internal void DecRef(SegmentInfos segmentInfos)
{
System.Collections.Generic.IEnumerator <string> it = segmentInfos.Files(directory, false).GetEnumerator();
while (it.MoveNext())
{
DecRef(it.Current);
}
}
internal void IncRef(SegmentInfos segmentInfos, bool isCommit)
{
// If this is a commit point, also incRef the
// segments_N file:
System.Collections.Generic.IEnumerator <string> it = segmentInfos.Files(directory, isCommit).GetEnumerator();
while (it.MoveNext())
{
IncRef(it.Current);
}
}
public CommitPoint(IndexFileDeleter enclosingInstance, System.Collections.ICollection commitsToDelete, Directory directory, SegmentInfos segmentInfos)
{
InitBlock(enclosingInstance);
this.directory = directory;
this.commitsToDelete = commitsToDelete;
userData = segmentInfos.GetUserData();
segmentsFileName = segmentInfos.GetCurrentSegmentFileName();
version = segmentInfos.GetVersion();
generation = segmentInfos.GetGeneration();
files = segmentInfos.Files(directory, true);
gen = segmentInfos.GetGeneration();
isOptimized = segmentInfos.Count == 1 && !segmentInfos.Info(0).HasDeletions();
System.Diagnostics.Debug.Assert(!segmentInfos.HasExternalSegments(directory));
}
public CommitPoint(IndexFileDeleter enclosingInstance, System.Collections.ICollection commitsToDelete, Directory directory, SegmentInfos segmentInfos)
{
InitBlock(enclosingInstance);
this.directory = directory;
this.commitsToDelete = commitsToDelete;
userData = segmentInfos.GetUserData();
segmentsFileName = segmentInfos.GetCurrentSegmentFileName();
version = segmentInfos.GetVersion();
generation = segmentInfos.GetGeneration();
files = segmentInfos.Files(directory, true);
gen = segmentInfos.GetGeneration();
isOptimized = segmentInfos.Count == 1 && !segmentInfos.Info(0).HasDeletions();
System.Diagnostics.Debug.Assert(!segmentInfos.HasExternalSegments(directory));
}
internal void DecRef(SegmentInfos segmentInfos)
{
System.Collections.Generic.IEnumerator<string> it = segmentInfos.Files(directory, false).GetEnumerator();
while (it.MoveNext())
{
DecRef(it.Current);
}
}
internal void IncRef(SegmentInfos segmentInfos, bool isCommit)
{
// If this is a commit point, also incRef the
// segments_N file:
System.Collections.Generic.IEnumerator<string> it = segmentInfos.Files(directory, isCommit).GetEnumerator();
while (it.MoveNext())
{
IncRef(it.Current);
}
}
/// <summary> For definition of "check point" see IndexWriter comments:
/// "Clarification: Check Points (and commits)".
///
/// Writer calls this when it has made a "consistent
/// change" to the index, meaning new files are written to
/// the index and the in-memory SegmentInfos have been
/// modified to point to those files.
///
/// This may or may not be a commit (segments_N may or may
/// not have been written).
///
/// We simply incref the files referenced by the new
/// SegmentInfos and decref the files we had previously
/// seen (if any).
///
/// If this is a commit, we also call the policy to give it
/// a chance to remove other commits. If any commits are
/// removed, we decref their files as well.
/// </summary>
public void Checkpoint(SegmentInfos segmentInfos, bool isCommit)
{
if (infoStream != null)
{
Message("now checkpoint \"" + segmentInfos.GetCurrentSegmentFileName() + "\" [" + segmentInfos.Count + " segments " + "; isCommit = " + isCommit + "]");
}
// Try again now to delete any previously un-deletable
// files (because they were in use, on Windows):
DeletePendingFiles();
// Incref the files:
IncRef(segmentInfos, isCommit);
if (isCommit)
{
// Append to our commits list:
commits.Add(new CommitPoint(this, commitsToDelete, directory, segmentInfos));
// Tell policy so it can remove commits:
policy.OnCommit(commits);
// Decref files for commits that were deleted by the policy:
DeleteCommits();
}
else
{
System.Collections.Generic.IList<string> docWriterFiles;
if (docWriter != null)
{
docWriterFiles = docWriter.OpenFiles();
if (docWriterFiles != null)
// We must incRef these files before decRef'ing
// last files to make sure we don't accidentally
// delete them:
IncRef(docWriterFiles);
}
else
docWriterFiles = null;
// DecRef old files from the last checkpoint, if any:
int size = lastFiles.Count;
if (size > 0)
{
for (int i = 0; i < size; i++)
DecRef(lastFiles[i]);
lastFiles.Clear();
}
// Save files so we can decr on next checkpoint/commit:
foreach (string fname in segmentInfos.Files(directory, false))
{
lastFiles.Add(fname);
}
if (docWriterFiles != null)
{
foreach (string fname in docWriterFiles)
{
lastFiles.Add(fname);
}
}
}
}
/// <summary>This constructor is only used for {@link #Reopen()} </summary>
