Package org.apache.cassandra.db.memtable

Class SkipListMemtable

java.lang.Object

org.apache.cassandra.db.memtable.AbstractMemtable

org.apache.cassandra.db.memtable.AbstractMemtableWithCommitlog

org.apache.cassandra.db.memtable.AbstractAllocatorMemtable

org.apache.cassandra.db.memtable.SkipListMemtable

All Implemented Interfaces:

java.lang.Comparable<Memtable>, Memtable, UnfilteredSource

public class SkipListMemtable
extends AbstractAllocatorMemtable

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.memtable.AbstractMemtable

AbstractMemtable.AbstractFlushablePartitionSet<P extends Partition>, AbstractMemtable.ColumnsCollector, AbstractMemtable.StatsCollector

Nested classes/interfaces inherited from interface org.apache.cassandra.db.memtable.Memtable

Memtable.Factory, Memtable.FlushablePartitionSet<P extends Partition>, Memtable.LastCommitLogPosition, Memtable.MemoryUsage, Memtable.Owner

Field Summary

Fields

Modifier and Type	Field	Description
static Memtable.Factory	FACTORY
protected static int	ROW_OVERHEAD_HEAP_SIZE

Fields inherited from class org.apache.cassandra.db.memtable.AbstractAllocatorMemtable

allocator, initialComparator, initialFactory, MEMORY_POOL, owner

Fields inherited from class org.apache.cassandra.db.memtable.AbstractMemtable

columnsCollector, currentOperations, metadata, minLocalDeletionTime, minTimestamp, statsCollector

Fields inherited from interface org.apache.cassandra.db.memtable.Memtable

NO_MIN_TIMESTAMP

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SkipListMemtable(java.util.concurrent.atomic.AtomicReference<CommitLogPosition> commitLogLowerBound, TableMetadataRef metadataRef, Memtable.Owner owner)

Method Summary

Modifier and Type	Method	Description
Memtable.FlushablePartitionSet<?>	getFlushSet(PartitionPosition from, PartitionPosition to)	Get the collection of data between the given partition boundaries in a form suitable for flushing.
long	getLiveDataSize()	Size of the data not accounting for any metadata / mapping overheads
boolean	isClean()	True if the memtable contains no data
void	makeUnflushable()	For testing only.
long	partitionCount()	Number of partitions stored in the memtable
org.apache.cassandra.db.memtable.SkipListMemtable.MemtableUnfilteredPartitionIterator	partitionIterator(ColumnFilter columnFilter, DataRange dataRange, SSTableReadsListener readsListener)	Returns a partition iterator for the given data range.
long	put(PartitionUpdate update, UpdateTransaction indexer, OpOrder.Group opGroup)	Should only be called by ColumnFamilyStore.apply via Keyspace.apply, which supplies the appropriate OpOrdering.
UnfilteredRowIterator	rowIterator(DecoratedKey key)
UnfilteredRowIterator	rowIterator(DecoratedKey key, Slices slices, ColumnFilter selectedColumns, boolean reversed, SSTableReadsListener listener)	Returns a row iterator for the given partition, applying the specified row and column filters.

Methods inherited from class org.apache.cassandra.db.memtable.AbstractAllocatorMemtable

addMemoryUsageTo, createMemtableAllocatorPoolInternal, discard, flushLargestMemtable, getAllocator, localRangesUpdated, markExtraOffHeapUsed, markExtraOnHeapUsed, metadataUpdated, performSnapshot, shouldSwitch, switchOut, toString

Methods inherited from class org.apache.cassandra.db.memtable.AbstractMemtableWithCommitlog

accepts, getApproximateCommitLogLowerBound, getCommitLogLowerBound, getFinalCommitLogUpperBound, mayContainDataBefore

Methods inherited from class org.apache.cassandra.db.memtable.AbstractMemtable

getFlushTransaction, getMinLocalDeletionTime, getMinTimestamp, metadata, operationCount, setFlushTransaction, updateMin, updateMin

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.db.memtable.Memtable

compareTo

Field Detail

FACTORY

public static final Memtable.Factory FACTORY

ROW_OVERHEAD_HEAP_SIZE

protected static final int ROW_OVERHEAD_HEAP_SIZE

Constructor Detail

SkipListMemtable

protected SkipListMemtable(java.util.concurrent.atomic.AtomicReference<CommitLogPosition> commitLogLowerBound,
                           TableMetadataRef metadataRef,
                           Memtable.Owner owner)

Method Detail

isClean

public boolean isClean()

Description copied from interface: Memtable

True if the memtable contains no data

put

public long put(PartitionUpdate update,
                UpdateTransaction indexer,
                OpOrder.Group opGroup)

Should only be called by ColumnFamilyStore.apply via Keyspace.apply, which supplies the appropriate OpOrdering. commitLogSegmentPosition should only be null if this is a secondary index, in which case it is *expected* to be null

Parameters:

update - the partition update, may be a new partition or an update to an existing one

indexer - receives information about the update's effect

opGroup - write operation group, used to permit the operation to complete if it is needed to complete a flush to free space.

Returns:

the smallest timestamp delta between corresponding rows from existing and update. A timestamp delta being computed as the difference between the cells and DeletionTimes from any existing partition and those in update. See CASSANDRA-7979.

partitionCount

public long partitionCount()

Description copied from interface: Memtable

Number of partitions stored in the memtable

partitionIterator

public org.apache.cassandra.db.memtable.SkipListMemtable.MemtableUnfilteredPartitionIterator partitionIterator(ColumnFilter columnFilter,
                                                                                                               DataRange dataRange,
                                                                                                               SSTableReadsListener readsListener)

Description copied from interface: UnfilteredSource

Returns a partition iterator for the given data range.

Parameters:

columnFilter - filter to apply to all returned partitions

dataRange - the partition and clustering range queried

readsListener - a listener used to handle internal read events

rowIterator

public UnfilteredRowIterator rowIterator(DecoratedKey key,
                                         Slices slices,
                                         ColumnFilter selectedColumns,
                                         boolean reversed,
                                         SSTableReadsListener listener)

Description copied from interface: UnfilteredSource

Returns a row iterator for the given partition, applying the specified row and column filters.

Parameters:

key - the partition key

slices - the row ranges to return

selectedColumns - filter to apply to all returned partitions

reversed - true if the content should be returned in reverse order

listener - a listener used to handle internal read events

rowIterator

public UnfilteredRowIterator rowIterator(DecoratedKey key)

getFlushSet

public Memtable.FlushablePartitionSet<?> getFlushSet(PartitionPosition from,
                                                     PartitionPosition to)

Description copied from interface: Memtable

Get the collection of data between the given partition boundaries in a form suitable for flushing.

getLiveDataSize

public long getLiveDataSize()

Description copied from interface: Memtable

Size of the data not accounting for any metadata / mapping overheads

makeUnflushable

public void makeUnflushable()

For testing only. Give this memtable too big a size to make it always fail flushing.