定者:

isDefault 在接口中 org.apache.shardingsphere.spi.required.RequiredSPI