Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r168468245
--- Diff:
flink-core/src/main/java/org/apache/flink/util/ThrowingSupplier.java ---
@@ -0,0 +1,38 @@
+/*
+ * 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.util;
+
+/**
+ * This interface is basically Java's {@link java.util.function.Supplier}
interface enhanced with the ability to throw
+ * an exception.
+ *
+ * @param <OUT> type of the supplied result.
+ * @param <T> type of {@link Throwable}.
+ */
+@FunctionalInterface
+public interface ThrowingSupplier<OUT, T extends Throwable> {
+
+ /**
+ * Gets a result.
+ *
+ * @return a result.
+ * @throws T on errors.
+ */
+ OUT get() throws T, Exception;
+}
--- End diff --
I think we have `SupplierWithException`, which fulfills the same purpose.
---
