Package org.apache.hadoop.ha

Class HAServiceProtocolHelper

java.lang.Object

org.apache.hadoop.ha.HAServiceProtocolHelper

@Public
@Evolving
public class HAServiceProtocolHelper
extends Object

Helper for making HAServiceProtocol RPC calls. This helper unwraps the RemoteException to specific exceptions.

Constructor Summary

Constructors

Constructor	Description
HAServiceProtocolHelper()

Method Summary

Modifier and Type	Method	Description
static void	monitorHealth(HAServiceProtocol svc, org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
static void	transitionToActive(HAServiceProtocol svc, org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
static void	transitionToObserver(HAServiceProtocol svc, org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
static void	transitionToStandby(HAServiceProtocol svc, org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)

Methods inherited from class java.lang.Object

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

Constructor Details

HAServiceProtocolHelper

public HAServiceProtocolHelper()

Method Details

monitorHealth

public static void monitorHealth(HAServiceProtocol svc,
 org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
                          throws IOException

Throws:

IOException

transitionToActive

public static void transitionToActive(HAServiceProtocol svc,
 org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
                               throws IOException

Throws:

IOException

transitionToStandby

public static void transitionToStandby(HAServiceProtocol svc,
 org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
                                throws IOException

Throws:

IOException

transitionToObserver

public static void transitionToObserver(HAServiceProtocol svc,
 org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo reqInfo)
                                 throws IOException

Throws:

IOException