org.apache.cassandra.db.rows

Class AbstractCell<V>

java.lang.Object

org.apache.cassandra.db.rows.ColumnData

org.apache.cassandra.db.rows.Cell<V>

org.apache.cassandra.db.rows.AbstractCell<V>

All Implemented Interfaces:

IMeasurableMemory

Direct Known Subclasses:

ArrayCell, BufferCell, NativeCell

public abstract class AbstractCell<V>
extends Cell<V>

Base abstract class for Cell implementations. Unless you have a very good reason not to, every cell implementation should probably extend this class.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.rows.Cell

Cell.Factory<V>

Nested classes/interfaces inherited from class org.apache.cassandra.db.rows.ColumnData

ColumnData.PostReconciliationFunction, ColumnData.Reconciler

Field Summary

Fields inherited from class org.apache.cassandra.db.rows.Cell

comparator, MAX_DELETION_TIME, NO_DELETION_TIME, NO_TTL, serializer

Fields inherited from class org.apache.cassandra.db.rows.ColumnData

column, noOp

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractCell(ColumnMetadata column)

Method Summary

Modifier and Type	Method and Description
Cell<?>	clone(ByteBufferCloner cloner)
int	dataSize() The size of the data hold by this ColumnData.
void	digest(Digest digest) Adds the data to the provided digest.
static <V1,V2> boolean	equals(Cell<V1> left, Cell<V2> right)
boolean	equals(java.lang.Object other)
int	hashCode()
boolean	hasInvalidDeletions() Validates the deletions (ttl and local deletion time) if any.
boolean	isCounterCell() Whether the cell is a counter cell or not.
boolean	isExpiring() Whether the cell is an expiring one or not.
boolean	isLive(int nowInSec) Whether the cell is live or not given the current time.
boolean	isTombstone() Whether the cell is a tombstone or not.
Cell<?>	markCounterLocalToBeCleared()
long	maxTimestamp()
Cell<?>	purge(DeletionPurger purger, int nowInSec)
Cell<?>	purgeDataOlderThan(long timestamp)
java.lang.String	toString()
Cell<?>	updateAllTimestamp(long newTimestamp) Returns a copy of the data where all timestamps for live data have replaced by newTimestamp and all deletion timestamp by newTimestamp - 1.
void	validate() Validate the column data.

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

accessor, buffer, clone, localDeletionTime, path, timestamp, ttl, value, valueSize, withSkippedValue, withUpdatedColumn, withUpdatedTimestampAndLocalDeletionTime, withUpdatedValue

Methods inherited from class org.apache.cassandra.db.rows.ColumnData

column, digest, reconciler, unsharedHeapSize, unsharedHeapSizeExcludingData

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCell

protected AbstractCell(ColumnMetadata column)

Method Detail

isCounterCell

public boolean isCounterCell()

Description copied from class: Cell

Whether the cell is a counter cell or not.

Specified by:

isCounterCell in class Cell<V>

Returns:

whether the cell is a counter cell or not.

isLive

public boolean isLive(int nowInSec)

Description copied from class: Cell

Whether the cell is live or not given the current time.

Specified by:

isLive in class Cell<V>

Parameters:

nowInSec - the current time in seconds. This is used to decide if an expiring cell is expired or live.

Returns:

whether the cell is live or not at nowInSec.

isTombstone

public boolean isTombstone()

Description copied from class: Cell

Whether the cell is a tombstone or not.

Specified by:

isTombstone in class Cell<V>

Returns:

whether the cell is a tombstone or not.

isExpiring

public boolean isExpiring()

Description copied from class: Cell

Whether the cell is an expiring one or not.

Note that this only correspond to whether the cell liveness info have a TTL or not, but doesn't tells whether the cell is already expired or not. You should use Cell.isLive(int) for that latter information.

Specified by:

isExpiring in class Cell<V>

Returns:

whether the cell is an expiring one or not.

markCounterLocalToBeCleared

public Cell<?> markCounterLocalToBeCleared()

Specified by:

markCounterLocalToBeCleared in class Cell<V>

purge

public Cell<?> purge(DeletionPurger purger,
                     int nowInSec)

Specified by:

purge in class Cell<V>

purgeDataOlderThan

public Cell<?> purgeDataOlderThan(long timestamp)

Specified by:

purgeDataOlderThan in class Cell<V>

clone

public Cell<?> clone(ByteBufferCloner cloner)

Specified by:

clone in class Cell<V>

updateAllTimestamp

public Cell<?> updateAllTimestamp(long newTimestamp)

Description copied from class: ColumnData

Returns a copy of the data where all timestamps for live data have replaced by newTimestamp and all deletion timestamp by newTimestamp - 1. This exists for the Paxos path, see PartitionUpdate#updateAllTimestamp for additional details.

Specified by:

updateAllTimestamp in class ColumnData

dataSize

public int dataSize()

Description copied from class: ColumnData

The size of the data hold by this ColumnData.

Specified by:

dataSize in class ColumnData

Returns:

the size used by the data of this ColumnData.

digest

public void digest(Digest digest)

Description copied from class: ColumnData

Adds the data to the provided digest.

Specified by:

digest in class ColumnData

Parameters:

digest - the Digest to add the data to.

validate

public void validate()

Description copied from class: ColumnData

Validate the column data.

Specified by:

validate in class ColumnData

hasInvalidDeletions

public boolean hasInvalidDeletions()

Description copied from class: ColumnData

Validates the deletions (ttl and local deletion time) if any.

Specified by:

hasInvalidDeletions in class ColumnData

Returns:

true if it has any invalid deletions, false otherwise

maxTimestamp

public long maxTimestamp()

Specified by:

maxTimestamp in class ColumnData

equals

public static <V1,V2> boolean equals(Cell<V1> left,
                                     Cell<V2> right)

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object