org.apache.hadoop.hbase.regionserver

Class DefaultStoreFlusher

java.lang.Object

org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher

@InterfaceAudience.Private
public class DefaultStoreFlusher
extends Object

Default implementation of StoreFlusher.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.hadoop.conf.Configuration	conf
protected Store	store

Constructor Summary

Constructors

Constructor and Description
DefaultStoreFlusher(org.apache.hadoop.conf.Configuration conf, Store store)

Method Summary

Methods

Modifier and Type	Method and Description
protected InternalScanner	createScanner(SortedSet<KeyValue> snapshot, long smallestReadPoint) Creates the scanner for flushing snapshot.
protected void	finalizeWriter(StoreFile.Writer writer, long cacheFlushSeqNum, MonitoredTask status)
List<org.apache.hadoop.fs.Path>	flushSnapshot(SortedSet<KeyValue> snapshot, long cacheFlushId, TimeRangeTracker snapshotTimeRangeTracker, AtomicLong flushedSize, MonitoredTask status) Turns a snapshot of memstore into a set of store files.
protected long	performFlush(InternalScanner scanner, Compactor.CellSink sink, long smallestReadPoint) Performs memstore flush, writing data from scanner into sink.

Methods inherited from class java.lang.Object

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

Field Detail

conf

protected org.apache.hadoop.conf.Configuration conf

store

protected Store store

Constructor Detail

DefaultStoreFlusher

public DefaultStoreFlusher(org.apache.hadoop.conf.Configuration conf,
                   Store store)

Method Detail

flushSnapshot

public List<org.apache.hadoop.fs.Path> flushSnapshot(SortedSet<KeyValue> snapshot,
                                            long cacheFlushId,
                                            TimeRangeTracker snapshotTimeRangeTracker,
                                            AtomicLong flushedSize,
                                            MonitoredTask status)
                                              throws IOException

Turns a snapshot of memstore into a set of store files.

Parameters:

snapshot - Memstore snapshot.

cacheFlushId - Log cache flush sequence number.

snapshotTimeRangeTracker - Time range tracker from the memstore pertaining to the snapshot.

flushedSize - Out parameter for the size of the KVs flushed.

status - Task that represents the flush operation and may be updated with status.

Returns:

List of files written. Can be empty; must not be null.

Throws:

IOException

finalizeWriter

protected void finalizeWriter(StoreFile.Writer writer,
                  long cacheFlushSeqNum,
                  MonitoredTask status)
                       throws IOException

Throws:

IOException

createScanner

protected InternalScanner createScanner(SortedSet<KeyValue> snapshot,
                            long smallestReadPoint)
                                 throws IOException

Creates the scanner for flushing snapshot. Also calls coprocessors.

Returns:

The scanner; null if coprocessor is canceling the flush.

Throws:

IOException

performFlush

protected long performFlush(InternalScanner scanner,
                Compactor.CellSink sink,
                long smallestReadPoint)
                     throws IOException

Performs memstore flush, writing data from scanner into sink.

Parameters:

scanner - Scanner to get data from.

sink - Sink to write data to. Could be StoreFile.Writer.

smallestReadPoint - Smallest read point used for the flush.

Returns:

Bytes flushed.

Throws:

IOException