/*
* Copyright 2012 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.planner.webexamples.vehiclerouting;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.servlet.http.HttpSession;
import org.drools.planner.config.SolverFactory;
import org.drools.planner.config.XmlSolverFactory;
import org.drools.planner.core.Solver;
import org.drools.planner.core.event.BestSolutionChangedEvent;
import org.drools.planner.core.event.SolverEventListener;
import org.drools.planner.examples.vehiclerouting.domain.VrpSchedule;
import org.drools.planner.examples.vehiclerouting.persistence.VehicleRoutingSolutionImporter;
public class VrpWebAction {
private static ExecutorService solvingExecutor = Executors.newFixedThreadPool(4);
public void setup(HttpSession session) {
SolverFactory solverFactory = new XmlSolverFactory(
"/org/drools/planner/examples/vehiclerouting/solver/vehicleRoutingSolverConfig.xml");
Solver solver = solverFactory.buildSolver();
session.setAttribute(VrpSessionAttributeName.SOLVER, solver);
URL unsolvedSolutionURL = getClass().getResource("/org/drools/planner/webexamples/vehiclerouting/A-n33-k6.vrp");
VrpSchedule unsolvedSolution = (VrpSchedule) new VehicleRoutingSolutionImporter()
.readSolution(unsolvedSolutionURL);
session.setAttribute(VrpSessionAttributeName.SHOWN_SOLUTION, unsolvedSolution);
}
public void solve(final HttpSession session) {
final Solver solver = (Solver) session.getAttribute(VrpSessionAttributeName.SOLVER);
VrpSchedule unsolvedSolution = (VrpSchedule) session.getAttribute(VrpSessionAttributeName.SHOWN_SOLUTION);
solver.setPlanningProblem(unsolvedSolution);
solver.addEventListener(new SolverEventListener() {
public void bestSolutionChanged(BestSolutionChangedEvent event) {
VrpSchedule bestSolution = (VrpSchedule) event.getNewBestSolution();
session.setAttribute(VrpSessionAttributeName.SHOWN_SOLUTION, bestSolution);
}
});
solvingExecutor.submit(new Runnable() {
public void run() {
solver.solve();
}
});
}
public void terminateEarly(HttpSession session) {
final Solver solver = (Solver) session.getAttribute(VrpSessionAttributeName.SOLVER);
solver.terminateEarly();
}
}