public virtual void TestMerge()
{
//System.out.println("----------------TestMerge------------------");
SegmentMerger merger = new SegmentMerger(mergedDir, mergedSegment, false);
merger.Add(reader1);
merger.Add(reader2);
try
{
int docsMerged = merger.Merge();
merger.CloseReaders();
Assert.IsTrue(docsMerged == 2);
//Should be able to open a new SegmentReader against the new directory
SegmentReader mergedReader = new SegmentReader(new SegmentInfo(mergedSegment, docsMerged, mergedDir));
Assert.IsTrue(mergedReader != null);
Assert.IsTrue(mergedReader.NumDocs() == 2);
Document newDoc1 = mergedReader.Document(0);
Assert.IsTrue(newDoc1 != null);
//There are 2 unstored fields on the document
Assert.IsTrue(DocHelper.NumFields(newDoc1) == DocHelper.NumFields(doc1) - 2);
Document newDoc2 = mergedReader.Document(1);
Assert.IsTrue(newDoc2 != null);
Assert.IsTrue(DocHelper.NumFields(newDoc2) == DocHelper.NumFields(doc2) - 2);
TermDocs termDocs = mergedReader.TermDocs(new Term(DocHelper.TEXT_FIELD_2_KEY, "Field"));
Assert.IsTrue(termDocs != null);
Assert.IsTrue(termDocs.Next() == true);
System.Collections.ICollection stored = mergedReader.GetIndexedFieldNames(true);
Assert.IsTrue(stored != null);
//System.out.println("stored size: " + stored.size());
Assert.IsTrue(stored.Count == 2);
TermFreqVector vector = mergedReader.GetTermFreqVector(0, DocHelper.TEXT_FIELD_2_KEY);
Assert.IsTrue(vector != null);
System.String[] terms = vector.GetTerms();
Assert.IsTrue(terms != null);
//System.out.println("Terms size: " + terms.length);
Assert.IsTrue(terms.Length == 3);
int[] freqs = vector.GetTermFrequencies();
Assert.IsTrue(freqs != null);
//System.out.println("Freqs size: " + freqs.length);
for (int i = 0; i < terms.Length; i++)
{
System.String term = terms[i];
int freq = freqs[i];
//System.out.println("Term: " + term + " Freq: " + freq);
Assert.IsTrue(DocHelper.FIELD_2_TEXT.IndexOf(term) != -1);
Assert.IsTrue(DocHelper.FIELD_2_FREQS[i] == freq);
}
}
catch (System.IO.IOException e)
{
System.Console.Error.WriteLine(e.StackTrace);
Assert.IsTrue(false);
}
//System.out.println("---------------------end TestMerge-------------------");
}
public virtual void TestMerge()
{
SegmentMerger merger = new SegmentMerger(mergedDir, mergedSegment);
merger.Add(reader1);
merger.Add(reader2);
int docsMerged = merger.Merge();
merger.CloseReaders();
Assert.IsTrue(docsMerged == 2);
//Should be able to open a new SegmentReader against the new directory
SegmentReader mergedReader = SegmentReader.Get(new SegmentInfo(mergedSegment, docsMerged, mergedDir, false, true));
Assert.IsTrue(mergedReader != null);
Assert.IsTrue(mergedReader.NumDocs() == 2);
Document newDoc1 = mergedReader.Document(0);
Assert.IsTrue(newDoc1 != null);
//There are 2 unstored fields on the document
Assert.IsTrue(DocHelper.NumFields(newDoc1) == DocHelper.NumFields(doc1) - DocHelper.unstored.Count);
Document newDoc2 = mergedReader.Document(1);
Assert.IsTrue(newDoc2 != null);
Assert.IsTrue(DocHelper.NumFields(newDoc2) == DocHelper.NumFields(doc2) - DocHelper.unstored.Count);
TermDocs termDocs = mergedReader.TermDocs(new Term(DocHelper.TEXT_FIELD_2_KEY, "field"));
Assert.IsTrue(termDocs != null);
Assert.IsTrue(termDocs.Next() == true);
System.Collections.Generic.ICollection <string> stored = mergedReader.GetFieldNames(IndexReader.FieldOption.INDEXED_WITH_TERMVECTOR);
Assert.IsTrue(stored != null);
//System.out.println("stored size: " + stored.size());
Assert.IsTrue(stored.Count == 4, "We do not have 4 fields that were indexed with term vector");
TermFreqVector vector = mergedReader.GetTermFreqVector(0, DocHelper.TEXT_FIELD_2_KEY);
Assert.IsTrue(vector != null);
System.String[] terms = vector.GetTerms();
Assert.IsTrue(terms != null);
//System.out.println("Terms size: " + terms.length);
Assert.IsTrue(terms.Length == 3);
int[] freqs = vector.GetTermFrequencies();
Assert.IsTrue(freqs != null);
//System.out.println("Freqs size: " + freqs.length);
Assert.IsTrue(vector is TermPositionVector == true);
for (int i = 0; i < terms.Length; i++)
{
System.String term = terms[i];
int freq = freqs[i];
//System.out.println("Term: " + term + " Freq: " + freq);
Assert.IsTrue(DocHelper.FIELD_2_TEXT.IndexOf(term) != -1);
Assert.IsTrue(DocHelper.FIELD_2_FREQS[i] == freq);
}
TestSegmentReader.CheckNorms(mergedReader);
}
public virtual void TestMerge()
{
//System.out.println("----------------TestMerge------------------");
SegmentMerger merger = new SegmentMerger(mergedDir, mergedSegment, false);
merger.Add(reader1);
merger.Add(reader2);
try
{
int docsMerged = merger.Merge();
merger.CloseReaders();
Assert.IsTrue(docsMerged == 2);
//Should be able to open a new SegmentReader against the new directory
SegmentReader mergedReader = new SegmentReader(new SegmentInfo(mergedSegment, docsMerged, mergedDir));
Assert.IsTrue(mergedReader != null);
Assert.IsTrue(mergedReader.NumDocs() == 2);
Document newDoc1 = mergedReader.Document(0);
Assert.IsTrue(newDoc1 != null);
//There are 2 unstored fields on the document
Assert.IsTrue(DocHelper.NumFields(newDoc1) == DocHelper.NumFields(doc1) - 2);
Document newDoc2 = mergedReader.Document(1);
Assert.IsTrue(newDoc2 != null);
Assert.IsTrue(DocHelper.NumFields(newDoc2) == DocHelper.NumFields(doc2) - 2);
TermDocs termDocs = mergedReader.TermDocs(new Term(DocHelper.TEXT_FIELD_2_KEY, "Field"));
Assert.IsTrue(termDocs != null);
Assert.IsTrue(termDocs.Next() == true);
System.Collections.ICollection stored = mergedReader.GetIndexedFieldNames(true);
Assert.IsTrue(stored != null);
//System.out.println("stored size: " + stored.size());
Assert.IsTrue(stored.Count == 2);
TermFreqVector vector = mergedReader.GetTermFreqVector(0, DocHelper.TEXT_FIELD_2_KEY);
Assert.IsTrue(vector != null);
System.String[] terms = vector.GetTerms();
Assert.IsTrue(terms != null);
//System.out.println("Terms size: " + terms.length);
Assert.IsTrue(terms.Length == 3);
int[] freqs = vector.GetTermFrequencies();
Assert.IsTrue(freqs != null);
//System.out.println("Freqs size: " + freqs.length);
for (int i = 0; i < terms.Length; i++)
{
System.String term = terms[i];
int freq = freqs[i];
//System.out.println("Term: " + term + " Freq: " + freq);
Assert.IsTrue(DocHelper.FIELD_2_TEXT.IndexOf(term) != - 1);
Assert.IsTrue(DocHelper.FIELD_2_FREQS[i] == freq);
}
}
catch (System.IO.IOException e)
{
System.Console.Error.WriteLine(e.StackTrace);
Assert.IsTrue(false);
}
//System.out.println("---------------------end TestMerge-------------------");
}
/// <summary>Merges the provided indexes into this index.
