[GitHub] StefanRRichter commented on a change in pull request #7674: [FLINK-10043] [State Backends] Refactor RocksDBKeyedStateBackend object construction/initialization/restore code

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StefanRRichter commented on a change in pull request #7674: [FLINK-10043] [State Backends] Refactor RocksDBKeyedStateBackend object construction/initialization/restore code
URL: https://github.com/apache/flink/pull/7674#discussion_r255904369
 
 

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 File path: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/SupplierWithInputAndException.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.streaming.api.operators;
+
+import org.apache.flink.annotation.Public;
+
+import javax.annotation.Nonnull;
+
+/**
+ * A functional interface for a {@link java.util.function.Supplier} that may
+ * throw exceptions.
+ *
+ * @param <I> The type of the input for the supplier
+ * @param <R> The type of the result of the supplier.
+ * @param <E> The type of Exceptions thrown by this function.
+ */
+@Public
+@FunctionalInterface
+public interface SupplierWithInputAndException<I, R, E extends Throwable> {
 
 Review comment:
   I think we don't need this interface because it is basically the same as `FunctionWithException`, the behaviour is also more like a function: takes an input to produce an output.

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