org.apache.hadoop.mapred

类 JobHistory.TaskAttempt

java.lang.Object

org.apache.hadoop.mapred.JobHistory.Task

org.apache.hadoop.mapred.JobHistory.TaskAttempt

直接已知子类:

JobHistory.MapAttempt, JobHistory.ReduceAttempt

封闭类:

JobHistory

public static class JobHistory.TaskAttempt
extends JobHistory.Task

Base class for Map and Reduce TaskAttempts.

构造器概要

构造器

构造器和说明
JobHistory.TaskAttempt()

方法概要

方法

限定符和类型	方法和说明
String	get(JobHistory.Keys k) Get 'String' value for given key.
int	getInt(JobHistory.Keys k) Convert value from history to int and return.
long	getLong(JobHistory.Keys k) Convert value from history to int and return.
Map<JobHistory.Keys,String>	getValues() Returns Map containing all key-values.
void	handle(Map<JobHistory.Keys,String> values) Reads values back from the history, input is same Map as passed to Listener by parseHistory().
void	set(JobHistory.Keys k, String s) Set value for the key.
void	set(Map<JobHistory.Keys,String> m) Adds all values in the Map argument to its own values.

从类继承的方法 org.apache.hadoop.mapred.JobHistory.Task

getTaskAttempts, logFailed, logFailed, logFinished, logStarted, logUpdates

从类继承的方法 java.lang.Object

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

构造器详细资料

JobHistory.TaskAttempt

public JobHistory.TaskAttempt()

方法详细资料

get

public String get(JobHistory.Keys k)

Get 'String' value for given key. Most of the places use Strings as values so the default get' method returns 'String'. This method never returns null to ease on GUIs. if no value is found it returns empty string ""

参数:

k -

返回:

if null it returns empty string - ""

getInt

public int getInt(JobHistory.Keys k)

Convert value from history to int and return. if no value is found it returns 0.

参数:

k - key

getLong

public long getLong(JobHistory.Keys k)

Convert value from history to int and return. if no value is found it returns 0.

参数:

k -

set

public void set(JobHistory.Keys k,
       String s)

Set value for the key.

参数:

k -

s -

set

public void set(Map<JobHistory.Keys,String> m)

Adds all values in the Map argument to its own values.

参数:

m -

handle

public void handle(Map<JobHistory.Keys,String> values)

Reads values back from the history, input is same Map as passed to Listener by parseHistory().

参数:

values -

getValues

public Map<JobHistory.Keys,String> getValues()

Returns Map containing all key-values.