CongestionDetectionEventHandler.java

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package tutorial.programming.example06EventsHandling;

import java.util.HashMap;
import java.util.Map;

import org.matsim.api.core.v01.Id;
import org.matsim.api.core.v01.events.LinkEnterEvent;
import org.matsim.api.core.v01.events.LinkLeaveEvent;
import org.matsim.api.core.v01.events.PersonDepartureEvent;
import org.matsim.api.core.v01.events.handler.LinkEnterEventHandler;
import org.matsim.api.core.v01.events.handler.LinkLeaveEventHandler;
import org.matsim.api.core.v01.events.handler.PersonDepartureEventHandler;
import org.matsim.api.core.v01.network.Link;
import org.matsim.api.core.v01.network.Network;
import org.matsim.vehicles.Vehicle;
public class CongestionDetectionEventHandler implements LinkEnterEventHandler,
    LinkLeaveEventHandler, PersonDepartureEventHandler{
    
    private Map<Id<Vehicle>,Double> earliestLinkExitTime = new HashMap<>() ;
    private Network network;
    
    public CongestionDetectionEventHandler( Network network ) {
        this.network = network ;
    }

    @Override
    public void reset(int iteration) {
        this.earliestLinkExitTime.clear(); 
    }

    @Override
    public void handleEvent(LinkEnterEvent event) {
        Link link = network.getLinks().get( event.getLinkId() ) ;
        double linkTravelTime = link.getFreespeed( event.getTime() ) / link.getLength() ; 
        this.earliestLinkExitTime.put( event.getVehicleId(), event.getTime() + linkTravelTime ) ;
    }

    @Override
    public void handleEvent(LinkLeaveEvent event) {
        double excessTravelTime = event.getTime() - this.earliestLinkExitTime.get( event.getVehicleId() ) ; 
        System.out.println( "excess travel time: " + excessTravelTime ) ;
    }

    @Override
    public void handleEvent(PersonDepartureEvent event) {
        Id<Vehicle> vehId = Id.create( event.getPersonId(), Vehicle.class ) ; // unfortunately necessary since vehicle departures are not uniformly registered
        this.earliestLinkExitTime.put( vehId, event.getTime() ) ;
    }
}