/// <p>After this completes, the index is optimized. </p>
/// <p>The provided IndexReaders are not closed.</p>
/// </summary>
public virtual void AddIndexes(IndexReader[] readers)
{
lock (this)
{
Optimize(); // start with zero or 1 seg
System.String mergedName = NewSegmentName();
SegmentMerger merger = new SegmentMerger(this, mergedName);
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
IndexReader sReader = null;
if (segmentInfos.Count == 1)
{
// add existing index, if any
sReader = SegmentReader.Get(segmentInfos.Info(0));
merger.Add(sReader);
segmentsToDelete.Add(sReader); // queue segment for deletion
}
for (int i = 0; i < readers.Length; i++)
{
// add new indexes
merger.Add(readers[i]);
}
int docCount = merger.Merge(); // merge 'em
segmentInfos.RemoveRange(0, segmentInfos.Count); // pop old infos & add new
segmentInfos.Add(new SegmentInfo(mergedName, docCount, directory));
if (sReader != null)
{
sReader.Close();
}
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith1(this, directory.MakeLock(COMMIT_LOCK_NAME), commitLockTimeout).Run();
}
DeleteSegments(segmentsToDelete); // delete now-unused segments
if (useCompoundFile)
{
System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(mergedName + ".tmp");
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith2(mergedName, this, directory.MakeLock(COMMIT_LOCK_NAME), commitLockTimeout).Run();
}
// delete now unused files of segment
DeleteFiles(filesToDelete);
}
}
}
internal static void Merge(System.String seg1, System.String seg2, System.String merged)
{
Directory directory = FSDirectory.GetDirectory("test", false);
SegmentReader r1 = new SegmentReader(new SegmentInfo(seg1, 1, directory));
SegmentReader r2 = new SegmentReader(new SegmentInfo(seg2, 1, directory));
SegmentMerger merger = new SegmentMerger(directory, merged, false);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
directory.Close();
}
private void Merge(System.String seg1, System.String seg2, System.String merged, bool useCompoundFile)
{
Directory directory = FSDirectory.GetDirectory(indexDir, false);
SegmentReader r1 = new SegmentReader(new SegmentInfo(seg1, 1, directory));
SegmentReader r2 = new SegmentReader(new SegmentInfo(seg2, 1, directory));
SegmentMerger merger = new SegmentMerger(directory, merged, useCompoundFile);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
directory.Close();
}
internal static void Merge(System.String seg1, System.String seg2, System.String merged)
{
Directory directory = FSDirectory.GetDirectory("test", false);
SegmentReader r1 = new SegmentReader(new SegmentInfo(seg1, 1, directory));
SegmentReader r2 = new SegmentReader(new SegmentInfo(seg2, 1, directory));
SegmentMerger merger = new SegmentMerger(directory, merged, false);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
directory.Close();
}
/// <summary>Merges the named range of segments, replacing them in the stack with a
/// single segment.
/// </summary>
private void MergeSegments(int minSegment, int end)
{
System.String mergedName = NewSegmentName();
if (infoStream != null)
{
infoStream.Write("merging segments");
}
SegmentMerger merger = new SegmentMerger(this, mergedName);
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
for (int i = minSegment; i < end; i++)
{
SegmentInfo si = segmentInfos.Info(i);
if (infoStream != null)
{
infoStream.Write(" " + si.name + " (" + si.docCount + " docs)");
}
IndexReader reader = SegmentReader.Get(si);
merger.Add(reader);
if ((reader.Directory() == this.directory) || (reader.Directory() == this.ramDirectory))
{
segmentsToDelete.Add(reader); // queue segment for deletion
}
}
int mergedDocCount = merger.Merge();
if (infoStream != null)
{
infoStream.WriteLine(" into " + mergedName + " (" + mergedDocCount + " docs)");
}
for (int i = end - 1; i >= minSegment; i--)
{
// remove old infos & add new
segmentInfos.RemoveAt(i);
}
segmentInfos.Add(new SegmentInfo(mergedName, mergedDocCount, directory));
// close readers before we attempt to delete now-obsolete segments
merger.CloseReaders();
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith3(segmentsToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
if (useCompoundFile)
{
System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(mergedName + ".tmp");
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith4(mergedName, filesToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
}
}
private SegmentInfo Merge(SegmentInfo si1, SegmentInfo si2, System.String merged, bool useCompoundFile)
{
SegmentReader r1 = SegmentReader.Get(true, si1, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR, null);
SegmentReader r2 = SegmentReader.Get(true, si2, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR, null);
SegmentMerger merger = new SegmentMerger(si1.dir, merged);
merger.Add(r1);
merger.Add(r2);
merger.Merge(null);
merger.CloseReaders();
if (useCompoundFile)
{
System.Collections.Generic.ICollection <string> filesToDelete = merger.CreateCompoundFile(merged + ".cfs");
for (System.Collections.IEnumerator iter = filesToDelete.GetEnumerator(); iter.MoveNext();)
{
si1.dir.DeleteFile((System.String)iter.Current, null);
}
}
return(new SegmentInfo(merged, si1.docCount + si2.docCount, si1.dir, useCompoundFile, true));
}
private SegmentInfo Merge(SegmentInfo si1, SegmentInfo si2, System.String merged, bool useCompoundFile)
{
SegmentReader r1 = SegmentReader.Get(si1);
SegmentReader r2 = SegmentReader.Get(si2);
SegmentMerger merger = new SegmentMerger(si1.dir, merged);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
if (useCompoundFile)
{
System.Collections.IList filesToDelete = merger.CreateCompoundFile(merged + ".cfs");
for (System.Collections.IEnumerator iter = filesToDelete.GetEnumerator(); iter.MoveNext();)
{
si1.dir.DeleteFile((System.String)iter.Current);
}
}
