| /* |
| * 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.MapFunction; |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.flink.api.java.functions.KeySelector; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| import org.apache.wayang.basic.operators.IntersectOperator; |
| import org.apache.wayang.core.function.TransformationDescriptor; |
| import org.apache.wayang.core.optimizer.OptimizationContext; |
| 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.List; |
| |
| /** |
| * Flink implementation of the {@link IntersectOperator}. |
| */ |
| public class FlinkIntersectOperator<Type> extends IntersectOperator<Type> implements FlinkExecutionOperator { |
| |
| |
| public FlinkIntersectOperator(DataSetType<Type> dataSetType) { |
| super(dataSetType); |
| } |
| |
| public FlinkIntersectOperator(Class<Type> typeClass) { |
| super(typeClass); |
| } |
| |
| /** |
| * Copies an instance (exclusive of broadcasts). |
| * |
| * @param that that should be copied |
| */ |
| public FlinkIntersectOperator(IntersectOperator<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 input0 = (DataSetChannel.Instance) inputs[0]; |
| final DataSetChannel.Instance input1 = (DataSetChannel.Instance) inputs[1]; |
| final DataSetChannel.Instance output = (DataSetChannel.Instance) outputs[0]; |
| |
| |
| final DataSet<Type> dataSetInput0 = input0.provideDataSet(); |
| final DataSet<Type> dataSetInput1 = input1.provideDataSet(); |
| |
| Class type_class = dataSetInput0.getType().getTypeClass(); |
| |
| TransformationDescriptor<Type, Type> descriptor = new TransformationDescriptor<Type, Type>( |
| type -> type, |
| type_class, |
| type_class |
| ); |
| |
| KeySelector<Type, Type> keySelector = flinkExecutor.compiler.compileKeySelector(descriptor); |
| |
| final DataSet<Type> dataSetOutput = dataSetInput0.join(dataSetInput1) |
| .where( |
| keySelector |
| ).equalTo( |
| keySelector |
| ).distinct() |
| .map( |
| new MapFunction<Tuple2<Type, Type>, Type>() { |
| @Override |
| public Type map(Tuple2<Type, Type> typeTypeTuple2) throws Exception { |
| return typeTypeTuple2.f0; |
| } |
| } |
| ); |
| |
| output.accept(dataSetOutput, flinkExecutor); |
| |
| return ExecutionOperator.modelLazyExecution(inputs, outputs, operatorContext); |
| } |
| |
| @Override |
| protected ExecutionOperator createCopy() { |
| return new FlinkIntersectOperator<>(this.getType()); |
| } |
| |
| @Override |
| public String getLoadProfileEstimatorConfigurationKey() { |
| return "wayang.flink.intersect.load"; |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedInputChannels(int index) { |
| assert index <= this.getNumInputs() || (index == 0 && this.getNumInputs() == 0); |
| return Arrays.asList(DataSetChannel.DESCRIPTOR, DataSetChannel.DESCRIPTOR_MANY); |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedOutputChannels(int index) { |
| assert index <= this.getNumOutputs() || (index == 0 && this.getNumOutputs() == 0); |
| return Arrays.asList(DataSetChannel.DESCRIPTOR, DataSetChannel.DESCRIPTOR_MANY); |
| } |
| |
| @Override |
| public boolean containsAction() { |
| return false; |
| } |
| } |