| /* |
| * 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.core.plan.wayangplan; |
| |
| |
| import java.util.Collection; |
| import org.apache.wayang.commons.util.profiledb.model.Measurement; |
| import org.apache.wayang.commons.util.profiledb.model.Type; |
| |
| /** |
| * This class collects metrics for {@link WayangPlan}s. |
| */ |
| @Type("planmetrics") |
| public class PlanMetrics extends Measurement { |
| |
| /** |
| * Creates a new instance and collects metrics from the given {@link WayangPlan}. |
| * |
| * @param wayangPlan the {@link WayangPlan} |
| * @param id for the new instance |
| * @return the new instance |
| */ |
| public static PlanMetrics createFor(WayangPlan wayangPlan, String id) { |
| PlanMetrics planMetrics = new PlanMetrics(id); |
| planMetrics.collectFrom(wayangPlan); |
| return planMetrics; |
| } |
| |
| /** |
| * Number of virtual {@link Operator}s, {@link ExecutionOperator}s, and {@link OperatorAlternative}s. |
| */ |
| private int numVirtualOperators, numExecutionOperators, numAlternatives; |
| |
| /** |
| * Number of possible combinations of {@link ExecutionOperator}s in the {@link WayangPlan}. |
| */ |
| private long numCombinations; |
| |
| /** |
| * Serialization constructor. |
| */ |
| protected PlanMetrics() { |
| } |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param id the ID for the new instance |
| */ |
| private PlanMetrics(String id) { |
| super(id); |
| } |
| |
| /** |
| * Collects metrics. |
| * |
| * @param wayangPlan on which the metrics should be collected |
| */ |
| private void collectFrom(WayangPlan wayangPlan) { |
| final Collection<Operator> operators = PlanTraversal.upstream().traverse(wayangPlan.getSinks()).getTraversedNodes(); |
| this.numCombinations = this.collectFrom(operators); |
| } |
| |
| /** |
| * Collects metrics. |
| * |
| * @param operators from that the metrics should be collected |
| * @return the number of {@link ExecutionOperator} combinations among the {@code operators} |
| */ |
| private long collectFrom(Collection<Operator> operators) { |
| long numCombinations = 1L; |
| for (Operator operator : operators) { |
| if (operator.isElementary()) { |
| if (operator.isExecutionOperator()) { |
| this.numExecutionOperators++; |
| } else { |
| this.numVirtualOperators++; |
| numCombinations = 0; |
| } |
| |
| } else { |
| if (operator.isAlternative()) { |
| this.numAlternatives++; |
| long numLocalCombinations = 0; |
| for (OperatorAlternative.Alternative alternative : ((OperatorAlternative) operator).getAlternatives()) { |
| numLocalCombinations += this.collectFrom(alternative); |
| } |
| numCombinations *= numLocalCombinations; |
| } else if (operator.isSubplan()) { |
| numCombinations *= this.collectFrom((Subplan) operator); |
| } |
| } |
| } |
| return numCombinations; |
| } |
| |
| /** |
| * Collects metrics. |
| * |
| * @param operatorContainer among whose {@link Operator}s metrics should be collected |
| * @return the number of combinations of {@link ExecutionOperator}s within the {@code operatorContainer} |
| */ |
| private long collectFrom(OperatorContainer operatorContainer) { |
| return this.collectFrom(operatorContainer.getContainedOperators()); |
| } |
| |
| /** |
| * Provide the number of virtual {@link Operator}s in the {@link WayangPlan}. |
| * |
| * @return the number of virtual {@link Operator}s |
| */ |
| public int getNumVirtualOperators() { |
| return this.numVirtualOperators; |
| } |
| |
| /** |
| * Provide the number of {@link ExecutionOperator}s in the {@link WayangPlan}. |
| * |
| * @return the number of {@link ExecutionOperator}s |
| */ |
| public int getNumExecutionOperators() { |
| return this.numExecutionOperators; |
| } |
| |
| /** |
| * Provide the number of {@link OperatorAlternative}s in the {@link WayangPlan}. |
| * |
| * @return the number of {@link OperatorAlternative}s |
| */ |
| public int getNumAlternatives() { |
| return this.numAlternatives; |
| } |
| |
| public long getNumCombinations() { |
| return numCombinations; |
| } |
| } |