return(new SegmentInfo(merged, si1.docCount + si2.docCount, si1.dir, useCompoundFile, true));
}
/** Does the actual (time-consuming) work of the merge,
* but without holding synchronized lock on IndexWriter
* instance */
private int MergeMiddle(MergePolicy.OneMerge merge)
{
merge.CheckAborted(directory);
string mergedName = merge.info.name;
SegmentMerger merger = null;
int mergedDocCount = 0;
SegmentInfos sourceSegments = merge.segments;
SegmentInfos sourceSegmentsClone = merge.segmentsClone;
int numSegments = sourceSegments.Count;
if (infoStream != null)
Message("merging " + merge.SegString(directory));
merger = new SegmentMerger(this, mergedName, merge);
bool success = false;
// This is try/finally to make sure merger's readers are
// closed:
try
{
int totDocCount = 0;
for (int i = 0; i < numSegments; i++)
{
SegmentInfo si = sourceSegmentsClone.Info(i);
IndexReader reader = SegmentReader.Get(true, si, MERGE_READ_BUFFER_SIZE, merge.mergeDocStores); // no need to set deleter (yet)
merger.Add(reader);
totDocCount += reader.NumDocs();
}
if (infoStream != null)
{
Message("merge: total " + totDocCount + " docs");
}
merge.CheckAborted(directory);
// This is where all the work happens:
mergedDocCount = merge.info.docCount = merger.Merge(merge.mergeDocStores);
System.Diagnostics.Debug.Assert(mergedDocCount == totDocCount);
success = true;
}
finally
{
// close readers before we attempt to delete
// now-obsolete segments
if (merger != null)
{
merger.CloseReaders();
}
}
if (!CommitMerge(merge, merger, mergedDocCount))
// commitMerge will return false if this merge was aborted
return 0;
if (merge.useCompoundFile)
{
// Maybe force a sync here to allow reclaiming of the
// disk space used by the segments we just merged:
if (autoCommit && DoCommitBeforeMergeCFS(merge))
{
long size;
lock (this)
{
size = merge.info.SizeInBytes();
}
Commit(size);
}
success = false;
string compoundFileName = mergedName + "." + IndexFileNames.COMPOUND_FILE_EXTENSION;
try
{
merger.CreateCompoundFile(compoundFileName);
success = true;
}
catch (System.IO.IOException ioe)
{
lock (this)
{
if (merge.IsAborted())
{
// This can happen if rollback or close(false)
// is called -- fall through to logic below to
// remove the partially created CFS:
success = true;
}
else
HandleMergeException(ioe, merge);
}
}
catch (System.Exception t)
{
HandleMergeException(t, merge);
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception creating compound file during merge");
lock (this)
{
deleter.DeleteFile(compoundFileName);
}
}
}
if (merge.IsAborted())
{
if (infoStream != null)
Message("abort merge after building CFS");
deleter.DeleteFile(compoundFileName);
return 0;
}
lock (this)
{
if (segmentInfos.IndexOf(merge.info) == -1 || merge.IsAborted())
{
// Our segment (committed in non-compound
// format) got merged away while we were
// building the compound format.
deleter.DeleteFile(compoundFileName);
}
else
{
merge.info.SetUseCompoundFile(true);
Checkpoint();
}
}
}
// Force a sync after commiting the merge. Once this
// sync completes then all index files referenced by the
// current segmentInfos are on stable storage so if the
// OS/machine crashes, or power cord is yanked, the
// index will be intact. Note that this is just one
// (somewhat arbitrary) policy; we could try other
// policies like only sync if it's been > X minutes or
// more than Y bytes have been written, etc.
if (autoCommit)
{
long size;
lock (this)
{
size = merge.info.SizeInBytes();
}
Commit(size);
}
return mergedDocCount;
}
/// <summary> Merges the provided indexes into this index.
/// <p>
/// After this completes, the index is optimized.
/// </p>
/// <p>
/// The provided IndexReaders are not closed.
/// </p>
///
/// <p>
/// See {@link #AddIndexes(Directory[])} for details on transactional
/// semantics, temporary free space required in the Directory, and non-CFS
/// segments on an Exception.
/// </p>
/// </summary>
public virtual void AddIndexes(IndexReader[] readers)
{
lock (this)
{
Optimize(); // start with zero or 1 seg
System.String mergedName = NewSegmentName();
SegmentMerger merger = new SegmentMerger(this, mergedName);
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
IndexReader sReader = null;
if (segmentInfos.Count == 1)
{
// add existing index, if any
sReader = SegmentReader.Get(segmentInfos.Info(0));
merger.Add(sReader);
segmentsToDelete.Add(sReader); // queue segment for
// deletion
}
for (int i = 0; i < readers.Length; i++)
// add new indexes
merger.Add(readers[i]);
SegmentInfo info;
System.String segmentsInfosFileName = segmentInfos.GetCurrentSegmentFileName();
bool success = false;
StartTransaction();
try
{
int docCount = merger.Merge(); // merge 'em
segmentInfos.RemoveRange(0, segmentInfos.Count); // pop old infos & add new
info = new SegmentInfo(mergedName, docCount, directory, false, true);
segmentInfos.Add(info);
commitPending = true;
if (sReader != null)
sReader.Close();
success = true;
}
finally
{
if (!success)
{
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
deleter.DeleteFile(segmentsInfosFileName); // delete old segments_N
// file
deleter.DeleteSegments(segmentsToDelete); // delete now-unused
// segments
if (useCompoundFile)
{
success = false;
segmentsInfosFileName = segmentInfos.GetCurrentSegmentFileName();
System.Collections.ArrayList filesToDelete;
StartTransaction();
try
{
filesToDelete = merger.CreateCompoundFile(mergedName + ".cfs");
info.SetUseCompoundFile(true);
commitPending = true;
success = true;
}
finally
{
if (!success)
{
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
deleter.DeleteFile(segmentsInfosFileName); // delete old segments_N
// file
deleter.DeleteFiles(filesToDelete); // delete now unused files of
// segment
}
}
}
/// <summary> Merges the named range of segments, replacing them in the stack with a
/// single segment.
