org.apache.lucene.index

Class IndexWriter.ReaderPool

java.lang.Object

org.apache.lucene.index.IndexWriter.ReaderPool

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Enclosing class:

IndexWriter

class IndexWriter.ReaderPool
extends java.lang.Object
implements java.io.Closeable

Holds shared SegmentReader instances. IndexWriter uses SegmentReaders for 1) applying deletes, 2) doing merges, 3) handing out a real-time reader. This pool reuses instances of the SegmentReaders in all these places if it is in "near real-time mode" (getReader() has been called on this instance).

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<SegmentCommitInfo,ReadersAndUpdates>	readerMap

Constructor Summary

Constructors

Constructor and Description
ReaderPool()

Method Summary

Modifier and Type	Method and Description
boolean	anyPendingDeletes()
void	close()
void	commit(SegmentInfos infos) Commit live docs changes for the segment readers for the provided infos.
void	drop(SegmentCommitInfo info)
(package private) void	dropAll(boolean doSave) Remove all our references to readers, and commits any pending changes.
ReadersAndUpdates	get(SegmentCommitInfo info, boolean create) Obtain a ReadersAndLiveDocs instance from the readerPool.
boolean	infoIsLive(SegmentCommitInfo info)
private boolean	noDups()
void	release(ReadersAndUpdates rld)
void	release(ReadersAndUpdates rld, boolean assertInfoLive)

Methods inherited from class java.lang.Object

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

Field Detail

readerMap

private final java.util.Map<SegmentCommitInfo,ReadersAndUpdates> readerMap

Constructor Detail

ReaderPool

ReaderPool()

Method Detail

infoIsLive

public boolean infoIsLive(SegmentCommitInfo info)

drop

public void drop(SegmentCommitInfo info)
          throws java.io.IOException

Throws:

java.io.IOException

anyPendingDeletes

public boolean anyPendingDeletes()

release

public void release(ReadersAndUpdates rld)
             throws java.io.IOException

Throws:

java.io.IOException

release

public void release(ReadersAndUpdates rld,
                    boolean assertInfoLive)
             throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.io.IOException

dropAll

void dropAll(boolean doSave)
      throws java.io.IOException

Remove all our references to readers, and commits any pending changes.

Throws:

java.io.IOException

commit

public void commit(SegmentInfos infos)
            throws java.io.IOException

Commit live docs changes for the segment readers for the provided infos.

Throws:

java.io.IOException - If there is a low-level I/O error

get

public ReadersAndUpdates get(SegmentCommitInfo info,
                             boolean create)

Obtain a ReadersAndLiveDocs instance from the readerPool. If create is true, you must later call release(ReadersAndUpdates).

noDups

private boolean noDups()