org.apache.cassandra.db

Class ColumnFamily

java.lang.Object

org.apache.cassandra.db.ColumnFamily

All Implemented Interfaces:

java.lang.Iterable<Column>, IMeasurableMemory, IRowCacheEntry

Direct Known Subclasses:

AbstractThreadUnsafeSortedColumns, AtomicSortedColumns

public abstract class ColumnFamily
extends java.lang.Object
implements java.lang.Iterable<Column>, IRowCacheEntry

A sorted map of columns. This represents the backing map of a colum family. Whether the implementation is thread safe or not is left to the implementing classes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ColumnFamily.Factory<T extends ColumnFamily>

Field Summary

Fields

Modifier and Type	Field and Description
protected CFMetaData	metadata
static ColumnFamilySerializer	serializer

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ColumnFamily(CFMetaData metadata)

Method Summary

Methods

Modifier and Type	Method and Description
void	addAll(ColumnFamily cf, Allocator allocator)
abstract void	addAll(ColumnFamily cm, Allocator allocator, com.google.common.base.Function<Column,Column> transformation) Adds all the columns of a given column map to this column map.
void	addAtom(OnDiskAtom atom)
void	addColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp)
void	addColumn(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int timeToLive)
void	addColumn(Column column)
abstract void	addColumn(Column column, Allocator allocator) Adds a column to this column map.
void	addCounter(java.nio.ByteBuffer name, long value)
void	addIfRelevant(Column column, DeletionInfo.InOrderTester tester, int gcBefore)
void	addTombstone(java.nio.ByteBuffer name, java.nio.ByteBuffer localDeletionTime, long timestamp)
void	addTombstone(java.nio.ByteBuffer name, int localDeletionTime, long timestamp)
java.util.Map<java.nio.ByteBuffer,java.nio.ByteBuffer>	asMap()
abstract void	clear() Clear this column family, removing all columns and deletion info.
abstract ColumnFamily	cloneMe() Clones the column map.
ColumnFamily	cloneMeShallow()
<T extends ColumnFamily> T	cloneMeShallow(ColumnFamily.Factory<T> factory, boolean reversedInsertOrder)
void	delete(ColumnFamily columns)
abstract void	delete(DeletionInfo info)
abstract void	delete(DeletionTime deletionTime)
protected abstract void	delete(RangeTombstone tombstone)
abstract DeletionInfo	deletionInfo()
ColumnFamily	diff(ColumnFamily cfComposite)
static ColumnFamily	diff(ColumnFamily cf1, ColumnFamily cf2)
static java.nio.ByteBuffer	digest(ColumnFamily cf)
boolean	equals(java.lang.Object o)
static ColumnFamily	fromBytes(java.nio.ByteBuffer bytes)
abstract Column	getColumn(java.nio.ByteBuffer name) Get a column given its name, returning null if the column is not present.
abstract int	getColumnCount() Returns the number of columns in this map.
abstract java.lang.Iterable<java.nio.ByteBuffer>	getColumnNames() Returns an iterable with the names of columns in this column map in the same order as the underlying columns themselves.
ColumnStats	getColumnStats()
AbstractType<?>	getComparator()
abstract ColumnFamily.Factory	getFactory() Returns the factory used for this ISortedColumns implementation.
abstract java.util.Collection<Column>	getReverseSortedColumns() Returns the columns of this column map as a collection.
abstract java.util.Collection<Column>	getSortedColumns() Returns the columns of this column map as a collection.
ColumnFamilyType	getType()
int	hashCode()
boolean	hasIrrelevantData(int gcBefore)
boolean	hasOnlyTombstones(long now)
java.util.UUID	id()
DeletionInfo.InOrderTester	inOrderDeletionTester() Returns a DeletionInfo.InOrderTester for the deletionInfo() of this column family.
boolean	isEmpty() Returns true if this contains no columns or deletion info
abstract boolean	isInsertReversed() Returns if this map only support inserts in reverse order.
boolean	isMarkedForDelete()
java.util.Iterator<Column>	iterator()
abstract java.util.Iterator<Column>	iterator(ColumnSlice[] slices) Returns an iterator over the columns of this map that returns only the matching @param slices.
long	maxTimestamp()
abstract void	maybeResetDeletionTimes(int gcBefore)
long	memorySize()
CFMetaData	metadata()
abstract boolean	replace(Column oldColumn, Column newColumn) Replace oldColumn if present by newColumn.
void	resolve(ColumnFamily cf)
void	resolve(ColumnFamily cf, Allocator allocator)
abstract java.util.Iterator<Column>	reverseIterator(ColumnSlice[] slices) Returns a reversed iterator over the columns of this map that returns only the matching @param slices.
abstract void	setDeletionInfo(DeletionInfo info)
java.nio.ByteBuffer	toBytes()
java.lang.String	toString()
void	updateDigest(java.security.MessageDigest digest)

Methods inherited from class java.lang.Object

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

Field Detail

serializer

public static final ColumnFamilySerializer serializer

metadata

protected final CFMetaData metadata

Constructor Detail

ColumnFamily

protected ColumnFamily(CFMetaData metadata)

Method Detail

cloneMeShallow

public <T extends ColumnFamily> T cloneMeShallow(ColumnFamily.Factory<T> factory,
                                        boolean reversedInsertOrder)

cloneMeShallow

public ColumnFamily cloneMeShallow()

getType

public ColumnFamilyType getType()

cloneMe

public abstract ColumnFamily cloneMe()

