/// <summary>
/// Use instead of IGrain.AsReference() and IGrain.Cast()!
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="this"></param>
/// <returns></returns>
public static T CastAs <T>(this IGrain @this) where T : IGrain
{
//in place to short-circuit Orleans when testing; should always be used
var proxy = @this as GrainProxy;
if (proxy != null)
{
return((T)(object)proxy); //eeek!
}
var grain = @this as Grain;
if (grain != null)
{
//need to proxy here - but how can we know what key, and what interface(s), we are proxying?
//the grain itself is kind of agnostic to this. Except that it isn't - it will need to carry
//round its 'activation context' where it clings still to the data that begot it.
//A placement, as well as carrying concrete type, therefore also needs to carry the initializing abstract key.
//But what then to do with other keys that resolve to the same?
//Or do we proxify with the full set of interfaces the grain supports? Can't do - as the resolution logic may be different for other interfaces -
//roundtripping may not be possible, and therefore the intended reference will point elsewhere...
throw new NotImplementedException("Need to give access to key via GrainRuntime extraction");
//var harness = ExtractGrainRuntimeFrom(@this) as GrainHarness; //the GrainRuntime needs to give access to
//if(harness != null) {
// var concreteKey = @this.GetGrainKey();
// var grainKey = new ResolvedKey(typeof(T), concreteKey.AbstractType, concreteKey.Id);
// return (T)(object)harness.Fixture.GetGrainProxy(grainKey);
//}
}
return(@this.AsReference <T>());
}
private Func <object, Task> GetTimerFunc(IProviderRuntime providerRuntime, IGrain grain)
{
var grainName = grain.GetType().FullName;
return(async o =>
{
var filterableGrain = grain.AsReference <IFilterableGrain>();
var result = await filterableGrain.GetFilters();
if (result != null)
{
var filterGrain = providerRuntime.GrainFactory.GetGrain <ITypeFilterGrain>(grain.GetType().FullName);
await filterGrain.RegisterFilter(grainName, filterableGrain.GetPrimaryKey().ToString(), result);
var filterString = string.Join(",", result.Select(p => $"{p.FilterName} : {p.Value}"));
_logger.Verbose($"Filters for grain [Type : {grainName}] [Id : {grain.GetPrimaryKey()}][Filter : {filterString}]");
}
else
{
_logger.Verbose("Filter was not set yet");
}
});
}