org.apache.hadoop.mapred

类 Counters.Group

java.lang.Object

org.apache.hadoop.mapred.Counters.Group

所有已实现的接口:

Iterable<Counters.Counter>, Writable

封闭类:

Counters

public class Counters.Group
extends Object
implements Writable, Iterable<Counters.Counter>

Group of counters, comprising of counters from a particular counter Enum class.

Grouphandles localization of the class name and the counter names.

方法概要

方法

限定符和类型	方法和说明
boolean	equals(Object obj) Checks for (content) equality of Groups
Counters.Counter	getCounter(int id, String name) 已过时。 use getCounter(String) instead
long	getCounter(String counterName) Returns the value of the specified counter, or 0 if the counter does not exist.
Counters.Counter	getCounterForName(String name) Get the counter for the given name and create it if it doesn't exist.
String	getDisplayName() Returns localized name of the group.
String	getName() Returns raw name of the group.
int	hashCode()
Iterator<Counters.Counter>	iterator()
String	makeEscapedCompactString() Returns the compact stringified version of the group in the format {(actual-name)(display-name)(value)[][][]} where [] are compact strings for the counters within.
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	setDisplayName(String displayName) Set the display name
int	size() Returns the number of counters in this group.
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 java.lang.Object

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

方法详细资料

getName

public String getName()

Returns raw name of the group. This is the name of the enum class for this group of counters.

getDisplayName

public String getDisplayName()

Returns localized name of the group. This is the same as getName() by default, but different if an appropriate ResourceBundle is found.

setDisplayName

public void setDisplayName(String displayName)

Set the display name

makeEscapedCompactString

public String makeEscapedCompactString()

Returns the compact stringified version of the group in the format {(actual-name)(display-name)(value)[][][]} where [] are compact strings for the counters within.

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

equals

public boolean equals(Object obj)

Checks for (content) equality of Groups

覆盖:

equals 在类中 Object

getCounter

public long getCounter(String counterName)

Returns the value of the specified counter, or 0 if the counter does not exist.

getCounter

@Deprecated
public Counters.Counter getCounter(int id,
                                     String name)

已过时。 use getCounter(String) instead

Get the counter for the given id and create it if it doesn't exist.

参数:

id - the numeric id of the counter within the group

name - the internal counter name

返回:

the counter

getCounterForName

public Counters.Counter getCounterForName(String name)

Get the counter for the given name and create it if it doesn't exist.

参数:

name - the internal counter name

返回:

the counter

size

public int size()

Returns the number of counters in this group.

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

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

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

iterator

public Iterator<Counters.Counter> iterator()

指定者:

iterator 在接口中 Iterable<Counters.Counter>