| /* |
| * 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 java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.flink.api.common.functions.CoGroupFunction; |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.flink.api.java.functions.KeySelector; |
| import org.apache.flink.util.Collector; |
| import org.apache.wayang.basic.data.Tuple2; |
| import org.apache.wayang.basic.operators.CoGroupOperator; |
| import org.apache.wayang.core.function.FunctionDescriptor; |
| 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.ReflectionUtils; |
| import org.apache.wayang.core.util.Tuple; |
| import org.apache.wayang.flink.channels.DataSetChannel; |
| import org.apache.wayang.flink.compiler.FunctionCompiler; |
| import org.apache.wayang.flink.execution.FlinkExecutor; |
| |
| /** |
| * Flink implementation of the {@link CoGroupOperator}. |
| */ |
| public class FlinkCoGroupOperator<InputType0, InputType1, TypeKey> |
| extends CoGroupOperator<InputType0, InputType1, TypeKey> |
| implements FlinkExecutionOperator { |
| /** |
| * @see CoGroupOperator#CoGroupOperator(FunctionDescriptor.SerializableFunction, FunctionDescriptor.SerializableFunction, Class, Class, Class) |
| */ |
| public FlinkCoGroupOperator(FunctionDescriptor.SerializableFunction<InputType0, TypeKey> keyExtractor0, |
| FunctionDescriptor.SerializableFunction<InputType1, TypeKey> keyExtractor1, |
| Class<InputType0> input0Class, |
| Class<InputType1> input1Class, |
| Class<TypeKey> keyClass) { |
| super(keyExtractor0, keyExtractor1, input0Class, input1Class, keyClass); |
| } |
| |
| /** |
| * @see CoGroupOperator#CoGroupOperator(TransformationDescriptor, TransformationDescriptor) |
| */ |
| public FlinkCoGroupOperator(TransformationDescriptor<InputType0, TypeKey> keyDescriptor0, |
| TransformationDescriptor<InputType1, TypeKey> keyDescriptor1) { |
| super(keyDescriptor0, keyDescriptor1); |
| } |
| |
| /** |
| * @see CoGroupOperator#CoGroupOperator(TransformationDescriptor, TransformationDescriptor, DataSetType, DataSetType) |
| */ |
| public FlinkCoGroupOperator(TransformationDescriptor<InputType0, TypeKey> keyDescriptor0, |
| TransformationDescriptor<InputType1, TypeKey> keyDescriptor1, |
| DataSetType<InputType0> inputType0, |
| DataSetType<InputType1> inputType1) { |
| super(keyDescriptor0, keyDescriptor1, inputType0, inputType1); |
| } |
| |
| /** |
| * @see CoGroupOperator#CoGroupOperator(CoGroupOperator) |
| */ |
| public FlinkCoGroupOperator(CoGroupOperator<InputType0, InputType1, TypeKey> 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<InputType0> datasetInput0 = input0.provideDataSet(); |
| final DataSet<InputType1> datasetInput1 = input1.provideDataSet(); |
| |
| FunctionCompiler compiler = flinkExecutor.getCompiler(); |
| |
| KeySelector<InputType0, TypeKey> function0 = compiler.compileKeySelector(this.keyDescriptor0); |
| KeySelector<InputType1, TypeKey> function1 = compiler.compileKeySelector(this.keyDescriptor1); |
| |
| |
| final DataSet<Tuple2<Iterable<InputType0>, Iterable<InputType1>>> datasetOutput = datasetInput0.coGroup(datasetInput1) |
| .where( |
| function0 |
| ).equalTo( |
| function1 |
| ).with( |
| new CoGroupFunction<InputType0, InputType1, Tuple2<Iterable<InputType0>, Iterable<InputType1>>>() { |
| @Override |
| public void coGroup ( |
| Iterable<InputType0> iterable, |
| Iterable<InputType1> iterable1, |
| Collector< Tuple2<Iterable<InputType0>, Iterable<InputType1>> > collector |
| ){ |
| List<InputType0> list0 = new ArrayList<>(); |
| List<InputType1> list1 = new ArrayList<>(); |
| iterable.forEach(list0::add); |
| iterable1.forEach(list1::add); |
| collector.collect( new Tuple2<>(list0, list1)); |
| } |
| }).returns(ReflectionUtils.specify(Tuple2.class)); |
| |
| output.accept(datasetOutput, flinkExecutor); |
| |
| return ExecutionOperator.modelLazyExecution(inputs, outputs, operatorContext); |
| } |
| |
| @Override |
| protected ExecutionOperator createCopy() { |
| return new FlinkCoGroupOperator<>(this); |
| } |
| |
| public String getLoadProfileEstimatorConfigurationTypeKey() { |
| return "wayang.flink.cogroup.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 Collections.singletonList(DataSetChannel.DESCRIPTOR); |
| } |
| |
| @Override |
| public boolean containsAction() { |
| return false; |
| } |
| |
| } |