void addBlobStore(BlobStore store) {
    if (compactionExecutor == null) {
      stores.add(store);
    } else {
      // we first disable compaction on new store and then add it into stores set
      compactionExecutor.controlCompactionForBlobStore(store, false);
      stores.add(store);
    }
  }
Add a new BlobStore into Compaction Manager.
@param store the {@link BlobStore} which would be added.
ambry-store/src/main/java/com/github/ambry/store/CompactionManager.java