org.apache.hadoop.util

Class SequentialNumber

java.lang.Object

org.apache.hadoop.util.SequentialNumber

Direct Known Subclasses:

GenerationStamp, INodeId, SequentialBlockIdGenerator

@InterfaceAudience.Private
public abstract class SequentialNumber
extends Object

Sequential number generator. This class is thread safe.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SequentialNumber(long initialValue) Create a new instance with the given initial value.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object that)
long	getCurrentValue()
int	hashCode()
long	nextValue() Increment and then return the next value.
void	setCurrentValue(long value) Set current value.
void	skipTo(long newValue) Skip to the new value.

Methods inherited from class java.lang.Object

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

Constructor Detail

SequentialNumber

protected SequentialNumber(long initialValue)

Create a new instance with the given initial value.

Method Detail

getCurrentValue

public long getCurrentValue()

Returns:

the current value.

setCurrentValue

public void setCurrentValue(long value)

Set current value.

nextValue

public long nextValue()

Increment and then return the next value.

skipTo

public void skipTo(long newValue)
            throws IllegalStateException

Skip to the new value.

Throws:

IllegalStateException

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object