org.hibernate.search.indexes.impl

Class SharingBufferReaderProvider

java.lang.Object

org.hibernate.search.indexes.impl.SharingBufferReaderProvider

All Implemented Interfaces:

DirectoryBasedReaderProvider, ReaderProvider

public class SharingBufferReaderProvider
extends Object
implements DirectoryBasedReaderProvider

This ReaderProvider shares IndexReaders as long as they are "current"; It uses IndexReader.reopen() which should improve performance on larger indexes as it shares buffers with previous IndexReader generation for the segments which didn't change.

Author:

Sanne Grinovero (C) 2011 Red Hat Inc.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	SharingBufferReaderProvider.PerDirectoryLatestReader An instance for each DirectoryProvider, establishing the association between "current" ReaderUsagePair for a DirectoryProvider and it's lock.
protected class	SharingBufferReaderProvider.ReaderUsagePair Container for the couple IndexReader,UsageCounter.

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<IndexReader,SharingBufferReaderProvider.ReaderUsagePair>	allReaders contains all Readers (most current per Directory and all unclosed old readers)
protected Map<Directory,SharingBufferReaderProvider.PerDirectoryLatestReader>	currentReaders contains last updated Reader; protected by lockOnOpenLatest (in the values)

Constructor Summary

Constructors

Constructor and Description
SharingBufferReaderProvider()

Method Summary

Modifier and Type	Method and Description
void	closeIndexReader(IndexReader reader)
void	initialize(DirectoryBasedIndexManager indexManager, Properties props)
DirectoryReader	openIndexReader()
protected DirectoryReader	readerFactory(Directory directory)
void	stop()

Methods inherited from class java.lang.Object

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

Field Detail

allReaders

protected final Map<IndexReader,SharingBufferReaderProvider.ReaderUsagePair> allReaders

contains all Readers (most current per Directory and all unclosed old readers)

currentReaders

protected final Map<Directory,SharingBufferReaderProvider.PerDirectoryLatestReader> currentReaders

contains last updated Reader; protected by lockOnOpenLatest (in the values)

Constructor Detail

SharingBufferReaderProvider

public SharingBufferReaderProvider()

Method Detail

openIndexReader

public DirectoryReader openIndexReader()

Specified by:

openIndexReader in interface ReaderProvider

closeIndexReader

public void closeIndexReader(IndexReader reader)

Specified by:

closeIndexReader in interface ReaderProvider

initialize

public void initialize(DirectoryBasedIndexManager indexManager,
                       Properties props)

Specified by:

initialize in interface DirectoryBasedReaderProvider

stop

public void stop()

Specified by:

stop in interface DirectoryBasedReaderProvider

readerFactory

protected DirectoryReader readerFactory(Directory directory)
                                 throws IOException

Throws:

IOException