}//ProcessForeignServiceConnect()
//
// *************************************************
// **** ForeignServerConnect() ****
// *************************************************
/// <summary>
/// Called when a ForeignServer is connected (or re-connected) to its remote
/// via a new Conversation.
/// </summary>
/// <param name="fs"></param>
/// <param name="newConversationId"></param>
protected void ForeignServerConnect(ForeignServer fs, int newConversationId = -1)
{
if (newConversationId >= 0)
{
fs.ConversationId = newConversationId; // otherwise assume caller already set id.
}
if (m_ServersDisconnected.Contains(fs)) // remove from disconnected list.
{
m_ServersDisconnected.Remove(fs);
}
if (m_ServersConnected.ContainsKey(fs.ConversationId)) // add to connected list
{
if (m_ServersConnected[fs.ConversationId] != fs)
{
Log.NewEntry(LogLevel.Error, "ConnectForeignServer: Error! Collision between servers {1} {0}", fs, m_ServersConnected[fs.ConversationId]);
Log.NewEntry(LogLevel.Error, "ConnectForeignServer: Overwriting with new server.");
m_ServersConnected[fs.ConversationId] = fs;
}
}
else
{
m_ServersConnected.Add(fs.ConversationId, fs); // this is the normal situation
}
fs.m_Manager = this; // make sure it knows its manager.
Log.NewEntry(LogLevel.Major, "ConnectForeignServer: Connected {0}", fs);
}//ForeignServerConnect()
}//ForeignServerConnect()
//
//
// ****************************************************
// **** ForeignServerDisconnect() ****
// ****************************************************
/// <summary>
/// When a conversation ends, the associated ForeignServer is moved
/// to the disconnected list. Its conversation ID is set to -1.
/// </summary>
/// <param name="fs"></param>
protected void ForeignServerDisconnect(ForeignServer fs)
{
int id = fs.ConversationId;
if (m_ServersConnected.ContainsKey(id))
{
m_ServersConnected.Remove(id);
}
fs.ConversationId = -1;
if (!m_ServersDisconnected.Contains(fs))
{
m_ServersDisconnected.Add(fs);
}
Log.NewEntry(LogLevel.Major, "DisconnectForeignServer: Disconnected {0}", fs);
}//ForeignServerDisconnect()
}//ProcessSocketEvent
//
//
// *************************************************************
// **** ProcessRequestMessage() ****
// *************************************************************
/// <summary>
/// These are Messages that originated from foreign servers.
/// </summary>
/// <param name="eventArg"></param>
/// <param name="msg"></param>
private void ProcessMessageRequests(SocketEventArgs eventArg, Message msg)
{
switch (msg.MessageType)
{
case MessageType.Credentials:
// A foreign server that just connected is required to send
// credentials before we tell him about our services.
bool isCredentialed = true;
// TODO: Test credentials
if (isCredentialed)
{ // Connection credentials succeeded. Accept foreign connection.
ForeignServer server = (ForeignServer)msg.Data[0];
ForeignServerConnect(server, eventArg.ConversationId);
// Send him my services.
List <IService> iServiceList = m_AppServices.GetServices();
SendServices(server.ConversationId, MessageType.ServiceAdded, iServiceList); // send server our services
}
else
{
SendMessage(eventArg.ConversationId, GetMessage(MessageType.Credentials, MessageState.Failed));
}
break;
case MessageType.CreateServices:
break;
case MessageType.ServiceAdded:
break;
case MessageType.ServiceRemoved:
foreach (IStringifiable istring in msg.Data)
{
}
break;
case MessageType.EngineEvent:
break;
} //switch
} // ProcessRequestMessage()
} // ProcessRequestMessage()
//
//
//
//
// *************************************************************
// **** ProcessConfirmMessage() ****
// *************************************************************
private void ProcessMessageResponses(SocketEventArgs eventArg, Message msg)
{
// Get server responding
ForeignServer foreignServer = null;
if (!m_ServersConnected.TryGetValue(eventArg.ConversationId, out foreignServer))
{
Log.NewEntry(LogLevel.Warning, "ProcessConfirmMessage: Unknown server {0} with message: {1}", eventArg, msg);
return;
}
switch (msg.MessageType)
{
case MessageType.Credentials:
if (msg.State == MessageState.Confirmed)
{ // Our credentials were accepted.
Log.NewEntry(LogLevel.Minor, "ProcessConfirmMessage: Credentials accepted by {0}", foreignServer);
}
else
{
Log.NewEntry(LogLevel.Minor, "ProcessConfirmMessage: Credentials rejected by {0}. Disconnecting.", foreignServer);
m_Socket.StopConversation(foreignServer.ConversationId);
ForeignServerDisconnect(foreignServer);
}
break;
case MessageType.CreateServices:
break;
case MessageType.ServiceAdded:
// ForeignServer has added a new service.
// Here, I want to make a ghost-service that represents each service provided by the foreign server.
