com.graphhopper.jsprit.examples.SolomonExampleWithSpecifiedVehicleEndLocations 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.AlgorithmSearchProgressChartListener;
import com.graphhopper.jsprit.analysis.toolbox.GraphStreamViewer;
import com.graphhopper.jsprit.analysis.toolbox.GraphStreamViewer.Label;
import com.graphhopper.jsprit.analysis.toolbox.Plotter;
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 java.io.File;
import java.util.Collection;


public class SolomonExampleWithSpecifiedVehicleEndLocations {

    public static void main(String[] args) {
        /*
         * some preparation - create output folder
		 */
        File dir = new File("output");
        // if the directory does not exist, create it
        if (!dir.exists()) {
            System.out.println("creating directory ./output");
            boolean result = dir.mkdir();
            if (result) System.out.println("./output created");
        }

		/*
         * 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_specifiedVehicleEndLocations_c101.xml");

		/*
         * Finally, the problem can be built. By default, transportCosts are crowFlyDistances (as usually used for vrp-instances).
		 */
        VehicleRoutingProblem vrp = vrpBuilder.build();

        Plotter pblmPlotter = new Plotter(vrp);
        pblmPlotter.plot("output/solomon_C101_specifiedVehicleEndLocations.png", "C101");

		/*
         * 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 = Jsprit.createAlgorithm(vrp);
        vra.setMaxIterations(20000);
//		vra.setPrematureBreak(100);
        vra.getAlgorithmListeners().addListener(new AlgorithmSearchProgressChartListener("output/sol_progress.png"));
        /*
         * 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_specifiedVehicleEndLocations_solution.png","C101");
        Plotter solPlotter = new Plotter(vrp, solution);
        solPlotter.plot("output/solomon_C101_specifiedVehicleEndLocations_solution.png", "C101");


        new GraphStreamViewer(vrp, solution).setRenderDelay(50).labelWith(Label.ID).display();


    }

}