| /* |
| * 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.nemo.runtime.executor.datatransfer; |
| |
| import org.apache.nemo.common.ir.vertex.IRVertex; |
| import org.apache.nemo.common.ir.vertex.executionproperty.ParallelismProperty; |
| import org.apache.nemo.runtime.executor.data.DataUtil; |
| |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| |
| /** |
| * Represents the input data transfer to a task. |
| */ |
| public interface InputReader { |
| /** |
| * Reads input data depending on the communication pattern of the srcVertex. |
| * |
| * @return the read data. |
| */ |
| List<CompletableFuture<DataUtil.IteratorWithNumBytes>> read(); |
| |
| IRVertex getSrcIrVertex(); |
| |
| static int getSourceParallelism(final InputReader inputReader) { |
| return inputReader.getSrcIrVertex().getPropertyValue(ParallelismProperty.class) |
| .orElseThrow(() -> new IllegalStateException(inputReader.getSrcIrVertex().getId())); |
| } |
| } |