internal override async Task <PlacementResult> OnSelectActivation(
PlacementStrategy strategy, GrainId target, IPlacementContext context)
{
List <ActivationAddress> places = await context.Lookup(target);
if (places.Count <= 0)
{
// we return null to indicate that we were unable to select a target from places activations.
return(null);
}
if (places.Count == 1)
{
return(PlacementResult.IdentifySelection(places[0]));
}
// places.Count > 0
// Choose randomly if there is one, else make a new activation of the target
// pick local if available (consider making this a purely random assignment of grains).
var here = context.LocalSilo;
var local = places.Where(a => a.Silo.Equals(here)).ToList();
if (local.Count > 0)
{
return(PlacementResult.IdentifySelection(local[random.Next(local.Count)]));
}
if (places.Count > 0)
{
return(PlacementResult.IdentifySelection(places[random.Next(places.Count)]));
}
// we return null to indicate that we were unable to select a target from places activations.
return(null);
}
public virtual async Task <PlacementResult> OnSelectActivation(
PlacementStrategy strategy, GrainId target, IPlacementContext context)
{
List <ActivationAddress> places = (await context.Lookup(target)).Addresses;
return(ChooseRandomActivation(places, context));
}
internal override async Task<PlacementResult> OnSelectActivation(
PlacementStrategy strategy, GrainId target, IPlacementContext context)
{
List<ActivationAddress> places = await context.Lookup(target);
if (places.Count <= 0)
{
// we return null to indicate that we were unable to select a target from places activations.
return null;
}
if (places.Count == 1) return PlacementResult.IdentifySelection(places[0]);
// places.Count > 0
// Choose randomly if there is one, else make a new activation of the target
// pick local if available (consider making this a purely random assignment of grains).
var here = context.LocalSilo;
var local = places.Where(a => a.Silo.Equals(here)).ToList();
if (local.Count > 0)
return PlacementResult.IdentifySelection(local[random.Next(local.Count)]);
if (places.Count > 0)
return PlacementResult.IdentifySelection(places[random.Next(places.Count)]);
// we return null to indicate that we were unable to select a target from places activations.
return null;
}
internal override async Task<PlacementResult> OnSelectActivation(
PlacementStrategy strategy, GrainId target, IPlacementContext context)
{
List<ActivationAddress> places = (await context.Lookup(target)).Addresses;
return ChooseRandomActivation(places, context);
}