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Code Issues Releases Wiki Activity

speed up regret insertion with breaks

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This commit is contained in:
oblonski 2015-10-14 18:26:58 +02:00
parent 10defbe1ec
commit de8689060a
2 changed files with 155 additions and 5 deletions
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153
jsprit-core/src/main/java/jsprit/core/algorithm/recreate/RegretInsertion.java
View file

@ -27,10 +27,7 @@ import jsprit.core.problem.solution.route.VehicleRoute;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.*;
/**
* Insertion based on regret approach.
@ -185,6 +182,33 @@ public class RegretInsertion extends AbstractInsertionStrategy {
}
static class VersionedInsertionData {
private InsertionData iData;
private VehicleRoute route;
private int version;
public VersionedInsertionData(InsertionData iData, int version, VehicleRoute route) {
this.iData = iData;
this.version = version;
this.route = route;
}
public InsertionData getiData() {
return iData;
}
public int getVersion() {
return version;
}
public VehicleRoute getRoute() {
return route;
}
}
private static Logger logger = LogManager.getLogger(RegretInsertion.class);
private ScoringFunction scoringFunction;
@ -192,6 +216,7 @@ public class RegretInsertion extends AbstractInsertionStrategy {
private JobInsertionCostsCalculator insertionCostsCalculator;
/**
* Sets the scoring function.
* <p/>
@ -247,17 +272,35 @@ public class RegretInsertion extends AbstractInsertionStrategy {
}
List<Job> jobs = new ArrayList<Job>(unassignedJobs);
PriorityQueue<VersionedInsertionData>[] priorityQueues = new PriorityQueue[vrp.getJobs().values().size() + 2];
VehicleRoute lastModified = null;
boolean firstRun = true;
int updateRound = 0;
Map<VehicleRoute,Integer> updates = new HashMap<VehicleRoute, Integer>();
while (!jobs.isEmpty()) {
List<Job> unassignedJobList = new ArrayList<Job>(jobs);
List<Job> badJobList = new ArrayList<Job>();
ScoredJob bestScoredJob = nextJob(routes, unassignedJobList, badJobList);
if(firstRun){
firstRun = false;
updateInsertionData(priorityQueues, routes, unassignedJobList, badJobList, updateRound, updates);
}
else{
updateInsertionData(priorityQueues, Arrays.asList(lastModified), unassignedJobList, badJobList, updateRound, updates);
}
updateRound++;
ScoredJob bestScoredJob = getBest(priorityQueues,updates,unassignedJobList,badJobList);
// InsertionData d = insertionCostsCalculator.getInsertionData(bestScoredJob.getRoute(), bestScoredJob.getJob(), NO_NEW_VEHICLE_YET, NO_NEW_DEPARTURE_TIME_YET, NO_NEW_DRIVER_YET, Double.MAX_VALUE);
//
// ScoredJob bestScoredJob = nextJob(routes, unassignedJobList, badJobList);
if (bestScoredJob != null) {
if (bestScoredJob.isNewRoute()) {
routes.add(bestScoredJob.getRoute());
}
insertJob(bestScoredJob.getJob(), bestScoredJob.getInsertionData(), bestScoredJob.getRoute());
jobs.remove(bestScoredJob.getJob());
lastModified = bestScoredJob.getRoute();
}
else throw new IllegalStateException("fooo");
for (Job bad : badJobList) {
jobs.remove(bad);
badJobs.add(bad);
@ -266,6 +309,106 @@ public class RegretInsertion extends AbstractInsertionStrategy {
return badJobs;
}
private ScoredJob getBest(PriorityQueue<VersionedInsertionData>[] priorityQueues, Map<VehicleRoute, Integer> updates, List<Job> unassignedJobList, List<Job> badJobs) {
ScoredJob bestScoredJob = null;
for(Job j : unassignedJobList){
VehicleRoute bestRoute = null;
InsertionData best = null;
InsertionData secondBest = null;
PriorityQueue<VersionedInsertionData> priorityQueue = priorityQueues[j.getIndex()];
Iterator<VersionedInsertionData> iterator = priorityQueue.iterator();
while(iterator.hasNext()){
VersionedInsertionData versionedIData = iterator.next();
if(versionedIData.getiData() instanceof InsertionData.NoInsertionFound) continue;
int currentDataVersion = updates.get(versionedIData.getRoute());
if(versionedIData.getVersion() == currentDataVersion){
if(best == null) {
best = versionedIData.getiData();
