Package org.apache.hadoop.hdfs.util

Class ConstEnumCounters<E extends java.lang.Enum<E>>

java.lang.Object

org.apache.hadoop.hdfs.util.EnumCounters<E>

org.apache.hadoop.hdfs.util.ConstEnumCounters<E>

public class ConstEnumCounters<E extends java.lang.Enum<E>>
extends EnumCounters<E>

Const Counters for an enum type. It's the const version of EnumCounters. Any modification ends with a ConstEnumException.

See Also:

EnumCounters

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ConstEnumCounters.ConstEnumException	An exception class for modification on ConstEnumCounters.

Constructor Summary

Constructors

Constructor	Description
ConstEnumCounters(java.lang.Class<E> enumClass, long defaultVal)

Method Summary

Modifier and Type	Method	Description
void	add(E e, long value)	Add the given value to counter e.
void	add(EnumCounters<E> that)	Add that counters to this counters.
void	negation()	Negate all counters.
void	reset()	Reset all counters to zero.
void	reset(long val)
void	set(E e, long value)	Set counter e to the given value.
void	set(EnumCounters<E> that)	Set this counters to that counters.
void	subtract(E e, long value)	Subtract the given value from counter e.
void	subtract(EnumCounters<E> that)	Subtract this counters from that counters.

Methods inherited from class org.apache.hadoop.hdfs.util.EnumCounters

allLessOrEqual, anyGreaterOrEqual, asArray, deepCopyEnumCounter, equals, get, hashCode, sum, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstEnumCounters

public ConstEnumCounters(java.lang.Class<E> enumClass,
                         long defaultVal)

Method Detail

negation

public final void negation()

Description copied from class: EnumCounters

Negate all counters.

Overrides:

negation in class EnumCounters<E extends java.lang.Enum<E>>

set

public final void set(E e,
                      long value)

Description copied from class: EnumCounters

Set counter e to the given value.

Overrides:

set in class EnumCounters<E extends java.lang.Enum<E>>

set

public final void set(EnumCounters<E> that)

Description copied from class: EnumCounters

Set this counters to that counters.

Overrides:

set in class EnumCounters<E extends java.lang.Enum<E>>

reset

public final void reset()

Description copied from class: EnumCounters

Reset all counters to zero.

Overrides:

reset in class EnumCounters<E extends java.lang.Enum<E>>

add

public final void add(E e,
                      long value)

Description copied from class: EnumCounters

Add the given value to counter e.

Overrides:

add in class EnumCounters<E extends java.lang.Enum<E>>

add

public final void add(EnumCounters<E> that)

Description copied from class: EnumCounters

Add that counters to this counters.

Overrides:

add in class EnumCounters<E extends java.lang.Enum<E>>

subtract

public final void subtract(E e,
                           long value)

Description copied from class: EnumCounters

Subtract the given value from counter e.

Overrides:

subtract in class EnumCounters<E extends java.lang.Enum<E>>

subtract

public final void subtract(EnumCounters<E> that)

Description copied from class: EnumCounters

Subtract this counters from that counters.

Overrides:

subtract in class EnumCounters<E extends java.lang.Enum<E>>

reset

public final void reset(long val)

Overrides:

reset in class EnumCounters<E extends java.lang.Enum<E>>