org.apache.pig.impl.plan

Class NodeIdGenerator

java.lang.Object

org.apache.pig.impl.plan.NodeIdGenerator

public class NodeIdGenerator
extends Object

Generates IDs as long values in a thread safe manner. Each thread has its own generated IDs.

Method Summary

Modifier and Type	Method and Description
static NodeIdGenerator	getGenerator() Returns the NodeIdGenerator singleton.
long	getNextNodeId(String scope) Returns the next ID to be used for the current Thread.
static void	reset() Reset all scope IDs to 0 for the current Thread.
static void	reset(String scope) Reset the given scope IDs to 0 for the current Thread.

Methods inherited from class java.lang.Object

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

Method Detail

getGenerator

public static NodeIdGenerator getGenerator()

Returns the NodeIdGenerator singleton.

Returns:

getNextNodeId

public long getNextNodeId(String scope)

Returns the next ID to be used for the current Thread.

Parameters:

scope -

Returns:

reset

public static void reset(String scope)

Reset the given scope IDs to 0 for the current Thread.

Parameters:

scope -

reset

public static void reset()

Reset all scope IDs to 0 for the current Thread.