internal DirectoryReader DoOpenIfChanged(SegmentInfos infos)
{
return(StandardDirectoryReader.Open(m_directory, infos, GetSequentialSubReaders().OfType <AtomicReader>().ToList(), termInfosIndexDivisor));
}
/// <summary>
/// Used by near real-time search </summary>
internal static DirectoryReader Open(IndexWriter writer, SegmentInfos infos, bool applyAllDeletes)
{
// 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;
IList <SegmentReader> readers = new List <SegmentReader>();
Directory dir = writer.Directory;
SegmentInfos segmentInfos = (SegmentInfos)infos.Clone();
int infosUpto = 0;
bool success = false;
try
{
for (int i = 0; i < numSegments; i++)
{
// NOTE: important that we use infos not
// segmentInfos here, so that we are passing the
// actual instance of SegmentInfoPerCommit in
// IndexWriter's segmentInfos:
SegmentCommitInfo info = infos.Info(i);
Debug.Assert(info.Info.Dir == dir);
ReadersAndUpdates rld = writer.readerPool.Get(info, true);
try
{
SegmentReader reader = rld.GetReadOnlyClone(IOContext.READ);
if (reader.NumDocs > 0 || writer.KeepFullyDeletedSegments)
{
// Steal the ref:
readers.Add(reader);
infosUpto++;
}
else
{
reader.DecRef();
segmentInfos.Remove(infosUpto);
}
}
finally
{
writer.readerPool.Release(rld);
}
}
writer.IncRefDeleter(segmentInfos);
StandardDirectoryReader result = new StandardDirectoryReader(dir, readers.ToArray(), writer, segmentInfos, writer.Config.ReaderTermsIndexDivisor, applyAllDeletes);
success = true;
return(result);
}
finally
{
if (!success)
{
foreach (SegmentReader r in readers)
{
try
{
r.DecRef();
}
#pragma warning disable 168
catch (Exception th)
#pragma warning restore 168
{
// ignore any exception that is thrown here to not mask any original
// exception.
}
}
}
}
}
/// <summary>
/// Expert: Returns a <see cref="IndexReader"/> reading the index in the given
/// <see cref="Store.Directory"/> with the given termInfosIndexDivisor. </summary>
/// <param name="directory"> the index directory </param>
/// <param name="termInfosIndexDivisor"> Subsamples which indexed
/// terms are loaded into RAM. this has the same effect as setting
/// <see cref="LiveIndexWriterConfig.TermIndexInterval"/> (on <see cref="IndexWriterConfig"/>) except that setting
/// must be done at indexing time while this setting can be
/// set per reader. When set to N, then one in every
/// N*termIndexInterval terms in the index is loaded into
/// memory. By setting this to a value > 1 you can reduce
/// memory usage, at the expense of higher latency when
/// loading a TermInfo. The default value is 1. Set this
/// to -1 to skip loading the terms index entirely.
/// <b>NOTE:</b> divisor settings > 1 do not apply to all <see cref="Codecs.PostingsFormat"/>
/// implementations, including the default one in this release. It only makes
/// sense for terms indexes that can efficiently re-sample terms at load time. </param>
/// <exception cref="IOException"> if there is a low-level IO error </exception>
new public static DirectoryReader Open(Directory directory, int termInfosIndexDivisor)
{
return(StandardDirectoryReader.Open(directory, null, termInfosIndexDivisor));
}
public FindSegmentsFileAnonymousInnerClassHelper2(StandardDirectoryReader outerInstance, Directory directory)
: base(directory)
{
this.outerInstance = outerInstance;
}
/// <summary>
/// Returns a <see cref="IndexReader"/> reading the index in the given
/// <see cref="Store.Directory"/> </summary>
/// <param name="directory"> the index directory </param>
/// <exception cref="IOException"> if there is a low-level IO error </exception>
new public static DirectoryReader Open(Directory directory)
{
return(StandardDirectoryReader.Open(directory, null, DEFAULT_TERMS_INDEX_DIVISOR));
}
/// <summary>
/// Expert: returns an <see cref="IndexReader"/> reading the index in the given
/// <seealso cref="Index.IndexCommit"/> and <paramref name="termInfosIndexDivisor"/>. </summary>
/// <param name="commit"> the commit point to open </param>
/// <param name="termInfosIndexDivisor"> Subsamples which indexed
/// terms are loaded into RAM. this has the same effect as setting
/// <see cref="LiveIndexWriterConfig.TermIndexInterval"/> (on <see cref="IndexWriterConfig"/>) except that setting
/// must be done at indexing time while this setting can be
/// set per reader. When set to N, then one in every
/// N*termIndexInterval terms in the index is loaded into
/// memory. By setting this to a value > 1 you can reduce
/// memory usage, at the expense of higher latency when
/// loading a TermInfo. The default value is 1. Set this
/// to -1 to skip loading the terms index entirely.