/// </summary>
private int MergeSegments(SegmentInfos sourceSegments, int minSegment, int end)
{
// We may be called solely because there are deletes
// pending, in which case doMerge is false:
bool doMerge = end > 0;
System.String mergedName = NewSegmentName();
SegmentMerger merger = null;
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
System.String segmentsInfosFileName = segmentInfos.GetCurrentSegmentFileName();
System.String nextSegmentsFileName = segmentInfos.GetNextSegmentFileName();
SegmentInfo newSegment = null;
int mergedDocCount = 0;
// This is try/finally to make sure merger's readers are closed:
try
{
if (doMerge)
{
if (infoStream != null)
infoStream.Write("merging segments");
merger = new SegmentMerger(this, mergedName);
for (int i = minSegment; i < end; i++)
{
SegmentInfo si = sourceSegments.Info(i);
if (infoStream != null)
infoStream.Write(" " + si.name + " (" + si.docCount + " docs)");
IndexReader reader = SegmentReader.Get(si); // no need to
// set deleter
// (yet)
merger.Add(reader);
if ((reader.Directory() == this.directory) || (reader.Directory() == this.ramDirectory))
segmentsToDelete.Add(reader); // queue segment
// for deletion
}
}
SegmentInfos rollback = null;
bool success = false;
// This is try/finally to rollback our internal state
// if we hit exception when doing the merge:
try
{
if (doMerge)
{
mergedDocCount = merger.Merge();
if (infoStream != null)
{
infoStream.WriteLine(" into " + mergedName + " (" + mergedDocCount + " docs)");
}
newSegment = new SegmentInfo(mergedName, mergedDocCount, directory, false, true);
}
if (!inTransaction && (sourceSegments != ramSegmentInfos || bufferedDeleteTerms.Count > 0))
{
// Now save the SegmentInfo instances that
// we are replacing:
rollback = (SegmentInfos) segmentInfos.Clone();
}
if (doMerge)
{
if (sourceSegments == ramSegmentInfos)
{
segmentInfos.Add(newSegment);
}
else
{
for (int i = end - 1; i > minSegment; i--)
// remove old infos & add new
sourceSegments.RemoveAt(i);
segmentInfos[minSegment] = newSegment;
}
}
if (sourceSegments == ramSegmentInfos)
{
// Should not be necessary: no prior commit should
// have left pending files, so just defensive:
deleter.ClearPendingFiles();
MaybeApplyDeletes(doMerge);
DoAfterFlush();
}
if (!inTransaction)
{
segmentInfos.Write(directory); // commit before deleting
}
else
{
commitPending = true;
}
success = true;
}
finally
{
if (success)
{
// The non-ram-segments case is already committed
// (above), so all the remains for ram segments case
// is to clear the ram segments:
if (sourceSegments == ramSegmentInfos)
{
ramSegmentInfos.Clear();
}
}
else if (!inTransaction)
{
// Must rollback so our state matches index:
if (sourceSegments == ramSegmentInfos && 0 == bufferedDeleteTerms.Count)
{
// Simple case: newSegment may or may not have
// been added to the end of our segment infos,
// so just check & remove if so:
if (newSegment != null && segmentInfos.Count > 0 && segmentInfos.Info(segmentInfos.Count - 1) == newSegment)
{
segmentInfos.RemoveAt(segmentInfos.Count - 1);
}
}
else if (rollback != null)
{
// Rollback the individual SegmentInfo
// instances, but keep original SegmentInfos
// instance (so we don't try to write again the
// same segments_N file -- write once):
segmentInfos.Clear();
segmentInfos.AddRange(rollback);
}
// Erase any pending files that we were going to delete:
// i.e. old del files added by SegmentReader.doCommit()
deleter.ClearPendingFiles();
// Delete any partially created files:
deleter.DeleteFile(nextSegmentsFileName);
deleter.FindDeletableFiles();
deleter.DeleteFiles();
}
}
}
finally
{
// close readers before we attempt to delete now-obsolete segments
if (doMerge)
merger.CloseReaders();
}
if (!inTransaction)
{
// Attempt to delete all files we just obsoleted:
deleter.DeleteFile(segmentsInfosFileName); // delete old segments_N
// file
deleter.DeleteSegments(segmentsToDelete); // delete now-unused
// segments
// Includes the old del files
deleter.CommitPendingFiles();
}
else
{
deleter.AddPendingFile(segmentsInfosFileName); // delete old
// segments_N file
deleter.DeleteSegments(segmentsToDelete, protectedSegments); // delete
// now-unused
// segments
}
if (useCompoundFile && doMerge)
{
segmentsInfosFileName = nextSegmentsFileName;
nextSegmentsFileName = segmentInfos.GetNextSegmentFileName();
System.Collections.ArrayList filesToDelete;
bool success = false;
try
{
filesToDelete = merger.CreateCompoundFile(mergedName + ".cfs");
newSegment.SetUseCompoundFile(true);
if (!inTransaction)
{
segmentInfos.Write(directory); // commit again so readers
// know we've switched this
// segment to a compound
// file
}
success = true;
}
finally
{
if (!success && !inTransaction)
{
// Must rollback:
newSegment.SetUseCompoundFile(false);
deleter.DeleteFile(mergedName + ".cfs");
deleter.DeleteFile(nextSegmentsFileName);
}
}
if (!inTransaction)
{
deleter.DeleteFile(segmentsInfosFileName); // delete old
// segments_N file
}
// We can delete these segments whether or not we are
// in a transaction because we had just written them
// above so they can't need protection by the
// transaction:
deleter.DeleteFiles(filesToDelete); // delete now-unused segments
}
return mergedDocCount;
}
private SegmentInfo Merge(SegmentInfo si1, SegmentInfo si2, System.String merged, bool useCompoundFile)
{
SegmentReader r1 = SegmentReader.Get(si1);
SegmentReader r2 = SegmentReader.Get(si2);
SegmentMerger merger = new SegmentMerger(si1.dir, merged);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
if (useCompoundFile)
{
System.Collections.Generic.ICollection<string> filesToDelete = merger.CreateCompoundFile(merged + ".cfs");
for (System.Collections.IEnumerator iter = filesToDelete.GetEnumerator(); iter.MoveNext(); )
{
si1.dir.DeleteFile((System.String) iter.Current);
}
}
return new SegmentInfo(merged, si1.docCount + si2.docCount, si1.dir, useCompoundFile, true);
}
/// <summary>Does the actual (time-consuming) work of the merge,
/// but without holding synchronized lock on IndexWriter
/// instance
/// </summary>
private int MergeMiddle(MergePolicy.OneMerge merge)
{
merge.CheckAborted(directory);
System.String mergedName = merge.info.name;
SegmentMerger merger = null;
int mergedDocCount = 0;
SegmentInfos sourceSegments = merge.segments;
int numSegments = sourceSegments.Count;
if (infoStream != null)
Message("merging " + merge.SegString(directory));
merger = new SegmentMerger(this, mergedName, merge);
merge.readers = new SegmentReader[numSegments];
merge.readersClone = new SegmentReader[numSegments];
bool mergeDocStores = false;
System.Collections.Hashtable dss = new System.Collections.Hashtable();
String currentDocStoreSegment;
lock(this) {
currentDocStoreSegment = docWriter.GetDocStoreSegment();
}
bool currentDSSMerged = false;
// This is try/finally to make sure merger's readers are
// closed:
bool success = false;
try
{
int totDocCount = 0;
for (int i = 0; i < numSegments; i++)
{
SegmentInfo info = sourceSegments.Info(i);
// Hold onto the "live" reader; we will use this to
// commit merged deletes
SegmentReader reader = merge.readers[i] = readerPool.Get(info, merge.mergeDocStores, MERGE_READ_BUFFER_SIZE, -1);
// We clone the segment readers because other
// deletes may come in while we're merging so we
// need readers that will not change
SegmentReader clone = merge.readersClone[i] = (SegmentReader)reader.Clone(true);
