Multi-core VRP

[James Nebeker]

Hey guys, I'm attempting to set up multi-threaded processing with VRP, and am running into an issue.FIrst, when running with no modifications I receive this error:

java.lang.IllegalArgumentException: The externalObject () cannot be looked up. Some functionality, such as multithreaded solving, requires this ability. Maybe add an @PlanningId annotation on an identifier property of the class (class []). Or otherwise, maybe change the @PlanningSolution annotation's LookUpStrategyType (not recommended)

Based on this, I added the @PlanningId annotation to my previousStandstill variable in my Ride class; the relevant line looks this like:

@PlanningVariable(valueRangeProviderRefs = { "vehicleRange",

            "rideRange" }, graphType = PlanningVariableGraphType.CHAINED)

    @PlanningId

    protected Standstill previousStandstill;

Now, I receive this error:

java.lang.IllegalArgumentException: The class (class org.acme.vehiclerouting.domain.timewindowed.TimeWindowedRide) has a member (protected org.acme.vehiclerouting.domain.Standstill org.acme.vehiclerouting.domain.Ride.previousStandstill) with a @PlanningId annotation that returns a type (interface org.acme.vehiclerouting.domain.Standstill) that does not implement Comparable.

Any help would be greatly appreciated.

[Lukáš Petrovický]

On Wed, Jan 12, 2022 at 11:31 PM James Nebeker <jneb...@truckitapp.com> wrote:

java.lang.IllegalArgumentException: The class (class org.acme.vehiclerouting.domain.timewindowed.TimeWindowedRide) has a member (protected org.acme.vehiclerouting.domain.Standstill org.acme.vehiclerouting.domain.Ride.previousStandstill) with a @PlanningId annotation that returns a type (interface org.acme.vehiclerouting.domain.Standstill) that does not implement Comparable.

The message is saying that your PlanningId needs to implement the java.lang.Comparable interface. 

PlanningIds are typically Integers or Longs.

Regards!

 

--

Lukáš Petrovický

He/Him/His

Principal Software Engineer, Business Automation

lukas.pe...@redhat.com    IM: triceo/lpetrovi

My work week is Monday to Thursday.