org.apache.hadoop.mapreduce.counters

Class GenericCounter

java.lang.Object

org.apache.hadoop.mapreduce.counters.AbstractCounter

org.apache.hadoop.mapreduce.counters.GenericCounter

All Implemented Interfaces:

org.apache.hadoop.io.Writable, Counter

@InterfaceAudience.Private
public class GenericCounter
extends AbstractCounter

A generic counter implementation

Constructor Summary

Constructors

Constructor and Description
GenericCounter()
GenericCounter(String name, String displayName)
GenericCounter(String name, String displayName, long value)

Method Summary

Methods

Modifier and Type	Method and Description
String	getDisplayName() Get the display name of the counter.
String	getName()
Counter	getUnderlyingCounter()
long	getValue() What is the current value of this counter?
void	increment(long incr) Increment this counter by the given value
void	readFields(DataInput in)
void	setDisplayName(String displayName) Deprecated.
void	setValue(long value) Set this counter by the given value
void	write(DataOutput out) GenericCounter ::= keyName isDistinctDisplayName [displayName] value

Methods inherited from class org.apache.hadoop.mapreduce.counters.AbstractCounter

equals, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericCounter

public GenericCounter()

GenericCounter

public GenericCounter(String name,
              String displayName)

GenericCounter

public GenericCounter(String name,
              String displayName,
              long value)

Method Detail

setDisplayName

@Deprecated
public void setDisplayName(String displayName)

Deprecated.

Description copied from interface: Counter

Set the display name of the counter

Specified by:

setDisplayName in interface Counter

Overrides:

setDisplayName in class AbstractCounter

Parameters:

displayName - of the counter

readFields

public void readFields(DataInput in)
                throws IOException

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

GenericCounter ::= keyName isDistinctDisplayName [displayName] value

Throws:

IOException

getName

public String getName()

Returns:

the name of the counter

getDisplayName

public String getDisplayName()

Description copied from interface: Counter

Get the display name of the counter.

Returns:

the user facing name of the counter

getValue

public long getValue()

Description copied from interface: Counter

What is the current value of this counter?

Returns:

the current value

setValue

public void setValue(long value)

Description copied from interface: Counter

Set this counter by the given value

Parameters:

value - the value to set

increment

public void increment(long incr)

Description copied from interface: Counter

Increment this counter by the given value

Parameters:

incr - the value to increase this counter by

getUnderlyingCounter

public Counter getUnderlyingCounter()