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add job and activity dependency example
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oblonski
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/*******************************************************************************
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* Copyright (C) 2014 Stefan Schroeder
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3.0 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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package jsprit.examples;
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import jsprit.analysis.toolbox.GraphStreamViewer;
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import jsprit.core.algorithm.VehicleRoutingAlgorithm;
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import jsprit.core.algorithm.VehicleRoutingAlgorithmBuilder;
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import jsprit.core.algorithm.state.StateId;
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import jsprit.core.algorithm.state.StateManager;
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import jsprit.core.algorithm.state.StateUpdater;
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import jsprit.core.problem.VehicleRoutingProblem;
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import jsprit.core.problem.constraint.ConstraintManager;
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import jsprit.core.problem.constraint.HardActivityConstraint;
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import jsprit.core.problem.constraint.HardRouteConstraint;
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import jsprit.core.problem.job.Service;
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import jsprit.core.problem.misc.JobInsertionContext;
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import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
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import jsprit.core.problem.solution.route.VehicleRoute;
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import jsprit.core.problem.solution.route.activity.ActivityVisitor;
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import jsprit.core.problem.solution.route.activity.TourActivity;
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import jsprit.core.problem.vehicle.VehicleImpl;
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import jsprit.core.reporting.SolutionPrinter;
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import jsprit.core.util.Coordinate;
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import jsprit.core.util.Solutions;
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import java.util.Collection;
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/**
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* Illustrates dependencies between jobs.
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*
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* The hard requirement here is that three jobs with name "get key", "use key" and "deliver key" need to
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* be not only in loose sequence in one particular route but also one after another (without any other activities
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* between them).
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*
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*/
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public class JobAndActivityDependenciesExample {
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static class KeyStatusUpdater implements StateUpdater, ActivityVisitor {
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StateManager stateManager;
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StateId keyPickedStateId;
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StateId keyUsedStateId;
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private StateId keyDeliveredStateId;
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private VehicleRoute route;
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KeyStatusUpdater(StateManager stateManager, StateId keyPickedStateId, StateId keyUsedStateId, StateId keyDeliveredStateId) {
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this.stateManager = stateManager;
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this.keyPickedStateId = keyPickedStateId;
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this.keyUsedStateId = keyUsedStateId;
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this.keyDeliveredStateId = keyDeliveredStateId;
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}
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@Override
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public void begin(VehicleRoute route) {
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this.route = route;
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}
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@Override
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public void visit(TourActivity activity) {
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if(((TourActivity.JobActivity)activity).getJob().getName().equals("use key")) {
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stateManager.putProblemState(keyUsedStateId, VehicleRoute.class, route);
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}
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else if(((TourActivity.JobActivity)activity).getJob().getName().equals("get key")) {
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stateManager.putProblemState(keyPickedStateId, VehicleRoute.class, route);
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}
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else if(((TourActivity.JobActivity)activity).getJob().getName().equals("deliver key")) {
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stateManager.putProblemState(keyDeliveredStateId, VehicleRoute.class, route);
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}
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}
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@Override
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public void finish() {}
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}
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static class GetUseAndDeliverHardRouteContraint implements HardRouteConstraint {
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StateManager stateManager;
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StateId keyPickedStateId;
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StateId keyUsedStateId;
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StateId keyDeliveredStateId;
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public GetUseAndDeliverHardRouteContraint(StateManager stateManager, StateId keyPickedStateId, StateId keyUsedStateId, StateId keyDeliveredStateId) {
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this.stateManager = stateManager;
