| /* |
| * 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.iteration.utils; |
| |
| import org.apache.flink.core.memory.ManagedMemoryUseCase; |
| import org.apache.flink.streaming.api.datastream.DataStream; |
| import org.apache.flink.table.api.TableException; |
| |
| import java.util.Optional; |
| |
| /** Provides utility functions for {@link DataStream}. */ |
| public class DataStreamUtils { |
| |
| /** |
| * Sets {Transformation#declareManagedMemoryUseCaseAtOperatorScope(ManagedMemoryUseCase, int)} |
| * using the given bytes for {@link ManagedMemoryUseCase#OPERATOR}. |
| * |
| * <p>This method is in reference to Flink's ExecNodeUtil.setManagedMemoryWeight. The provided |
| * bytes should be in the same scale as existing usage in Flink, for example, |
| * StreamExecWindowAggregate.WINDOW_AGG_MEMORY_RATIO. |
| */ |
| public static <T> void setManagedMemoryWeight(DataStream<T> dataStream, long memoryBytes) { |
| if (memoryBytes > 0) { |
| final int weightInMebibyte = Math.max(1, (int) (memoryBytes >> 20)); |
| final Optional<Integer> previousWeight = |
| dataStream |
| .getTransformation() |
| .declareManagedMemoryUseCaseAtOperatorScope( |
| ManagedMemoryUseCase.OPERATOR, weightInMebibyte); |
| if (previousWeight.isPresent()) { |
| throw new TableException( |
| "Managed memory weight has been set, this should not happen."); |
| } |
| } |
| } |
| } |