CompositeImmutableSegment (Apache HBase

java.lang.Object
- org.apache.hadoop.hbase.regionserver.Segment
- - org.apache.hadoop.hbase.regionserver.ImmutableSegment
  - - org.apache.hadoop.hbase.regionserver.CompositeImmutableSegment

所有已实现的接口:

MemStoreSizing
```
@InterfaceAudience.Private
public class CompositeImmutableSegment
extends ImmutableSegment
```
The CompositeImmutableSegments is created as a collection of ImmutableSegments and supports the interface of a single ImmutableSegments. The CompositeImmutableSegments is planned to be used only as a snapshot, thus only relevant interfaces are supported

字段概要
- 从类继承的字段 org.apache.hadoop.hbase.regionserver.ImmutableSegment
  DEEP_OVERHEAD
- 从类继承的字段 org.apache.hadoop.hbase.regionserver.Segment
  FIXED_OVERHEAD, memStoreSizing, minSequenceId, tagsPresent, timeRangeTracker
- 从接口继承的字段 org.apache.hadoop.hbase.regionserver.MemStoreSizing
  DUD

构造器概要

构造器
构造器和说明

CompositeImmutableSegment(CellComparator comparator, List<ImmutableSegment> segments)

构造器
构造器和说明
`CompositeImmutableSegment(CellComparator comparator, List<ImmutableSegment> segments)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`protected boolean`	`canBeFlattened()`
`void`	`close()` Closing a segment before it is being discarded
`int`	`compare(Cell left, Cell right)`
`int`	`compareRows(Cell left, Cell right)`
`void`	`decScannerCount()`
`List<Segment>`	`getAllSegments()`
`int`	`getCellsCount()`
`protected CellSet`	`getCellSet()`
`long`	`getDataSize()`
`long`	`getHeapSize()`
`long`	`getMinSequenceId()`
`int`	`getNumOfSegments()`
`KeyValueScanner`	`getScanner(long readPoint)` Creates the scanner for the given read point
`List<KeyValueScanner>`	`getScanners(long readPoint)`
`TimeRangeTracker`	`getTimeRangeTracker()`
`SortedSet<Cell>`	`headSet(Cell firstKeyOnRow)`
`long`	`incMemStoreSize(long delta, long heapOverhead, long offHeapOverhead, int cellsCount)` Updates the heap size counter of the segment by the given delta
`void`	`incScannerCount()`
`protected long`	`indexEntrySize()`
`protected void`	`internalAdd(Cell cell, boolean mslabUsed, MemStoreSizing memstoreSizing)`
`boolean`	`isEmpty()`
`boolean`	`isTagsPresent()`
`Iterator<Cell>`	`iterator()`
`Cell`	`last()`
`Cell`	`maybeCloneWithAllocator(Cell cell, boolean forceCloneOfBigCell)` If the segment has a memory allocator the cell is being cloned to this space, and returned; otherwise the given cell is returned
`protected CompositeImmutableSegment`	`setCellSet(CellSet cellSetOld, CellSet cellSetNew)` Setting the CellSet of the segment - used only for flat immutable segment for setting immutable CellSet after its creation in immutable segment constructor
`boolean`	`shouldSeek(TimeRange tr, long oldestUnexpiredTS)`
`protected SortedSet<Cell>`	`tailSet(Cell firstCell)` Returns a subset of the segment cell set, which starts with the given cell
`String`	`toString()`
`protected void`	`updateMetaInfo(Cell cellToAdd, boolean succ, boolean mslabUsed, MemStoreSizing memstoreSizing)`

从类继承的方法 org.apache.hadoop.hbase.regionserver.ImmutableSegment
getNumUniqueKeys

从类继承的方法 org.apache.hadoop.hbase.regionserver.Segment
getComparator, getMemStoreSize, getOffHeapSize, heapSizeChange, indexEntryOffHeapSize, indexEntryOnHeapSize, offHeapSizeChange, updateMetaInfo

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.apache.hadoop.hbase.regionserver.MemStoreSizing
decMemStoreSize, decMemStoreSize, incMemStoreSize

- 构造器详细资料
  - CompositeImmutableSegment
```
public CompositeImmutableSegment(CellComparator comparator,
                                 List<ImmutableSegment> segments)
```
- 方法详细资料
  - getAllSegments
```
public List<Segment> getAllSegments()
```
    覆盖:
    
    getAllSegments 在类中 ImmutableSegment
  - getNumOfSegments
```
public int getNumOfSegments()
```
    覆盖:
    
    getNumOfSegments 在类中 ImmutableSegment
  - isEmpty
```
public boolean isEmpty()
```
    覆盖:
    
    isEmpty 在类中 Segment
    
    返回:
    
    whether the segment has any cells
  - getCellsCount
```
public int getCellsCount()
```
    指定者:
    
    getCellsCount 在接口中 MemStoreSizing
    
    覆盖:
    
    getCellsCount 在类中 Segment
    
    返回:
    
    number of cells in segment
  - close
```
public void close()
```
    Closing a segment before it is being discarded
    
    覆盖:
    
    close 在类中 Segment
  - maybeCloneWithAllocator
```
public Cell maybeCloneWithAllocator(Cell cell,
                                    boolean forceCloneOfBigCell)
```
    If the segment has a memory allocator the cell is being cloned to this space, and returned; otherwise the given cell is returned
    
