org.apache.cassandra.db.partitions

Class AtomicBTreePartition

java.lang.Object

org.apache.cassandra.db.partitions.AbstractBTreePartition

org.apache.cassandra.db.partitions.AtomicBTreePartition

All Implemented Interfaces:

java.lang.Iterable<Row>, Partition

public class AtomicBTreePartition
extends AbstractBTreePartition

A thread-safe and atomic Partition implementation. Operations (in particular addAll) on this implementation are atomic and isolated (in the sense of ACID). Typically a addAll is guaranteed that no other thread can see the state where only parts but not all rows have been added.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

AbstractBTreePartition.Holder, AbstractBTreePartition.SlicesIterator

Field Summary

Fields

Modifier and Type	Field and Description
static long	EMPTY_SIZE

Fields inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

EMPTY, metadata, partitionKey

Constructor Summary

Constructors

Constructor and Description
AtomicBTreePartition(CFMetaData metadata, DecoratedKey partitionKey, MemtableAllocator allocator)

Method Summary

Modifier and Type	Method and Description
long[]	addAllWithSizeDelta(PartitionUpdate update, OpOrder.Group writeOp, UpdateTransaction indexer) Adds a given update to this in-memtable partition.
protected boolean	canHaveShadowedData()
DeletionInfo	deletionInfo()
Row	getRow(Clustering clustering) Returns the row corresponding to the provided clustering, or null if there is not such row.
protected AbstractBTreePartition.Holder	holder()
java.util.Iterator<Row>	iterator()
Row	lastRow()
DecoratedKey	partitionKey()
SearchIterator<Clustering,Row>	searchIterator(ColumnFilter columns, boolean reversed) Returns an iterator that allows to search specific rows efficiently.
Row	staticRow()
UnfilteredRowIterator	unfilteredIterator() Returns an UnfilteredRowIterator over all the rows/RT contained by this partition.
UnfilteredRowIterator	unfilteredIterator(AbstractBTreePartition.Holder current, ColumnFilter selection, Slices slices, boolean reversed)
UnfilteredRowIterator	unfilteredIterator(ColumnFilter selection, Slices slices, boolean reversed) Returns an UnfilteredRowIterator over the rows/RT contained by this partition selected by the provided slices.
boolean	useLock()

Methods inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

build, build, build, build, columns, hasRows, isEmpty, metadata, partitionLevelDeletion, rowCount, stats, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

EMPTY_SIZE

public static final long EMPTY_SIZE

Constructor Detail

AtomicBTreePartition

public AtomicBTreePartition(CFMetaData metadata,
                            DecoratedKey partitionKey,
                            MemtableAllocator allocator)

Method Detail

holder

protected AbstractBTreePartition.Holder holder()

Specified by:

holder in class AbstractBTreePartition

canHaveShadowedData

protected boolean canHaveShadowedData()

Specified by:

canHaveShadowedData in class AbstractBTreePartition

addAllWithSizeDelta

public long[] addAllWithSizeDelta(PartitionUpdate update,
                                  OpOrder.Group writeOp,
                                  UpdateTransaction indexer)

Adds a given update to this in-memtable partition.

Returns:

an array containing first the difference in size seen after merging the updates, and second the minimum time detla between updates.

deletionInfo

public DeletionInfo deletionInfo()

Overrides:

deletionInfo in class AbstractBTreePartition

staticRow

public Row staticRow()

Overrides:

staticRow in class AbstractBTreePartition

partitionKey

public DecoratedKey partitionKey()

Specified by:

partitionKey in interface Partition

Overrides:

partitionKey in class AbstractBTreePartition

getRow

public Row getRow(Clustering clustering)

Description copied from interface: Partition

Returns the row corresponding to the provided clustering, or null if there is not such row.

Specified by:

getRow in interface Partition

Overrides:

getRow in class AbstractBTreePartition

lastRow

public Row lastRow()

Overrides:

lastRow in class AbstractBTreePartition

searchIterator

public SearchIterator<Clustering,Row> searchIterator(ColumnFilter columns,
                                                     boolean reversed)

Description copied from interface: Partition

Returns an iterator that allows to search specific rows efficiently.

Specified by:

searchIterator in interface Partition

Overrides:

searchIterator in class AbstractBTreePartition

unfilteredIterator

public UnfilteredRowIterator unfilteredIterator(ColumnFilter selection,
                                                Slices slices,
                                                boolean reversed)

Description copied from interface: Partition

Returns an UnfilteredRowIterator over the rows/RT contained by this partition selected by the provided slices.

Specified by:

unfilteredIterator in interface Partition

Overrides:

unfilteredIterator in class AbstractBTreePartition

unfilteredIterator

public UnfilteredRowIterator unfilteredIterator()

Description copied from interface: Partition

Returns an UnfilteredRowIterator over all the rows/RT contained by this partition.

Specified by:

unfilteredIterator in interface Partition

Overrides:

unfilteredIterator in class AbstractBTreePartition

unfilteredIterator

public UnfilteredRowIterator unfilteredIterator(AbstractBTreePartition.Holder current,
                                                ColumnFilter selection,
                                                Slices slices,
                                                boolean reversed)

Overrides:

unfilteredIterator in class AbstractBTreePartition

iterator

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

Specified by:

iterator in interface java.lang.Iterable<Row>

Overrides:

iterator in class AbstractBTreePartition

useLock

public boolean useLock()