org.apache.cassandra.db

Class Memtable

java.lang.Object

org.apache.cassandra.db.Memtable

All Implemented Interfaces:

java.lang.Comparable<Memtable>

public class Memtable
extends java.lang.Object
implements java.lang.Comparable<Memtable>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Memtable.LastReplayPosition
static class	Memtable.MemtableUnfilteredPartitionIterator

Field Summary

Fields

Modifier and Type	Field and Description
ColumnFamilyStore	cfs
ClusteringComparator	initialComparator

Constructor Summary

Constructors

Constructor and Description
Memtable(java.util.concurrent.atomic.AtomicReference<ReplayPosition> commitLogLowerBound, ColumnFamilyStore cfs)
Memtable(CFMetaData metadata)

Method Summary

Modifier and Type	Method and Description
boolean	accepts(OpOrder.Group opGroup, ReplayPosition replayPosition)
int	compareTo(Memtable that)
SSTableTxnWriter	createFlushWriter(java.lang.String filename, PartitionColumns columns, EncodingStats stats)
java.util.Collection<SSTableReader>	flush()
MemtableAllocator	getAllocator()
ReplayPosition	getCommitLogLowerBound()
ReplayPosition	getCommitLogUpperBound()
long	getLiveDataSize()
long	getMinTimestamp()
long	getOperations()
Partition	getPartition(DecoratedKey key)
boolean	isClean()
boolean	isExpired()
boolean	isLive()
Memtable.MemtableUnfilteredPartitionIterator	makePartitionIterator(ColumnFilter columnFilter, DataRange dataRange, boolean isForThrift)
void	makeUnflushable() For testing only.
boolean	mayContainDataBefore(ReplayPosition position)
int	partitionCount()
void	setDiscarding(OpOrder.Barrier writeBarrier, java.util.concurrent.atomic.AtomicReference<ReplayPosition> lastReplayPosition)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

cfs

public final ColumnFamilyStore cfs

initialComparator

public final ClusteringComparator initialComparator

Constructor Detail

Memtable

public Memtable(java.util.concurrent.atomic.AtomicReference<ReplayPosition> commitLogLowerBound,
                ColumnFamilyStore cfs)

Memtable

public Memtable(CFMetaData metadata)

Method Detail

compareTo

public int compareTo(Memtable that)

Specified by:

compareTo in interface java.lang.Comparable<Memtable>

getAllocator

public MemtableAllocator getAllocator()

getLiveDataSize

public long getLiveDataSize()

getOperations

public long getOperations()

setDiscarding

public void setDiscarding(OpOrder.Barrier writeBarrier,
                          java.util.concurrent.atomic.AtomicReference<ReplayPosition> lastReplayPosition)

accepts

public boolean accepts(OpOrder.Group opGroup,
                       ReplayPosition replayPosition)

getCommitLogLowerBound

public ReplayPosition getCommitLogLowerBound()

getCommitLogUpperBound

public ReplayPosition getCommitLogUpperBound()

isLive

public boolean isLive()

isClean

public boolean isClean()

mayContainDataBefore

public boolean mayContainDataBefore(ReplayPosition position)

isExpired

public boolean isExpired()

Returns:

true if this memtable is expired. Expiration time is determined by CF's memtable_flush_period_in_ms.

partitionCount

public int partitionCount()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

makePartitionIterator

public Memtable.MemtableUnfilteredPartitionIterator makePartitionIterator(ColumnFilter columnFilter,
                                                                          DataRange dataRange,
                                                                          boolean isForThrift)

getPartition

public Partition getPartition(DecoratedKey key)

flush

public java.util.Collection<SSTableReader> flush()

getMinTimestamp

public long getMinTimestamp()

makeUnflushable

public void makeUnflushable()

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

createFlushWriter

public SSTableTxnWriter createFlushWriter(java.lang.String filename,
                                          PartitionColumns columns,
                                          EncodingStats stats)