Package org.apache.cassandra.hints

Class HintVerbHandler

java.lang.Object

org.apache.cassandra.hints.HintVerbHandler

All Implemented Interfaces:

IVerbHandler<HintMessage>

public final class HintVerbHandler
extends Object
implements IVerbHandler<HintMessage>

Verb handler used both for hint dispatch and streaming.

With the non-sstable format, we cannot just stream hint sstables on node decommission. So sometimes, at decommission time, we might have to stream hints to a non-owning host (say, if the owning host B is down during decommission of host A). In that case the handler just stores the received hint in its local hint store.

Field Summary

Fields

Modifier and Type	Field	Description
static final HintVerbHandler	instance

Constructor Summary

Constructors

Constructor	Description
HintVerbHandler()

Method Summary

Modifier and Type	Method	Description
void	doVerb(Message<HintMessage> message)	This method delivers a message to the implementing class (if the implementing class was registered by a call to MessagingService.registerVerbHandlers).

Methods inherited from class java.lang.Object

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

Field Details

instance

public static final HintVerbHandler instance

Constructor Details

HintVerbHandler

public HintVerbHandler()

Method Details

doVerb

public void doVerb(Message<HintMessage> message)

Description copied from interface: IVerbHandler

This method delivers a message to the implementing class (if the implementing class was registered by a call to MessagingService.registerVerbHandlers). Note that the caller should not be holding any locks when calling this method because the implementation may be synchronized.

Specified by:

doVerb in interface IVerbHandler<HintMessage>

Parameters:

message - - incoming message that needs handling.