TomCools

// Prepare a custom icon, since default one is not "Christmas" enough.
const treeIcon = L.icon({iconUrl: 'tree-marker.png', iconSize: [20, 20]})

const map = L.map('map', {doubleClickZoom: false}).setView([66.5039, 25.7294], 4);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors',
}).addTo(map);

// Create a layer group,
const linesGroup = L.layerGroup().addTo(map);

TomCools

@Path("santa")
public class SantaResource {

    // Fields and constructor excluded

    @POST
    @Path("plan")
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public SantaPlan solve(List<Visit> visits) {

TomCools

public class SantaResource {

    private final SolverFactory<SantaPlan> solverFactory;

    // CDI Injected solverFactory
    public SantaResource(SolverFactory<SantaPlan> solverFactory) {
        this.solverFactory = solverFactory;
    }
    
    /**

TomCools

@PlanningSolution
public class SantaPlan {
    @PlanningEntityProperty
    private Santa santa;

    @ProblemFactCollectionProperty
    @ValueRangeProvider
    private List<Visit> visits;

    @PlanningScore

TomCools

public class SantaConstraintProvider implements ConstraintProvider {
    
    // NOTE: Normally you'd want to calculate a Distance Matrix before starting the solver.
    DrivingTimeCalculator drivingTimeCalculator = DrivingTimeCalculator.getInstance();
    public static final String MINIMIZE_TRAVEL_TIME = "minimizeTravelTime";

    @Override
    public Constraint[] defineConstraints(ConstraintFactory factory) {
        return new Constraint[]{
                minimizeTravelTime(factory)

TomCools

@PlanningEntity
public class Santa {

    private Location homeLocation;

    @PlanningListVariable
    private List<Visit> visits;

    // excluded constructor getter/setter
}