HintVerbHandler (apache-cassandra API)

java.lang.Object
- org.apache.cassandra.hints.HintVerbHandler

All Implemented Interfaces:

IVerbHandler<HintMessage>
```
public final class HintVerbHandler
extends java.lang.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 HintVerbHandler instance

Constructor Summary

Constructors
Constructor Description

HintVerbHandler()

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail
  - instance
```
public static final HintVerbHandler instance
```
- Constructor Detail
  - HintVerbHandler
```
public HintVerbHandler()
```
- Method Detail
  - 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.