    覆盖:
    
    maybeCloneWithAllocator 在类中 Segment
    
    返回:
    
    either the given cell or its clone
  - shouldSeek
```
public boolean shouldSeek(TimeRange tr,
                          long oldestUnexpiredTS)
```
    覆盖:
    
    shouldSeek 在类中 Segment
  - getScanner
```
public KeyValueScanner getScanner(long readPoint)
```
    Creates the scanner for the given read point
    
    覆盖:
    
    getScanner 在类中 Segment
    
    返回:
    
    a scanner for the given read point
  - getScanners
```
public List<KeyValueScanner> getScanners(long readPoint)
```
    覆盖:
    
    getScanners 在类中 Segment
  - isTagsPresent
```
public boolean isTagsPresent()
```
    覆盖:
    
    isTagsPresent 在类中 Segment
  - incScannerCount
```
public void incScannerCount()
```
    覆盖:
    
    incScannerCount 在类中 Segment
  - decScannerCount
```
public void decScannerCount()
```
    覆盖:
    
    decScannerCount 在类中 Segment
  - setCellSet
```
protected CompositeImmutableSegment setCellSet(CellSet cellSetOld,
                                               CellSet cellSetNew)
```
    Setting the CellSet of the segment - used only for flat immutable segment for setting immutable CellSet after its creation in immutable segment constructor
    
    覆盖:
    
    setCellSet 在类中 Segment
    
    返回:
    
    this object
  - indexEntrySize
```
protected long indexEntrySize()
```
    指定者:
    
    indexEntrySize 在类中 Segment
  - canBeFlattened
```
protected boolean canBeFlattened()
```
    指定者:
    
    canBeFlattened 在类中 ImmutableSegment
  - getDataSize
```
public long getDataSize()
```
    指定者:
    
    getDataSize 在接口中 MemStoreSizing
    
    覆盖:
    
    getDataSize 在类中 Segment
    
    返回:
    
    Sum of all cell sizes.
  - getHeapSize
```
public long getHeapSize()
```
    指定者:
    
    getHeapSize 在接口中 MemStoreSizing
    
    覆盖:
    
    getHeapSize 在类中 Segment
    
    返回:
    
    The heap size of this segment.
  - incMemStoreSize
```
public long incMemStoreSize(long delta,
                            long heapOverhead,
                            long offHeapOverhead,
                            int cellsCount)
```
    Updates the heap size counter of the segment by the given delta
    
    指定者:
    
    incMemStoreSize 在接口中 MemStoreSizing
    
    覆盖:
    
    incMemStoreSize 在类中 Segment
    
    返回:
    
    The new dataSize ONLY as a convenience
  - getMinSequenceId
```
public long getMinSequenceId()
```
    覆盖:
    
    getMinSequenceId 在类中 Segment
  - getTimeRangeTracker
```
public TimeRangeTracker getTimeRangeTracker()
```
    覆盖:
    
    getTimeRangeTracker 在类中 Segment
  - last
```
public Cell last()
```
    覆盖:
    
    last 在类中 Segment
  - iterator
```
public Iterator<Cell> iterator()
```
    覆盖:
    
    iterator 在类中 Segment
  - headSet
```
public SortedSet<Cell> headSet(Cell firstKeyOnRow)
```
    覆盖:
    
    headSet 在类中 Segment
  - compare
```
public int compare(Cell left,
                   Cell right)
```
    覆盖:
    
    compare 在类中 Segment
  - compareRows
```
public int compareRows(Cell left,
                       Cell right)
```
    覆盖:
    
    compareRows 在类中 Segment
  - getCellSet
```
protected CellSet getCellSet()
```
    覆盖:
    
    getCellSet 在类中 Segment
    
    返回:
    
    a set of all cells in the segment
  - internalAdd
```
protected void internalAdd(Cell cell,
                           boolean mslabUsed,
                           MemStoreSizing memstoreSizing)
```
    覆盖:
    
    internalAdd 在类中 Segment
  - updateMetaInfo
```
protected void updateMetaInfo(Cell cellToAdd,
                              boolean succ,
                              boolean mslabUsed,
                              MemStoreSizing memstoreSizing)
```
    覆盖:
    
    updateMetaInfo 在类中 Segment
  - tailSet
```
protected SortedSet<Cell> tailSet(Cell firstCell)
```
    Returns a subset of the segment cell set, which starts with the given cell
    
    覆盖:
    
    tailSet 在类中 Segment
    
    参数:
    
    firstCell - a cell in the segment
    
    返回:
    
    a subset of the segment cell set, which starts with the given cell
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 ImmutableSegment

类 CompositeImmutableSegment

字段概要

从类继承的字段 org.apache.hadoop.hbase.regionserver.ImmutableSegment

从类继承的字段 org.apache.hadoop.hbase.regionserver.Segment

从接口继承的字段 org.apache.hadoop.hbase.regionserver.MemStoreSizing

构造器概要

方法概要

从类继承的方法 org.apache.hadoop.hbase.regionserver.ImmutableSegment

从类继承的方法 org.apache.hadoop.hbase.regionserver.Segment

从类继承的方法 java.lang.Object

从接口继承的方法 org.apache.hadoop.hbase.regionserver.MemStoreSizing

构造器详细资料

CompositeImmutableSegment

方法详细资料

getAllSegments

getNumOfSegments

isEmpty

getCellsCount

close

maybeCloneWithAllocator

shouldSeek

getScanner

getScanners

isTagsPresent

incScannerCount

decScannerCount

setCellSet

indexEntrySize

canBeFlattened

getDataSize

getHeapSize

incMemStoreSize

getMinSequenceId

getTimeRangeTracker

last

iterator

headSet

compare

compareRows

getCellSet

internalAdd

updateMetaInfo

tailSet

toString