merger.Add(clone);
if (clone.HasDeletions())
{
mergeDocStores = true;
}
if (info.GetDocStoreOffset() != -1 && currentDocStoreSegment != null)
{
currentDSSMerged |= currentDocStoreSegment.Equals(info.GetDocStoreSegment());
}
totDocCount += clone.NumDocs();
}
if (infoStream != null)
{
Message("merge: total " + totDocCount + " docs");
}
merge.CheckAborted(directory);
// If deletions have arrived and it has now become
// necessary to merge doc stores, go and open them:
if (mergeDocStores && !merge.mergeDocStores)
{
merge.mergeDocStores = true;
lock (this)
{
if (currentDSSMerged)
{
if (infoStream != null)
{
Message("now flush at mergeMiddle");
}
DoFlush(true, false);
}
}
for (int i = 0; i < numSegments; i++)
{
merge.readersClone[i].OpenDocStores();
}
// Clear DSS
merge.info.SetDocStore(-1, null, false);
}
// This is where all the work happens:
mergedDocCount = merge.info.docCount = merger.Merge(merge.mergeDocStores);
System.Diagnostics.Debug.Assert(mergedDocCount == totDocCount);
if (merge.useCompoundFile)
{
success = false;
string compoundFileName = IndexFileNames.SegmentFileName(mergedName, IndexFileNames.COMPOUND_FILE_EXTENSION);
try
{
if (infoStream != null)
{
Message("create compound file " + compoundFileName);
}
merger.CreateCompoundFile(compoundFileName);
success = true;
}
catch (System.IO.IOException ioe)
{
lock (this)
{
if (merge.IsAborted())
{
// This can happen if rollback or close(false)
// is called -- fall through to logic below to
// remove the partially created CFS:
}
else
{
HandleMergeException(ioe, merge);
}
}
}
catch (Exception t)
{
HandleMergeException(t, merge);
}
finally
{
if (!success)
{
if (infoStream != null)
{
Message("hit exception creating compound file during merge");
}
lock (this)
{
deleter.DeleteFile(compoundFileName);
deleter.DeleteNewFiles(merger.GetMergedFiles());
}
}
}
success = false;
lock (this)
{
// delete new non cfs files directly: they were never
// registered with IFD
deleter.DeleteNewFiles(merger.GetMergedFiles());
if (merge.IsAborted())
{
if (infoStream != null)
{
Message("abort merge after building CFS");
}
deleter.DeleteFile(compoundFileName);
return 0;
}
}
merge.info.SetUseCompoundFile(true);
}
int termsIndexDivisor;
bool loadDocStores;
// if the merged segment warmer was not installed when
// this merge was started, causing us to not force
// the docStores to close, we can't warm it now
bool canWarm = merge.info.GetDocStoreSegment() == null || currentDocStoreSegment == null || !merge.info.GetDocStoreSegment().Equals(currentDocStoreSegment);
if (poolReaders && mergedSegmentWarmer != null && canWarm)
{
// Load terms index & doc stores so the segment
// warmer can run searches, load documents/term
// vectors
termsIndexDivisor = readerTermsIndexDivisor;
loadDocStores = true;
}
else
{
termsIndexDivisor = -1;
loadDocStores = false;
}
// TODO: in the non-realtime case, we may want to only
// keep deletes (it's costly to open entire reader
// when we just need deletes)
SegmentReader mergedReader = readerPool.Get(merge.info, loadDocStores, BufferedIndexInput.BUFFER_SIZE, termsIndexDivisor);
try
{
if (poolReaders && mergedSegmentWarmer != null)
{
mergedSegmentWarmer.Warm(mergedReader);
}
if (!CommitMerge(merge, merger, mergedDocCount, mergedReader))
{
// commitMerge will return false if this merge was aborted
return 0;
}
}
finally
{
lock (this)
{
readerPool.Release(mergedReader);
}
}
success = true;
}
finally
{
// Readers are already closed in commitMerge if we didn't hit
// an exc:
if (!success)
{
CloseMergeReaders(merge, true);
}
}
merge.mergeDone = true;
lock (mergeScheduler)
{
System.Threading.Monitor.PulseAll(mergeScheduler);
}
// Force a sync after commiting the merge. Once this
// sync completes then all index files referenced by the
// current segmentInfos are on stable storage so if the
// OS/machine crashes, or power cord is yanked, the
// index will be intact. Note that this is just one
// (somewhat arbitrary) policy; we could try other
// policies like only sync if it's been > X minutes or
// more than Y bytes have been written, etc.
if (autoCommit)
{
long size;
lock (this)
{
size = merge.info.SizeInBytes();
}
Commit(size);
}
return mergedDocCount;
}
/// <summary>Merges the provided indexes into this index.
/// <p/>After this completes, the index is optimized. <p/>
/// <p/>The provided IndexReaders are not closed.<p/>
///
/// <p/><b>NOTE:</b> while this is running, any attempts to
/// add or delete documents (with another thread) will be
/// paused until this method completes.
///
/// <p/>See {@link #AddIndexesNoOptimize(Directory[])} for
/// details on transactional semantics, temporary free
/// space required in the Directory, and non-CFS segments
/// on an Exception.<p/>
///
/// <p/><b>NOTE</b>: if this method hits an OutOfMemoryError
/// you should immediately close the writer. See <a
/// href="#OOME">above</a> for details.<p/>
///
/// </summary>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void AddIndexes(IndexReader[] readers)
{
EnsureOpen();
// Do not allow add docs or deletes while we are running:
docWriter.PauseAllThreads();
// We must pre-acquire a read lock here (and upgrade to
// write lock in startTransaction below) so that no
// other addIndexes is allowed to start up after we have
// flushed & optimized but before we then start our
// transaction. This is because the merging below
// requires that only one segment is present in the
// index:
AcquireRead();
try
{
SegmentInfo info = null;
System.String mergedName = null;
SegmentMerger merger = null;
bool success = false;
try
{
Flush(true, false, true);
Optimize(); // start with zero or 1 seg
success = true;
}
finally
{
// Take care to release the read lock if we hit an
// exception before starting the transaction
if (!success)
ReleaseRead();
}
// true means we already have a read lock; if this
// call hits an exception it will release the write
// lock:
StartTransaction(true);
try
{
mergedName = NewSegmentName();
merger = new SegmentMerger(this, mergedName, null);
SegmentReader sReader = null;
lock (this)
{
if (segmentInfos.Count == 1)
{
// add existing index, if any
sReader = readerPool.Get(segmentInfos.Info(0), true, BufferedIndexInput.BUFFER_SIZE, - 1);
}
}
success = false;
try
{
if (sReader != null)
merger.Add(sReader);
for (int i = 0; i < readers.Length; i++)
// add new indexes
merger.Add(readers[i]);
int docCount = merger.Merge(); // merge 'em
lock (this)
{
segmentInfos.Clear(); // pop old infos & add new
info = new SegmentInfo(mergedName, docCount, directory, false, true, - 1, null, false, merger.HasProx());
SetDiagnostics(info, "addIndexes(IndexReader[])");
segmentInfos.Add(info);
}
// Notify DocumentsWriter that the flushed count just increased
docWriter.UpdateFlushedDocCount(docCount);
success = true;
}
finally
{
if (sReader != null)
{
readerPool.Release(sReader);
}
}
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception in addIndexes during merge");
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
if (mergePolicy is LogMergePolicy && GetUseCompoundFile())
{
System.Collections.Generic.IList<string> files = null;
lock (this)
{
// Must incRef our files so that if another thread
// is running merge/optimize, it doesn't delete our
// segment's files before we have a change to
// finish making the compound file.
