// placement
IPlacementBuilder IPlacementBuilder.PlaceByJumpConsistentHash<TAffinity, TKey>()
{
if (!process.Affinities.TryGetValue(typeof(TAffinity), out var keyInfo))
{
throw new BuilderException($"undefined key {typeof(TAffinity).FullName}");
}
((PartitionedAffinityInfo<TAffinity, TKey>)keyInfo).SetPlacementFunction(
(Func<TKey, uint, uint>)
KeyFunctions.GetJumpConsistentHashFor<TKey>(process.Serializer));
return this;
}
IPlacementBuilder IPlacementBuilder.PlaceByIndex<TAffinity, TKey>(uint chunksize)
{
if (!process.Affinities.TryGetValue(typeof(TAffinity), out var keyInfo))
{
throw new BuilderException($"undefined key {typeof(TAffinity).FullName}");
}
((PartitionedAffinityInfo<TAffinity, TKey>)keyInfo).SetPlacementFunction(
(Func<TKey, uint, uint>)
KeyFunctions.GetRoundRobinFor<TKey>(chunksize));
return this;
}
public PartitionedAffinityInfo(Process process) : base(process)
{
var properties = typeof(TAffinity).GetProperties();
if (properties.Length != 1 ||
properties[0].GetGetMethod().ReturnType != typeof(TKey))
{
throw new BuilderException($"invalid affinity {typeof(TAffinity).Name} : interface must define a single property of type {typeof(TKey).Name}");
}
var method = properties[0].GetGetMethod();
RoundRobinAttribute = properties[0].GetCustomAttributes(typeof(RoundRobinPlacementAttribute), false).Count() > 0;
Selector = (x) => (TKey)method.Invoke(x, emptyArgs);
Comparator = (Func <TKey, TKey, int>)KeyFunctions.GetComparatorFor <TKey>();
}