Package org.apache.cassandra.service

Interface CASRequest

All Known Implementing Classes:

CQL3CasRequest

public interface CASRequest

Abstract the conditions and updates for a CAS operation.

Method Summary

Modifier and Type	Method	Description
boolean	appliesTo(FilteredPartition current)	Returns whether the provided CF, that represents the values fetched using the readFilter(), match the CAS conditions this object stands for.
PartitionUpdate	makeUpdates(FilteredPartition current, ClientState clientState, Ballot ballot)	The updates to perform of a CAS success.
SinglePartitionReadCommand	readCommand(long nowInSec)	The command to use to fetch the value to compare for the CAS.

Method Detail

readCommand

SinglePartitionReadCommand readCommand(long nowInSec)

The command to use to fetch the value to compare for the CAS.

appliesTo

boolean appliesTo(FilteredPartition current)
           throws InvalidRequestException

Returns whether the provided CF, that represents the values fetched using the readFilter(), match the CAS conditions this object stands for.

Throws:

InvalidRequestException

makeUpdates

PartitionUpdate makeUpdates(FilteredPartition current,
                            ClientState clientState,
                            Ballot ballot)
                     throws InvalidRequestException

The updates to perform of a CAS success. The values fetched using the readFilter() are passed as argument.

Throws:

InvalidRequestException