org.apache.cassandra.service
Class ReadCallback<TMessage,TResolved>

java.lang.Object
  org.apache.cassandra.service.ReadCallback<TMessage,TResolved>

All Implemented Interfaces:

IAsyncCallback<TMessage>, IMessageCallback

public class ReadCallback<TMessage,TResolved>
extends java.lang.Object
implements IAsyncCallback<TMessage>

Field Summary

protected static org.slf4j.Logger	logger
IResponseResolver<TMessage,TResolved>	resolver

Constructor Summary

ReadCallback(IResponseResolver<TMessage,TResolved> resolver, ConsistencyLevel consistencyLevel, IReadCommand command, java.util.List<java.net.InetAddress> filteredEndpoints)
Constructor when response count has to be calculated and blocked for.

Method Summary

void	assureSufficientLiveNodes()
TResolved	get()
boolean	isLatencyForSnitch()
protected void	maybeResolveForRepair() Check digests in the background on the Repair stage if we've received replies too all the requests we sent.
void	response(MessageIn<TMessage> message)
void	response(TMessage result)
ReadCallback<TMessage,TResolved>	withNewResolver(IResponseResolver<TMessage,TResolved> newResolver)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

resolver

public final IResponseResolver<TMessage,TResolved> resolver

Constructor Detail

ReadCallback

public ReadCallback(IResponseResolver<TMessage,TResolved> resolver,
                    ConsistencyLevel consistencyLevel,
                    IReadCommand command,
                    java.util.List<java.net.InetAddress> filteredEndpoints)

Constructor when response count has to be calculated and blocked for.

Method Detail

withNewResolver

public ReadCallback<TMessage,TResolved> withNewResolver(IResponseResolver<TMessage,TResolved> newResolver)

get

public TResolved get()
              throws ReadTimeoutException,
                     DigestMismatchException,
                     java.io.IOException

Throws:

ReadTimeoutException

DigestMismatchException

java.io.IOException

response

public void response(MessageIn<TMessage> message)

Specified by:

response in interface IAsyncCallback<TMessage>

Parameters:

message - response received.

response

public void response(TMessage result)

maybeResolveForRepair

protected void maybeResolveForRepair()

Check digests in the background on the Repair stage if we've received replies too all the requests we sent.

assureSufficientLiveNodes

public void assureSufficientLiveNodes()
                               throws UnavailableException

Throws:

UnavailableException

isLatencyForSnitch

public boolean isLatencyForSnitch()

Specified by:

isLatencyForSnitch in interface IMessageCallback

Returns:

true if this callback is on the read path and its latency should be given as input to the dynamic snitch.