The route cache key followed the relay's rest, so after one failed relay request
(always the case offline) every day the device held only from Valhalla missed
the cache for ten minutes. The key now follows the configured provider, and a
resting relay only stops the question from going out.
A route now names the engine that drew it. A day OSRM drew because Valhalla
could not answer is OSRM's on the rail, and its other ways are asked of OSRM,
instead of being labelled Valhalla's and compared with Valhalla offers.
An own Valhalla gets the relay's twelve second deadline, and a day that runs it
out goes to OSRM without a second wait. A day that avoids something keeps its
old cache key, so the days a device already holds stay found. The leg segment
and the offer types move to modules both engines import.
With the TREK services or an own Valhalla, the day plan, the road trip and
the other ways of a leg are routed by Valhalla on foot, by bike and by car,
twenty locations a request. A day it cannot answer (relay refusal, time out,
no way for a leg) goes to OSRM whole and without a word; it is never handed
to FOSSGIS unless it avoids something only Valhalla can avoid. With FOSSGIS
nothing changes: OSRM routes the days and Valhalla the avoidances.
A Valhalla answer is cached under its own key beside the OSRM one, so
switching engines never serves a day from the other engine. The Valhalla
day routing moves out of RouteCalculator into valhallaDayRoute.ts.
Maurice