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java.lang.Objectorg.apache.hadoop.mapreduce.Counter
public class Counter
A named counter that tracks the progress of a map/reduce job.
Counters represent global counters, defined either by the
Map-Reduce framework or applications. Each Counter is named by
an Enum and has a long for the value.
Counters are bunched into Groups, each comprising of
counters from a particular Enum class.
| Constructor Summary | |
|---|---|
protected |
Counter()
|
protected |
Counter(String name,
String displayName)
|
| Method Summary | |
|---|---|
boolean |
equals(Object genericRight)
|
String |
getDisplayName()
Get the name of the counter. |
String |
getName()
|
long |
getValue()
What is the current value of this counter? |
int |
hashCode()
|
void |
increment(long incr)
Increment this counter by the given value |
void |
readFields(DataInput in)
Read the binary representation of the counter |
protected void |
setDisplayName(String displayName)
Deprecated. |
void |
setValue(long value)
Set this counter by the given value |
void |
write(DataOutput out)
Write the binary representation of the counter |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
protected Counter()
protected Counter(String name,
String displayName)
| Method Detail |
|---|
@Deprecated protected void setDisplayName(String displayName)
public void readFields(DataInput in)
throws IOException
readFields in interface Writablein - DataInput to deseriablize this object from.
IOException
public void write(DataOutput out)
throws IOException
write in interface Writableout - DataOuput to serialize this object into.
IOExceptionpublic String getName()
public String getDisplayName()
public long getValue()
public void setValue(long value)
value - the value to setpublic void increment(long incr)
incr - the value to increase this counter bypublic boolean equals(Object genericRight)
equals in class Objectpublic int hashCode()
hashCode in class Object
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