org.apache.lucene.index
Class MockRandomMergePolicy

java.lang.Object
  org.apache.lucene.index.MergePolicy
      org.apache.lucene.index.MockRandomMergePolicy

All Implemented Interfaces:

Closeable

public class MockRandomMergePolicy
extends MergePolicy

MergePolicy that makes random decisions for testing.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.MergePolicy

MergePolicy.MergeAbortedException, MergePolicy.MergeException, MergePolicy.MergeSpecification, MergePolicy.OneMerge

Field Summary

Fields inherited from class org.apache.lucene.index.MergePolicy

writer

Constructor Summary

MockRandomMergePolicy(Random random)

Method Summary

void	close() Release all resources for the policy.
MergePolicy.MergeSpecification	findForcedDeletesMerges(SegmentInfos segmentInfos) Determine what set of merge operations is necessary in order to expunge all deletes from the index.
MergePolicy.MergeSpecification	findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentInfo,Boolean> segmentsToMerge) Determine what set of merge operations is necessary in order to merge to <= the specified segment count.
MergePolicy.MergeSpecification	findMerges(SegmentInfos segmentInfos) Determine what set of merge operations are now necessary on the index.
boolean	useCompoundFile(SegmentInfos infos, SegmentInfo mergedInfo) Returns true if a new segment (regardless of its origin) should use the compound file format.

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

setIndexWriter

Methods inherited from class java.lang.Object

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

Constructor Detail

MockRandomMergePolicy

public MockRandomMergePolicy(Random random)

Method Detail

findMerges

public MergePolicy.MergeSpecification findMerges(SegmentInfos segmentInfos)

Description copied from class: MergePolicy

Determine what set of merge operations are now necessary on the index. IndexWriter calls this whenever there is a change to the segments. This call is always synchronized on the IndexWriter instance so only one thread at a time will call this method.

Specified by:

findMerges in class MergePolicy

Parameters:

segmentInfos - the total set of segments in the index

findForcedMerges

public MergePolicy.MergeSpecification findForcedMerges(SegmentInfos segmentInfos,
                                                       int maxSegmentCount,
                                                       Map<SegmentInfo,Boolean> segmentsToMerge)
                                                throws CorruptIndexException,
                                                       IOException

Description copied from class: MergePolicy

Determine what set of merge operations is necessary in order to merge to <= the specified segment count. IndexWriter calls this when its IndexWriter.forceMerge(int) method is called. This call is always synchronized on the IndexWriter instance so only one thread at a time will call this method.

Specified by:

findForcedMerges in class MergePolicy

Parameters:

segmentInfos - the total set of segments in the index

maxSegmentCount - requested maximum number of segments in the index (currently this is always 1)

segmentsToMerge - contains the specific SegmentInfo instances that must be merged away. This may be a subset of all SegmentInfos. If the value is True for a given SegmentInfo, that means this segment was an original segment present in the to-be-merged index; else, it was a segment produced by a cascaded merge.

Throws:

CorruptIndexException

IOException

findForcedDeletesMerges

public MergePolicy.MergeSpecification findForcedDeletesMerges(SegmentInfos segmentInfos)
                                                       throws CorruptIndexException,
                                                              IOException

Description copied from class: MergePolicy

Determine what set of merge operations is necessary in order to expunge all deletes from the index.

Specified by:

findForcedDeletesMerges in class MergePolicy

Parameters:

segmentInfos - the total set of segments in the index

Throws:

CorruptIndexException

IOException

close

public void close()

Description copied from class: MergePolicy

Release all resources for the policy.

Specified by:

close in interface Closeable

Specified by:

close in class MergePolicy

useCompoundFile

public boolean useCompoundFile(SegmentInfos infos,
                               SegmentInfo mergedInfo)
                        throws IOException

Description copied from class: MergePolicy

Returns true if a new segment (regardless of its origin) should use the compound file format.

Specified by:

useCompoundFile in class MergePolicy

Throws:

IOException