com.relops.snowflake

Class Snowflake

java.lang.Object

com.relops.snowflake.Snowflake

public class Snowflake
extends Object

A snowflake is a source of k-ordered unique 64-bit integers.

Field Summary

Fields

Modifier and Type	Field and Description
static short	MAX_NODE
static short	MAX_SEQUENCE
static int	NODE_SHIFT
static int	SEQ_SHIFT

Constructor Summary

Constructors

Constructor and Description
Snowflake(int node) A snowflake is designed to operate as a singleton instance within the context of a node.

Method Summary

Methods

Modifier and Type	Method and Description
long	next() Generates a k-ordered unique 64-bit integer.

Methods inherited from class java.lang.Object

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

Field Detail

NODE_SHIFT

public static final int NODE_SHIFT

See Also:

Constant Field Values

SEQ_SHIFT

public static final int SEQ_SHIFT

See Also:

Constant Field Values

MAX_NODE

public static final short MAX_NODE

See Also:

Constant Field Values

MAX_SEQUENCE

public static final short MAX_SEQUENCE

See Also:

Constant Field Values

Constructor Detail

Snowflake

public Snowflake(int node)

A snowflake is designed to operate as a singleton instance within the context of a node. If you deploy different nodes, supplying a unique node id will guarantee the uniqueness of ids generated concurrently on different nodes.

Parameters:

node - This is an id you use to differentiate different nodes.

Method Detail

next

public long next()

Generates a k-ordered unique 64-bit integer. Subsequent invocations of this method will produce increasing integer values.

Returns:

The next 64-bit integer.