org.apache.marmotta.kiwi.generator

Class SnowflakeIDGenerator

java.lang.Object

org.apache.marmotta.kiwi.generator.SnowflakeIDGenerator

All Implemented Interfaces:

IDGenerator

public class SnowflakeIDGenerator
extends Object
implements IDGenerator

Generate unique IDs using the Twitter Snowflake algorithm (see https://github.com/twitter/snowflake). Snowflake IDs are 64 bit positive longs composed of: - 41 bits time stamp - 10 bits machine id - 12 bits sequence number

Author:

Sebastian Schaffert (sschaffert@apache.org)

Constructor Summary

Constructors

Constructor and Description
SnowflakeIDGenerator(long datacenterId)

Method Summary

Methods

Modifier and Type	Method and Description
protected long	getDatacenterId()
long	getId() Return the next unique id for the type with the given name using the generator's id generation strategy.
void	shutdown() Shut down this id generator, performing any cleanups that might be necessary.
protected long	tilNextMillis(long lastTimestamp)

Methods inherited from class java.lang.Object

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

Constructor Detail

SnowflakeIDGenerator

public SnowflakeIDGenerator(long datacenterId)

Method Detail

tilNextMillis

protected long tilNextMillis(long lastTimestamp)

getDatacenterId

protected long getDatacenterId()
                        throws SocketException,
                               UnknownHostException

Throws:

SocketException

UnknownHostException

getId

public long getId()

Return the next unique id for the type with the given name using the generator's id generation strategy.

Specified by:

getId in interface IDGenerator

Returns:

shutdown

public void shutdown()

Shut down this id generator, performing any cleanups that might be necessary.

Specified by:

shutdown in interface IDGenerator