public override string ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append("matchVersion=").Append(matchVersion).Append("\n");
sb.Append("analyzer=").Append(analyzer == null ? "null" : analyzer.GetType().Name).Append("\n");
sb.Append("ramBufferSizeMB=").Append(RAMBufferSizeMB).Append("\n");
sb.Append("maxBufferedDocs=").Append(MaxBufferedDocs).Append("\n");
sb.Append("maxBufferedDeleteTerms=").Append(MaxBufferedDeleteTerms).Append("\n");
sb.Append("mergedSegmentWarmer=").Append(MergedSegmentWarmer).Append("\n");
sb.Append("readerTermsIndexDivisor=").Append(ReaderTermsIndexDivisor).Append("\n");
sb.Append("termIndexInterval=").Append(TermIndexInterval).Append("\n"); // TODO: this should be private to the codec, not settable here
sb.Append("delPolicy=").Append(IndexDeletionPolicy.GetType().Name).Append("\n");
IndexCommit commit = IndexCommit;
sb.Append("commit=").Append(commit == null ? "null" : commit.ToString()).Append("\n");
sb.Append("openMode=").Append(OpenMode).Append("\n");
sb.Append("similarity=").Append(Similarity.GetType().Name).Append("\n");
sb.Append("mergeScheduler=").Append(MergeScheduler).Append("\n");
sb.Append("default WRITE_LOCK_TIMEOUT=").Append(IndexWriterConfig.WRITE_LOCK_TIMEOUT).Append("\n");
sb.Append("writeLockTimeout=").Append(WriteLockTimeout).Append("\n");
sb.Append("codec=").Append(Codec).Append("\n");
sb.Append("infoStream=").Append(InfoStream.GetType().Name).Append("\n");
sb.Append("mergePolicy=").Append(MergePolicy).Append("\n");
sb.Append("indexerThreadPool=").Append(IndexerThreadPool).Append("\n");
sb.Append("readerPooling=").Append(UseReaderPooling).Append("\n");
sb.Append("perThreadHardLimitMB=").Append(RAMPerThreadHardLimitMB).Append("\n");
sb.Append("useCompoundFile=").Append(UseCompoundFile).Append("\n");
sb.Append("checkIntegrityAtMerge=").Append(CheckIntegrityAtMerge).Append("\n");
return(sb.ToString());
}
/// <summary>
/// Creates a new config that that handles the live <see cref="IndexWriter"/>
/// settings.
/// </summary>
internal LiveIndexWriterConfig(IndexWriterConfig config)
{
maxBufferedDeleteTerms = config.MaxBufferedDeleteTerms;
maxBufferedDocs = config.MaxBufferedDocs;
mergedSegmentWarmer = config.MergedSegmentWarmer;
ramBufferSizeMB = config.RAMBufferSizeMB;
readerTermsIndexDivisor = config.ReaderTermsIndexDivisor;
termIndexInterval = config.TermIndexInterval;
matchVersion = config.matchVersion;
analyzer = config.Analyzer;
delPolicy = config.IndexDeletionPolicy;
commit = config.IndexCommit;
openMode = config.OpenMode;
similarity = config.Similarity;
mergeScheduler = config.MergeScheduler;
writeLockTimeout = config.WriteLockTimeout;
indexingChain = config.IndexingChain;
codec = config.Codec;
infoStream = config.InfoStream;
mergePolicy = config.MergePolicy;
indexerThreadPool = config.IndexerThreadPool;
readerPooling = config.UseReaderPooling;
flushPolicy = config.FlushPolicy;
perThreadHardLimitMB = config.RAMPerThreadHardLimitMB;
useCompoundFile = config.UseCompoundFile;
checkIntegrityAtMerge = config.CheckIntegrityAtMerge;
}
// used by IndexWriterConfig
internal LiveIndexWriterConfig(Analyzer analyzer, LuceneVersion matchVersion)
{
this.analyzer = analyzer;
this.matchVersion = matchVersion;
ramBufferSizeMB = IndexWriterConfig.DEFAULT_RAM_BUFFER_SIZE_MB;
maxBufferedDocs = IndexWriterConfig.DEFAULT_MAX_BUFFERED_DOCS;
maxBufferedDeleteTerms = IndexWriterConfig.DEFAULT_MAX_BUFFERED_DELETE_TERMS;
readerTermsIndexDivisor = IndexWriterConfig.DEFAULT_READER_TERMS_INDEX_DIVISOR;
mergedSegmentWarmer = null;
termIndexInterval = IndexWriterConfig.DEFAULT_TERM_INDEX_INTERVAL; // TODO: this should be private to the codec, not settable here
delPolicy = new KeepOnlyLastCommitDeletionPolicy();
commit = null;
useCompoundFile = IndexWriterConfig.DEFAULT_USE_COMPOUND_FILE_SYSTEM;
openMode = Index.OpenMode.CREATE_OR_APPEND;
similarity = IndexSearcher.DefaultSimilarity;
#if !FEATURE_CONCURRENTMERGESCHEDULER
mergeScheduler = new TaskMergeScheduler();
#else
mergeScheduler = new ConcurrentMergeScheduler();
#endif
writeLockTimeout = IndexWriterConfig.WRITE_LOCK_TIMEOUT;
indexingChain = DocumentsWriterPerThread.DefaultIndexingChain;
codec = Codec.Default;
if (codec == null)
{
throw new System.NullReferenceException();
}
infoStream = Util.InfoStream.Default;
mergePolicy = new TieredMergePolicy();
flushPolicy = new FlushByRamOrCountsPolicy();
readerPooling = IndexWriterConfig.DEFAULT_READER_POOLING;
indexerThreadPool = new ThreadAffinityDocumentsWriterThreadPool(IndexWriterConfig.DEFAULT_MAX_THREAD_STATES);
perThreadHardLimitMB = IndexWriterConfig.DEFAULT_RAM_PER_THREAD_HARD_LIMIT_MB;
}
/// <summary>
/// <see cref="PersistentSnapshotDeletionPolicy"/> wraps another
/// <see cref="IndexDeletionPolicy"/> to enable flexible snapshotting.
