ZanderXu commented on code in PR #6833:
URL: https://github.com/apache/hadoop/pull/6833#discussion_r1607542930
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/StateStoreRecordOperations.java:
##########
@@ -127,6 +128,17 @@ <T extends BaseRecord> StateStoreOperationResult putAll(
@AtMostOnce
<T extends BaseRecord> boolean remove(T record) throws IOException;
+ /**
+ * Remove multiple records.
+ *
+ * @param <T> Record class of the records.
+ * @param records Records to be removed.
+ * @return Map of record -> boolean indicating any entries being deleted by
this record.
Review Comment:
`Map of record -> boolean indicating if the record has being removed
successfully`
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/StateStoreRecordOperations.java:
##########
@@ -152,4 +164,17 @@ <T extends BaseRecord> StateStoreOperationResult putAll(
<T extends BaseRecord> int remove(Class<T> clazz, Query<T> query)
throws IOException;
+ /**
+ * Remove all records of a specific class that match any query in a list of
queries.
+ * Requires the getAll implementation to fetch fresh records on each call.
+ *
+ * @param clazz The class to match the records with.
+ * @param queries Queries (logical OR) to filter what to remove.
+ * @param <T> Record class of the records.
+ * @return Map of query to number of records deleted by that query.
Review Comment:
`Map of query to number of records removed by that query.`
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