/// <summary>
/// Opens a host to accept incoming connections. Connects to a registration server.
/// </summary>
/// <param name="registrationServerNameOrAddress">Name or address of the registration server.</param>
/// <param name="registrationServerPort">The port number to the registration server.</param>
/// <param name="listenerPort">The port that this node accepts connections on.</param>
private void OpenAndConnectToRegistrationServer(string registrationServerNameOrAddress, int registrationServerPort, int listenerPort)
{
if (_host == null)
{
try
{
//Open a connection to the registration server
IPEndPoint registrationServerEndPoint = new IPEndPoint(Dns.GetHostEntry(registrationServerNameOrAddress).AddressList[0], registrationServerPort);
_registrationServerProxy = ProxyFactory.CreateProxy <IRegistrationServer>(registrationServerEndPoint);
//get the nodes that are already registered
List <IPEndPoint> remoteNodeEndPoints = _registrationServerProxy.GetAllNodeEndPoints();
_remoteNodes.Clear();
foreach (IPEndPoint endpoint in remoteNodeEndPoints)
{
INode remoteNode = new RemoteNodeProxy(endpoint);
_remoteNodes.Add(remoteNode.GetId(), remoteNode);
}
//open the host that contains this node
_host = new ServiceHost(this, listenerPort);
_host.Open();
//Register the host with the registration server. This causes all other registered nodes to connect to this one
_registrationServerProxy.RegisterNode(_host.EndPoint);
}
catch (Exception ex)
{
string msg = ex.InnerException != null ? ex.InnerException.Message : ex.Message;
Log.Error("Could not connect to registration server. Message reads : {0}", msg);
}
}
}
public void NodeRegistered(IPEndPoint nodeEndPoint)
{
lock (_remoteNodes)
{
INode node = new RemoteNodeProxy(nodeEndPoint);
ushort nodeId = node.GetId();
_remoteNodes.Add(nodeId, node);
//notify all local workers that a new remote node has entered the grid
lock (_localWorkers)
{
foreach (Worker worker in _localWorkers.Values)
{
worker.OnRemoteNodeRegistered(nodeId);
}
}
}
}