org.apache.cassandra.db

Class ExpiringColumn

java.lang.Object

org.apache.cassandra.db.Column

org.apache.cassandra.db.ExpiringColumn

All Implemented Interfaces:

OnDiskAtom

public class ExpiringColumn
extends Column

Alternative to Column that have an expiring time. ExpiringColumn is immutable (as Column is). Note that ExpiringColumn does not override Column.getMarkedForDeleteAt, which means that it's in the somewhat unintuitive position of being deleted (after its expiration) without having a time-at-which-it-became-deleted. (Because ttl is a server-side measurement, we can't mix it with the timestamp field, which is client-supplied and whose resolution we can't assume anything about.)

Nested Class Summary

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

OnDiskAtom.Serializer

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_TTL

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

MAX_NAME_LENGTH, name, serializer, timestamp, value

Constructor Summary

Constructors

Constructor and Description
ExpiringColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int timeToLive)
ExpiringColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int timeToLive, int localExpirationTime)

Method Summary

Methods

Modifier and Type	Method and Description
static Column	create(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int timeToLive, int localExpirationTime, int expireBefore, ColumnSerializer.Flag flag)
int	dataSize()
boolean	equals(java.lang.Object o)
int	getLocalDeletionTime()
long	getMarkedForDeleteAt()
java.lang.String	getString(AbstractType<?> comparator)
int	getTimeToLive()
int	hashCode()
boolean	isMarkedForDelete(long now)
Column	localCopy(ColumnFamilyStore cfs)
Column	localCopy(ColumnFamilyStore cfs, Allocator allocator)
int	serializationFlags()
int	serializedSize(TypeSizes typeSizes)
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)
Column	withUpdatedName(java.nio.ByteBuffer newName)
Column	withUpdatedTimestamp(long newTimestamp)

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

create, create, create, create, create, create, create, diff, hasIrrelevantData, isLive, maxTimestamp, minTimestamp, name, onDiskIterator, onDiskSerializer, reconcile, reconcile, serializedSizeForSSTable, timestamp, validateName, value

Methods inherited from class java.lang.Object

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

Field Detail

MAX_TTL

public static final int MAX_TTL

See Also:

Constant Field Values

Constructor Detail

ExpiringColumn

public ExpiringColumn(java.nio.ByteBuffer name,
              java.nio.ByteBuffer value,
              long timestamp,
              int timeToLive)

ExpiringColumn

public ExpiringColumn(java.nio.ByteBuffer name,
              java.nio.ByteBuffer value,
              long timestamp,
              int timeToLive,
              int localExpirationTime)

Method Detail

create

public static Column create(java.nio.ByteBuffer name,
            java.nio.ByteBuffer value,
            long timestamp,
            int timeToLive,
            int localExpirationTime,
            int expireBefore,
            ColumnSerializer.Flag flag)

Returns:

Either a DeletedColumn, or an ExpiringColumn.

getTimeToLive

public int getTimeToLive()

withUpdatedName

public Column withUpdatedName(java.nio.ByteBuffer newName)

Overrides:

withUpdatedName in class Column

withUpdatedTimestamp

public Column withUpdatedTimestamp(long newTimestamp)

Overrides:

withUpdatedTimestamp in class Column

dataSize

public int dataSize()

Overrides:

dataSize in class Column

serializedSize

public int serializedSize(TypeSizes typeSizes)

Specified by:

serializedSize in interface OnDiskAtom

Overrides:

serializedSize 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

localCopy

public Column localCopy(ColumnFamilyStore cfs)

Overrides:

localCopy in class Column

localCopy

public Column localCopy(ColumnFamilyStore cfs,
               Allocator allocator)

Overrides:

localCopy in class Column

getString

public java.lang.String getString(AbstractType<?> comparator)

Overrides:

getString in class Column

isMarkedForDelete

public boolean isMarkedForDelete(long now)

Overrides:

isMarkedForDelete in class Column

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

Overrides:

getMarkedForDeleteAt in class Column

serializationFlags

public int serializationFlags()

Overrides:

serializationFlags in class Column

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface OnDiskAtom

Overrides:

validateFields in class Column

Throws:

MarshalException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class Column

hashCode

public int hashCode()

Overrides:

hashCode in class Column