szetszwo commented on code in PR #4424:
URL: https://github.com/apache/ozone/pull/4424#discussion_r1147019643


##########
hadoop-hdds/framework/src/main/java/org/apache/hadoop/hdds/utils/db/RDBBatchOperation.java:
##########
@@ -18,18 +18,225 @@
  */
 package org.apache.hadoop.hdds.utils.db;
 
+import com.google.common.base.Preconditions;
 import org.apache.hadoop.hdds.utils.db.RocksDatabase.ColumnFamily;
 import org.apache.hadoop.hdds.utils.db.managed.ManagedWriteBatch;
 import org.apache.hadoop.hdds.utils.db.managed.ManagedWriteOptions;
+import org.apache.ratis.util.StringUtils;
+import org.apache.ratis.util.TraditionalBinaryPrefix;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Supplier;
 
 /**
  * Batch operation implementation for rocks db.
  */
 public class RDBBatchOperation implements BatchOperation {

Review Comment:
   Note that this is an existing class (not added by this change).  However, we 
could add the javadoc here.



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