org.apache.cassandra.db

Class Cell

java.lang.Object

org.apache.cassandra.db.Cell

All Implemented Interfaces:

OnDiskAtom

Direct Known Subclasses:

CounterCell, CounterUpdateCell, DeletedCell, ExpiringCell

public class Cell
extends java.lang.Object
implements OnDiskAtom

Cell is immutable, which prevents all kinds of confusion in a multithreaded environment.

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_NAME_LENGTH
protected CellName	name
protected long	timestamp
protected java.nio.ByteBuffer	value

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static Cell	create(CellName name, java.nio.ByteBuffer value, long timestamp, int ttl, CFMetaData metadata)
int	dataSize()
Cell	diff(Cell cell)
boolean	equals(java.lang.Object o)
long	excessHeapSizeExcludingData()
int	getLocalDeletionTime()
long	getMarkedForDeleteAt()
java.lang.String	getString(CellNameType comparator)
int	hashCode()
boolean	hasIrrelevantData(int gcBefore)
boolean	isLive(long now)
boolean	isMarkedForDelete(long now)
Cell	localCopy(ColumnFamilyStore cfs, AbstractAllocator allocator)
long	maxTimestamp()
long	minTimestamp() For a standard column, this is the same as timestamp().
CellName	name()
static java.util.Iterator<OnDiskAtom>	onDiskIterator(java.io.DataInput in, int count, ColumnSerializer.Flag flag, int expireBefore, Descriptor.Version version, CellNameType type) For 2.0-formatted sstables (where column count is not stored), @param count should be Integer.MAX_VALUE, and we will look for the end-of-row column name marker instead of relying on that.
Cell	reconcile(Cell cell)
Cell	reconcile(Cell cell, AbstractAllocator allocator)
int	serializationFlags()
int	serializedSize(CellNameType type, TypeSizes typeSizes)
long	timestamp()
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)
protected void	validateName(CFMetaData metadata)
java.nio.ByteBuffer	value()
Cell	withUpdatedName(CellName newName)
Cell	withUpdatedTimestamp(long newTimestamp)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NAME_LENGTH

public static final int MAX_NAME_LENGTH

See Also:

Constant Field Values

name

protected final CellName name

value

protected final java.nio.ByteBuffer value

timestamp

protected final long timestamp

Constructor Detail

Cell

public Cell(CellName name,
    java.nio.ByteBuffer value)

Cell

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

Method Detail

onDiskIterator

public static java.util.Iterator<OnDiskAtom> onDiskIterator(java.io.DataInput in,
                                            int count,
                                            ColumnSerializer.Flag flag,
                                            int expireBefore,
                                            Descriptor.Version version,
                                            CellNameType type)

For 2.0-formatted sstables (where column count is not stored), @param count should be Integer.MAX_VALUE, and we will look for the end-of-row column name marker instead of relying on that.

withUpdatedName

public Cell withUpdatedName(CellName newName)

withUpdatedTimestamp

public Cell withUpdatedTimestamp(long newTimestamp)

name

public CellName name()

Specified by:

name in interface OnDiskAtom

value

public java.nio.ByteBuffer value()

timestamp

public long timestamp()

minTimestamp

public long minTimestamp()

Description copied from interface: OnDiskAtom

For a standard column, this is the same as timestamp(). For a super column, this is the min/max column timestamp of the sub columns.

Specified by:

minTimestamp in interface OnDiskAtom

maxTimestamp

public long maxTimestamp()

Specified by:

maxTimestamp in interface OnDiskAtom

isMarkedForDelete

public boolean isMarkedForDelete(long now)

isLive

public boolean isLive(long now)

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

dataSize

public int dataSize()

excessHeapSizeExcludingData

public long excessHeapSizeExcludingData()

serializedSize

public int serializedSize(CellNameType type,
                 TypeSizes typeSizes)

serializationFlags

public int serializationFlags()

diff

public Cell diff(Cell cell)

updateDigest

public void updateDigest(java.security.MessageDigest digest)

Specified by:

updateDigest in interface OnDiskAtom

getLocalDeletionTime

public int getLocalDeletionTime()

Specified by:

getLocalDeletionTime in interface OnDiskAtom

reconcile

public Cell reconcile(Cell cell)

reconcile

public Cell reconcile(Cell cell,
             AbstractAllocator allocator)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

localCopy

public Cell localCopy(ColumnFamilyStore cfs,
             AbstractAllocator allocator)

getString

public java.lang.String getString(CellNameType comparator)

validateName

protected void validateName(CFMetaData metadata)
                     throws MarshalException

Throws:

MarshalException

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface OnDiskAtom

Throws:

MarshalException

hasIrrelevantData

public boolean hasIrrelevantData(int gcBefore)

create

public static Cell create(CellName name,
          java.nio.ByteBuffer value,
          long timestamp,
          int ttl,
          CFMetaData metadata)