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/*
* 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.drill.exec.physical;
import java.io.IOException;
import java.util.List;
import org.apache.drill.common.graph.Graph;
import org.apache.drill.common.graph.GraphAlgos;
import org.apache.drill.common.logical.PlanProperties;
import org.apache.drill.exec.physical.base.Leaf;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.Root;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import org.apache.drill.shaded.guava.com.google.common.collect.Lists;
@JsonPropertyOrder({ "head", "graph" })
public class PhysicalPlan {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PhysicalPlan.class);
PlanProperties properties;
Graph<PhysicalOperator, Root, Leaf> graph;
@JsonCreator
public PhysicalPlan(@JsonProperty("head") PlanProperties properties,
@JsonProperty("graph") List<PhysicalOperator> operators) {
this.properties = properties;
this.graph = Graph.newGraph(operators, Root.class, Leaf.class);
}
@JsonProperty("graph")
public List<PhysicalOperator> getSortedOperators(){
// reverse the list so that nested references are flattened rather than nested.
return getSortedOperators(true);
}
public List<PhysicalOperator> getSortedOperators(boolean reverse){
List<PhysicalOperator> list = GraphAlgos.TopoSorter.sort(graph);
if(reverse){
return Lists.reverse(list);
}else{
return list;
}
}
@JsonProperty("head")
public PlanProperties getProperties() {
return properties;
}
/** Parses a physical plan. */
public static PhysicalPlan parse(ObjectReader reader, String planString) {
try {
PhysicalPlan plan = reader.readValue(planString);
return plan;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/** Converts a physical plan to a string. (Opposite of {@link #parse}.) */
public String unparse(ObjectWriter writer) {
try {
return writer.writeValueAsString(this);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public double totalCost() {
double totalCost = 0;
for (final PhysicalOperator ops : getSortedOperators()) {
totalCost += ops.getCost();
}
return totalCost;
}
@JsonIgnore
public Graph<PhysicalOperator, Root, Leaf> graph() {
return graph;
}
}
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