/// <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);
}
}
}
