public void Send(IActorId to, string name, params object[] args)
{
node.Send(to, id, name, args);
}
public RpcSender(Node node, IActorId id)
{
this.id = id;
this.node = node;
}
public void Reply(IActorId to, IMessageId msg, string name, params object[] args)
{
node.Reply(to, id, msg, name, args);
}
IActorId[] GetClosest(string key, int count)
{
var hash = HashAlgorithm.ComputeHash(key.ToString());
var array = new IActorId[count];
lock (actors)
{
var index = this.actors.BinarySearch(KeyValuePair.New(hash, (IActorId)null), n => n.Key);
if (index < 0) index = ~index - 1;
if (index < 0) index = actors.Count - 1;
for (int i = 0; i < array.Length; i++)
array[i] = actors[(index + i) % actors.Count].Value;
}
return array;
}
public DhtRing(IActorId self)
{
this.HashAlgorithm = new SHA1Managed();
this.SelfId = self;
this.actors.Add(KeyValuePair.New(HashAlgorithm.ComputeHash(self.ToString()), self));
}
void AddInternal(IActorId id)
{
var hash = HashAlgorithm.ComputeHash(id.ToString());
lock (actors)
{
var index = actors.BinarySearch(KeyValuePair.New(hash, (IActorId)null), n => n.Key);
if (index >= 0) return;
actors.Insert(~index, KeyValuePair.New(hash, id));
}
}
public void Remove(IActorId id)
{
lock (actors)
{
actors.RemoveWhere(n => n.Value.Equals(id));
}
}
public IActorId[] FindAll(int ttl, IActorId originator = null)
{
if (ttl < 0) return new IActorId[0];
lock (actors)
return Enumerable.Range(0, ttl)
.Select(n => Find(n))
.Where(n => n != null)
.ToArray();
}
public IActorId Find(int ttl, IActorId originator = null)
{
lock (actors)
{
if (ttl < 0) return null;
int selfIndex = SelfIndex;
if (selfIndex < 0) return null;
int distance = (int)Math.Pow(2, ttl);
if (distance >= actors.Count) return null;
int endPoint = selfIndex + distance;
if (endPoint >= actors.Count)
endPoint -= actors.Count;
var destination = actors[endPoint];
if (destination.Equals(SelfId)) return null;
if (originator == null) originator = SelfId;
var hash = HashAlgorithm.ComputeHash(originator.ToString());
var originatorIndex = actors.BinarySearch(KeyValuePair.New(hash,(IActorId) null), n => n.Key);
if (IsBetween(originatorIndex, selfIndex, endPoint))
{
// if the originator is between us and the endpoint it means
// if we send this message it will have wrapped completely around
// the ring. if we do that nodes will receive the same message twice
// so stop this message instead.
return null;
}
return destination.Value;
}
}
public void Add(IActorId id)
{
AddInternal(id);
}