if (segmentInfos.Contains(info))
{
files = info.Files();
deleter.IncRef(files);
}
}
if (files != null)
{
success = false;
StartTransaction(false);
try
{
merger.CreateCompoundFile(mergedName + ".cfs");
lock (this)
{
info.SetUseCompoundFile(true);
}
success = true;
}
finally
{
lock (this)
{
deleter.DecRef(files);
}
if (!success)
{
if (infoStream != null)
Message("hit exception building compound file in addIndexes during merge");
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
}
}
}
catch (System.OutOfMemoryException oom)
{
HandleOOM(oom, "addIndexes(IndexReader[])");
}
finally
{
if (docWriter != null)
{
docWriter.ResumeAllThreads();
}
}
}
public virtual void TestMerge()
{
SegmentMerger merger = new SegmentMerger(mergedDir, mergedSegment);
merger.Add(reader1);
merger.Add(reader2);
int docsMerged = merger.Merge();
merger.CloseReaders();
Assert.IsTrue(docsMerged == 2);
//Should be able to open a new SegmentReader against the new directory
SegmentReader mergedReader = SegmentReader.Get(new SegmentInfo(mergedSegment, docsMerged, mergedDir, false, true));
Assert.IsTrue(mergedReader != null);
Assert.IsTrue(mergedReader.NumDocs() == 2);
Lucene.Net.Documents.Document newDoc1 = mergedReader.Document(0);
Assert.IsTrue(newDoc1 != null);
//There are 2 unstored fields on the document
Assert.IsTrue(DocHelper.NumFields(newDoc1) == DocHelper.NumFields(doc1) - DocHelper.unstored.Count);
Lucene.Net.Documents.Document newDoc2 = mergedReader.Document(1);
Assert.IsTrue(newDoc2 != null);
Assert.IsTrue(DocHelper.NumFields(newDoc2) == DocHelper.NumFields(doc2) - DocHelper.unstored.Count);
TermDocs termDocs = mergedReader.TermDocs(new Term(DocHelper.TEXT_FIELD_2_KEY, "field"));
Assert.IsTrue(termDocs != null);
Assert.IsTrue(termDocs.Next() == true);
System.Collections.ICollection stored = mergedReader.GetFieldNames(IndexReader.FieldOption.INDEXED_WITH_TERMVECTOR);
Assert.IsTrue(stored != null);
//System.out.println("stored size: " + stored.size());
Assert.IsTrue(stored.Count == 4, "We do not have 4 fields that were indexed with term vector");
TermFreqVector vector = mergedReader.GetTermFreqVector(0, DocHelper.TEXT_FIELD_2_KEY);
Assert.IsTrue(vector != null);
System.String[] terms = vector.GetTerms();
Assert.IsTrue(terms != null);
//System.out.println("Terms size: " + terms.length);
Assert.IsTrue(terms.Length == 3);
int[] freqs = vector.GetTermFrequencies();
Assert.IsTrue(freqs != null);
//System.out.println("Freqs size: " + freqs.length);
Assert.IsTrue(vector is TermPositionVector == true);
for (int i = 0; i < terms.Length; i++)
{
System.String term = terms[i];
int freq = freqs[i];
//System.out.println("Term: " + term + " Freq: " + freq);
Assert.IsTrue(DocHelper.FIELD_2_TEXT.IndexOf(term) != - 1);
Assert.IsTrue(DocHelper.FIELD_2_FREQS[i] == freq);
}
TestSegmentReader.CheckNorms(mergedReader);
}
/// <summary>Does the actual (time-consuming) work of the merge,
/// but without holding synchronized lock on IndexWriter
/// instance
/// </summary>
private int MergeMiddle(MergePolicy.OneMerge merge)
{
merge.CheckAborted(directory);
System.String mergedName = merge.info.name;
SegmentMerger merger = null;
int mergedDocCount = 0;
SegmentInfos sourceSegments = merge.segments;
SegmentInfos sourceSegmentsClone = merge.segmentsClone;
int numSegments = sourceSegments.Count;
if (infoStream != null)
Message("merging " + merge.SegString(directory));
merger = new SegmentMerger(this, mergedName, merge);
// This is try/finally to make sure merger's readers are
// closed:
bool success = false;
try
{
int totDocCount = 0;
for (int i = 0; i < numSegments; i++)
{
SegmentInfo si = sourceSegmentsClone.Info(i);
IndexReader reader = SegmentReader.Get(si, MERGE_READ_BUFFER_SIZE, merge.mergeDocStores); // no need to set deleter (yet)
merger.Add(reader);
totDocCount += reader.NumDocs();
}
if (infoStream != null)
{
Message("merge: total " + totDocCount + " docs");
}
merge.CheckAborted(directory);
mergedDocCount = merge.info.docCount = merger.Merge(merge.mergeDocStores);
System.Diagnostics.Debug.Assert(mergedDocCount == totDocCount);
success = true;
}
finally
{
// close readers before we attempt to delete
// now-obsolete segments
if (merger != null)
{
merger.CloseReaders();
}
if (!success)
{
if (infoStream != null)
Message("hit exception during merge; now refresh deleter on segment " + mergedName);
lock (this)
{
AddMergeException(merge);
deleter.Refresh(mergedName);
}
}
}
if (!CommitMerge(merge))
// commitMerge will return false if this merge was aborted
return 0;
if (merge.useCompoundFile)
{
success = false;
bool skip = false;
System.String compoundFileName = mergedName + "." + IndexFileNames.COMPOUND_FILE_EXTENSION;
try
{
try
{
merger.CreateCompoundFile(compoundFileName);
success = true;
}
catch (System.IO.IOException ioe)
{
lock (this)
{
if (segmentInfos.IndexOf(merge.info) == - 1)
{
// If another merge kicked in and merged our
// new segment away while we were trying to
// build the compound file, we can hit a
// FileNotFoundException and possibly
// IOException over NFS. We can tell this has
// happened because our SegmentInfo is no
// longer in the segments; if this has
// happened it is safe to ignore the exception
// & skip finishing/committing our compound
// file creating.
if (infoStream != null)
Message("hit exception creating compound file; ignoring it because our info (segment " + merge.info.name + ") has been merged away");
skip = true;
}
else
throw ioe;
}
}
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception creating compound file during merge: skip=" + skip);
lock (this)
{
if (!skip)
AddMergeException(merge);
deleter.DeleteFile(compoundFileName);
}
}
}
if (!skip)
{
lock (this)
{
if (skip || segmentInfos.IndexOf(merge.info) == - 1 || merge.IsAborted())
{
// Our segment (committed in non-compound
// format) got merged away while we were
// building the compound format.
deleter.DeleteFile(compoundFileName);
}
else
{
success = false;
try
{
merge.info.SetUseCompoundFile(true);
Checkpoint();
success = true;
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception checkpointing compound file during merge");
// Must rollback:
AddMergeException(merge);
merge.info.SetUseCompoundFile(false);
DeletePartialSegmentsFile();
deleter.DeleteFile(compoundFileName);
}
}
// Give deleter a chance to remove files now.
deleter.Checkpoint(segmentInfos, autoCommit);
}
}
}
}
return mergedDocCount;
}
/// <summary>Merges the provided indexes into this index.