internal DirectoryReader(Directory directory, SegmentInfos infos, SegmentReader[] oldReaders, int[] oldStarts, System.Collections.IDictionary oldNormsCache, bool readOnly, bool doClone, int termInfosIndexDivisor)
{
this.directory = directory;
this.readOnly = readOnly;
this.segmentInfos = infos;
this.termInfosIndexDivisor = termInfosIndexDivisor;
if (!readOnly)
{
// We assume that this segments_N was previously
// properly sync'd:
SupportClass.CollectionsHelper.AddAllIfNotContains(synced, infos.Files(directory, true));
}
// we put the old SegmentReaders in a map, that allows us
// to lookup a reader using its segment name
System.Collections.IDictionary segmentReaders = new System.Collections.Hashtable();
if (oldReaders != null)
{
// create a Map SegmentName->SegmentReader
for (int i = 0; i < oldReaders.Length; i++)
{
segmentReaders[oldReaders[i].GetSegmentName()] = (System.Int32) i;
}
}
SegmentReader[] newReaders = new SegmentReader[infos.Count];
// remember which readers are shared between the old and the re-opened
// DirectoryReader - we have to incRef those readers
bool[] readerShared = new bool[infos.Count];
for (int i = infos.Count - 1; i >= 0; i--)
{
// find SegmentReader for this segment
int? oldReaderIndex = (int?)segmentReaders[infos.Info(i).name];
if (oldReaderIndex.HasValue == false)
{
// this is a new segment, no old SegmentReader can be reused
newReaders[i] = null;
}
else
{
// there is an old reader for this segment - we'll try to reopen it
newReaders[i] = oldReaders[oldReaderIndex.Value];
}
bool success = false;
try
{
SegmentReader newReader;
if (newReaders[i] == null || infos.Info(i).GetUseCompoundFile() != newReaders[i].GetSegmentInfo().GetUseCompoundFile())
{
// We should never see a totally new segment during cloning
System.Diagnostics.Debug.Assert(!doClone);
// this is a new reader; in case we hit an exception we can close it safely
newReader = SegmentReader.Get(readOnly, infos.Info(i), termInfosIndexDivisor);
}
else
{
newReader = newReaders[i].ReopenSegment(infos.Info(i), doClone, readOnly);
}
if (newReader == newReaders[i])
{
// this reader will be shared between the old and the new one,
// so we must incRef it
readerShared[i] = true;
newReader.IncRef();
}
else
{
readerShared[i] = false;
newReaders[i] = newReader;
}
success = true;
}
finally
{
if (!success)
{
for (i++; i < infos.Count; i++)
{
if (newReaders[i] != null)
{
try
{
if (!readerShared[i])
{
// this is a new subReader that is not used by the old one,
// we can close it
newReaders[i].Close();
}
else
{
// this subReader is also used by the old reader, so instead
// closing we must decRef it
newReaders[i].DecRef();
}
}
catch (System.IO.IOException ignore)
{
// keep going - we want to clean up as much as possible
}
}
}
}
}
}
// initialize the readers to calculate maxDoc before we try to reuse the old normsCache
Initialize(newReaders);
// try to copy unchanged norms from the old normsCache to the new one
if (oldNormsCache != null)
{
System.Collections.IEnumerator it = new System.Collections.Hashtable(oldNormsCache).GetEnumerator();
while (it.MoveNext())
{
System.Collections.DictionaryEntry entry = (System.Collections.DictionaryEntry) it.Current;
System.String field = (System.String) entry.Key;
if (!HasNorms(field))
{
continue;
}
byte[] oldBytes = (byte[]) entry.Value;
byte[] bytes = new byte[MaxDoc()];
for (int i = 0; i < subReaders.Length; i++)
{
int? oldReaderIndex = (int?)segmentReaders[subReaders[i].GetSegmentName()];
// this SegmentReader was not re-opened, we can copy all of its norms
if (oldReaderIndex.HasValue &&
(oldReaders[oldReaderIndex.Value] == subReaders[i]
|| oldReaders[oldReaderIndex.Value].norms[field] == subReaders[i].norms[field]))
{
// we don't have to synchronize here: either this constructor is called from a SegmentReader,
// in which case no old norms cache is present, or it is called from MultiReader.reopen(),
// which is synchronized
Array.Copy(oldBytes, oldStarts[oldReaderIndex.Value], bytes, starts[i], starts[i + 1] - starts[i]);
}
else
{
subReaders[i].Norms(field, bytes, starts[i]);
}
}
normsCache[field] = bytes; // update cache
}
}
}
// Used by near real-time search
internal DirectoryReader(IndexWriter writer, SegmentInfos infos, int termInfosIndexDivisor)
{
this.directory = writer.GetDirectory();
this.readOnly = true;
segmentInfos = infos;
segmentInfosStart = (SegmentInfos) infos.Clone();
this.termInfosIndexDivisor = termInfosIndexDivisor;
if (!readOnly)
{
// We assume that this segments_N was previously
// properly sync'd:
SupportClass.CollectionsHelper.AddAllIfNotContains(synced, infos.Files(directory, true));
}
// IndexWriter synchronizes externally before calling
// us, which ensures infos will not change; so there's
