org.apache.hadoop.mapred

Class Counters.Counter

java.lang.Object

org.apache.hadoop.mapred.Counters.Counter

All Implemented Interfaces:

Writable, Counter

Enclosing class:

Counters

@InterfaceAudience.Public
@InterfaceStability.Stable
public static class Counters.Counter
extends Object
implements Counter

A counter record, comprising its name and value.

Constructor Summary

Constructors

Constructor and Description
Counters.Counter()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contentEquals(Counters.Counter counter) Deprecated.
boolean	equals(Object genericRight)
long	getCounter()
String	getDisplayName() Get the display name of the counter.
String	getName()
Counter	getUnderlyingCounter()
long	getValue() What is the current value of this counter?
int	hashCode()
void	increment(long incr) Increment this counter by the given value
String	makeEscapedCompactString() Returns the compact stringified version of the counter in the format [(actual-name)(display-name)(value)]
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	setDisplayName(String displayName) Set the display name of the counter
void	setValue(long value) Set this counter by the given value
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

Counters.Counter

public Counters.Counter()

Method Detail

setDisplayName

public void setDisplayName(String displayName)

Description copied from interface: Counter

Set the display name of the counter

Specified by:

setDisplayName in interface Counter

Parameters:

displayName - of the counter

getName

public String getName()

Specified by:

getName in interface Counter

Returns:

the name of the counter

getDisplayName

public String getDisplayName()

Description copied from interface: Counter

Get the display name of the counter.

Specified by:

getDisplayName in interface 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?

Specified by:

getValue in interface Counter

Returns:

the current value

setValue

public void setValue(long value)

Description copied from interface: Counter

Set this counter by the given value

Specified by:

setValue in interface Counter

Parameters:

value - the value to set

increment

public void increment(long incr)

Description copied from interface: Counter

Increment this counter by the given value

Specified by:

increment in interface Counter

Parameters:

incr - the value to increase this counter by

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

makeEscapedCompactString

public String makeEscapedCompactString()

Returns the compact stringified version of the counter in the format [(actual-name)(display-name)(value)]

Returns:

the stringified result

contentEquals

@Deprecated
public boolean contentEquals(Counters.Counter counter)

Deprecated.

Checks for (content) equality of two (basic) counters

Parameters:

counter - to compare

Returns:

true if content equals

getCounter

public long getCounter()

Returns:

the value of the counter

getUnderlyingCounter

public Counter getUnderlyingCounter()

equals

public boolean equals(Object genericRight)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object