| /* |
| * 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.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.wayang.basic.operators.CollectionSource; |
| 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 org.apache.wayang.java.channels.CollectionChannel; |
| |
| /** |
| * This is execution operator implements the {@link CollectionSource}. |
| */ |
| public class FlinkCollectionSource<Type> extends CollectionSource<Type> implements FlinkExecutionOperator{ |
| public FlinkCollectionSource(DataSetType<Type> type) { |
| this(null, type); |
| } |
| |
| public FlinkCollectionSource(Collection<Type> collection, DataSetType<Type> type) { |
| super(collection, type); |
| } |
| |
| /** |
| * Copies an instance (exclusive of broadcasts). |
| * |
| * @param that that should be copied |
| */ |
| public FlinkCollectionSource(CollectionSource<Type> that) { |
| super(that); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public Tuple<Collection<ExecutionLineageNode>, Collection<ChannelInstance>> evaluate( |
| ChannelInstance[] inputs, |
| ChannelInstance[] outputs, |
| FlinkExecutor flinkExecutor, |
| OptimizationContext.OperatorContext operatorContext) { |
| assert inputs.length == 0; |
| assert outputs.length == 1; |
| |
| final Collection<Type> collection; |
| if (this.collection != null) { |
| collection = this.collection; |
| } else { |
| collection = ((CollectionChannel.Instance)inputs[0]).provideCollection(); |
| } |
| |
| final DataSet<Type> datasetOutput = flinkExecutor.fee.fromCollection(collection); |
| ((DataSetChannel.Instance) outputs[0]).accept(datasetOutput, flinkExecutor); |
| |
| return ExecutionOperator.modelLazyExecution(inputs, outputs, operatorContext); |
| } |
| |
| @Override |
| public boolean containsAction() { |
| return false; |
| } |
| |
| |
| @Override |
| public String getLoadProfileEstimatorConfigurationKey() { |
| return "wayang.flink.collectionsource.load"; |
| } |
| |
| @Override |
| protected ExecutionOperator createCopy() { |
| return new FlinkCollectionSource<>(this.getCollection(), this.getType()); |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedInputChannels(int index) { |
| assert index <= this.getNumInputs() || (index == 0 && this.getNumInputs() == 0); |
| return Arrays.asList(CollectionChannel.DESCRIPTOR); |
| } |
| |
| @Override |
| public List<ChannelDescriptor> getSupportedOutputChannels(int index) { |
| assert index <= this.getNumOutputs() || (index == 0 && this.getNumOutputs() == 0); |
| return Arrays.asList(DataSetChannel.DESCRIPTOR, DataSetChannel.DESCRIPTOR_MANY); |
| } |
| |
| } |