org.apache.cassandra.service

Class DataResolver

java.lang.Object

org.apache.cassandra.service.ResponseResolver

org.apache.cassandra.service.DataResolver

public class DataResolver
extends ResponseResolver

Field Summary

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

command, consistency, keyspace, logger, responses

Constructor Summary

Constructors

Constructor and Description
DataResolver(Keyspace keyspace, ReadCommand command, ConsistencyLevel consistency, int maxResponseCount)

Method Summary

Modifier and Type	Method and Description
void	compareResponses() Compares received responses, potentially triggering a digest mismatch (for a digest resolver) and read-repairs (for a data resolver).
PartitionIterator	getData()
boolean	isDataPresent()
PartitionIterator	resolve()

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

getMessages, preprocess

Methods inherited from class java.lang.Object

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

Constructor Detail

DataResolver

public DataResolver(Keyspace keyspace,
                    ReadCommand command,
                    ConsistencyLevel consistency,
                    int maxResponseCount)

Method Detail

getData

public PartitionIterator getData()

Specified by:

getData in class ResponseResolver

resolve

public PartitionIterator resolve()

Specified by:

resolve in class ResponseResolver

compareResponses

public void compareResponses()

Description copied from class: ResponseResolver

Compares received responses, potentially triggering a digest mismatch (for a digest resolver) and read-repairs (for a data resolver).

This is functionally equivalent to calling ResponseResolver.resolve() and consuming the result, but can be slightly more efficient in some case due to the fact that we don't care about the result itself. This is used when doing asynchronous read-repairs.

Specified by:

compareResponses in class ResponseResolver

isDataPresent

public boolean isDataPresent()

Specified by:

isDataPresent in class ResponseResolver