/// </summary>
/// <param name="primary">
/// the <see cref="IndexDeletionPolicy"/> that is used on non-snapshotted
/// commits. Snapshotted commits, by definition, are not deleted until
/// explicitly released via <see cref="Release(IndexCommit)"/>. </param>
/// <param name="dir">
/// the <see cref="Directory"/> which will be used to persist the snapshots
/// information. </param>
/// <param name="mode">
/// specifies whether a new index should be created, deleting all
/// existing snapshots information (immediately), or open an existing
/// index, initializing the class with the snapshots information. </param>
public PersistentSnapshotDeletionPolicy(IndexDeletionPolicy primary, Directory dir, OpenMode mode)
: base(primary)
{
this.dir = dir;
if (mode == OpenMode.CREATE)
{
ClearPriorSnapshots();
}
LoadPriorSnapshots();
if (mode == OpenMode.APPEND && nextWriteGen == 0)
{
throw IllegalStateException.Create("no snapshots stored in this directory");
}
}
/// <summary>
/// Initialize the deleter: find all previous commits in
/// the <see cref="Directory"/>, incref the files they reference, call
/// the policy to let it delete commits. this will remove
/// any files not referenced by any of the commits. </summary>
/// <exception cref="IOException"> if there is a low-level IO error </exception>
public IndexFileDeleter(Directory directory, IndexDeletionPolicy policy, SegmentInfos segmentInfos, InfoStream infoStream, IndexWriter writer, bool initialIndexExists)
{
this.infoStream = infoStream;
this.writer = writer;
string currentSegmentsFile = segmentInfos.GetSegmentsFileName();
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "init: current segments file is \"" + currentSegmentsFile + "\"; deletionPolicy=" + policy);
}
this.policy = policy;
this.directory = directory;
// First pass: walk the files and initialize our ref
// counts:
long currentGen = segmentInfos.Generation;
CommitPoint currentCommitPoint = null;
string[] files /* = null*/;
try
{
files = directory.ListAll();
}
catch (DirectoryNotFoundException) // LUCENENET: IDE0059: Remove unnecessary value assignment
{
// it means the directory is empty, so ignore it.
files = Arrays.Empty <string>();
}
if (currentSegmentsFile != null)
{
Regex r = IndexFileNames.CODEC_FILE_PATTERN;
foreach (string fileName in files)
{
if (!fileName.EndsWith("write.lock", StringComparison.Ordinal) && !fileName.Equals(IndexFileNames.SEGMENTS_GEN, StringComparison.Ordinal) &&
(r.IsMatch(fileName) || fileName.StartsWith(IndexFileNames.SEGMENTS, StringComparison.Ordinal)))
{
// Add this file to refCounts with initial count 0:
GetRefCount(fileName);
if (fileName.StartsWith(IndexFileNames.SEGMENTS, StringComparison.Ordinal))
{
// this is a commit (segments or segments_N), and
// it's valid (<= the max gen). Load it, then
// incref all files it refers to:
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "init: load commit \"" + fileName + "\"");
}
SegmentInfos sis = new SegmentInfos();
try
{
sis.Read(directory, fileName);
}
#pragma warning disable 168
catch (FileNotFoundException e)
#pragma warning restore 168
{
// LUCENE-948: on NFS (and maybe others), if
// you have writers switching back and forth
// between machines, it's very likely that the
// dir listing will be stale and will claim a
// file segments_X exists when in fact it
// doesn't. So, we catch this and handle it
// as if the file does not exist
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "init: hit FileNotFoundException when loading commit \"" + fileName + "\"; skipping this commit point");
}
sis = null;
}
// LUCENENET specific - .NET (thankfully) only has one FileNotFoundException, so we don't need this
//catch (NoSuchFileException)
//{
// // LUCENE-948: on NFS (and maybe others), if
// // you have writers switching back and forth
// // between machines, it's very likely that the
// // dir listing will be stale and will claim a
// // file segments_X exists when in fact it
// // doesn't. So, we catch this and handle it
// // as if the file does not exist
// if (infoStream.IsEnabled("IFD"))
// {
// infoStream.Message("IFD", "init: hit FileNotFoundException when loading commit \"" + fileName + "\"; skipping this commit point");
// }
// sis = null;
//}
// LUCENENET specific - since NoSuchDirectoryException subclasses FileNotFoundException
// in Lucene, we need to catch it here to be on the safe side.
