org.apache.cassandra.service

Class ReadCallback<TMessage,TResolved>

java.lang.Object

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

All Implemented Interfaces:

IAsyncCallback<TMessage>

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

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger
IResponseResolver<TMessage,TResolved>	resolver

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

isAlive

Constructor Summary

Constructors

Constructor and Description
ReadCallback(IResponseResolver<TMessage,TResolved> resolver, ConsistencyLevel consistencyLevel, int blockfor, IReadCommand command, Keyspace keyspace, java.util.List<java.net.InetAddress> endpoints)
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

Methods

Modifier and Type	Method and Description
void	assureSufficientLiveNodes()
boolean	await(long timePastStart, java.util.concurrent.TimeUnit unit)
TResolved	get()
int	getReceivedCount()
boolean	isLatencyForSnitch()
protected void	maybeResolveForRepair(int n) Check digests in the background on the Repair stage if we've received replies to all the requests we sent.
void	response(MessageIn<TMessage> message)
void	response(TMessage result)

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.

ReadCallback

public ReadCallback(IResponseResolver<TMessage,TResolved> resolver,
            ConsistencyLevel consistencyLevel,
            int blockfor,
            IReadCommand command,
            Keyspace keyspace,
            java.util.List<java.net.InetAddress> endpoints)

Method Detail

await

public boolean await(long timePastStart,
            java.util.concurrent.TimeUnit unit)

get

public TResolved get()
              throws ReadTimeoutException,
                     DigestMismatchException

Throws:

ReadTimeoutException

DigestMismatchException

response

public void response(MessageIn<TMessage> message)

Specified by:

response in interface IAsyncCallback<TMessage>

Parameters:

message - response received.

getReceivedCount

public int getReceivedCount()

Returns:

the current number of received responses

response

public void response(TMessage result)

maybeResolveForRepair

protected void maybeResolveForRepair(int n)

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

assureSufficientLiveNodes

public void assureSufficientLiveNodes()
                               throws UnavailableException

Throws:

UnavailableException

isLatencyForSnitch

public boolean isLatencyForSnitch()

Specified by:

isLatencyForSnitch in interface IAsyncCallback<TMessage>

Returns:

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