org.apache.cassandra.service

Class DatacenterWriteResponseHandler<T>

java.lang.Object

org.apache.cassandra.service.AbstractWriteResponseHandler<T>

org.apache.cassandra.service.WriteResponseHandler<T>

org.apache.cassandra.service.DatacenterWriteResponseHandler<T>

All Implemented Interfaces:

IAsyncCallback<T>, IAsyncCallbackWithFailure<T>

public class DatacenterWriteResponseHandler<T>
extends WriteResponseHandler<T>

This class blocks for a quorum of responses _in the local datacenter only_ (CL.LOCAL_QUORUM).

Field Summary

Fields inherited from class org.apache.cassandra.service.WriteResponseHandler

logger, responses

Fields inherited from class org.apache.cassandra.service.AbstractWriteResponseHandler

callback, consistencyLevel, keyspace, naturalEndpoints, pendingEndpoints, start

Fields inherited from interface org.apache.cassandra.net.IAsyncCallback

isAlive

Constructor Summary

Constructors

Constructor and Description
DatacenterWriteResponseHandler(java.util.Collection<java.net.InetAddress> naturalEndpoints, java.util.Collection<java.net.InetAddress> pendingEndpoints, ConsistencyLevel consistencyLevel, Keyspace keyspace, java.lang.Runnable callback, WriteType writeType)

Method Summary

Methods

Modifier and Type	Method and Description
void	response(MessageIn<T> message) null message means "response from local write"
protected int	totalBlockFor()
protected boolean	waitingFor(java.net.InetAddress from)

Methods inherited from class org.apache.cassandra.service.WriteResponseHandler

ackCount, isLatencyForSnitch

Methods inherited from class org.apache.cassandra.service.AbstractWriteResponseHandler

assureSufficientLiveNodes, get, onFailure, signal, totalEndpoints

Methods inherited from class java.lang.Object

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

Constructor Detail

DatacenterWriteResponseHandler

public DatacenterWriteResponseHandler(java.util.Collection<java.net.InetAddress> naturalEndpoints,
                              java.util.Collection<java.net.InetAddress> pendingEndpoints,
                              ConsistencyLevel consistencyLevel,
                              Keyspace keyspace,
                              java.lang.Runnable callback,
                              WriteType writeType)

Method Detail

response

public void response(MessageIn<T> message)

Description copied from class: AbstractWriteResponseHandler

null message means "response from local write"

Specified by:

response in interface IAsyncCallback<T>

Overrides:

response in class WriteResponseHandler<T>

Parameters:

message - response received.

totalBlockFor

protected int totalBlockFor()

Overrides:

totalBlockFor in class AbstractWriteResponseHandler<T>

Returns:

the minimum number of endpoints that must reply.

waitingFor

protected boolean waitingFor(java.net.InetAddress from)

Overrides:

waitingFor in class AbstractWriteResponseHandler<T>

Returns:

true if the message counts towards the totalBlockFor() threshold