trans/graphhopper-jsprit
1
0
Fork 0
mirror of https://github.com/graphhopper/jsprit.git synced 2020-01-24 07:45:05 +01:00
Code Issues Releases Wiki Activity

incorporate priorities into search - #242

Browse source
This commit is contained in:
oblonski 2016-05-24 22:14:03 +02:00
parent 6cf2ac2d56
commit af2e9b0a32
12 changed files with 288 additions and 74 deletions
Download patch file Download diff file Expand all files Collapse all files

112
jsprit-examples/src/main/java/com/graphhopper/jsprit/examples/SimpleExampleWithPriorities.java Normal file
View file

@ -0,0 +1,112 @@
/*******************************************************************************
* Copyright (C) 2014 Stefan Schroeder
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package com.graphhopper.jsprit.examples;
import com.graphhopper.jsprit.analysis.toolbox.GraphStreamViewer;
import com.graphhopper.jsprit.analysis.toolbox.GraphStreamViewer.Label;
import com.graphhopper.jsprit.core.algorithm.VehicleRoutingAlgorithm;
import com.graphhopper.jsprit.core.algorithm.box.Jsprit;
import com.graphhopper.jsprit.core.problem.Location;
import com.graphhopper.jsprit.core.problem.VehicleRoutingProblem;
import com.graphhopper.jsprit.core.problem.io.VrpXMLWriter;
import com.graphhopper.jsprit.core.problem.job.Service;
import com.graphhopper.jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import com.graphhopper.jsprit.core.problem.vehicle.VehicleImpl;
import com.graphhopper.jsprit.core.problem.vehicle.VehicleImpl.Builder;
import com.graphhopper.jsprit.core.problem.vehicle.VehicleType;
import com.graphhopper.jsprit.core.problem.vehicle.VehicleTypeImpl;
import com.graphhopper.jsprit.core.reporting.SolutionPrinter;
import com.graphhopper.jsprit.core.util.Solutions;
import java.io.File;
import java.util.Collection;
public class SimpleExampleWithPriorities {
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");
}
/*
* get a vehicle type-builder and build a type with the typeId "vehicleType" and one capacity dimension, i.e. weight, and capacity dimension value of 2
*/
final int WEIGHT_INDEX = 0;
VehicleTypeImpl.Builder vehicleTypeBuilder = VehicleTypeImpl.Builder.newInstance("vehicleType").addCapacityDimension(WEIGHT_INDEX, 2);
VehicleType vehicleType = vehicleTypeBuilder.build();
/*
* get a vehicle-builder and build a vehicle located at (10,10) with type "vehicleType"
*/
Builder vehicleBuilder = Builder.newInstance("vehicle");
vehicleBuilder.setStartLocation(Location.newInstance(10, 10));
vehicleBuilder.setType(vehicleType);
VehicleImpl vehicle = vehicleBuilder.build();
/*
* build services at the required locations, each with a capacity-demand of 1.
*/
Service service1 = Service.Builder.newInstance("1").setPriority(1).addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(5, 7)).build();
Service service2 = Service.Builder.newInstance("2").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(5, 13)).build();
Service service3 = Service.Builder.newInstance("3").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(15, 7)).build();
Service service4 = Service.Builder.newInstance("4").setPriority(1).addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(15, 13)).build();
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
vrpBuilder.addVehicle(vehicle);
vrpBuilder.addJob(service1).addJob(service2).addJob(service3).addJob(service4).setFleetSize(VehicleRoutingProblem.FleetSize.FINITE);
VehicleRoutingProblem problem = vrpBuilder.build();
/*
* get the algorithm out-of-the-box.
*/
VehicleRoutingAlgorithm algorithm = Jsprit.createAlgorithm(problem);
/*
* and search a solution
*/
Collection<VehicleRoutingProblemSolution> solutions = algorithm.searchSolutions();
/*
* get the best
*/
VehicleRoutingProblemSolution bestSolution = Solutions.bestOf(solutions);
new VrpXMLWriter(problem, solutions).write("output/problem-with-solution.xml");
SolutionPrinter.print(problem, bestSolution, SolutionPrinter.Print.VERBOSE);
/*
* plot
*/
// SolutionPlotter.plotSolutionAsPNG(problem, bestSolution, "output/solution.png", "solution");
new GraphStreamViewer(problem, bestSolution).labelWith(Label.ID).setRenderDelay(200).display();
}
}