org.apache.hadoop.yarn.server.webproxy

Class AppReportFetcher

java.lang.Object

org.apache.hadoop.yarn.server.webproxy.AppReportFetcher

public class AppReportFetcher
extends Object

This class abstracts away how ApplicationReports are fetched.

Constructor Summary

Constructors

Constructor and Description
AppReportFetcher(org.apache.hadoop.conf.Configuration conf) Create a new Connection to the RM/Application History Server to fetch Application reports.
AppReportFetcher(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.yarn.api.ApplicationClientProtocol applicationsManager) Create a direct connection to RM instead of a remote connection when the proxy is running as part of the RM.

Method Summary

Modifier and Type	Method and Description
protected org.apache.hadoop.yarn.api.ApplicationHistoryProtocol	getAHSProxy(org.apache.hadoop.conf.Configuration configuration)
org.apache.hadoop.yarn.server.webproxy.AppReportFetcher.FetchedAppReport	getApplicationReport(org.apache.hadoop.yarn.api.records.ApplicationId appId) Get an application report for the specified application id from the RM and fall back to the Application History Server if not found in RM.
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

AppReportFetcher

public AppReportFetcher(org.apache.hadoop.conf.Configuration conf)

Create a new Connection to the RM/Application History Server to fetch Application reports.

Parameters:

conf - the conf to use to know where the RM is.

AppReportFetcher

public AppReportFetcher(org.apache.hadoop.conf.Configuration conf,
                        org.apache.hadoop.yarn.api.ApplicationClientProtocol applicationsManager)

Create a direct connection to RM instead of a remote connection when the proxy is running as part of the RM. Also create a remote connection to Application History Server if it is enabled.

Parameters:

conf - the configuration to use

applicationsManager - what to use to get the RM reports.

Method Detail

getAHSProxy

protected org.apache.hadoop.yarn.api.ApplicationHistoryProtocol getAHSProxy(org.apache.hadoop.conf.Configuration configuration)
                                                                     throws IOException

Throws:

IOException

getApplicationReport

public org.apache.hadoop.yarn.server.webproxy.AppReportFetcher.FetchedAppReport getApplicationReport(org.apache.hadoop.yarn.api.records.ApplicationId appId)
                                                                                              throws org.apache.hadoop.yarn.exceptions.YarnException,
                                                                                                     IOException

Get an application report for the specified application id from the RM and fall back to the Application History Server if not found in RM.

Parameters:

appId - id of the application to get.

Returns:

the ApplicationReport for the appId.

Throws:

org.apache.hadoop.yarn.exceptions.YarnException - on any error.

IOException

stop

public void stop()