org.apache.cassandra.db

Class DeletedColumn

java.lang.Object

org.apache.cassandra.db.Column

org.apache.cassandra.db.DeletedColumn

All Implemented Interfaces:

IColumn, OnDiskAtom

public class DeletedColumn
extends Column

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

name, timestamp, value

Fields inherited from interface org.apache.cassandra.db.IColumn

MAX_NAME_LENGTH

Constructor Summary

Constructors

Constructor and Description
DeletedColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp)
DeletedColumn(java.nio.ByteBuffer name, int localDeletionTime, long timestamp)

Method Summary

Methods

Modifier and Type	Method and Description
static DeletedColumn	create(int localDeletionTime, long timestamp, java.lang.String... names)
int	getLocalDeletionTime()
long	getMarkedForDeleteAt()
boolean	isMarkedForDelete()
IColumn	localCopy(ColumnFamilyStore cfs) clones the column for the row cache, interning column names and making copies of other underlying byte buffers
IColumn	localCopy(ColumnFamilyStore cfs, Allocator allocator) clones the column for the memtable, interning column names and making copies of other underlying byte buffers.
IColumn	reconcile(IColumn column, Allocator allocator)
int	serializationFlags()
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)

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

addColumn, addColumn, create, create, create, create, create, dataSize, diff, equals, getString, getSubColumn, getSubColumns, hashCode, hasIrrelevantData, isLive, maxTimestamp, minTimestamp, mostRecentLiveChangeAt, mostRecentNonGCableChangeAt, name, onDiskSerializer, reconcile, serializedSize, serializedSizeForSSTable, serializer, timestamp, validateName, value

Methods inherited from class java.lang.Object

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

Constructor Detail

DeletedColumn

public DeletedColumn(java.nio.ByteBuffer name,
             int localDeletionTime,
             long timestamp)

DeletedColumn

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

Method Detail

isMarkedForDelete

public boolean isMarkedForDelete()

Specified by:

isMarkedForDelete in interface IColumn

Overrides:

isMarkedForDelete in class Column

Returns:

true if the column has been deleted (is a tombstone). This depends on comparing the server clock with getLocalDeletionTime, so it can change during a single request if you're not careful.

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

Specified by:

getMarkedForDeleteAt in interface IColumn

Overrides:

getMarkedForDeleteAt in class Column

updateDigest

public void updateDigest(java.security.MessageDigest digest)

Specified by:

updateDigest in interface OnDiskAtom

Overrides:

updateDigest in class Column

getLocalDeletionTime

public int getLocalDeletionTime()

Specified by:

getLocalDeletionTime in interface OnDiskAtom

Overrides:

getLocalDeletionTime in class Column

reconcile

public IColumn reconcile(IColumn column,
                Allocator allocator)

Specified by:

reconcile in interface IColumn

Overrides:

reconcile in class Column

localCopy

public IColumn localCopy(ColumnFamilyStore cfs)

Description copied from interface: IColumn

clones the column for the row cache, interning column names and making copies of other underlying byte buffers

Specified by:

localCopy in interface IColumn

Overrides:

localCopy in class Column

localCopy

public IColumn localCopy(ColumnFamilyStore cfs,
                Allocator allocator)

Description copied from interface: IColumn

clones the column for the memtable, interning column names and making copies of other underlying byte buffers. Unlike the other localCopy, this uses Allocator to allocate values in contiguous memory regions, which helps avoid heap fragmentation.

Specified by:

localCopy in interface IColumn

Overrides:

localCopy in class Column

serializationFlags

public int serializationFlags()

Specified by:

serializationFlags in interface IColumn

Overrides:

serializationFlags in class Column

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface IColumn

Specified by:

validateFields in interface OnDiskAtom

Overrides:

validateFields in class Column

Throws:

MarshalException

create

public static DeletedColumn create(int localDeletionTime,
                   long timestamp,
                   java.lang.String... names)