Clones the column map.

id

public java.util.UUID id()

metadata

public CFMetaData metadata()

Returns:

The CFMetaData for this row

addIfRelevant

public void addIfRelevant(Column column,
                 DeletionInfo.InOrderTester tester,
                 int gcBefore)

addColumn

public void addColumn(Column column)

addColumn

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

addColumn

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

addCounter

public void addCounter(java.nio.ByteBuffer name,
              long value)

addTombstone

public void addTombstone(java.nio.ByteBuffer name,
                java.nio.ByteBuffer localDeletionTime,
                long timestamp)

addTombstone

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

addAtom

public void addAtom(OnDiskAtom atom)

clear

public abstract void clear()

Clear this column family, removing all columns and deletion info.

inOrderDeletionTester

public DeletionInfo.InOrderTester inOrderDeletionTester()

Returns a DeletionInfo.InOrderTester for the deletionInfo() of this column family. Please note that for ThreadSafe implementation of ColumnFamily, this tester will remain valid even if new tombstones are added to this ColumnFamily *as long as said addition is done in comparator order*. For AtomicSortedColumns, the tester will correspond to the state of when this method is called.

getFactory

public abstract ColumnFamily.Factory getFactory()

Returns the factory used for this ISortedColumns implementation.

deletionInfo

public abstract DeletionInfo deletionInfo()

setDeletionInfo

public abstract void setDeletionInfo(DeletionInfo info)

delete

public abstract void delete(DeletionInfo info)

delete

public abstract void delete(DeletionTime deletionTime)

delete

protected abstract void delete(RangeTombstone tombstone)

maybeResetDeletionTimes

public abstract void maybeResetDeletionTimes(int gcBefore)

addColumn

public abstract void addColumn(Column column,
             Allocator allocator)

Adds a column to this column map. If a column with the same name is already present in the map, it will be replaced by the newly added column.

addAll

public abstract void addAll(ColumnFamily cm,
          Allocator allocator,
          com.google.common.base.Function<Column,Column> transformation)

Adds all the columns of a given column map to this column map. This is equivalent to: for (Column c : cm) addColumn(c, ...); but is potentially faster.

replace

public abstract boolean replace(Column oldColumn,
              Column newColumn)

Replace oldColumn if present by newColumn. Returns true if oldColumn was present and thus replaced. oldColumn and newColumn should have the same name.

getColumn

public abstract Column getColumn(java.nio.ByteBuffer name)

Get a column given its name, returning null if the column is not present.

getColumnNames

public abstract java.lang.Iterable<java.nio.ByteBuffer> getColumnNames()

Returns an iterable with the names of columns in this column map in the same order as the underlying columns themselves.

getSortedColumns

public abstract java.util.Collection<Column> getSortedColumns()

Returns the columns of this column map as a collection. The columns in the returned collection should be sorted as the columns in this map.

getReverseSortedColumns

public abstract java.util.Collection<Column> getReverseSortedColumns()

Returns the columns of this column map as a collection. The columns in the returned collection should be sorted in reverse order of the columns in this map.

getColumnCount

public abstract int getColumnCount()

Returns the number of columns in this map.

isEmpty

public boolean isEmpty()

Returns true if this contains no columns or deletion info

iterator

public abstract java.util.Iterator<Column> iterator(ColumnSlice[] slices)

Returns an iterator over the columns of this map that returns only the matching @param slices. The provided slices must be in order and must be non-overlapping.

reverseIterator

public abstract java.util.Iterator<Column> reverseIterator(ColumnSlice[] slices)

Returns a reversed iterator over the columns of this map that returns only the matching @param slices. The provided slices must be in reversed order and must be non-overlapping.

isInsertReversed

public abstract boolean isInsertReversed()

Returns if this map only support inserts in reverse order.

delete

public void delete(ColumnFamily columns)

addAll

public void addAll(ColumnFamily cf,
          Allocator allocator)

diff

public ColumnFamily diff(ColumnFamily cfComposite)

memorySize

public long memorySize()

Specified by:

memorySize in interface IMeasurableMemory

maxTimestamp

public long maxTimestamp()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

digest

public static java.nio.ByteBuffer digest(ColumnFamily cf)

updateDigest

public void updateDigest(java.security.MessageDigest digest)

diff

public static ColumnFamily diff(ColumnFamily cf1,
                ColumnFamily cf2)

resolve

public void resolve(ColumnFamily cf)

resolve

public void resolve(ColumnFamily cf,
           Allocator allocator)

getColumnStats

public ColumnStats getColumnStats()

isMarkedForDelete

public boolean isMarkedForDelete()

getComparator

public AbstractType<?> getComparator()

Returns:

the comparator whose sorting order the contained columns conform to

hasOnlyTombstones

public boolean hasOnlyTombstones(long now)

iterator

public java.util.Iterator<Column> iterator()

Specified by:

iterator in interface java.lang.Iterable<Column>

hasIrrelevantData

public boolean hasIrrelevantData(int gcBefore)

asMap

public java.util.Map<java.nio.ByteBuffer,java.nio.ByteBuffer> asMap()

fromBytes

public static ColumnFamily fromBytes(java.nio.ByteBuffer bytes)

toBytes

public java.nio.ByteBuffer toBytes()