Package org.apache.cassandra.service.reads

Class ReadCallback<E extends Endpoints<E>,P extends ReplicaPlan.ForRead<E>>

java.lang.Object

org.apache.cassandra.service.reads.ReadCallback<E,P>

All Implemented Interfaces:

RequestCallback<ReadResponse>

public class ReadCallback<E extends Endpoints<E>,P extends ReplicaPlan.ForRead<E>>
extends java.lang.Object
implements RequestCallback<ReadResponse>

Field Summary

Fields

Modifier and Type	Field	Description
protected static org.slf4j.Logger	logger
ResponseResolver<E,P>	resolver

Constructor Summary

Constructors

Constructor	Description
ReadCallback(ResponseResolver<E,P> resolver, ReadCommand command, ReplicaPlan.Shared<E,P> replicaPlan, long queryStartNanoTime)

Method Summary

Modifier and Type	Method	Description
boolean	await(long timePastStart, java.util.concurrent.TimeUnit unit)
void	awaitResults()
int	blockFor()
boolean	invokeOnFailure()
void	onFailure(InetAddressAndPort from, RequestFailureReason failureReason)	Called when there is an exception on the remote node or timeout happens
void	onResponse(Message<ReadResponse> message)
protected P	replicaPlan()
void	response(ReadResponse result)
boolean	trackLatencyForSnitch()

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 ResponseResolver<E extends Endpoints<E>,P extends ReplicaPlan.ForRead<E>> resolver

Constructor Detail

ReadCallback

public ReadCallback(ResponseResolver<E,P> resolver,
                    ReadCommand command,
                    ReplicaPlan.Shared<E,P> replicaPlan,
                    long queryStartNanoTime)

Method Detail

replicaPlan

protected P replicaPlan()

await

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

awaitResults

public void awaitResults()
                  throws ReadFailureException,
                         ReadTimeoutException

Throws:

ReadFailureException

ReadTimeoutException

blockFor

public int blockFor()

onResponse

public void onResponse(Message<ReadResponse> message)

Specified by:

onResponse in interface RequestCallback<E extends Endpoints<E>>

Parameters:

message - response received.

response

public void response(ReadResponse result)

trackLatencyForSnitch

public boolean trackLatencyForSnitch()

Specified by:

trackLatencyForSnitch in interface RequestCallback<E extends Endpoints<E>>

Returns:

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

onFailure

public void onFailure(InetAddressAndPort from,
                      RequestFailureReason failureReason)

Description copied from interface: RequestCallback

Called when there is an exception on the remote node or timeout happens

Specified by:

onFailure in interface RequestCallback<E extends Endpoints<E>>

invokeOnFailure

public boolean invokeOnFailure()

Specified by:

invokeOnFailure in interface RequestCallback<E extends Endpoints<E>>

Returns:

true if the callback should be invoked on failure