catch (DirectoryNotFoundException)
{
// LUCENE-948: on NFS (and maybe others), if
// you have writers switching back and forth
// between machines, it's very likely that the
// dir listing will be stale and will claim a
// file segments_X exists when in fact it
// doesn't. So, we catch this and handle it
// as if the file does not exist
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "init: hit FileNotFoundException when loading commit \"" + fileName + "\"; skipping this commit point");
}
sis = null;
}
catch (IOException /*e*/)
{
if (SegmentInfos.GenerationFromSegmentsFileName(fileName) <= currentGen && directory.FileLength(fileName) > 0)
{
throw; // LUCENENET: CA2200: Rethrow to preserve stack details (https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2200-rethrow-to-preserve-stack-details)
}
else
{
// Most likely we are opening an index that
// has an aborted "future" commit, so suppress
// exc in this case
sis = null;
}
}
if (sis != null)
{
CommitPoint commitPoint = new CommitPoint(commitsToDelete, directory, sis);
if (sis.Generation == segmentInfos.Generation)
{
currentCommitPoint = commitPoint;
}
commits.Add(commitPoint);
IncRef(sis, true);
if (lastSegmentInfos == null || sis.Generation > lastSegmentInfos.Generation)
{
lastSegmentInfos = sis;
}
}
}
}
}
}
if (currentCommitPoint == null && currentSegmentsFile != null && initialIndexExists)
{
// We did not in fact see the segments_N file
// corresponding to the segmentInfos that was passed
// in. Yet, it must exist, because our caller holds
// the write lock. this can happen when the directory
// listing was stale (eg when index accessed via NFS
// client with stale directory listing cache). So we
// try now to explicitly open this commit point:
SegmentInfos sis = new SegmentInfos();
try
{
sis.Read(directory, currentSegmentsFile);
}
catch (IOException e)
{
throw new CorruptIndexException("failed to locate current segments_N file \"" + currentSegmentsFile + "\"" + e.ToString(), e);
}
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "forced open of current segments file " + segmentInfos.GetSegmentsFileName());
}
currentCommitPoint = new CommitPoint(commitsToDelete, directory, sis);
commits.Add(currentCommitPoint);
IncRef(sis, true);
}
// We keep commits list in sorted order (oldest to newest):
CollectionUtil.TimSort(commits);
// Now delete anything with ref count at 0. These are
// presumably abandoned files eg due to crash of
// IndexWriter.
foreach (KeyValuePair <string, RefCount> entry in refCounts)
{
RefCount rc = entry.Value;
string fileName = entry.Key;
if (0 == rc.count)
{
if (infoStream.IsEnabled("IFD"))
{
infoStream.Message("IFD", "init: removing unreferenced file \"" + fileName + "\"");
}
DeleteFile(fileName);
}
}
// Finally, give policy a chance to remove things on
// startup:
this.policy.OnInit(commits);
// Always protect the incoming segmentInfos since
// sometime it may not be the most recent commit
Checkpoint(segmentInfos, false);
startingCommitDeleted = currentCommitPoint == null ? false : currentCommitPoint.IsDeleted;
DeleteCommits();
}
/// <summary>
/// Sole constructor, taking the incoming
/// <see cref="IndexDeletionPolicy"/> to wrap.
/// </summary>
public SnapshotDeletionPolicy(IndexDeletionPolicy primary)
{
this.primary = primary;
}
/// <summary>
/// <see cref="PersistentSnapshotDeletionPolicy"/> wraps another
/// <see cref="IndexDeletionPolicy"/> to enable flexible
/// snapshotting, passing <see cref="OpenMode.CREATE_OR_APPEND"/>
/// by default.
/// </summary>
/// <param name="primary">
/// the <see cref="IndexDeletionPolicy"/> that is used on non-snapshotted
/// commits. Snapshotted commits, by definition, are not deleted until
/// explicitly released via <see cref="Release(IndexCommit)"/>. </param>
/// <param name="dir">
/// the <see cref="Directory"/> which will be used to persist the snapshots
/// information. </param>
public PersistentSnapshotDeletionPolicy(IndexDeletionPolicy primary, Directory dir)
: this(primary, dir, OpenMode.CREATE_OR_APPEND)
{
}
