public void On(ISubscriptionContext <GeoLocation> context, RiderEvent evt)
{
if (GeoLocation.Equals(context.Key, evt.PreviousAvailability))
{
AvailableRiders.Remove(evt.RiderId);
}
else if (GeoLocation.Equals(context.Key, evt.CurrentAvailability))
{
AvailableRiders.Add(evt.RiderId, evt);
context.ForkOrchestration(new TryMatchRider()
{
AvailableRider = evt
});
}
}
public async Task <UnitType> Execute(IOrchestrationContext context)
{
var nearbyArea = AvailableDriver.CurrentAvailability.Value.GetNearbyAreas();
RiderEvent candidate = null;
foreach (var location in nearbyArea)
{
candidate = await context.PerformRead(new GetAvailableRider()
{
Location = location
});
if (candidate != null)
{
break;
}
}
if (candidate == null)
{
// there are no matches. So we just wait until someone joins and gets matched to us.
return(UnitType.Value);
}
try
{
var result = await context.PerformOrchestration(new TryFinalizeMatch()
{
AvailableDriver = AvailableDriver,
AvailableRider = candidate
});
if (result == TryFinalizeMatch.Response.DriverRemainsUnmatched)
{
// retry in order to find another match
context.ForkOrchestration(this);
}
}
catch (TransactionException)
{
// transaction ran into trouble for some reason... retry this orchestration
context.ForkOrchestration(this);
}
return(UnitType.Value);
}
public void On(ISubscriptionContext <string> context, RiderEvent evt)
{
Availability = evt.CurrentAvailability;
}
