org.apache.hadoop.hbase.regionserver

Class ImmutableSegment

java.lang.Object

org.apache.hadoop.hbase.regionserver.Segment

org.apache.hadoop.hbase.regionserver.ImmutableSegment

All Implemented Interfaces:

MemStoreSizing

Direct Known Subclasses:

CellArrayImmutableSegment, CellChunkImmutableSegment, CompositeImmutableSegment, CSLMImmutableSegment

@InterfaceAudience.Private
public abstract class ImmutableSegment
extends Segment

ImmutableSegment is an abstract class that extends the API supported by a Segment, and is not needed for a MutableSegment.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEEP_OVERHEAD

Fields inherited from class org.apache.hadoop.hbase.regionserver.Segment

FIXED_OVERHEAD, memStoreSizing, minSequenceId, tagsPresent, timeRangeTracker

Fields inherited from interface org.apache.hadoop.hbase.regionserver.MemStoreSizing

DUD

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ImmutableSegment(CellComparator comparator) ------------------------------------------------------------------------ Empty C-tor to be used only for CompositeImmutableSegment
protected	ImmutableSegment(CellComparator comparator, List<ImmutableSegment> segments)
protected	ImmutableSegment(CellSet cs, CellComparator comparator, MemStoreLAB memStoreLAB) ------------------------------------------------------------------------ C-tor to be used to build the derived classes
protected	ImmutableSegment(Segment segment) ------------------------------------------------------------------------ Copy C-tor to be used when new CSLMImmutableSegment (derived) is being built from a Mutable one.

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	canBeFlattened()
List<Segment>	getAllSegments()
int	getNumOfSegments()
int	getNumUniqueKeys()
(package private) List<KeyValueScanner>	getSnapshotScanners() We create a new SnapshotSegmentScanner to increase the reference count of MemStoreLABImpl used by this segment.
String	toString()

Methods inherited from class org.apache.hadoop.hbase.regionserver.Segment

close, compare, compareAndSetDataSize, compareRows, decScannerCount, dump, getCellLength, getCellsCount, getCellSet, getComparator, getDataSize, getHeapSize, getMemStoreLAB, getMemStoreSize, getMinSequenceId, getOffHeapSize, getScanner, getScanners, getTimeRangeTracker, headSet, heapSizeChange, incMemStoreSize, incScannerCount, indexEntryOffHeapSize, indexEntryOnHeapSize, indexEntrySize, internalAdd, isEmpty, isTagsPresent, iterator, last, maybeCloneWithAllocator, offHeapSizeChange, setCellSet, sharedLock, sharedUnlock, shouldSeek, tailSet, updateMetaInfo, updateMetaInfo, waitForUpdates

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.regionserver.MemStoreSizing

decMemStoreSize, decMemStoreSize, incMemStoreSize

Field Detail

DEEP_OVERHEAD

public static final long DEEP_OVERHEAD

Constructor Detail

ImmutableSegment

protected ImmutableSegment(CellComparator comparator)

------------------------------------------------------------------------ Empty C-tor to be used only for CompositeImmutableSegment

ImmutableSegment

protected ImmutableSegment(CellComparator comparator,
                           List<ImmutableSegment> segments)

ImmutableSegment

protected ImmutableSegment(CellSet cs,
                           CellComparator comparator,
                           MemStoreLAB memStoreLAB)

------------------------------------------------------------------------ C-tor to be used to build the derived classes

ImmutableSegment

protected ImmutableSegment(Segment segment)

------------------------------------------------------------------------ Copy C-tor to be used when new CSLMImmutableSegment (derived) is being built from a Mutable one. This C-tor should be used when active MutableSegment is pushed into the compaction pipeline and becomes an ImmutableSegment.

Method Detail

canBeFlattened

protected abstract boolean canBeFlattened()

getNumUniqueKeys

public int getNumUniqueKeys()

getNumOfSegments

public int getNumOfSegments()

getAllSegments

public List<Segment> getAllSegments()

toString

public String toString()

Overrides:

toString in class Segment

getSnapshotScanners

List<KeyValueScanner> getSnapshotScanners()

We create a new SnapshotSegmentScanner to increase the reference count of MemStoreLABImpl used by this segment.