public string GetNode(string key)
{
var members = _m.GetAllMembers();
if (members == null || members.Count == 0)
{
return("");
}
if (members.Count == 1)
{
return(members[0].Address);
}
var keyBytes = Encoding.UTF8.GetBytes(key);
uint maxScore = 0;
MemberStatus maxNode = null;
uint score;
for (int i = 0; i < members.Count; i++)
{
var member = members[i];
if (member.Alive)
{
var hashBytes = _memberHashes[i];
score = RdvHash(hashBytes, keyBytes);
if (score > maxScore)
{
maxScore = score;
maxNode = member;
}
}
}
return(maxNode == null ? "" : maxNode.Address);
}
private static void UpdateAndNotify(MemberStatus @new, MemberStatus old)
{
if (@new == null && old == null)
{
return; //ignore
}
if (@new == null)
{
//update MemberStrategy
foreach (var k in old.Kinds)
{
if (MemberStrategyByKind.TryGetValue(k, out var ms))
{
ms.RemoveMember(old);
if (ms.GetAllMembers().Count == 0)
{
MemberStrategyByKind.Remove(k);
}
}
}
//notify left
var left = new MemberLeftEvent(old.Host, old.Port, old.Kinds);
Actor.EventStream.Publish(left);
Members.Remove(old.Address);
var endpointTerminated = new EndpointTerminatedEvent
{
Address = old.Address
};
Actor.EventStream.Publish(endpointTerminated);
return;
}
if (old == null)
{
//update MemberStrategy
foreach (var k in @new.Kinds)
{
if (!MemberStrategyByKind.ContainsKey(k))
{
MemberStrategyByKind[k] = Cluster.Config.MemberStrategyBuilder(k);
}
MemberStrategyByKind[k].AddMember(@new);
}
//notify joined
var joined = new MemberJoinedEvent(@new.Host, @new.Port, @new.Kinds);
Actor.EventStream.Publish(joined);
return;
}
//update MemberStrategy
if (@new.Alive != old.Alive || @new.MemberId != old.MemberId || @new.StatusValue != null && [email protected](old.StatusValue))
{
foreach (var k in @new.Kinds)
{
if (MemberStrategyByKind.TryGetValue(k, out var ms))
{
ms.UpdateMember(@new);
}
}
}
//notify changes
if (@new.MemberId != old.MemberId)
{
var rejoined = new MemberRejoinedEvent(@new.Host, @new.Port, @new.Kinds);
Actor.EventStream.Publish(rejoined);
}
}
public void AddMember(MemberStatus member)
{
_members.Add(member);
_rdv.UpdateRdv();
}
