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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.compiler.operators;
import java.util.Collections;
import java.util.List;
import org.apache.flink.api.common.operators.util.FieldSet;
import org.apache.flink.compiler.costs.Costs;
import org.apache.flink.compiler.dag.ReduceNode;
import org.apache.flink.compiler.dag.SingleInputNode;
import org.apache.flink.compiler.dataproperties.GlobalProperties;
import org.apache.flink.compiler.dataproperties.LocalProperties;
import org.apache.flink.compiler.dataproperties.PartitioningProperty;
import org.apache.flink.compiler.dataproperties.RequestedGlobalProperties;
import org.apache.flink.compiler.dataproperties.RequestedLocalProperties;
import org.apache.flink.compiler.plan.Channel;
import org.apache.flink.compiler.plan.SingleInputPlanNode;
import org.apache.flink.runtime.operators.DriverStrategy;
import org.apache.flink.runtime.operators.shipping.ShipStrategyType;
import org.apache.flink.runtime.operators.util.LocalStrategy;
public final class ReduceProperties extends OperatorDescriptorSingle {
public ReduceProperties(FieldSet keys) {
super(keys);
}
@Override
public DriverStrategy getStrategy() {
return DriverStrategy.SORTED_REDUCE;
}
@Override
public SingleInputPlanNode instantiate(Channel in, SingleInputNode node) {
if (in.getShipStrategy() == ShipStrategyType.FORWARD ||
(node.getBroadcastConnections() != null && !node.getBroadcastConnections().isEmpty()))
{
return new SingleInputPlanNode(node, "Reduce ("+node.getPactContract().getName()+")", in, DriverStrategy.SORTED_REDUCE, this.keyList);
}
else {
// non forward case. all local properties are killed anyways, so we can safely plug in a combiner
Channel toCombiner = new Channel(in.getSource());
toCombiner.setShipStrategy(ShipStrategyType.FORWARD);
// create an input node for combine with same DOP as input node
ReduceNode combinerNode = ((ReduceNode) node).getCombinerUtilityNode();
combinerNode.setDegreeOfParallelism(in.getSource().getDegreeOfParallelism());
SingleInputPlanNode combiner = new SingleInputPlanNode(combinerNode, "Combine ("+node.getPactContract().getName()+")", toCombiner, DriverStrategy.SORTED_PARTIAL_REDUCE, this.keyList);
combiner.setCosts(new Costs(0, 0));
combiner.initProperties(toCombiner.getGlobalProperties(), toCombiner.getLocalProperties());
Channel toReducer = new Channel(combiner);
toReducer.setShipStrategy(in.getShipStrategy(), in.getShipStrategyKeys(), in.getShipStrategySortOrder());
toReducer.setLocalStrategy(LocalStrategy.SORT, in.getLocalStrategyKeys(), in.getLocalStrategySortOrder());
return new SingleInputPlanNode(node, "Reduce("+node.getPactContract().getName()+")", toReducer, DriverStrategy.SORTED_REDUCE, this.keyList);
}
}
@Override
protected List<RequestedGlobalProperties> createPossibleGlobalProperties() {
RequestedGlobalProperties props = new RequestedGlobalProperties();
props.setAnyPartitioning(this.keys);
return Collections.singletonList(props);
}
@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)
{
gProps.setAnyPartitioning(gProps.getUniqueFieldCombination().iterator().next().toFieldList());
}
gProps.clearUniqueFieldCombinations();
return gProps;
}
@Override
public LocalProperties computeLocalProperties(LocalProperties lProps) {
return lProps.clearUniqueFieldSets();
}
}