| /* |
| * 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.flink.optimizer.operators; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.flink.api.common.operators.base.GroupReduceOperatorBase; |
| import org.apache.flink.api.common.operators.util.FieldSet; |
| import org.apache.flink.optimizer.dag.GroupReduceNode; |
| import org.apache.flink.optimizer.dag.SingleInputNode; |
| import org.apache.flink.optimizer.dataproperties.GlobalProperties; |
| import org.apache.flink.optimizer.dataproperties.LocalProperties; |
| import org.apache.flink.optimizer.dataproperties.PartitioningProperty; |
| import org.apache.flink.optimizer.dataproperties.RequestedGlobalProperties; |
| import org.apache.flink.optimizer.dataproperties.RequestedLocalProperties; |
| import org.apache.flink.optimizer.plan.Channel; |
| import org.apache.flink.optimizer.plan.SingleInputPlanNode; |
| import org.apache.flink.runtime.operators.DriverStrategy; |
| |
| public final class PartialGroupProperties extends OperatorDescriptorSingle { |
| |
| public PartialGroupProperties(FieldSet keys) { |
| super(keys); |
| } |
| |
| @Override |
| public DriverStrategy getStrategy() { |
| return DriverStrategy.SORTED_GROUP_COMBINE; |
| } |
| |
| @Override |
| public SingleInputPlanNode instantiate(Channel in, SingleInputNode node) { |
| // create in input node for combine with the same parallelism as input node |
| GroupReduceNode combinerNode = new GroupReduceNode((GroupReduceOperatorBase<?, ?, ?>) node.getOperator()); |
| combinerNode.setParallelism(in.getSource().getParallelism()); |
| |
| SingleInputPlanNode combiner = new SingleInputPlanNode(combinerNode, "Combine("+node.getOperator().getName()+")", in, |
| DriverStrategy.SORTED_GROUP_COMBINE); |
| // sorting key info |
| combiner.setDriverKeyInfo(in.getLocalStrategyKeys(), in.getLocalStrategySortOrder(), 0); |
| // set grouping comparator key info |
| combiner.setDriverKeyInfo(this.keyList, 1); |
| |
| return combiner; |
| } |
| |
| @Override |
| protected List<RequestedGlobalProperties> createPossibleGlobalProperties() { |
| return Collections.singletonList(new RequestedGlobalProperties()); |
| } |
| |
| @Override |
| protected List<RequestedLocalProperties> createPossibleLocalProperties() { |
| RequestedLocalProperties props = new RequestedLocalProperties(); |
| props.setGroupedFields(this.keys); |
| return Collections.singletonList(props); |
| } |
| |
| @Override |
| public GlobalProperties computeGlobalProperties(GlobalProperties gProps) { |
| if (gProps.getUniqueFieldCombination() != null && gProps.getUniqueFieldCombination().size() > 0 && |
| gProps.getPartitioning() == PartitioningProperty.RANDOM_PARTITIONED) |
| { |
| gProps.setAnyPartitioning(gProps.getUniqueFieldCombination().iterator().next().toFieldList()); |
| } |
| gProps.clearUniqueFieldCombinations(); |
| return gProps; |
| } |
| |
| @Override |
| public LocalProperties computeLocalProperties(LocalProperties lProps) { |
| return lProps.clearUniqueFieldSets(); |
| } |
| } |