org.apache.shardingsphere.core.strategy.keygen

类 SnowflakeShardingKeyGenerator

java.lang.Object

org.apache.shardingsphere.core.strategy.keygen.SnowflakeShardingKeyGenerator

所有已实现的接口:

ShardingKeyGenerator, org.apache.shardingsphere.spi.TypeBasedSPI

public final class SnowflakeShardingKeyGenerator
extends Object
implements ShardingKeyGenerator

Snowflake distributed primary key generator.

Use snowflake algorithm. Length is 64 bit.

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

Call @SnowflakeShardingKeyGenerator.setWorkerId to set worker id, default value is 0.

Call @SnowflakeShardingKeyGenerator.setMaxTolerateTimeDifferenceMilliseconds to set max tolerate time difference milliseconds, default value is 0.

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
SnowflakeShardingKeyGenerator()

方法概要

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

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.TypeBasedSPI

getProperties, setProperties

字段详细资料

EPOCH

public static final long EPOCH

构造器详细资料

SnowflakeShardingKeyGenerator

public SnowflakeShardingKeyGenerator()

方法详细资料

getType

public String getType()

指定者:

getType 在接口中 org.apache.shardingsphere.spi.TypeBasedSPI

generateKey

public Comparable<?> generateKey()

指定者:

generateKey 在接口中 ShardingKeyGenerator