org.apache.hadoop.hbase.regionserver

类 ReversedMobStoreScanner

java.lang.Object

org.apache.hadoop.hbase.regionserver.NonLazyKeyValueScanner

org.apache.hadoop.hbase.regionserver.NonReversedNonLazyKeyValueScanner

org.apache.hadoop.hbase.regionserver.StoreScanner

org.apache.hadoop.hbase.regionserver.ReversedStoreScanner

org.apache.hadoop.hbase.regionserver.ReversedMobStoreScanner

所有已实现的接口:

Closeable, AutoCloseable, ChangedReadersObserver, InternalScanner, KeyValueScanner, Shipper

@InterfaceAudience.Private
public class ReversedMobStoreScanner
extends ReversedStoreScanner

ReversedMobStoreScanner extends from ReversedStoreScanner, and is used to support reversed scanning in both the memstore and the MOB store.

字段概要

字段

限定符和类型	字段和说明
protected HMobStore	mobStore

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

DEFAULT_HBASE_CELLS_SCANNED_PER_HEARTBEAT_CHECK, HBASE_CELLS_SCANNED_PER_HEARTBEAT_CHECK, heap, readPt, store, STORESCANNER_PARALLEL_SEEK_ENABLE, STORESCANNER_PREAD_MAX_BYTES

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

NO_NEXT_INDEXED_KEY

方法概要

限定符和类型	方法和说明
boolean	next(List<Cell> outResult, ScannerContext ctx) Firstly reads the cells from the HBase.

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

backwardSeek, checkScanOrder, newKVHeap, reseek, seek, seekAsDirection, seekScanners, seekToNextRow, seekToPreviousRow

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

checkFlushed, close, getEstimatedNumberOfKvsScanned, getNextIndexedKey, getReadPoint, next, peek, reopenAfterFlush, resetKVHeap, selectScannersFrom, shipped, trySkipToNextColumn, trySkipToNextRow, updateReaders

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

seekToLastRow

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

doRealSeek, enforceSeek, getFilePath, isFileScanner, realSeekDone, requestSeek, shouldUseScanner

从类继承的方法 java.lang.Object

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

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

close, enforceSeek, getFilePath, getNextIndexedKey, getScannerOrder, isFileScanner, next, peek, realSeekDone, requestSeek, seekToLastRow, shouldUseScanner

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

shipped

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

next

字段详细资料

mobStore

protected final HMobStore mobStore

方法详细资料

next

public boolean next(List<Cell> outResult,
                    ScannerContext ctx)
             throws IOException

Firstly reads the cells from the HBase. If the cell is a reference cell (which has the reference tag), the scanner need seek this cell from the mob file, and use the cell found from the mob file as the result.

指定者:

next 在接口中 InternalScanner

覆盖:

next 在类中 StoreScanner

参数:

outResult - return output array

返回:

true if there are more rows, false if scanner is done

抛出:

IOException - e