bestRoute = versionedIData.getRoute();
}
else {
secondBest = versionedIData.getiData();
break;
}
}
}
VehicleRoute emptyRoute = VehicleRoute.emptyRoute();
InsertionData iData = insertionCostsCalculator.getInsertionData(emptyRoute, j, NO_NEW_VEHICLE_YET, NO_NEW_DEPARTURE_TIME_YET, NO_NEW_DRIVER_YET, Double.MAX_VALUE);
if(!(iData instanceof InsertionData.NoInsertionFound)){
if (best == null) {
best = iData;
bestRoute = emptyRoute;
} else if (iData.getInsertionCost() < best.getInsertionCost()) {
secondBest = best;
best = iData;
bestRoute = emptyRoute;
} else if (secondBest == null || (iData.getInsertionCost() < secondBest.getInsertionCost())) {
secondBest = iData;
}
}
if (best == null) {
badJobs.add(j);
continue;
}
double score = score(j, best, secondBest, scoringFunction);
ScoredJob scoredJob;
if (bestRoute == emptyRoute) {
scoredJob = new ScoredJob(j, score, best, bestRoute, true);
} else scoredJob = new ScoredJob(j, score, best, bestRoute, false);
if(bestScoredJob == null){
bestScoredJob = scoredJob;
}
else if(scoredJob.getScore() > bestScoredJob.getScore()){
bestScoredJob = scoredJob;
}
}
return bestScoredJob;
}
private Comparator<VersionedInsertionData> getComparator(){
return new Comparator<VersionedInsertionData>() {
@Override
public int compare(VersionedInsertionData o1, VersionedInsertionData o2) {
if(o1.getiData().getInsertionCost() < o2.getiData().getInsertionCost()) return -1;
return 1;
}
};
}
private void updateInsertionData(PriorityQueue<VersionedInsertionData>[] priorityQueues, Collection<VehicleRoute> routes, List<Job> unassignedJobList, List<Job> badJobList, int updateRound, Map<VehicleRoute, Integer> updates) {
for (Job unassignedJob : unassignedJobList) {
if(priorityQueues[unassignedJob.getIndex()] == null){
priorityQueues[unassignedJob.getIndex()] = new PriorityQueue<VersionedInsertionData>(unassignedJobList.size(), getComparator());
}
for(VehicleRoute route : routes) {
InsertionData iData = insertionCostsCalculator.getInsertionData(route, unassignedJob, NO_NEW_VEHICLE_YET, NO_NEW_DEPARTURE_TIME_YET, NO_NEW_DRIVER_YET, Double.MAX_VALUE);
priorityQueues[unassignedJob.getIndex()].add(new VersionedInsertionData(iData,updateRound,route));
updates.put(route,updateRound);
}
//
//
//
// ScoredJob scoredJob = getScoredJob(routes, unassignedJob, insertionCostsCalculator, scoringFunction);
// if (scoredJob instanceof BadJob) {
// badJobs.add(unassignedJob);
// continue;
// }
// if (bestScoredJob == null) bestScoredJob = scoredJob;
// else {
// if (scoredJob.getScore() > bestScoredJob.getScore()) {
// bestScoredJob = scoredJob;
// } else if (scoredJob.getScore() == bestScoredJob.getScore()) {
// if (scoredJob.getJob().getId().compareTo(bestScoredJob.getJob().getId()) <= 0) {
// bestScoredJob = scoredJob;
// }
// }
// }
}
}
private VehicleRoute findRoute(Collection<VehicleRoute> routes, Job job) {
for(VehicleRoute r : routes){
if(r.getVehicle().getBreak() == job) return r;

7
jsprit-core/src/main/java/jsprit/core/algorithm/recreate/VehicleTypeDependentJobInsertionCalculator.java
View file

@ -93,6 +93,9 @@ final class VehicleTypeDependentJobInsertionCalculator implements JobInsertionCo
}
public InsertionData getInsertionData(final VehicleRoute currentRoute, final Job jobToInsert, final Vehicle vehicle, double newVehicleDepartureTime, final Driver driver, final double bestKnownCost) {
if(vehicle != null){
return insertionCalculator.getInsertionData(currentRoute, jobToInsert, vehicle, newVehicleDepartureTime, driver, bestKnownCost);
}
Vehicle selectedVehicle = currentRoute.getVehicle();
Driver selectedDriver = currentRoute.getDriver();
InsertionData bestIData = InsertionData.createEmptyInsertionData();
@ -122,6 +125,10 @@ final class VehicleTypeDependentJobInsertionCalculator implements JobInsertionCo
return bestIData;
}
VehicleFleetManager getFleetManager(){
return fleetManager;
}
private boolean isVehicleWithInitialRoute(Vehicle selectedVehicle) {
return initialVehicleIds.contains(selectedVehicle.getId());
}