// no need to process segments in reverse order
int numSegments = infos.Count;
SegmentReader[] readers = new SegmentReader[numSegments];
Directory dir = writer.GetDirectory();
int upto = 0;
for (int i = 0; i < numSegments; i++)
{
bool success = false;
try
{
SegmentInfo info = infos.Info(i);
if (info.dir == dir)
{
readers[upto++] = writer.readerPool.GetReadOnlyClone(info, true, termInfosIndexDivisor);
}
success = true;
}
finally
{
if (!success)
{
// Close all readers we had opened:
for (upto--; upto >= 0; upto--)
{
try
{
readers[upto].Close();
}
catch (System.Exception ignore)
{
// keep going - we want to clean up as much as possible
}
}
}
}
}
this.writer = writer;
if (upto < readers.Length)
{
// This means some segments were in a foreign Directory
SegmentReader[] newReaders = new SegmentReader[upto];
Array.Copy(readers, 0, newReaders, 0, upto);
readers = newReaders;
}
Initialize(readers);
}
/// <summary>Construct reading the named set of readers. </summary>
internal DirectoryReader(Directory directory, SegmentInfos sis, IndexDeletionPolicy deletionPolicy, bool readOnly, int termInfosIndexDivisor)
{
this.directory = directory;
this.readOnly = readOnly;
this.segmentInfos = sis;
this.deletionPolicy = deletionPolicy;
this.termInfosIndexDivisor = termInfosIndexDivisor;
if (!readOnly)
{
// We assume that this segments_N was previously
// properly sync'd:
SupportClass.CollectionsHelper.AddAllIfNotContains(synced, sis.Files(directory, true));
}
// To reduce the chance of hitting FileNotFound
// (and having to retry), we open segments in
// reverse because IndexWriter merges & deletes
// the newest segments first.
SegmentReader[] readers = new SegmentReader[sis.Count];
for (int i = sis.Count - 1; i >= 0; i--)
{
bool success = false;
try
{
readers[i] = SegmentReader.Get(readOnly, sis.Info(i), termInfosIndexDivisor);
success = true;
}
finally
{
if (!success)
{
// Close all readers we had opened:
for (i++; i < sis.Count; i++)
{
try
{
readers[i].Close();
}
catch (System.Exception ignore)
{
// keep going - we want to clean up as much as possible
}
}
}
}
}
Initialize(readers);
}
internal ReaderCommit(SegmentInfos infos, Directory dir)
{
segmentsFileName = infos.GetCurrentSegmentFileName();
this.dir = dir;
userData = infos.GetUserData();
files = infos.Files(dir, true);
version = infos.GetVersion();
generation = infos.GetGeneration();
isOptimized = infos.Count == 1 && !infos.Info(0).HasDeletions();
}
/// <summary> For definition of "check point" see IndexWriter comments:
/// "Clarification: Check Points (and commits)".
///
/// Writer calls this when it has made a "consistent
/// change" to the index, meaning new files are written to
/// the index and the in-memory SegmentInfos have been
/// modified to point to those files.
///
/// This may or may not be a commit (segments_N may or may
/// not have been written).
///
/// We simply incref the files referenced by the new
/// SegmentInfos and decref the files we had previously
/// seen (if any).
///
/// If this is a commit, we also call the policy to give it
/// a chance to remove other commits. If any commits are
/// removed, we decref their files as well.
/// </summary>
public void Checkpoint(SegmentInfos segmentInfos, bool isCommit)
{
if (infoStream != null)
{
Message("now checkpoint \"" + segmentInfos.GetCurrentSegmentFileName() + "\" [" + segmentInfos.Count + " segments " + "; isCommit = " + isCommit + "]");
}
// Try again now to delete any previously un-deletable
// files (because they were in use, on Windows):
DeletePendingFiles();
// Incref the files:
IncRef(segmentInfos, isCommit);
if (isCommit)
{
// Append to our commits list:
commits.Add(new CommitPoint(this, commitsToDelete, directory, segmentInfos));
// Tell policy so it can remove commits:
policy.OnCommit(commits);
// Decref files for commits that were deleted by the policy:
DeleteCommits();
}
else
{
System.Collections.Generic.IList <string> docWriterFiles;
if (docWriter != null)
{
docWriterFiles = docWriter.OpenFiles();
if (docWriterFiles != null)
{
// We must incRef these files before decRef'ing
// last files to make sure we don't accidentally
// delete them:
IncRef(docWriterFiles);
}
}
else
{
docWriterFiles = null;
}
// DecRef old files from the last checkpoint, if any:
int size = lastFiles.Count;
if (size > 0)
{
for (int i = 0; i < size; i++)
{
DecRef(lastFiles[i]);
}
lastFiles.Clear();
}
// Save files so we can decr on next checkpoint/commit:
foreach (string fname in segmentInfos.Files(directory, false))
{
lastFiles.Add(fname);
}
if (docWriterFiles != null)
{
foreach (string fname in docWriterFiles)
{
lastFiles.Add(fname);
}
}
}
}