public override MergeSpecification FindForcedMerges(SegmentInfos infos, int maxSegmentCount, IDictionary <SegmentCommitInfo, bool?> segmentsToMerge)
{
if (Verbose())
{
Message("findForcedMerges maxSegmentCount=" + maxSegmentCount + " infos=" + Writer.Get().SegString(infos.Segments) + " segmentsToMerge=" + segmentsToMerge);
}
List <SegmentCommitInfo> eligible = new List <SegmentCommitInfo>();
bool forceMergeRunning = false;
ICollection <SegmentCommitInfo> merging = Writer.Get().MergingSegments;
bool?segmentIsOriginal = false;
foreach (SegmentCommitInfo info in infos.Segments)
{
bool?isOriginal = segmentsToMerge[info];
if (isOriginal != null)
{
segmentIsOriginal = isOriginal;
if (!merging.Contains(info))
{
eligible.Add(info);
}
else
{
forceMergeRunning = true;
}
}
}
if (eligible.Count == 0)
{
return(null);
}
if ((maxSegmentCount > 1 && eligible.Count <= maxSegmentCount) || (maxSegmentCount == 1 && eligible.Count == 1 && (segmentIsOriginal == false || IsMerged(infos, eligible[0]))))
{
if (Verbose())
{
Message("already merged");
}
return(null);
}
eligible.Sort(new SegmentByteSizeDescending(this));
if (Verbose())
{
Message("eligible=" + eligible);
Message("forceMergeRunning=" + forceMergeRunning);
}
int end = eligible.Count;
MergeSpecification spec = null;
// Do full merges, first, backwards:
while (end >= MaxMergeAtOnceExplicit_Renamed + maxSegmentCount - 1)
{
if (spec == null)
{
spec = new MergeSpecification();
}
OneMerge merge = new OneMerge(eligible.SubList(end - MaxMergeAtOnceExplicit_Renamed, end));
if (Verbose())
{
Message("add merge=" + Writer.Get().SegString(merge.Segments));
}
spec.Add(merge);
end -= MaxMergeAtOnceExplicit_Renamed;
}
if (spec == null && !forceMergeRunning)
{
// Do final merge
int numToMerge = end - maxSegmentCount + 1;
OneMerge merge = new OneMerge(eligible.SubList(end - numToMerge, end));
if (Verbose())
{
Message("add final merge=" + merge.SegString(Writer.Get().Directory));
}
spec = new MergeSpecification();
spec.Add(merge);
}
return(spec);
}
