@Override
        public void call(RegionObserver observer) throws IOException {
          observer.postCompact(this, store, resultFile, tracker, request);
        }
Called after the store compaction has completed.
@param store      the store being compacted
@param resultFile the new store file written during compaction
@param tracker    used to track the life cycle of a compaction
@param request    the compaction request
@param user       the user
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java