org.apache.cassandra.db

Class CounterUpdateColumn

java.lang.Object

org.apache.cassandra.db.Column

org.apache.cassandra.db.CounterUpdateColumn

All Implemented Interfaces:

OnDiskAtom

public class CounterUpdateColumn
extends Column

A counter update while it hasn't been applied yet by the leader replica. Contains a single counter update. When applied by the leader replica, this is transformed to a relevant CounterColumn. This Column is a temporary data structure that should never be stored inside a memtable or an sstable.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.db.OnDiskAtom

OnDiskAtom.Serializer

Field Summary

Fields inherited from class org.apache.cassandra.db.Column

MAX_NAME_LENGTH, name, serializer, timestamp, value

Constructor Summary

Constructors

Constructor and Description
CounterUpdateColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp)
CounterUpdateColumn(java.nio.ByteBuffer name, long value, long timestamp)

Method Summary

Methods

Modifier and Type	Method and Description
long	delta()
Column	diff(Column column)
CounterColumn	localCopy(ColumnFamilyStore cfs)
Column	localCopy(ColumnFamilyStore cfs, Allocator allocator)
Column	reconcile(Column column, Allocator allocator)
int	serializationFlags()

Methods inherited from class org.apache.cassandra.db.Column

create, create, create, create, create, create, create, dataSize, equals, getLocalDeletionTime, getMarkedForDeleteAt, getString, hashCode, hasIrrelevantData, isLive, isMarkedForDelete, maxTimestamp, minTimestamp, name, onDiskIterator, onDiskSerializer, reconcile, serializedSize, serializedSizeForSSTable, timestamp, updateDigest, validateFields, validateName, value, withUpdatedName, withUpdatedTimestamp

Methods inherited from class java.lang.Object

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

Constructor Detail

CounterUpdateColumn

public CounterUpdateColumn(java.nio.ByteBuffer name,
                   long value,
                   long timestamp)

CounterUpdateColumn

public CounterUpdateColumn(java.nio.ByteBuffer name,
                   java.nio.ByteBuffer value,
                   long timestamp)

Method Detail

delta

public long delta()

diff

public Column diff(Column column)

Overrides:

diff in class Column

reconcile

public Column reconcile(Column column,
               Allocator allocator)

Overrides:

reconcile in class Column

serializationFlags

public int serializationFlags()

Overrides:

serializationFlags in class Column

localCopy

public CounterColumn localCopy(ColumnFamilyStore cfs)

Overrides:

localCopy in class Column

localCopy

public Column localCopy(ColumnFamilyStore cfs,
               Allocator allocator)

Overrides:

localCopy in class Column