org.apache.lucene.index

Class SegmentInfos.FindSegmentsFile

java.lang.Object

org.apache.lucene.index.SegmentInfos.FindSegmentsFile

Enclosing class:

SegmentInfos

public abstract static class SegmentInfos.FindSegmentsFile
extends Object

Utility class for executing code that needs to do something with the current segments file. This is necessary with lock-less commits because from the time you locate the current segments file name, until you actually open it, read its contents, or check modified time, etc., it could have been deleted due to a writer commit finishing.

Constructor Summary

Constructors

Constructor and Description
SegmentInfos.FindSegmentsFile(Directory directory) Sole constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract Object	doBody(String segmentFileName) Subclass must implement this.
Object	run() Locate the most recent segments file and run doBody(java.lang.String) on it.
Object	run(IndexCommit commit) Run doBody(java.lang.String) on the provided commit.

Methods inherited from class java.lang.Object

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

Constructor Detail

SegmentInfos.FindSegmentsFile

public SegmentInfos.FindSegmentsFile(Directory directory)

Sole constructor.

Method Detail

run

public Object run()
           throws IOException

Locate the most recent segments file and run doBody(java.lang.String) on it.

Throws:

IOException

run

public Object run(IndexCommit commit)
           throws IOException

Run doBody(java.lang.String) on the provided commit.

Throws:

IOException

doBody

protected abstract Object doBody(String segmentFileName)
                          throws IOException

Subclass must implement this. The assumption is an IOException will be thrown if something goes wrong during the processing that could have been caused by a writer committing.

Throws:

IOException