org.apache.lucene.index
Class SnapshotDeletionPolicy.SnapshotCommitPoint

java.lang.Object
  org.apache.lucene.index.IndexCommit
      org.apache.lucene.index.SnapshotDeletionPolicy.SnapshotCommitPoint

All Implemented Interfaces:

Comparable<IndexCommit>

Enclosing class:

SnapshotDeletionPolicy

protected class SnapshotDeletionPolicy.SnapshotCommitPoint
extends IndexCommit

Wraps a provided IndexCommit and prevents it from being deleted.

Field Summary

protected IndexCommit

cp The IndexCommit we are preventing from deletion.

Constructor Summary

protected

SnapshotDeletionPolicy.SnapshotCommitPoint(IndexCommit cp) Creates a SnapshotCommitPoint wrapping the provided IndexCommit.

Method Summary

void	delete() Delete this commit point.
Directory	getDirectory() Returns the Directory for the index.
Collection<String>	getFileNames() Returns all index files referenced by this commit point.
long	getGeneration() Returns the generation (the _N in segments_N) for this IndexCommit
int	getSegmentCount() Returns number of segments referenced by this commit.
String	getSegmentsFileName() Get the segments file (segments_N) associated with this commit point.
Map<String,String>	getUserData() Returns userData, previously passed to IndexWriter.commit(Map) for this commit.
boolean	isDeleted() Returns true if this commit should be deleted; this is only used by IndexWriter after invoking the IndexDeletionPolicy.
protected boolean	shouldDelete(String segmentsFileName) Returns true if this segment can be deleted.
String	toString()

Methods inherited from class org.apache.lucene.index.IndexCommit

compareTo, equals, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

cp

protected IndexCommit cp

The IndexCommit we are preventing from deletion.

Constructor Detail

SnapshotDeletionPolicy.SnapshotCommitPoint

protected SnapshotDeletionPolicy.SnapshotCommitPoint(IndexCommit cp)

Creates a SnapshotCommitPoint wrapping the provided IndexCommit.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

shouldDelete

protected boolean shouldDelete(String segmentsFileName)

Returns true if this segment can be deleted. The default implementation returns false if this segment is currently held as snapshot.

delete

public void delete()

Description copied from class: IndexCommit

Delete this commit point. This only applies when using the commit point in the context of IndexWriter's IndexDeletionPolicy.

Upon calling this, the writer is notified that this commit point should be deleted.

Decision that a commit-point should be deleted is taken by the IndexDeletionPolicy in effect and therefore this should only be called by its onInit() or onCommit() methods.

Specified by:

delete in class IndexCommit

getDirectory

public Directory getDirectory()

Description copied from class: IndexCommit

Returns the Directory for the index.

Specified by:

getDirectory in class IndexCommit

getFileNames

public Collection<String> getFileNames()
                                throws IOException

Description copied from class: IndexCommit

Returns all index files referenced by this commit point.

Specified by:

getFileNames in class IndexCommit

Throws:

IOException

getGeneration

public long getGeneration()

Description copied from class: IndexCommit

Returns the generation (the _N in segments_N) for this IndexCommit

Specified by:

getGeneration in class IndexCommit

getSegmentsFileName

public String getSegmentsFileName()

Description copied from class: IndexCommit

Get the segments file (segments_N) associated with this commit point.

Specified by:

getSegmentsFileName in class IndexCommit

getUserData

public Map<String,String> getUserData()
                               throws IOException

Description copied from class: IndexCommit

Returns userData, previously passed to IndexWriter.commit(Map) for this commit. Map is String -> String.

Specified by:

getUserData in class IndexCommit

Throws:

IOException

isDeleted

public boolean isDeleted()

Description copied from class: IndexCommit

Returns true if this commit should be deleted; this is only used by IndexWriter after invoking the IndexDeletionPolicy.

Specified by:

isDeleted in class IndexCommit

getSegmentCount

public int getSegmentCount()

Description copied from class: IndexCommit

Returns number of segments referenced by this commit.

Specified by:

getSegmentCount in class IndexCommit