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

Methods

Modifier and Type	Method and Description
boolean	appliesTo(ColumnFamily current) Returns whether the provided CF, that represents the values fetched using the readFilter(), match the CAS conditions this object stands for.
ColumnFamily	makeUpdates(ColumnFamily current) The updates to perform of a CAS success.
IDiskAtomFilter	readFilter() The filter to use to fetch the value to compare for the CAS.

Method Detail

readFilter

IDiskAtomFilter readFilter()

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

appliesTo

boolean appliesTo(ColumnFamily 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

ColumnFamily makeUpdates(ColumnFamily current)
                         throws InvalidRequestException

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

Throws:

InvalidRequestException