Log.BeginEntry(LogLevel.Minor, "ProcessConfirmMessage: Services discovered on {0}:", foreignServer);
foreach (IStringifiable iStr in msg.Data)
{
if (iStr is ForeignService)
{
ForeignService foreignService = (ForeignService)iStr;
if (foreignServer.TryAddService(foreignService))
{
Log.AppendEntry(" {0}", foreignService);
}
else
{
Log.AppendEntry(" {0}[Failed to add]", foreignService);
}
}
}
Log.EndEntry();
break;
case MessageType.ServiceRemoved:
foreach (IStringifiable istring in msg.Data)
{
}
break;
case MessageType.EngineEvent:
// Engine events from foreign IEngineHubs.
foreach (IStringifiable iString in msg.Data)
{
if (iString is EngineEventArgs)
{
EngineEventArgs e = (EngineEventArgs)iString;
if (e.Status == EngineEventArgs.EventStatus.Request)
{ // Send this to a single hub
IService iService = null;
if (m_AppServices.TryGetService(e.EngineHubName, out iService) && iService is IEngineHub)
{
((IEngineHub)iService).HubEventEnqueue(e);
}
}
else
{ // Broadcast to all subscribed to this hub.
ForeignService fs;
if (foreignServer.TryGetService(e.EngineHubName, out fs) && (fs is IEngineHub))
{
e.EngineHubName = fs.ServiceName;
((IEngineHub)fs).OnEngineChanged(e);
}
}
}
}
break;
} //switch
} //ProcessConfirmMessage()
}//UpdatePeriodic()
//
//
#endregion// Hub Event Processing
#region Foreign Servers Connection & Disconnection
// *********************************************************
// **** Process Request Server Connect ****
// *********************************************************
/// <summary>
/// This processes the local request to connect to a foreign server via a socket.
/// Requirements:
/// Request.Data = {ForeignConnection,
/// </summary>
/// <param name="requestEventArg"></param>
private void ProcessRequestServerConnect(RequestEventArg <RequestCode> requestEventArg)
{
// Validate request
if (requestEventArg.Data == null || requestEventArg.Data.Count < 1)
{
Log.NewEntry(LogLevel.Warning, "ProcessServerConnect: Missing data.");
return;
}
if ((requestEventArg.Data[0] is ForeignConnection) == false)
{
Log.NewEntry(LogLevel.Warning, "ProcessServerConnect: Incorrect data.");
return;
}
// Extract the ip address & create a new foreign server object for this connection.
ForeignConnection conn = (ForeignConnection)requestEventArg.Data[0];
System.Net.IPAddress ipAddress;
if (string.IsNullOrEmpty(conn.IpAddress) || IPAddress.TryParse(conn.IpAddress, out ipAddress) == false)
{
ipAddress = System.Net.IPAddress.Loopback; // Connect locally if no address provided
}
int portid;
if (!int.TryParse(conn.Port, out portid))
{
Log.NewEntry(LogLevel.Warning, "ProcessServerConnect: Failed to extract port for connection. Failed to connection {0}.", conn);
return;
}
// On first connection attempt, we make a foreign server.
if (conn.Server == null)
{
conn.Server = new ForeignServer(this);
string baseTag = string.Empty;
if (m_AppServices.User != null)
{
baseTag = m_AppServices.User.ToString();
}
conn.Server.UniqueTag = ForeignServer.CreateUniqueTag(baseTag, DateTime.Now); // Upon first connection, we must create a unique tag.
}
// Connect foreign server
int conversationID;
if (m_Socket.TryConnect(ipAddress, portid, out conversationID))
{
ForeignServerConnect(conn.Server, conversationID);
// Send credentials.
SendMessage(conn.Server.ConversationId, GetMessage(MessageType.Credentials, MessageState.Request, conn.Server));
// Optionally load & send config files to foreign server.
if (string.IsNullOrEmpty(conn.m_ConfigFilename) == false)
{
string fn = string.Format("{0}{1}", m_AppServices.Info.UserConfigPath, conn.m_ConfigFilename);
string stringifiedObjects = null;
if (File.Exists(fn))
{
try
{
using (StreamReader sr = new StreamReader(fn))
{
stringifiedObjects = sr.ReadToEnd();
}
}
catch (Exception e)
{
Log.NewEntry(LogLevel.Warning, "Config file {0} failed to load. Exception {1}", fn, e.Message);
}
List <IStringifiable> nodes = null;
if (Stringifiable.TryCreate(stringifiedObjects, out nodes, true))
{
SendMessage(conn.Server.ConversationId, GetMessage(MessageType.CreateServices, MessageState.Request, nodes));
}
}
else
{
Log.NewEntry(LogLevel.Warning, "Config file cannot be found: {0}", fn);
}
}
}
else
{ // Failed to connect.
Log.NewEntry(LogLevel.Warning, "ProcessForeignServiceConnect: Failed to connect to {0}", conn.Server);
if (!m_ServersDisconnected.Contains(conn.Server))
{
m_ServersDisconnected.Add(conn.Server);
}
}
// Exit
m_Requests.Recycle(requestEventArg);;
}//ProcessForeignServiceConnect()