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this.keyPickedStateId = keyPickedStateId;
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this.keyUsedStateId = keyUsedStateId;
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this.keyDeliveredStateId = keyDeliveredStateId;
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}
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@Override
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public boolean fulfilled(JobInsertionContext iFacts) {
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if(iFacts.getJob().getName().equals("get key") || iFacts.getJob().getName().equals("use key")
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|| iFacts.getJob().getName().equals("deliver key")){
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VehicleRoute routeOfPickupKey = stateManager.getProblemState(keyPickedStateId, VehicleRoute.class);
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VehicleRoute routeOfUseKey = stateManager.getProblemState(keyUsedStateId, VehicleRoute.class);
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VehicleRoute routeOfDeliverKey = stateManager.getProblemState(keyDeliveredStateId, VehicleRoute.class);
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if( routeOfPickupKey != null ){
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if( routeOfPickupKey != iFacts.getRoute() ) return false;
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}
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if( routeOfUseKey != null ){
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if( routeOfUseKey != iFacts.getRoute() ) return false;
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}
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if( routeOfDeliverKey != null ) {
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if( routeOfDeliverKey != iFacts.getRoute() ) return false;
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}
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}
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return true;
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}
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}
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static class GetUseAndDeliverKeySimpleHardActivityConstraint implements HardActivityConstraint {
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StateManager stateManager;
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StateId keyPickedStateId;
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StateId keyUsedStateId;
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StateId keyDeliveredStateId;
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GetUseAndDeliverKeySimpleHardActivityConstraint(StateManager stateManager, StateId keyPickedStateId, StateId keyUsedStateId, StateId keyDeliveredStateId) {
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this.stateManager = stateManager;
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this.keyPickedStateId = keyPickedStateId;
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this.keyUsedStateId = keyUsedStateId;
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this.keyDeliveredStateId = keyDeliveredStateId;
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}
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@Override
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public ConstraintsStatus fulfilled(JobInsertionContext iFacts, TourActivity prevAct, TourActivity newAct, TourActivity nextAct, double prevActDepTime) {
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VehicleRoute routeOfPickupKey = stateManager.getProblemState(keyPickedStateId, VehicleRoute.class);
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VehicleRoute routeOfUseKey = stateManager.getProblemState(keyUsedStateId, VehicleRoute.class);
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VehicleRoute routeOfDeliverKey = stateManager.getProblemState(keyDeliveredStateId, VehicleRoute.class);
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if( !isPickupKey(newAct) && !isUseKey(newAct) && !isDeliverKey(newAct) ){
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if(isPickupKey(prevAct) && isUseKey(nextAct)) return ConstraintsStatus.NOT_FULFILLED;
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if(isPickupKey(prevAct) && isDeliverKey(nextAct)) return ConstraintsStatus.NOT_FULFILLED;
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if(isUseKey(prevAct) && isDeliverKey(nextAct)) return ConstraintsStatus.NOT_FULFILLED;
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}
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if( isPickupKey(newAct) ) {
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if ( routeOfUseKey != null){
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if ( !isUseKey(nextAct) ) return ConstraintsStatus.NOT_FULFILLED;
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}
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if ( routeOfDeliverKey != null ){
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if ( !isDeliverKey( nextAct )) return ConstraintsStatus.NOT_FULFILLED;
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}
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return ConstraintsStatus.FULFILLED;
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}
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if( isUseKey(newAct) ) {
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if ( routeOfPickupKey != null ) {
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if ( !isPickupKey(prevAct) ) return ConstraintsStatus.NOT_FULFILLED;
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}
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if ( routeOfDeliverKey != null ) {
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if ( !isDeliverKey(nextAct) ) return ConstraintsStatus.NOT_FULFILLED;
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}
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return ConstraintsStatus.FULFILLED;
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}
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if( isDeliverKey(newAct) ){
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if( routeOfUseKey != null ) {
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if ( !isUseKey(prevAct) ) return ConstraintsStatus.NOT_FULFILLED;
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}
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}
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return ConstraintsStatus.FULFILLED;
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}
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private boolean isPickupKey(TourActivity act) {
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if(!(act instanceof TourActivity.JobActivity)) return false;
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return ((TourActivity.JobActivity)act).getJob().getName().equals("get key");
