HDFS-16943. RBF: Implements MySQL based StateStoreDriver. (#5469)

Author: simbadzina

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/StateStoreDriver.java

@@ -20,6 +20,8 @@
 import java.net.InetAddress;
 import java.util.Collection;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.server.federation.metrics.StateStoreMetrics;
 import org.apache.hadoop.hdfs.server.federation.store.StateStoreService;
@@ -35,6 +37,8 @@
  * provider. Driver implementations will extend this class and implement some of
  * the default methods.
  */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving
 public abstract class StateStoreDriver implements StateStoreRecordOperations {
 
   private static final Logger LOG =

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreBaseImpl.java

@@ -23,6 +23,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hdfs.server.federation.store.StateStoreUtils;
 import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver;
 import org.apache.hadoop.hdfs.server.federation.store.records.BaseRecord;
@@ -39,6 +41,8 @@
  * optimization, such as custom get/put/remove queries, depending on the
  * capabilities of the data store.
  */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving
 public abstract class StateStoreBaseImpl extends StateStoreDriver {
 
   @Override