/// <summary>
/// Will be called whenever a message has been received. No matter if request, response, event, or event reply ...
///
/// Starts a new thread to handle the message
/// </summary>
/// <param name="msg"></param>
public static void MessageReceived(ChannelMessage msg)
{
SingleMessageHandler mh = new SingleMessageHandler(msg);
Thread t = new Thread(new ThreadStart(mh.HandleMessage));
t.IsBackground=true;
t.Start();
}
public void HandleIncomingMessage(ChannelMessage msg)
{
ITransportHeaders responseHeaders;
Stream responseStream;
IMessage responseMsg;
ServerChannelSinkStack stack = new ServerChannelSinkStack();
stack.Push(this,msg);
ServerProcessing proc = _nextSink.ProcessMessage(stack,null,msg.Headers,msg.Body,out responseMsg, out responseHeaders,out responseStream);
// check the return value.
switch (proc)
{
// this message has been handled synchronously
case ServerProcessing.Complete:
// send a response message
ChannelMessage reply = new ChannelMessage(msg.From,msg.ID,responseHeaders,responseStream);
ConnectionManager.SendMessage(reply);
break;
// this message has been handled asynchronously
case ServerProcessing.Async:
// nothing needs to be done yet
break;
// it's been a one way message
case ServerProcessing.OneWay:
// nothing needs to be done yet
break;
}
}
/*
public void StartListening()
{
ConnectionManager.StartListening(_port);
}
*/
public void AsyncProcessResponse(
IServerResponseChannelSinkStack sinkStack, object state,
IMessage msg, ITransportHeaders headers, System.IO.Stream stream)
{
ChannelMessage req = (ChannelMessage) state;
ChannelMessage reply = new ChannelMessage(req.From,req.ID,headers,stream);
ConnectionManager.SendMessage(reply);
}
/// <summary>
/// read the message incoming from a socket
/// </summary>
/// <param name="sock"></param>
public static ChannelMessage ReadFromSocket(Socket sock, int port)
{
BinaryFormatter fmt = new BinaryFormatter();
ChannelMessage msg = new ChannelMessage();
// read the lead-in (16 bytes)
byte[] buf = new Byte[16];
sock.Receive(buf,16,SocketFlags.None);
MemoryStream lead = new MemoryStream(buf);
BinaryReader leadrdr = new BinaryReader(lead);
// read the number of header bytes
int headerlen = (int) leadrdr.ReadInt64();
// read the number of body bytes
int bodylen = (int) leadrdr.ReadInt64();
// get header & body
byte[] headerbytes = new Byte[headerlen];
sock.Receive(headerbytes,0,headerlen,SocketFlags.None);
byte[] bodybytes = new Byte[bodylen];
sock.Receive(bodybytes,0,bodylen,SocketFlags.None);
// layer first memorystream
MemoryStream head = new MemoryStream(headerbytes,0,headerlen,false);
// layer body stream
MemoryStream body = new MemoryStream(bodybytes,0,bodylen,false);
msg.Headers = (ITransportHeaders) fmt.Deserialize(head);
msg.ID = (Guid) msg.Headers["Id"];
msg.InReplyTo = (Guid) msg.Headers["InReplyTo"];
msg.From = (String) msg.Headers["From"];
// IPEndPoint ipe = (IPEndPoint) sock.LocalEndPoint;
msg.To = (String) msg.Headers["To"];
msg.SecondaryGuessTo = Helper.GetIPAddress() + ":" + port;
body.Seek(0,SeekOrigin.Begin);
msg.Body = body;
return msg;
}
public void AsyncProcessRequest(IClientChannelSinkStack sinkStack,
IMessage msg, ITransportHeaders headers, Stream stream)
{
String objectURI;
// check the URL
String URL = (String) msg.Properties["__Uri"];
String baseurl = Helper.ParseURL(URL,out objectURI);
if (baseurl == null)
{
objectURI = URL;
}
headers["__RequestUri"] = objectURI;
// transfer it
ChannelMessage req;
if (URL.ToLower().StartsWith(Helper.TCP_PREFIX))
{
req = new ChannelMessage(_hostname.ToLower() + ":" + _port,headers,stream);
}
else
{
req = new ChannelMessage(_GUID,headers,stream);
}
AsyncResponseHandler hdl = new AsyncResponseHandler(sinkStack);
MessageHandler.RegisterAsyncResponseHandler(req.ID,hdl);
ConnectionManager.SendMessage(req);
}
public void ProcessMessage(IMessage msg,
ITransportHeaders requestHeaders, Stream requestStream,
out ITransportHeaders responseHeaders,
out Stream responseStream)
{
String objectURI;
// check the URL
String URL = (String) msg.Properties["__Uri"];
String baseurl = Helper.ParseURL(URL,out objectURI);
if (baseurl == null)
{
objectURI = URL;
if (_hostname == null)
{
URL = Helper.TCPGUID_PREFIX + _GUID + objectURI;
}
}
requestHeaders["__RequestUri"] = objectURI;
// transfer it
ChannelMessage req;
if (URL.ToLower().StartsWith(Helper.TCP_PREFIX))
{
req = new ChannelMessage(_hostname.ToLower() + ":" + _port,requestHeaders,requestStream);
}
else
{
req = new ChannelMessage(_GUID,requestHeaders,requestStream);
}
AutoResetEvent evt = new AutoResetEvent(false);
MessageHandler.RegisterAutoResetEvent(req.ID,evt);
ConnectionManager.SendMessage(req);
ChannelMessage resp = MessageHandler.WaitAndGetResponseMessage(req.ID, evt);
responseHeaders = resp.Headers;
responseStream = resp.Body;
}
internal SingleMessageHandler(ChannelMessage incomingMessage)
{
msg = incomingMessage;
}
internal void HandleAsyncResponseMsg(ChannelMessage msg)
{
_sinkStack.AsyncProcessResponse(msg.Headers,msg.Body);
}
/// <summary>
/// Sends a message. Looks for the necessary connection. If none exists, a new one will be built
/// </summary>
/// <param name="msg"></param>
public static void SendMessage(ChannelMessage msg)
{
Connection conn = (Connection) ConnByReceiver[msg.To];
if (conn == null)
{
String host;
int port;
msg.SplitReceiver(out host, out port);
if (host == null)
{
// message is directed at a GUID but no connection found
// TODO: wait some seconds and retry. Maybe the client reconnects.
Console.WriteLine("Message is directed at a GUID but no connection found");
throw new Exception("Message is directed at a GUID but no connection found");
}
conn = new Connection(host,port);
conn.Connect();
ConnByReceiver[msg.To] = conn;
}
conn.SendMessage(msg);
}