/// <p>After this completes, the index is optimized. </p>
/// <p>The provided IndexReaders are not closed.</p>
///
/// <p><b>NOTE:</b> the index in each Directory must not be
/// changed (opened by a writer) while this method is
/// running. Thiw method does not acquire a write lock in
/// each input Directory, so it is up to the caller to
/// enforce this.
/// </p>
///
/// <p><b>NOTE:</b> while this is running, any attempts to
/// add or delete documents (with another thread) will be
/// paused until this method completes.</p>
///
/// <p>See {@link #AddIndexes(Directory[])} for
/// details on transactional semantics, temporary free
/// space required in the Directory, and non-CFS segments
/// on an Exception.</p>
/// </summary>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void AddIndexes(IndexReader[] readers)
{
EnsureOpen();
// Do not allow add docs or deletes while we are running:
docWriter.PauseAllThreads();
try
{
Optimize(); // start with zero or 1 seg
System.String mergedName = NewSegmentName();
SegmentMerger merger = new SegmentMerger(this, mergedName, null);
SegmentInfo info;
IndexReader sReader = null;
try
{
lock (this)
{
if (segmentInfos.Count == 1)
{
// add existing index, if any
sReader = SegmentReader.Get(segmentInfos.Info(0));
merger.Add(sReader);
}
}
for (int i = 0; i < readers.Length; i++)
// add new indexes
merger.Add(readers[i]);
bool success = false;
StartTransaction();
try
{
int docCount = merger.Merge(); // merge 'em
if (sReader != null)
{
sReader.Close();
sReader = null;
}
lock (this)
{
segmentInfos.RemoveRange(0, segmentInfos.Count); // pop old infos & add new
info = new SegmentInfo(mergedName, docCount, directory, false, true, -1, null, false);
segmentInfos.Add(info);
}
success = true;
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception in addIndexes during merge");
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
}
finally
{
if (sReader != null)
{
sReader.Close();
}
}
if (mergePolicy is LogMergePolicy && GetUseCompoundFile())
{
bool success = false;
StartTransaction();
try
{
merger.CreateCompoundFile(mergedName + ".cfs");
lock (this)
{
info.SetUseCompoundFile(true);
}
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception building compound file in addIndexes during merge");
RollbackTransaction();
}
else
{
CommitTransaction();
}
}
}
}
catch (OutOfMemoryException oom)
{
hitOOM = true;
throw oom;
}
finally
{
docWriter.ResumeAllThreads();
}
}
private void Merge(System.String seg1, System.String seg2, System.String merged, bool useCompoundFile)
{
Directory directory = FSDirectory.GetDirectory(indexDir, false);
SegmentReader r1 = new SegmentReader(new SegmentInfo(seg1, 1, directory));
SegmentReader r2 = new SegmentReader(new SegmentInfo(seg2, 1, directory));
SegmentMerger merger = new SegmentMerger(directory, merged, useCompoundFile);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
directory.Close();
}
private SegmentInfo Merge(SegmentInfo si1, SegmentInfo si2, System.String merged, bool useCompoundFile)
{
Directory directory = FSDirectory.GetDirectory(indexDir, false);
SegmentReader r1 = SegmentReader.Get(si1);
SegmentReader r2 = SegmentReader.Get(si2);
SegmentMerger merger = new SegmentMerger(directory, merged);
merger.Add(r1);
merger.Add(r2);
merger.Merge();
merger.CloseReaders();
if (useCompoundFile)
{
System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(merged + ".cfs");
for (System.Collections.IEnumerator iter = filesToDelete.GetEnumerator(); iter.MoveNext(); )
{
directory.DeleteFile((System.String) iter.Current);
}
}
directory.Close();
return new SegmentInfo(merged, si1.docCount + si2.docCount, directory, useCompoundFile, true);
}
/// <summary>Merges the named range of segments, replacing them in the stack with a
/// single segment.
/// </summary>
private void MergeSegments(int minSegment, int end)
{
System.String mergedName = NewSegmentName();
if (infoStream != null)
infoStream.Write("merging segments");
SegmentMerger merger = new SegmentMerger(this, mergedName);
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
for (int i = minSegment; i < end; i++)
{
SegmentInfo si = segmentInfos.Info(i);
if (infoStream != null)
infoStream.Write(" " + si.name + " (" + si.docCount + " docs)");
IndexReader reader = SegmentReader.Get(si);
merger.Add(reader);
if ((reader.Directory() == this.directory) || (reader.Directory() == this.ramDirectory))
segmentsToDelete.Add(reader); // queue segment for deletion
}
int mergedDocCount = merger.Merge();
if (infoStream != null)
{
infoStream.WriteLine(" into " + mergedName + " (" + mergedDocCount + " docs)");
}
for (int i = end - 1; i >= minSegment; i--)
// remove old infos & add new
segmentInfos.RemoveAt(i);
segmentInfos.Add(new SegmentInfo(mergedName, mergedDocCount, directory));
// close readers before we attempt to delete now-obsolete segments
merger.CloseReaders();
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith3(segmentsToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
if (useCompoundFile)
{
System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(mergedName + ".tmp");
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith4(mergedName, filesToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
}
}
/// <summary>Merges the provided indexes into this index.
