Package 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:

Iterable<Row>, Partition

public final 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.

Field Summary

Fields

Modifier and Type	Field	Description
static final long	EMPTY_SIZE

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

partitionKey

Constructor Summary

Constructors

Constructor	Description
AtomicBTreePartition(TableMetadataRef metadata, DecoratedKey partitionKey, MemtableAllocator allocator)

Method Summary

Modifier and Type	Method	Description
BTreePartitionUpdater	addAll(PartitionUpdate update, Cloner cloner, 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 BTreePartitionData	holder()
Iterator<Row>	iterator()
Row	lastRow()
TableMetadata	metadata()
DecoratedKey	partitionKey()
Row	staticRow()
UnfilteredRowIterator	unfilteredIterator(BTreePartitionData current, ColumnFilter selection, Slices slices, boolean reversed)
BTreePartitionData	unsafeGetHolder()
void	unsafeSetHolder(BTreePartitionData holder)
boolean	useLock()

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

build, build, build, columns, equals, hasRows, isEmpty, partitionLevelDeletion, rowCount, stats, toString, toString, unfilteredIterator, unfilteredIterator, unfilteredIterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

EMPTY_SIZE

public static final long EMPTY_SIZE

Constructor Details

AtomicBTreePartition

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

Method Details

holder

protected BTreePartitionData holder()

Specified by:

holder in class AbstractBTreePartition

metadata

public TableMetadata metadata()

Specified by:

metadata in interface Partition

Specified by:

metadata in class AbstractBTreePartition

canHaveShadowedData

protected boolean canHaveShadowedData()

Specified by:

canHaveShadowedData in class AbstractBTreePartition

addAll

public BTreePartitionUpdater addAll(PartitionUpdate update,
 Cloner cloner,
 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 delta between updates.

unsafeSetHolder

public void unsafeSetHolder(BTreePartitionData holder)

unsafeGetHolder

public BTreePartitionData unsafeGetHolder()

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

Parameters:

clustering - clustering key to search

Returns:

row corresponding to the clustering, it's either null or non-empty row.

lastRow

public Row lastRow()

Overrides:

lastRow in class AbstractBTreePartition

unfilteredIterator

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

Overrides:

unfilteredIterator in class AbstractBTreePartition

iterator

public Iterator<Row> iterator()

Specified by:

iterator in interface Iterable<Row>

Overrides:

iterator in class AbstractBTreePartition

useLock

public boolean useLock()