private bool UpdatePendingMerges(MergeTrigger trigger, int maxNumSegments)
{
lock (this)
{
Debug.Assert(maxNumSegments == -1 || maxNumSegments > 0);
Debug.Assert(trigger != null);
if (StopMerges)
{
return false;
}
// Do not start new merges if we've hit OOME
if (HitOOM)
{
return false;
}
bool newMergesFound = false;
MergePolicy.MergeSpecification spec;
if (maxNumSegments != UNBOUNDED_MAX_MERGE_SEGMENTS)
{
Debug.Assert(trigger == MergeTrigger.EXPLICIT || trigger == MergeTrigger.MERGE_FINISHED, "Expected EXPLICT or MERGE_FINISHED as trigger even with maxNumSegments set but was: " + trigger.ToString());
spec = mergePolicy.FindForcedMerges(segmentInfos, maxNumSegments, SegmentsToMerge);
newMergesFound = spec != null;
if (newMergesFound)
{
int numMerges = spec.Merges.Count;
for (int i = 0; i < numMerges; i++)
{
MergePolicy.OneMerge merge = spec.Merges[i];
merge.MaxNumSegments = maxNumSegments;
}
}
}
else
{
spec = mergePolicy.FindMerges(trigger, segmentInfos);
}
newMergesFound = spec != null;
if (newMergesFound)
{
int numMerges = spec.Merges.Count;
for (int i = 0; i < numMerges; i++)
{
RegisterMerge(spec.Merges[i]);
}
}
return newMergesFound;
}
}
