org.apache.hadoop.hbase.regionserver

类 MobStoreScanner

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.MobStoreScanner

所有已实现的接口:

Closeable, AutoCloseable, ChangedReadersObserver, InternalScanner, KeyValueScanner, Shipper

@InterfaceAudience.Private
public class MobStoreScanner
extends StoreScanner

Scanner scans both the memstore and the MOB Store. Coalesce KeyValue stream into List<KeyValue> for a single row.

字段概要

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

构造器概要

构造器

构造器和说明
MobStoreScanner(HStore store, ScanInfo scanInfo, Scan scan, NavigableSet<byte[]> columns, long readPt)

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.StoreScanner

checkFlushed, checkScanOrder, close, getEstimatedNumberOfKvsScanned, getNextIndexedKey, getReadPoint, newKVHeap, next, peek, reopenAfterFlush, reseek, resetKVHeap, seek, seekAsDirection, seekScanners, seekToNextRow, selectScannersFrom, shipped, trySkipToNextColumn, trySkipToNextRow, updateReaders

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

backwardSeek, seekToLastRow, seekToPreviousRow

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

backwardSeek, enforceSeek, getFilePath, getScannerOrder, isFileScanner, realSeekDone, requestSeek, seekToLastRow, seekToPreviousRow, shouldUseScanner

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

next

构造器详细资料

MobStoreScanner

public MobStoreScanner(HStore store,
                       ScanInfo scanInfo,
                       Scan scan,
                       NavigableSet<byte[]> columns,
                       long readPt)
                throws IOException

抛出:

IOException

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 are 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