CODEWITHSUNDEEP
droolsoptaplanner
user2195559
user2195559

Reputation: 321

Optaplanner: Extend vehiclerouting example to include secure transport

I am want to add a simple boolean value to each vehicle that indicates if the vehicle is secure, then for each customer a similar boolean to indicate that the customer requires a secure vehicle.

I have got as far as working out I need to:

This is a little pathetic - but I am pushed for time and the drools manual is massive and I cannot figure out the syntax for what I think is a simple rule. Could some kind soul give me a starter here please.

Upvotes: 0

Views: 147

Answers (1)

user2195559
user2195559

Reputation: 321

Got it working!

I have done the following:

  • extend the domain objects for Vehicle and Customer to reflect these. 

    //Vehicle.java
protected boolean secure;
public boolean isSecure() {return secure;}
public void setSecure(boolean secure) {this.secure = secure;}

//Customer.java
protected boolean needsSecure;
public boolean isNeedsSecure() {return needsSecure;}
public void setNeedsSecure(boolean needsSecure) {this.needsSecure = needsSecure;}

  • extend the input XML to have at least one secure Vehicle and one Customer requiring a secure collection.

    //cvrptw-25customers-secure.xml - cloned from cvrptw-25customers.xml
<VrpVehicle id="56">
  <id>24</id>
  <capacity>200</capacity>
  <depot class="VrpTimeWindowedDepot" reference="30"/>
  <secure>true</secure>
</VrpVehicle>

<VrpTimeWindowedCustomer id="58">
 <id>1</id>
 <location reference="4"/>
 <demand>10</demand>
 <readyTime>912000</readyTime>
 <dueTime>967000</dueTime>
 <serviceDuration>90000</serviceDuration>
 <needsSecure>true</needsSecure>
</VrpTimeWindowedCustomer>

  • extend the vehicleRoutingScoreRules.drl to add a new rule "secure" with a hard constraint. 

    rule "securePackage"
  when
    $customer : Customer(needsSecure == true, vehicle != null, vehicle.isSecure == false)
  then
    scoreHolder.addHardConstraintMatch(kcontext, -1);
end

And it all works! With 3 "secure" customers with a total need = the total secure vehicle capacity I can see that one vehicle (the secure one) does all 3 pickups and is full.

Upvotes: 2

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