CompactionDetails getCompactionDetailsInProgress() {
    if (compactionLog == null) {
      throw new IllegalStateException("There is no compaction in progress");
    }
    return compactionLog.getCompactionDetails();
  }
Filters deprecated {@link Container}s for compaction purpose. Deprecated containers include DELETE_IN_PROGRESS
containers met with retention time and all INACTIVE containers.
ambry-store/src/main/java/com/github/ambry/store/BlobStoreCompactor.java