public bool TryGetAvailableNode(out NodeEntry node)
{
var now = DateTime.Now;
var candidates = new List <NodeEntry>();
using (locker.CreateLock())
{
foreach (var candidate in nodes.Values)
{
// TODO find out why Debug.Assert(candidate.Node.HasServer); // looks like not thread safe
if (!candidate.Node.HasServer)
{
continue;
}
if (candidate.IsAvailable && !knownSelfEndPoints.Contains(candidate.Node.EndPoint) && IsReady(candidate, now))
{
candidates.Add(candidate);
}
}
}
if (!candidates.Any())
{
node = null;
return(false);
}
node = candidates[Random.Next(candidates.Count)];
return(true);
}
private void ConnectToNode(NodeEntry available)
{
available.Acquire();
var client = new Client(available.Node.EndPoint, certificate, logger);
var session = client.NodeSession;
session.OnAuthenticated += (local, remote) => OnServerAuthenticated(session, local, remote);
session.OnDisconnected += available.Release;
// TODO handle when session is disconnected
client.Start();
}
// TODO make somehing more intelligent
private bool IsReady(NodeEntry candidate, DateTime now)
{
var elapsed = now - candidate.DisconnectedTime;
return(elapsed.Seconds > 10);
}