@Test
@Category(IntegrationTest.class)
public void
whenSolvingVRPNC1withDeliveriesWithJsprit_solutionsMustNoBeWorseThan5PercentOfBestKnownSolution() {
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
new VrpXMLReader(vrpBuilder).read("src/test/resources/vrpnc1-jsprit-with-deliveries.xml");
VehicleRoutingProblem vrp = vrpBuilder.build();
VehicleRoutingAlgorithm vra = Jsprit.createAlgorithm(vrp);
Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
assertEquals(530.0, Solutions.bestOf(solutions).getCost(), 50.0);
assertEquals(5, Solutions.bestOf(solutions).getRoutes().size());
}
@Test
public void itShouldSolveProblemWithIniSolutionExternallyCreated() {
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(10, 0)).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(0, 10)).build();
VehicleImpl vehicle =
VehicleImpl.Builder.newInstance("v1").setStartLocation(Location.newInstance(0, 0)).build();
VehicleRoutingProblem vrp =
VehicleRoutingProblem.Builder.newInstance()
.addJob(s1)
.addJob(s2)
.addVehicle(vehicle)
.build();
VehicleRoutingAlgorithm vra = Jsprit.createAlgorithm(vrp);
/*
create ini sol
*/
VehicleRoute route1 =
VehicleRoute.Builder.newInstance(vehicle)
.setJobActivityFactory(vrp.getJobActivityFactory())
.addService(s1)
.build();
vra.addInitialSolution(new VehicleRoutingProblemSolution(Arrays.asList(route1), 20.));
try {
vra.searchSolutions();
Assert.assertTrue(true);
} catch (Exception e) {
Assert.assertFalse(true);
}
}
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<VehicleRoutingProblemSolution> 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();
}
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 start-locations
*
* the first two do need to return to depot
*/
Builder vehicleBuilder1 = VehicleImpl.Builder.newInstance("vehicles@[10,10]");
vehicleBuilder1.setStartLocation(loc(Coordinate.newInstance(10, 10))).setReturnToDepot(false);
vehicleBuilder1.setType(vehicleType);
VehicleImpl vehicle1 = vehicleBuilder1.build();
Builder vehicleBuilder2 = VehicleImpl.Builder.newInstance("vehicles@[30,30]");
vehicleBuilder2.setStartLocation(loc(Coordinate.newInstance(30, 30))).setReturnToDepot(false);
vehicleBuilder2.setType(vehicleType);
VehicleImpl vehicle2 = vehicleBuilder2.build();
Builder vehicleBuilder3 = VehicleImpl.Builder.newInstance("vehicles@[10,30]");
vehicleBuilder3.setStartLocation(loc(Coordinate.newInstance(10, 30)));
vehicleBuilder3.setType(vehicleType);
VehicleImpl vehicle3 = vehicleBuilder3.build();
Builder vehicleBuilder4 = VehicleImpl.Builder.newInstance("vehicles@[30,10]");
vehicleBuilder4.setStartLocation(loc(Coordinate.newInstance(30, 10)));
vehicleBuilder4.setType(vehicleType);
VehicleImpl vehicle4 = vehicleBuilder4.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();
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
vrpBuilder.addVehicle(vehicle1).addVehicle(vehicle2).addVehicle(vehicle3).addVehicle(vehicle4);
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.setFleetSize(FleetSize.FINITE);
VehicleRoutingProblem problem = vrpBuilder.build();
/*
* get the algorithm out-of-the-box.
*/
VehicleRoutingAlgorithm algorithm = Jsprit.createAlgorithm(problem);
// algorithm.setMaxIterations(30000);
/*
* and search a solution
*/
Collection<VehicleRoutingProblemSolution> 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, Solutions.bestOf(solutions))
.labelWith(Label.ACTIVITY)
.setRenderDelay(100)
.setRenderShipments(true)
.display();
}