/// <b>NOTE:</b> divisor settings > 1 do not apply to all <see cref="Codecs.PostingsFormat"/>
/// implementations, including the default one in this release. It only makes
/// sense for terms indexes that can efficiently re-sample terms at load time. </param>
/// <exception cref="IOException"> if there is a low-level IO error </exception>
new public static DirectoryReader Open(IndexCommit commit, int termInfosIndexDivisor)
{
return(StandardDirectoryReader.Open(commit.Directory, commit, termInfosIndexDivisor));
}
/// <summary>
/// Expert: returns an <see cref="IndexReader"/> reading the index in the given
/// <see cref="Index.IndexCommit"/>. </summary>
/// <param name="commit"> the commit point to open </param>
/// <exception cref="IOException"> if there is a low-level IO error </exception>
new public static DirectoryReader Open(IndexCommit commit)
{
return(StandardDirectoryReader.Open(commit.Directory, commit, DEFAULT_TERMS_INDEX_DIVISOR));
}
/// <summary>
/// Used by near real-time search </summary>
internal static DirectoryReader Open(IndexWriter writer, SegmentInfos infos, bool applyAllDeletes)
{
// 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.Size();
IList<SegmentReader> readers = new List<SegmentReader>();
Directory dir = writer.Directory;
SegmentInfos segmentInfos = (SegmentInfos)infos.Clone();
int infosUpto = 0;
bool success = false;
try
{
for (int i = 0; i < numSegments; i++)
{
// NOTE: important that we use infos not
// segmentInfos here, so that we are passing the
// actual instance of SegmentInfoPerCommit in
// IndexWriter's segmentInfos:
SegmentCommitInfo info = infos.Info(i);
Debug.Assert(info.Info.Dir == dir);
ReadersAndUpdates rld = writer.readerPool.Get(info, true);
try
{
SegmentReader reader = rld.GetReadOnlyClone(IOContext.READ);
if (reader.NumDocs > 0 || writer.KeepFullyDeletedSegments)
{
// Steal the ref:
readers.Add(reader);
infosUpto++;
}
else
{
reader.DecRef();
segmentInfos.Remove(infosUpto);
}
}
finally
{
writer.readerPool.Release(rld);
}
}
writer.IncRefDeleter(segmentInfos);
StandardDirectoryReader result = new StandardDirectoryReader(dir, readers.ToArray(), writer, segmentInfos, writer.Config.ReaderTermsIndexDivisor, applyAllDeletes);
success = true;
return result;
}
finally
{
if (!success)
{
foreach (SegmentReader r in readers)
{
try
{
r.DecRef();
}
catch (Exception th)
{
// ignore any exception that is thrown here to not mask any original
// exception.
}
}
}
}
}
public FindSegmentsFileAnonymousInnerClassHelper2(StandardDirectoryReader outerInstance, Directory directory)
: base(directory)
{
this.OuterInstance = outerInstance;
}
