org.apache.cassandra.db

Class ExpiringCell

java.lang.Object

org.apache.cassandra.db.Cell

org.apache.cassandra.db.ExpiringCell

All Implemented Interfaces:

OnDiskAtom

public class ExpiringCell
extends Cell

Alternative to Cell that have an expiring time. ExpiringCell is immutable (as Cell is). Note that ExpiringCell does not override Cell.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.Cell

MAX_NAME_LENGTH, name, timestamp, value

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static Cell	create(CellName 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(CellNameType comparator)
int	getTimeToLive()
int	hashCode()
boolean	isMarkedForDelete(long now)
Cell	localCopy(ColumnFamilyStore cfs, AbstractAllocator allocator)
int	serializationFlags()
int	serializedSize(CellNameType type, TypeSizes typeSizes)
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)
Cell	withUpdatedName(CellName newName)
Cell	withUpdatedTimestamp(long newTimestamp)

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

create, diff, excessHeapSizeExcludingData, hasIrrelevantData, isLive, maxTimestamp, minTimestamp, name, onDiskIterator, reconcile, reconcile, 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

ExpiringCell

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

ExpiringCell

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

Method Detail

create

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

Returns:

Either a DeletedCell, or an ExpiringCell.

getTimeToLive

public int getTimeToLive()

withUpdatedName

public Cell withUpdatedName(CellName newName)

Overrides:

withUpdatedName in class Cell

withUpdatedTimestamp

public Cell withUpdatedTimestamp(long newTimestamp)

Overrides:

withUpdatedTimestamp in class Cell

dataSize

public int dataSize()

Overrides:

dataSize in class Cell

serializedSize

public int serializedSize(CellNameType type,
                 TypeSizes typeSizes)

Overrides:

serializedSize in class Cell

updateDigest

public void updateDigest(java.security.MessageDigest digest)

Specified by:

updateDigest in interface OnDiskAtom

Overrides:

updateDigest in class Cell

getLocalDeletionTime

public int getLocalDeletionTime()

Specified by:

getLocalDeletionTime in interface OnDiskAtom

Overrides:

getLocalDeletionTime in class Cell

localCopy

public Cell localCopy(ColumnFamilyStore cfs,
             AbstractAllocator allocator)

Overrides:

localCopy in class Cell

getString

public java.lang.String getString(CellNameType comparator)

Overrides:

getString in class Cell

isMarkedForDelete

public boolean isMarkedForDelete(long now)

Overrides:

isMarkedForDelete in class Cell

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

Overrides:

getMarkedForDeleteAt in class Cell

serializationFlags

public int serializationFlags()

Overrides:

serializationFlags in class Cell

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface OnDiskAtom

Overrides:

validateFields in class Cell

Throws:

MarshalException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class Cell

hashCode

public int hashCode()

Overrides:

hashCode in class Cell