| /* |
| * 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.wayang.flink.operators; |
| |
| import org.apache.flink.api.common.functions.ReduceFunction; |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.wayang.basic.operators.GlobalReduceOperator; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.function.ReduceDescriptor; |
| import org.apache.wayang.core.optimizer.OptimizationContext; |
| import org.apache.wayang.core.optimizer.costs.LoadProfileEstimator; |
| import org.apache.wayang.core.optimizer.costs.LoadProfileEstimators; |
| import org.apache.wayang.core.plan.wayangplan.ExecutionOperator; |
| import org.apache.wayang.core.platform.ChannelDescriptor; |
| import org.apache.wayang.core.platform.ChannelInstance; |
| import org.apache.wayang.core.platform.lineage.ExecutionLineageNode; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.util.Tuple; |
| import org.apache.wayang.flink.channels.DataSetChannel; |
| import org.apache.wayang.flink.execution.FlinkExecutor; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Optional; |
| |
| /** |
| * Flink implementation of the {@link GlobalReduceOperator}. |
| */ |
| public class FlinkGlobalReduceOperator<Type> |
| extends GlobalReduceOperator<Type> |
| implements FlinkExecutionOperator { |
| |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param type type of the reduce elements (i.e., type of {@link #getInput()} and {@link #getOutput()}) |
| * @param reduceDescriptor describes the reduction to be performed on the elements |
| */ |
| public FlinkGlobalReduceOperator(DataSetType<Type> type, |
| ReduceDescriptor<Type> reduceDescriptor) { |
| super(reduceDescriptor, type); |
| } |
| |
| /** |
| * Copies an instance (exclusive of broadcasts). |
| * |
| * @param that that should be copied |
| */ |
| public FlinkGlobalReduceOperator(GlobalReduceOperator<Type> that) { |
| super(that); |
| } |
| |
| @Override |
| public Tuple<Collection<ExecutionLineageNode>, Collection<ChannelInstance>> evaluate( |
| ChannelInstance[] inputs, |
| ChannelInstance[] outputs, |
| FlinkExecutor flinkExecutor, |
| OptimizationContext.OperatorContext operatorContext) { |
| assert inputs.length == this.getNumInputs(); |
| assert outputs.length == this.getNumOutputs(); |
| |
| final DataSetChannel.Instance input = (DataSetChannel.Instance) inputs[0]; |
| final DataSetChannel.Instance output = (DataSetChannel.Instance) outputs[0]; |
| |
| final DataSet<Type> dataSetInput = input.provideDataSet(); |
| |
| |
| final ReduceFunction<Type> reduceFunction = flinkExecutor.getCompiler().compile(this.reduceDescriptor); |
| |
| |
| DataSet<Type> datasetOutput = null; |
| try { |
| datasetOutput = dataSetInput.reduce(reduceFunction); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| |
| output.accept(datasetOutput, flinkExecutor); |
| return ExecutionOperator.modelLazyExecution(inputs, outputs, operatorContext); |
| } |
| |
| @Override |
| protected ExecutionOperator createCopy() { |
| return new FlinkGlobalReduceOperator<>(this.getInputType(), this.getReduceDescriptor()); |
| } |
| |
| @Override |
| public String getLoadProfileEstimatorConfigurationKey() { |
| return "wayang.flink.globalreduce.load"; |
| } |
| |
| @Override |
| public Optional<LoadProfileEstimator> createLoadProfileEstimator(Configuration configuration) { |
| final Optional<LoadProfileEstimator> optEstimator = |
| FlinkExecutionOperator.super.createLoadProfileEstimator(configuration); |
| LoadProfileEstimators.nestUdfEstimator(optEstimator, this.reduceDescriptor, configuration); |
| return optEstimator; |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedInputChannels(int index) { |
| return Arrays.asList(DataSetChannel.DESCRIPTOR, DataSetChannel.DESCRIPTOR_MANY); |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedOutputChannels(int index) { |
| return Collections.singletonList(DataSetChannel.DESCRIPTOR); |
| } |
| |
| @Override |
| public boolean containsAction() { |
| return true; |
| } |
| } |