org.apache.cassandra.service

Class ReadCallback

java.lang.Object

org.apache.cassandra.service.ReadCallback

All Implemented Interfaces:

IAsyncCallback<ReadResponse>, IAsyncCallbackWithFailure<ReadResponse>

public class ReadCallback
extends java.lang.Object
implements IAsyncCallbackWithFailure<ReadResponse>

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger
ResponseResolver	resolver

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

isAlive

Constructor Summary

Constructors

Constructor and Description
ReadCallback(ResponseResolver resolver, ConsistencyLevel consistencyLevel, int blockfor, ReadCommand command, Keyspace keyspace, java.util.List<java.net.InetAddress> endpoints, long queryStartNanoTime)
ReadCallback(ResponseResolver resolver, ConsistencyLevel consistencyLevel, ReadCommand command, java.util.List<java.net.InetAddress> filteredEndpoints, long queryStartNanoTime) Constructor when response count has to be calculated and blocked for.

Method Summary

Modifier and Type	Method and Description
void	assureSufficientLiveNodes()
boolean	await(long timePastStart, java.util.concurrent.TimeUnit unit)
void	awaitResults()
int	blockFor()
PartitionIterator	get()
int	getReceivedCount()
boolean	isLatencyForSnitch()
void	onFailure(java.net.InetAddress from, RequestFailureReason failureReason) Called when there is an exception on the remote node or timeout happens
void	response(MessageIn<ReadResponse> message)
void	response(ReadResponse result)

Methods inherited from class java.lang.Object

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

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

supportsBackPressure

Field Detail

logger

protected static final org.slf4j.Logger logger

resolver

public final ResponseResolver resolver

Constructor Detail

ReadCallback

public ReadCallback(ResponseResolver resolver,
                    ConsistencyLevel consistencyLevel,
                    ReadCommand command,
                    java.util.List<java.net.InetAddress> filteredEndpoints,
                    long queryStartNanoTime)

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

ReadCallback

public ReadCallback(ResponseResolver resolver,
                    ConsistencyLevel consistencyLevel,
                    int blockfor,
                    ReadCommand command,
                    Keyspace keyspace,
                    java.util.List<java.net.InetAddress> endpoints,
                    long queryStartNanoTime)

Method Detail

await

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

awaitResults

public void awaitResults()
                  throws ReadFailureException,
                         ReadTimeoutException

Throws:

ReadFailureException

ReadTimeoutException

get

public PartitionIterator get()
                      throws ReadFailureException,
                             ReadTimeoutException,
                             DigestMismatchException

Throws:

ReadFailureException

ReadTimeoutException

DigestMismatchException

blockFor

public int blockFor()

response

public void response(MessageIn<ReadResponse> message)

Specified by:

response in interface IAsyncCallback<ReadResponse>

Parameters:

message - response received.

getReceivedCount

public int getReceivedCount()

Returns:

the current number of received responses

response

public void response(ReadResponse result)

assureSufficientLiveNodes

public void assureSufficientLiveNodes()
                               throws UnavailableException

Throws:

UnavailableException

isLatencyForSnitch

public boolean isLatencyForSnitch()

Specified by:

isLatencyForSnitch in interface IAsyncCallback<ReadResponse>

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(java.net.InetAddress from,
                      RequestFailureReason failureReason)

Description copied from interface: IAsyncCallbackWithFailure

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

Specified by:

onFailure in interface IAsyncCallbackWithFailure<ReadResponse>