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}
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private boolean isUseKey(TourActivity act) {
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if(!(act instanceof TourActivity.JobActivity)) return false;
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return ((TourActivity.JobActivity)act).getJob().getName().equals("use key");
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}
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private boolean isDeliverKey(TourActivity act) {
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if(!(act instanceof TourActivity.JobActivity)) return false;
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return ((TourActivity.JobActivity)act).getJob().getName().equals("deliver key");
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}
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}
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public static void main(String[] args) {
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VehicleImpl driver1 = VehicleImpl.Builder.newInstance("driver1")
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.addSkill("driver1")
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.setStartLocationCoordinate(Coordinate.newInstance(0, 0)).setReturnToDepot(false).build();
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VehicleImpl driver3 = VehicleImpl.Builder.newInstance("driver3")
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.addSkill("driver3")
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.setStartLocationCoordinate(Coordinate.newInstance(-3, 5)).setReturnToDepot(true).build();
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Service s1 = Service.Builder.newInstance("s1")
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.addRequiredSkill("driver1")
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.setName("install new device")
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.setCoord(Coordinate.newInstance(2, 2)).build();
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Service s2 = Service.Builder.newInstance("s2")
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.addRequiredSkill("driver3")
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.setName("deliver key")
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.setCoord(Coordinate.newInstance(2, 4)).build();
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Service s3 = Service.Builder.newInstance("s3")
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.addRequiredSkill("driver1")
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.setName("repair heater")
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.setCoord(Coordinate.newInstance(-2, 2)).build();
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Service s4 = Service.Builder.newInstance("s4")
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.addRequiredSkill("driver3")
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.setName("get key")
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.setCoord(Coordinate.newInstance(-2.3, 4)).build();
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Service s5 = Service.Builder.newInstance("s5")
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.addRequiredSkill("driver1")
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.setName("cleaning")
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.setCoord(Coordinate.newInstance(1, 5)).build();
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Service s6 = Service.Builder.newInstance("s6")
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.addRequiredSkill("driver3")
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.setName("use key")
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.setCoord(Coordinate.newInstance(-2, 3)).build();
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Service s7 = Service.Builder.newInstance("s7")
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.addRequiredSkill("driver3")
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.setName("maintenance")
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.setCoord(Coordinate.newInstance(-1.7, 3.5)).build();
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VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance().setFleetSize(VehicleRoutingProblem.FleetSize.FINITE)
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.addJob(s1).addJob(s2).addJob(s3).addJob(s4).addJob(s5).addJob(s6).addJob(s7)
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.addVehicle(driver1).addVehicle(driver3);
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VehicleRoutingProblem vrp = vrpBuilder.build();
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VehicleRoutingAlgorithmBuilder vraBuilder = new VehicleRoutingAlgorithmBuilder(vrp,"input/algorithm.xml");
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vraBuilder.addDefaultCostCalculators();
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vraBuilder.addCoreConstraints();
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StateManager stateManager = new StateManager(vrp);
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StateId keyPicked = stateManager.createStateId("key-picked");
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StateId keyUsed = stateManager.createStateId("key-used");
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StateId keyDelivered = stateManager.createStateId("key-delivered");
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stateManager.addStateUpdater(new KeyStatusUpdater(stateManager,keyPicked,keyUsed,keyDelivered));
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ConstraintManager constraintManager = new ConstraintManager(vrp,stateManager);
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constraintManager.addConstraint(new GetUseAndDeliverKeySimpleHardActivityConstraint(stateManager,keyPicked,keyUsed,keyDelivered), ConstraintManager.Priority.CRITICAL);
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constraintManager.addConstraint(new GetUseAndDeliverHardRouteContraint(stateManager,keyPicked,keyUsed,keyDelivered));
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vraBuilder.setStateAndConstraintManager(stateManager,constraintManager);
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VehicleRoutingAlgorithm vra = vraBuilder.build();
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vra.setMaxIterations(100);
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Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
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SolutionPrinter.print(vrp, Solutions.bestOf(solutions), SolutionPrinter.Print.VERBOSE);
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new GraphStreamViewer(vrp, Solutions.bestOf(solutions)).labelWith(GraphStreamViewer.Label.JOB_NAME).display();
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}
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}
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