Using VRS for concurrent request - optaplanner

Question

We need to use a single instace of VRS to support concurrent request.
We have a requirement where multiple different users should be able to create a route plan for different vehicles and locations same time. However, looking at VRS functionality, I am not able to understand how applications supports it. For demo, when I create a different route using different browser, it always merges first and second request and give one single result.
Just a little more elobration on the question:
We are aiming to convert requests as REST API endpoints which will be invoked by different uses same time for their usecase.
Eg. Request 1: Vehicle 1&2 with 50 locations. VRS can calculate route & give one message with all detailed calculations for request1.
Request 2: Vehicle 3 & 4 with 40 locations. So VRS can calculate route which later we can get as one message with all detailed calculations limited to request 2.
Both requests can be submitted same time & application should considered as separate requests without getting merged.
Is there a way to add request ID or any other paramaters to achive this?

Answer 1

For multi-tenant solving, the SolverManager API is ideal:
public class TimeTableService {
// tenantId is Long, but it can also be String or UUID
private SolverManager<TimeTable, Long> solverManager;
// Returns immediately, call it for every dataset
public void solveBatch(Long tenantId) {
solverManager.solve(tenantId,
// Called once, when solving starts
this::findById,
// Called once, when solving ends
this::save);
}
public TimeTable findById(Long tenantId) {...}
public void save(TimeTable timeTable) {...}
}