/******************************************************************************* * 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 . ******************************************************************************/ package jsprit.examples; import jsprit.analysis.toolbox.GraphStreamViewer; import jsprit.analysis.toolbox.GraphStreamViewer.Label; import jsprit.core.algorithm.VehicleRoutingAlgorithm; import jsprit.core.algorithm.VehicleRoutingAlgorithmBuilder; import jsprit.core.algorithm.state.StateManager; import jsprit.core.algorithm.termination.IterationWithoutImprovementTermination; import jsprit.core.problem.Location; import jsprit.core.problem.VehicleRoutingProblem; import jsprit.core.problem.VehicleRoutingProblem.FleetSize; import jsprit.core.problem.constraint.ConstraintManager; import jsprit.core.problem.constraint.HardRouteConstraint; import jsprit.core.problem.job.Shipment; import jsprit.core.problem.misc.JobInsertionContext; import jsprit.core.problem.solution.VehicleRoutingProblemSolution; import jsprit.core.problem.vehicle.VehicleImpl; import jsprit.core.problem.vehicle.VehicleImpl.Builder; import jsprit.core.problem.vehicle.VehicleType; import jsprit.core.problem.vehicle.VehicleTypeImpl; import jsprit.core.reporting.SolutionPrinter; import jsprit.core.util.Coordinate; import jsprit.core.util.Solutions; import jsprit.util.Examples; import java.util.Collection; public class EnRoutePickupAndDeliveryWithMultipleDepotsAndVehicleAccessConstraintAndSpecifiedVehicleEndLocationsExample { public static void main(String[] args) { /* * some preparation - create output folder */ Examples.createOutputFolder(); /* * get a vehicle type-builder and build a type with the typeId "vehicleType" and a capacity of 2 */ VehicleTypeImpl.Builder vehicleTypeBuilder = VehicleTypeImpl.Builder.newInstance("vehicleType").addCapacityDimension(0, 2); vehicleTypeBuilder.setCostPerDistance(1.0); VehicleType vehicleType = vehicleTypeBuilder.build(); /* * define two vehicles and their locations. * * this example employs two vehicles. one that has to return to its start-location (vehicle1) and one that has a different * end-location. * * play with these location to see which impact they have on customer-sequences. */ Builder vehicleBuilder1 = VehicleImpl.Builder.newInstance("v1"); vehicleBuilder1.setStartLocation(loc(Coordinate.newInstance(10, 10))); vehicleBuilder1.setType(vehicleType); VehicleImpl vehicle1 = vehicleBuilder1.build(); Builder vehicleBuilder2 = VehicleImpl.Builder.newInstance("v2"); vehicleBuilder2.setStartLocation(loc(Coordinate.newInstance(30, 30))).setEndLocation(loc(Coordinate.newInstance(30, 19))); vehicleBuilder2.setType(vehicleType); VehicleImpl vehicle2 = vehicleBuilder2.build(); /* * build shipments at the required locations, each with a capacity-demand of 1. * */ Shipment shipment1 = Shipment.Builder.newInstance("1").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 7))).setDeliveryLocation(loc(Coordinate.newInstance(6, 9))).build(); Shipment shipment2 = Shipment.Builder.newInstance("2").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 13))).setDeliveryLocation(loc(Coordinate.newInstance(6, 11))).build(); Shipment shipment3 = Shipment.Builder.newInstance("3").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 7))).setDeliveryLocation(loc(Coordinate.newInstance(14, 9))).build(); Shipment shipment4 = Shipment.Builder.newInstance("4").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 13))).setDeliveryLocation(loc(Coordinate.newInstance(14, 11))).build(); Shipment shipment5 = Shipment.Builder.newInstance("5").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(25, 27))).setDeliveryLocation(loc(Coordinate.newInstance(26, 29))).build(); Shipment shipment6 = Shipment.Builder.newInstance("6").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(25, 33))).setDeliveryLocation(loc(Coordinate.newInstance(26, 31))).build(); Shipment shipment7 = Shipment.Builder.newInstance("7").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(35, 27))).setDeliveryLocation(loc(Coordinate.newInstance(34, 29))).build(); Shipment shipment8 = Shipment.Builder.newInstance("8").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(35, 33))).setDeliveryLocation(loc(Coordinate.newInstance(34, 31))).build(); Shipment shipment9 = Shipment.Builder.newInstance("9").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 27))).setDeliveryLocation(loc(Coordinate.newInstance(6, 29))).build(); Shipment shipment10 = Shipment.Builder.newInstance("10").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 33))).setDeliveryLocation(loc(Coordinate.newInstance(6, 31))).build(); Shipment shipment11 = Shipment.Builder.newInstance("11").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 27))).setDeliveryLocation(loc(Coordinate.newInstance(14, 29))).build(); Shipment shipment12 = Shipment.Builder.newInstance("12").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 33))).setDeliveryLocation(loc(Coordinate.newInstance(14, 31))).build(); Shipment shipment13 = Shipment.Builder.newInstance("13").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(25, 7))).setDeliveryLocation(loc(Coordinate.newInstance(26, 9))).build(); Shipment shipment14 = Shipment.Builder.newInstance("14").