austince commented on a change in pull request #15348: URL: https://github.com/apache/flink/pull/15348#discussion_r601923051
########## File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/VertexParallelismInformation.java ########## @@ -0,0 +1,55 @@ +/* + * 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.runtime.executiongraph; + +/** + * Manages the parallelism properties for a vertex in the execution graph, as well as how they can + * change during runtime. + */ +public interface VertexParallelismInformation { + /** + * Returns a vertex's parallelism. + * + * @return the parallelism for the vertex + */ + int getParallelism(); + + /** + * Returns the vertex's max parallelism. + * + * @return the max parallelism for the vertex + */ + int getMaxParallelism(); + + /** + * Changes a given vertex's max parallelism property. The caller should first check the validity + * of the new setting via {@link #canRescaleMaxParallelism}, otherwise this operation may fail. + * + * @param maxParallelism the new max parallelism for the vertex + */ + void setMaxParallelism(int maxParallelism); + + /** + * Returns whether the vertex's max parallelism can be changed to a given value. + * + * @param desiredMaxParallelism the desired max parallelism for the vertex + * @return whether the max parallelism can be changed to the given value + */ + boolean canRescaleMaxParallelism(int desiredMaxParallelism); Review comment: These can be removed after we move the state restore logic to before ExecutionGraph creation. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