/// <p>After this completes, the index is optimized. </p>
/// <p>The provided IndexReaders are not closed.</p>
/// </summary>
public virtual void AddIndexes(IndexReader[] readers)
{
lock (this)
{
Optimize(); // start with zero or 1 seg
System.String mergedName = NewSegmentName();
SegmentMerger merger = new SegmentMerger(this, mergedName);
System.Collections.ArrayList segmentsToDelete = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
IndexReader sReader = null;
if (segmentInfos.Count == 1)
{
// add existing index, if any
sReader = SegmentReader.Get(segmentInfos.Info(0));
merger.Add(sReader);
segmentsToDelete.Add(sReader); // queue segment for deletion
}
for (int i = 0; i < readers.Length; i++)
// add new indexes
merger.Add(readers[i]);
int docCount = merger.Merge(); // merge 'em
segmentInfos.RemoveRange(0, segmentInfos.Count - 0); // pop old infos & add new
segmentInfos.Add(new SegmentInfo(mergedName, docCount, directory));
if (sReader != null)
sReader.Close();
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith1(segmentsToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
if (useCompoundFile)
{
System.Collections.ArrayList filesToDelete = merger.CreateCompoundFile(mergedName + ".tmp");
lock (directory)
{
// in- & inter-process sync
new AnonymousClassWith2(mergedName, filesToDelete, this, directory.MakeLock(COMMIT_LOCK_NAME), COMMIT_LOCK_TIMEOUT).Run();
}
}
}
}
/// <summary>Does the actual (time-consuming) work of the merge,
/// but without holding synchronized lock on IndexWriter
/// instance
/// </summary>
private int MergeMiddle(MergePolicy.OneMerge merge)
{
merge.CheckAborted(directory);
System.String mergedName = merge.info.name;
SegmentMerger merger = null;
int mergedDocCount = 0;
SegmentInfos sourceSegments = merge.segments;
int numSegments = sourceSegments.Count;
if (infoStream != null)
Message("merging " + merge.SegString(directory));
merger = new SegmentMerger(this, mergedName, merge);
merge.readers = new SegmentReader[numSegments];
merge.readersClone = new SegmentReader[numSegments];
bool mergeDocStores = false;
System.Collections.Hashtable dss = new System.Collections.Hashtable();
// This is try/finally to make sure merger's readers are
// closed:
bool success = false;
try
{
int totDocCount = 0;
for (int i = 0; i < numSegments; i++)
{
SegmentInfo info = sourceSegments.Info(i);
// Hold onto the "live" reader; we will use this to
// commit merged deletes
SegmentReader reader = merge.readers[i] = readerPool.Get(info, merge.mergeDocStores, MERGE_READ_BUFFER_SIZE, - 1);
// We clone the segment readers because other
// deletes may come in while we're merging so we
// need readers that will not change
SegmentReader clone = merge.readersClone[i] = (SegmentReader) reader.Clone(true);
merger.Add(clone);
if (clone.HasDeletions())
{
mergeDocStores = true;
}
if (info.GetDocStoreOffset() != - 1)
{
dss[info.GetDocStoreSegment()] = info.GetDocStoreSegment();
}
totDocCount += clone.NumDocs();
}
if (infoStream != null)
{
Message("merge: total " + totDocCount + " docs");
}
merge.CheckAborted(directory);
// If deletions have arrived and it has now become
// necessary to merge doc stores, go and open them:
if (mergeDocStores && !merge.mergeDocStores)
{
merge.mergeDocStores = true;
lock (this)
{
String key = docWriter.GetDocStoreSegment();
if (key!=null && dss.Contains(key))
{
if (infoStream != null)
Message("now flush at mergeMiddle");
DoFlush(true, false);
}
}
for (int i = 0; i < numSegments; i++)
{
merge.readersClone[i].OpenDocStores();
}
// Clear DSS
lock (this)
{
merge.info.SetDocStore(- 1, null, false);
}
}
// This is where all the work happens:
mergedDocCount = merge.info.docCount = merger.Merge(merge.mergeDocStores);
System.Diagnostics.Debug.Assert(mergedDocCount == totDocCount);
// TODO: in the non-realtime case, we may want to only
// keep deletes (it's costly to open entire reader
// when we just need deletes)
SegmentReader mergedReader = readerPool.Get(merge.info, false, BufferedIndexInput.BUFFER_SIZE, - 1);
try
{
if (poolReaders && mergedSegmentWarmer != null)
{
mergedSegmentWarmer.Warm(mergedReader);
}
if (!CommitMerge(merge, merger, mergedDocCount, mergedReader))
// commitMerge will return false if this merge was aborted
return 0;
}
finally
{
lock (this)
{
readerPool.Release(mergedReader);
}
}
success = true;
}
finally
{
lock (this)
{
if (!success)
{
// Suppress any new exceptions so we throw the
// original cause
for (int i = 0; i < numSegments; i++)
{
if (merge.readers[i] != null)
{
try
{
readerPool.Release(merge.readers[i], true);
}
catch (System.Exception t)
{
}
}
if (merge.readersClone[i] != null)
{
try
{
merge.readersClone[i].Close();
}
catch (System.Exception t)
{
}
// This was a private clone and we had the only reference
System.Diagnostics.Debug.Assert(merge.readersClone[i].GetRefCount() == 0);
}
}
}
else
{
for (int i = 0; i < numSegments; i++)
{
if (merge.readers[i] != null)
{
readerPool.Release(merge.readers[i], true);
}
if (merge.readersClone[i] != null)
{
merge.readersClone[i].Close();
// This was a private clone and we had the only reference
System.Diagnostics.Debug.Assert(merge.readersClone[i].GetRefCount() == 0);
}
}
}
}
}
// Must checkpoint before decrefing so any newly
// referenced files in the new merge.info are incref'd
// first:
lock (this)
{
deleter.Checkpoint(segmentInfos, false);
}
DecrefMergeSegments(merge);
if (merge.useCompoundFile)
{
// Maybe force a sync here to allow reclaiming of the
// disk space used by the segments we just merged:
if (autoCommit && DoCommitBeforeMergeCFS(merge))
{
long size;
lock (this)
{
size = merge.info.SizeInBytes();
}
Commit(size);
}
success = false;
System.String compoundFileName = mergedName + "." + IndexFileNames.COMPOUND_FILE_EXTENSION;
try
{
merger.CreateCompoundFile(compoundFileName);
success = true;
}
catch (System.IO.IOException ioe)
{
lock (this)
{
if (merge.IsAborted())
{
// This can happen if rollback or close(false)
// is called -- fall through to logic below to
// remove the partially created CFS:
success = true;
}
else
HandleMergeException(ioe, merge);
}
}
catch (System.Exception t)
{
HandleMergeException(t, merge);
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception creating compound file during merge");
lock (this)
{
deleter.DeleteFile(compoundFileName);
}
}
}
if (merge.IsAborted())
{
if (infoStream != null)
Message("abort merge after building CFS");
deleter.DeleteFile(compoundFileName);
return 0;
}
lock (this)
{
if (segmentInfos.IndexOf(merge.info) == - 1 || merge.IsAborted())
{
// Our segment (committed in non-compound
// format) got merged away while we were
// building the compound format.
deleter.DeleteFile(compoundFileName);
}
else
{
merge.info.SetUseCompoundFile(true);
Checkpoint();
}
}
}
// Force a sync after commiting the merge. Once this
// sync completes then all index files referenced by the
// current segmentInfos are on stable storage so if the
// OS/machine crashes, or power cord is yanked, the
// index will be intact. Note that this is just one
// (somewhat arbitrary) policy; we could try other
// policies like only sync if it's been > X minutes or
// more than Y bytes have been written, etc.
if (autoCommit)
{
long size;
lock (this)
{
size = merge.info.SizeInBytes();
}
Commit(size);
}
return mergedDocCount;
}
