org.apache.cassandra.service

Class RowDataResolver

java.lang.Object

org.apache.cassandra.service.AbstractRowResolver

org.apache.cassandra.service.RowDataResolver

All Implemented Interfaces:

IResponseResolver<ReadResponse,Row>

public class RowDataResolver
extends AbstractRowResolver

Field Summary

Fields

Modifier and Type	Field and Description
java.util.List<AsyncOneResponse>	repairResults

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

key, keyspaceName, logger, replies

Constructor Summary

Constructors

Constructor and Description
RowDataResolver(java.lang.String keyspaceName, java.nio.ByteBuffer key, IDiskAtomFilter qFilter, long timestamp, int maxResponseCount)

Method Summary

Methods

Modifier and Type	Method and Description
Row	getData() returns the data response without comparing with any digests
int	getMaxLiveCount()
boolean	isDataPresent()
Row	resolve() This Method resolves the responses that are passed in .
static java.util.List<AsyncOneResponse>	scheduleRepairs(ColumnFamily resolved, java.lang.String keyspaceName, DecoratedKey key, java.util.List<ColumnFamily> versions, java.util.List<java.net.InetAddress> endpoints) For each row version, compare with resolved (the superset of all row versions); if it is missing anything, send a mutation to the endpoint it come from.

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

getMessages, preprocess

Methods inherited from class java.lang.Object

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

Field Detail

repairResults

public java.util.List<AsyncOneResponse> repairResults

Constructor Detail

RowDataResolver

public RowDataResolver(java.lang.String keyspaceName,
               java.nio.ByteBuffer key,
               IDiskAtomFilter qFilter,
               long timestamp,
               int maxResponseCount)

Method Detail

resolve

public Row resolve()
            throws DigestMismatchException

Description copied from interface: IResponseResolver

This Method resolves the responses that are passed in . for example : if its write response then all we get is true or false return values which implies if the writes were successful but for reads its more complicated you need to look at the responses and then based on differences schedule repairs . Hence you need to derive a response resolver based on your needs from this interface.

Throws:

DigestMismatchException

scheduleRepairs

public static java.util.List<AsyncOneResponse> scheduleRepairs(ColumnFamily resolved,
                                               java.lang.String keyspaceName,
                                               DecoratedKey key,
                                               java.util.List<ColumnFamily> versions,
                                               java.util.List<java.net.InetAddress> endpoints)

For each row version, compare with resolved (the superset of all row versions); if it is missing anything, send a mutation to the endpoint it come from.

getData

public Row getData()

Description copied from interface: IResponseResolver

returns the data response without comparing with any digests

isDataPresent

public boolean isDataPresent()

getMaxLiveCount

public int getMaxLiveCount()