internal CompoundFileWriter(Directory dir, System.String name, SegmentMerger.CheckAbort checkAbort)
{
if (dir == null)
throw new System.NullReferenceException("directory cannot be null");
if (name == null)
throw new System.NullReferenceException("name cannot be null");
this.checkAbort = checkAbort;
directory = dir;
fileName = name;
ids = new System.Collections.Hashtable();
entries = new System.Collections.ArrayList();
}
/* FIXME if we want to support non-contiguous segment merges */
private bool CommitMerge(MergePolicy.OneMerge merge, SegmentMerger merger, int mergedDocCount, SegmentReader mergedReader)
{
lock (this)
{
System.Diagnostics.Debug.Assert(TestPoint("startCommitMerge"));
if (hitOOM)
{
throw new System.SystemException("this writer hit an OutOfMemoryError; cannot complete merge");
}
if (infoStream != null)
Message("commitMerge: " + merge.SegString(directory) + " index=" + SegString());
System.Diagnostics.Debug.Assert(merge.registerDone);
// If merge was explicitly aborted, or, if rollback() or
// rollbackTransaction() had been called since our merge
// started (which results in an unqualified
// deleter.refresh() call that will remove any index
// file that current segments does not reference), we
// abort this merge
if (merge.IsAborted())
{
if (infoStream != null)
Message("commitMerge: skipping merge " + merge.SegString(directory) + ": it was aborted");
return false;
}
int start = EnsureContiguousMerge(merge);
CommitMergedDeletes(merge, mergedReader);
docWriter.RemapDeletes(segmentInfos, merger.GetDocMaps(), merger.GetDelCounts(), merge, mergedDocCount);
// If the doc store we are using has been closed and
// is in now compound format (but wasn't when we
// started), then we will switch to the compound
// format as well:
SetMergeDocStoreIsCompoundFile(merge);
merge.info.SetHasProx(merger.HasProx());
((System.Collections.IList) ((System.Collections.ArrayList) segmentInfos).GetRange(start, start + merge.segments.Count - start)).Clear();
System.Diagnostics.Debug.Assert(!segmentInfos.Contains(merge.info));
segmentInfos.Insert(start, merge.info);
CloseMergeReaders(merge, false);
// Must note the change to segmentInfos so any commits
// in-flight don't lose it:
Checkpoint();
// If the merged segments had pending changes, clear
// them so that they don't bother writing them to
// disk, updating SegmentInfo, etc.:
readerPool.Clear(merge.segments);
if (merge.optimize)
{
// cascade the optimize:
segmentsToOptimize[merge.info] = merge.info;
}
return 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;
}
public AnonymousClassFieldSelector(SegmentMerger enclosingInstance)
{
InitBlock(enclosingInstance);
}
/// <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();
}
}
}
internal AnonymousClassCheckAbort1(SegmentMerger enclosingInstance, Mono.Lucene.Net.Index.MergePolicy.OneMerge Param1, Mono.Lucene.Net.Store.Directory Param2):base(Param1, Param2)
{
InitBlock(enclosingInstance);
}
private void InitBlock(SegmentMerger enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
public AnonymousClassFieldSelector(SegmentMerger enclosingInstance)
{
InitBlock(enclosingInstance);
}
internal AnonymousClassCheckAbort1(SegmentMerger enclosingInstance, Mono.Lucene.Net.Index.MergePolicy.OneMerge Param1, Mono.Lucene.Net.Store.Directory Param2) : base(Param1, Param2)
{
InitBlock(enclosingInstance);
}
private void InitBlock(SegmentMerger enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
