private bool PrepareFriend(Host host, Peers peers)
{
try
{
NodeValidator nv = new NodeValidator();
nv.ValidateNode(cluster, host);
// Check for duplicate nodes in nodes slated to be added.
Node node;
if (peers.nodes.TryGetValue(nv.name, out node))
{
// Duplicate node name found. This usually occurs when the server
// services list contains both internal and external IP addresses
// for the same node.
nv.primaryConn.Close();
peers.hosts.Add(host);
node.aliases.Add(host);
return(true);
}
// Check for duplicate nodes in cluster.
if (cluster.nodesMap.TryGetValue(nv.name, out node))
{
nv.primaryConn.Close();
peers.hosts.Add(host);
node.aliases.Add(host);
node.referenceCount++;
cluster.aliases[host] = node;
return(true);
}
node = cluster.CreateNode(nv);
peers.hosts.Add(host);
peers.nodes[nv.name] = node;
return(true);
}
catch (Exception e)
{
if (Log.WarnEnabled())
{
Log.Warn("Add node " + host + " failed: " + Util.GetErrorMessage(e));
}
return(false);
}
}
private List <Node> FindNodesToAdd(List <Host> hosts)
{
List <Node> list = new List <Node>(hosts.Count);
foreach (Host host in hosts)
{
try
{
NodeValidator nv = new NodeValidator();
nv.ValidateNode(this, host);
Node node = FindNode(nv.name, list);
if (node != null)
{
// Duplicate node name found. This usually occurs when the server
// services list contains both internal and external IP addresses
// for the same node. Add new host to list of alias filters
// and do not add new node.
nv.conn.Close();
node.referenceCount++;
node.AddAlias(host);
aliases[host] = node;
continue;
}
node = CreateNode(nv);
list.Add(node);
}
catch (Exception e)
{
if (Log.WarnEnabled())
{
Log.Warn("Add node " + host + " failed: " + Util.GetErrorMessage(e));
}
}
}
return(list);
}
protected internal void RefreshPeers(Peers peers)
{
// Do not refresh peers when node connection has already failed during this cluster tend iteration.
if (failures > 0 || !active)
{
return;
}
try
{
if (Log.DebugEnabled())
{
Log.Debug("Update peers for node " + this);
}
PeerParser parser = new PeerParser(cluster, tendConnection, peers.peers);
peersCount = peers.peers.Count;
bool peersValidated = true;
foreach (Peer peer in peers.peers)
{
if (FindPeerNode(cluster, peers, peer.nodeName))
{
// Node already exists. Do not even try to connect to hosts.
continue;
}
bool nodeValidated = false;
// Find first host that connects.
foreach (Host host in peer.hosts)
{
try
{
// Attempt connection to host.
NodeValidator nv = new NodeValidator();
nv.ValidateNode(cluster, host);
if (!peer.nodeName.Equals(nv.name))
{
// Must look for new node name in the unlikely event that node names do not agree.
if (Log.WarnEnabled())
{
Log.Warn("Peer node " + peer.nodeName + " is different than actual node " + nv.name + " for host " + host);
}
if (FindPeerNode(cluster, peers, nv.name))
{
// Node already exists. Do not even try to connect to hosts.
nv.primaryConn.Close();
nodeValidated = true;
break;
}
}
// Create new node.
Node node = cluster.CreateNode(nv);
peers.nodes[nv.name] = node;
nodeValidated = true;
break;
}
catch (Exception e)
{
if (Log.WarnEnabled())
{
Log.Warn("Add node " + host + " failed: " + Util.GetErrorMessage(e));
}
}
}
if (!nodeValidated)
{
peersValidated = false;
}
}
// Only set new peers generation if all referenced peers are added to the cluster.
if (peersValidated)
{
peersGeneration = parser.generation;
}
peers.refreshCount++;
}
catch (Exception e)
{
RefreshFailed(e);
}
}
private List<Node> FindNodesToAdd(List<Host> hosts)
{
List<Node> list = new List<Node>(hosts.Count);
foreach (Host host in hosts)
{
try
{
NodeValidator nv = new NodeValidator();
nv.ValidateNode(this, host);
Node node = FindNode(nv.name, list);
if (node != null)
{
// Duplicate node name found. This usually occurs when the server
// services list contains both internal and external IP addresses
// for the same node. Add new host to list of alias filters
// and do not add new node.
nv.conn.Close();
node.referenceCount++;
node.AddAlias(host);
aliases[host] = node;
continue;
}
node = CreateNode(nv);
list.Add(node);
}
catch (Exception e)
{
if (Log.WarnEnabled())
{
Log.Warn("Add node " + host + " failed: " + Util.GetErrorMessage(e));
}
}
}
return list;
}