com.graphhopper.jsprit.examples.SolomonOpenExample Maven / Gradle / Ivy
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* Licensed to GraphHopper GmbH under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* GraphHopper GmbH 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 com.graphhopper.jsprit.examples;
import com.graphhopper.jsprit.analysis.toolbox.AlgorithmEventsRecorder;
import com.graphhopper.jsprit.analysis.toolbox.AlgorithmEventsViewer;
import com.graphhopper.jsprit.core.algorithm.VehicleRoutingAlgorithm;
import com.graphhopper.jsprit.core.algorithm.box.Jsprit;
import com.graphhopper.jsprit.core.algorithm.selector.SelectBest;
import com.graphhopper.jsprit.core.problem.VehicleRoutingProblem;
import com.graphhopper.jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import com.graphhopper.jsprit.core.reporting.SolutionPrinter;
import com.graphhopper.jsprit.io.problem.VrpXMLReader;
import com.graphhopper.jsprit.util.Examples;
import java.util.Collection;
public class SolomonOpenExample {
public static void main(String[] args) {
/*
* some preparation - create output folder
*/
Examples.createOutputFolder();
/*
* Build the problem.
*
* But define a problem-builder first.
*/
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
/*
* A solomonReader reads solomon-instance files, and stores the required information in the builder.
*/
new VrpXMLReader(vrpBuilder).read("input/deliveries_solomon_open_c101.xml");
/*
* Finally, the problem can be built. By default, transportCosts are crowFlyDistances (as usually used for vrp-instances).
*/
VehicleRoutingProblem vrp = vrpBuilder.build();
// new Plotter(vrp).plot("output/solomon_C101_open.png", "C101");
AlgorithmEventsRecorder eventsRecorder = new AlgorithmEventsRecorder(vrp, "output/events.dgs.gz");
eventsRecorder.setRecordingRange(0, 50);
/*
* Define the required vehicle-routing algorithms to solve the above problem.
*
* The algorithm can be defined and configured in an xml-file.
*/
// VehicleRoutingAlgorithm vra = new SchrimpfFactory().createAlgorithm(vrp);
// VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.readAndCreateAlgorithm(vrp, "input/algorithmConfig_fix.xml");
VehicleRoutingAlgorithm vra = Jsprit.Builder.newInstance(vrp).setProperty(Jsprit.Parameter.THREADS, "4")
.setProperty(Jsprit.Parameter.FAST_REGRET, "true")
.setProperty(Jsprit.Parameter.CONSTRUCTION, Jsprit.Construction.BEST_INSERTION.toString()).buildAlgorithm();
// vra.setPrematureBreak(100);
// vra.getAlgorithmListeners().addListener(new AlgorithmSearchProgressChartListener("output/sol_progress.png"));
vra.addListener(eventsRecorder);
vra.setMaxIterations(200);
/*
* Solve the problem.
*
*
*/
Collection solutions = vra.searchSolutions();
/*
* Retrieve best solution.
*/
VehicleRoutingProblemSolution solution = new SelectBest().selectSolution(solutions);
/*
* print solution
*/
SolutionPrinter.print(solution);
/*
* Plot solution.
*/
// SolutionPlotter.plotSolutionAsPNG(vrp, solution, "output/solomon_C101_open_solution.png","C101");
// new GraphStreamViewer(vrp, solution).setRenderDelay(100).labelWith(Label.ID).display();
AlgorithmEventsViewer viewer = new AlgorithmEventsViewer();
viewer.setRuinDelay(8);
viewer.setRecreationDelay(2);
viewer.display("output/events.dgs.gz");
}
}
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