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.instance.InstanceContextAware, org.apache.shardingsphere.infra.util.spi.lifecycle.SPIPostProcessor, org.apache.shardingsphere.infra.util.spi.type.required.RequiredSPI, org.apache.shardingsphere.infra.util.spi.type.typed.TypedSPI, KeyGenerateAlgorithm

public final class SnowflakeKeyGenerateAlgorithm
extends Object
implements KeyGenerateAlgorithm, org.apache.shardingsphere.infra.instance.InstanceContextAware

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
Long	generateKey()
String	getType()
void	init(Properties props)
boolean	isDefault()
void	setInstanceContext(org.apache.shardingsphere.infra.instance.InstanceContext instanceContext)

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.infra.config.algorithm.ShardingSphereAlgorithm

getProps

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

getTypeAliases

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(Properties props)

指定者:

init 在接口中 org.apache.shardingsphere.infra.util.spi.lifecycle.SPIPostProcessor

setInstanceContext

public void setInstanceContext(org.apache.shardingsphere.infra.instance.InstanceContext instanceContext)

指定者:

setInstanceContext 在接口中 org.apache.shardingsphere.infra.instance.InstanceContextAware

generateKey

public Long 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.infra.util.spi.type.typed.TypedSPI

isDefault

public boolean isDefault()

指定者:

isDefault 在接口中 org.apache.shardingsphere.infra.util.spi.type.required.RequiredSPI