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(25, 13))).setDeliveryLocation(loc(Coordinate.newInstance(26, 11))).build(); Shipment shipment15 = Shipment.Builder.newInstance("15").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(35, 7))).setDeliveryLocation(loc(Coordinate.newInstance(34, 9))).build(); Shipment shipment16 = Shipment.Builder.newInstance("16").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(35, 13))).setDeliveryLocation(loc(Coordinate.newInstance(34, 11))).build(); Shipment shipment17 = Shipment.Builder.newInstance("17").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 14))).setDeliveryLocation(loc(Coordinate.newInstance(6, 16))).build(); Shipment shipment18 = Shipment.Builder.newInstance("18").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(5, 20))).setDeliveryLocation(loc(Coordinate.newInstance(6, 18))).build(); Shipment shipment19 = Shipment.Builder.newInstance("19").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 14))).setDeliveryLocation(loc(Coordinate.newInstance(14, 16))).build(); Shipment shipment20 = Shipment.Builder.newInstance("20").addSizeDimension(0, 1).setPickupLocation(loc(Coordinate.newInstance(15, 20))).setDeliveryLocation(loc(Coordinate.newInstance(14, 18))).build(); VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance(); vrpBuilder.addVehicle(vehicle1).addVehicle(vehicle2); vrpBuilder.addJob(shipment1).addJob(shipment2).addJob(shipment3).addJob(shipment4); vrpBuilder.addJob(shipment5).addJob(shipment6).addJob(shipment7).addJob(shipment8); vrpBuilder.addJob(shipment9).addJob(shipment10).addJob(shipment11).addJob(shipment12); vrpBuilder.addJob(shipment13).addJob(shipment14).addJob(shipment15).addJob(shipment16); vrpBuilder.addJob(shipment17).addJob(shipment18).addJob(shipment19).addJob(shipment20); //you only have two vehicles vrpBuilder.setFleetSize(FleetSize.FINITE); //build the problem VehicleRoutingProblem problem = vrpBuilder.build(); /* * add a geographic constraint determining that vehicle1 cannot go to x>15 and vehicle2 cannot go to x<15 * * switch off the geoConstraints to see the impact of this constraint on routes, or just exchange v1 and v2 to reverse the geo-constraint. */ HardRouteConstraint geoClusterConstraint = new HardRouteConstraint() { @Override public boolean fulfilled(JobInsertionContext insertionContext) { Shipment shipment2insert = ((Shipment)insertionContext.getJob()); if(insertionContext.getNewVehicle().getId().equals("v1")){ if(shipment2insert.getPickupLocation().getCoordinate().getX() > 15. || shipment2insert.getDeliveryLocation().getCoordinate().getX() > 15.){ return false; } } if(insertionContext.getNewVehicle().getId().equals("v2")){ if(shipment2insert.getPickupLocation().getCoordinate().getX() < 15. || shipment2insert.getDeliveryLocation().getCoordinate().getX() < 15.){ return false; } } return true; } }; /* * get a sample algorithm. * * Note that you need to make sure to prohibit vehicle-switching by adding the insertion-tag false. * This way you make sure that no vehicle can take over a route that is employed by another. Allowing this might make sense when dealing with * a heterogeneous fleet and you want to employ a bigger vehicle on a still existing route. However, allowing it makes constraint-checking * bit more complicated and you cannot just add the above hard-constraint. Latter will be covered in another example. * */ VehicleRoutingAlgorithmBuilder vraBuilder = new VehicleRoutingAlgorithmBuilder(problem,"input/algorithmConfig_noVehicleSwitch.xml"); vraBuilder.addCoreConstraints(); vraBuilder.addDefaultCostCalculators(); StateManager stateManager = new StateManager(problem); ConstraintManager constraintManager = new ConstraintManager(problem,stateManager); constraintManager.addConstraint(geoClusterConstraint); vraBuilder.setStateAndConstraintManager(stateManager,constraintManager); VehicleRoutingAlgorithm algorithm = vraBuilder.build(); algorithm.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100)); // algorithm.setMaxIterations(30000); /* * and search a solution */ Collection solutions = algorithm.searchSolutions(); /* * get the best */ VehicleRoutingProblemSolution bestSolution = Solutions.bestOf(solutions); /* * write out problem and solution to xml-file */ // new VrpXMLWriter(problem, solutions).write("output/shipment-problem-with-solution.xml"); /* * print nRoutes and totalCosts of bestSolution */ SolutionPrinter.print(bestSolution); /* * plot problem without solution */ // Plotter problemPlotter = new Plotter(problem); // problemPlotter.plotShipments(true); // problemPlotter.plot("output/enRoutePickupAndDeliveryWithMultipleLocationsExample_problem.png", "en-route pickup and delivery"); // // /* // * plot problem with solution // */ // Plotter solutionPlotter = new Plotter(problem,Arrays.asList(Solutions.bestOf(solutions).getRoutes().iterator().next())); // solutionPlotter.plotShipments(true); // solutionPlotter.plot("output/enRoutePickupAndDeliveryWithMultipleLocationsExample_solution.png", "en-route pickup and delivery"); new GraphStreamViewer(problem).labelWith(Label.ID).setRenderDelay(100).setRenderShipments(true).display(); new GraphStreamViewer(problem,Solutions.bestOf(solutions)).labelWith(Label.ACTIVITY).setRenderDelay(100).setRenderShipments(true).display(); } private static Location loc(Coordinate coordinate) { return Location.Builder.newInstance().setCoordinate(coordinate).build(); } }