public bool TrySelectActivationSynchronously(
PlacementStrategy strategy, GrainId target, IPlacementRuntime context, out PlacementResult placementResult)
{
AddressesAndTag addressesAndTag;
if (context.FastLookup(target, out addressesAndTag))
{
placementResult = ChooseRandomActivation(addressesAndTag.Addresses, context);
return(true);
}
placementResult = null;
return(false);
}
public virtual ValueTask <PlacementResult> OnSelectActivation(
PlacementStrategy strategy,
GrainId target,
IPlacementRuntime context)
{
if (context.FastLookup(target, out var addresses))
{
var placementResult = ChooseRandomActivation(addresses, context);
return(new ValueTask <PlacementResult>(placementResult));
}
return(SelectActivationAsync(target, context));
async ValueTask <PlacementResult> SelectActivationAsync(GrainId target, IPlacementRuntime context)
{
var places = await context.FullLookup(target);
return(ChooseRandomActivation(places, context));
}
}
public override ValueTask <PlacementResult> OnSelectActivation(PlacementStrategy strategy, GrainId target, IPlacementRuntime context)
{
if (!ClientGrainId.TryParse(target, out var clientId))
{
throw new InvalidOperationException($"Unsupported id format: {target}");
}
var grainId = clientId.GrainId;
if (context.FastLookup(grainId, out var addresses))
{
var placementResult = ChooseRandomActivation(addresses, context);
return(new ValueTask <PlacementResult>(placementResult));
}
return(SelectActivationAsync(grainId, context));
async ValueTask <PlacementResult> SelectActivationAsync(GrainId target, IPlacementRuntime context)
{
var places = await context.FullLookup(target);
return(ChooseRandomActivation(places, context));
}
}
public static Task <AddressesAndTag> Lookup(this IPlacementRuntime @this, GrainId grainId)
{
AddressesAndTag l;
return(@this.FastLookup(grainId, out l) ? Task.FromResult(l) : @this.FullLookup(grainId));
}
