Package org.apache.hadoop.mapreduce.v2.app.webapp

Class AppController

java.lang.Object

org.apache.hadoop.yarn.webapp.Controller

org.apache.hadoop.mapreduce.v2.app.webapp.AppController

All Implemented Interfaces:

AMParams, org.apache.hadoop.yarn.webapp.Params

public class AppController
extends org.apache.hadoop.yarn.webapp.Controller
implements AMParams

This class renders the various pages that the web app supports.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.yarn.webapp.Controller

org.apache.hadoop.yarn.webapp.Controller.RequestContext

Field Summary

Fields

Modifier and Type	Field	Description
protected App	app

Fields inherited from interface org.apache.hadoop.mapreduce.v2.app.webapp.AMParams

APP_ID, ATTEMPT_STATE, COUNTER_GROUP, COUNTER_NAME, JOB_ID, RM_WEB, TASK_ID, TASK_STATE, TASK_TYPE

Fields inherited from interface org.apache.hadoop.yarn.webapp.Params

ERROR_DETAILS, TITLE, TITLE_LINK, USER

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AppController(App app, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.yarn.webapp.Controller.RequestContext ctx)
protected	AppController(App app, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.yarn.webapp.Controller.RequestContext ctx, java.lang.String title)

Method Summary

Modifier and Type	Method	Description
void	attempts()	Render the attempts page
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	attemptsPage()
void	conf()	Render the /conf page
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	confPage()
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	countersPage()
void	downloadConf()	Handle requests to download the job configuration.
void	index()	Render the default(index.html) page for the Application Controller
void	info()	Render the /info page with an overview of current application.
void	job()	Render the /job page
void	jobCounters()	Render the /jobcounters page
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	jobPage()
void	requireJob()	Ensure that a JOB_ID was passed into the page.
void	requireTask()	Ensure that a TASK_ID was passed into the page.
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	singleCounterPage()
void	singleJobCounter()	Render the /singlejobcounter page
void	singleTaskCounter()	Render the /singletaskcounter page
void	task()	Render the /task page
void	taskCounters()	Display a page showing a task's counters
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	taskPage()
void	tasks()	Render the /tasks page
protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View>	tasksPage()

Methods inherited from class org.apache.hadoop.yarn.webapp.Controller

$, context, cookies, echo, error, get, getInstance, inDevMode, info, injector, render, renderJSON, renderJSON, renderText, request, response, set, setStatus, setTitle, setTitle, status, url, writer

Methods inherited from class java.lang.Object

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

Field Detail

app

protected final App app

Constructor Detail

AppController

protected AppController(App app,
                        org.apache.hadoop.conf.Configuration conf,
                        org.apache.hadoop.yarn.webapp.Controller.RequestContext ctx,
                        java.lang.String title)

AppController

@Inject
protected AppController(App app,
                        org.apache.hadoop.conf.Configuration conf,
                        org.apache.hadoop.yarn.webapp.Controller.RequestContext ctx)

Method Detail

index

public void index()

Render the default(index.html) page for the Application Controller

Specified by:

index in class org.apache.hadoop.yarn.webapp.Controller

info

public void info()

Render the /info page with an overview of current application.

jobPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> jobPage()

Returns:

The class that will render the /job page

job

public void job()

Render the /job page

countersPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> countersPage()

Returns:

the class that will render the /jobcounters page

jobCounters

public void jobCounters()

Render the /jobcounters page

taskCounters

public void taskCounters()

Display a page showing a task's counters

singleCounterPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> singleCounterPage()

Returns:

the class that will render the /singlejobcounter page

singleJobCounter

public void singleJobCounter()
                      throws java.io.IOException

Render the /singlejobcounter page

Throws:

java.io.IOException - on any error.

singleTaskCounter

public void singleTaskCounter()
                       throws java.io.IOException

Render the /singletaskcounter page

Throws:

java.io.IOException - on any error.

tasksPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> tasksPage()

Returns:

the class that will render the /tasks page

tasks

public void tasks()

Render the /tasks page

taskPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> taskPage()

Returns:

the class that will render the /task page

task

public void task()

Render the /task page

attemptsPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> attemptsPage()

Returns:

the class that will render the /attempts page

attempts

public void attempts()

Render the attempts page

confPage

protected java.lang.Class<? extends org.apache.hadoop.yarn.webapp.View> confPage()

Returns:

the page that will be used to render the /conf page

conf

public void conf()

Render the /conf page

downloadConf

public void downloadConf()

Handle requests to download the job configuration.

requireJob

public void requireJob()

Ensure that a JOB_ID was passed into the page.

requireTask

public void requireTask()

Ensure that a TASK_ID was passed into the page.