org.apache.hadoop.yarn.lib

Class ZKClient

java.lang.Object

org.apache.hadoop.yarn.lib.ZKClient

public class ZKClient
extends Object

ZK Registration Library currently does not use any authorization

Constructor Summary

Constructors

Constructor and Description
ZKClient(String string) the zookeeper client library to talk to zookeeper

Method Summary

Modifier and Type	Method and Description
String	getServiceData(String path) get data published by the service at the registration address
List<String>	listServices(String path) list the services registered under a path
void	registerService(String path, String data) register the service to a specific path
void	unregisterService(String path) unregister the service.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZKClient

public ZKClient(String string)
         throws IOException

the zookeeper client library to talk to zookeeper

Parameters:

string - the host

Throws:

IOException

Method Detail

registerService

public void registerService(String path,
                            String data)
                     throws IOException,
                            InterruptedException

register the service to a specific path

Parameters:

path - the path in zookeeper namespace to register to

data - the data that is part of this registration

Throws:

IOException

InterruptedException

unregisterService

public void unregisterService(String path)
                       throws IOException,
                              InterruptedException

unregister the service.

Parameters:

path - the path at which the service was registered

Throws:

IOException

InterruptedException

listServices

public List<String> listServices(String path)
                          throws IOException,
                                 InterruptedException

list the services registered under a path

Parameters:

path - the path under which services are registered

Returns:

the list of names of services registered

Throws:

IOException

InterruptedException

getServiceData

public String getServiceData(String path)
                      throws IOException,
                             InterruptedException

get data published by the service at the registration address

Parameters:

path - the path where the service is registered

Returns:

the data of the registered service

Throws:

IOException

InterruptedException