/// <summary>
/// Processes an incoming message (using the MessageProcessor for deserialization)
/// </summary>
/// <param name="message">The message to be processed</param>
private void processMessage(ParsingResult message)
{
//parse the message
XElement xmlMessage;
RpcMessage msg = null;
var body = message.Payload.ToStringUTF8();
try
{
//try to parse it as XML
xmlMessage = XElement.Parse(body);
switch (xmlMessage.Name.LocalName.ToLower())
{
case "remotemethodcall":
msg = new RemoteMethodCall();
break;
case "remotemethodresponse":
msg = new RemoteMethodResponse();
break;
case "remoteerror":
msg = new RemoteError();
break;
}
if (!msg.Validate(xmlMessage))
{
logger.Error("Message from {0} could not be validated", this.Target);
var error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
msg.Deserialize(xmlMessage);
}
//Catch XmlException and wrap it into a format exception (makes catching errors in the caller easier)
catch (XmlException)
{
logger.Error("Could not parse message received from {0}", this.Target);
RemoteError error = new RemoteError(RemoteErrorCode.InvalidXmlError);
sendMessage(error);
return;
}
//encryption is mandatory if TrustLevel is 2 or higher
//if message was not encrypted it will result in a RemoteError and the connection will be reset
if (this.TrustLevel >= 2 && !message.WasEncrypted && !(msg is RemoteMethodCall && (msg as RemoteMethodCall).MethodName == CoreMethods.SendResetNotice))
{
RemoteError error = new RemoteError(RemoteErrorCode.EncryptionError);
if (msg.CallId != Guid.Empty)
{
error.CallId = msg.CallId;
}
error.ComponentName = "Authentication";
//The RemoteError will not be encrypted
WtlpClient.EncryptMessages = false;
sendMessage(error);
ResetConnection();
return;
}
if (msg is RemoteMethodCall)
{
//get the component responsible for handling the message
string componentName = (msg as RpcMessage).ComponentName;
var component = GetServerComponent(componentName);
if (component == null)
{
//no component to handle the request was found => send a RemoteError as response and return
RemoteError error = new RemoteError(RemoteErrorCode.ComponentNotFoundError);
error.CallId = (msg as RemoteMethodCall).CallId;
sendMessage(error);
return;
}
var processingTask = new Task(delegate
{
processRemoteMethodCall(msg as RemoteMethodCall, component);
});
processingTask.Start();
var heartBeatTask = new Task(delegate
{
var coreComponent = new CoreClientComponent();
coreComponent.ClientConnection = this;
while (!processingTask.IsCompleted)
{
Thread.Sleep(25000);
if (!processingTask.IsCompleted)
{
coreComponent.HeartbeatAsync();
}
}
});
heartBeatTask.Start();
}
else if (msg is RemoteMethodResponse)
{
processRemoteMethodResponse(msg as RemoteMethodResponse);
}
else if (msg is RemoteError)
{
processRemoteError(msg as RemoteError);
}
else
{
logger.Error("ProcessMessage() encoutered an unknown type of Message");
sendMessage(new RemoteError(RemoteErrorCode.UnknownMessage));
}
}
/// <summary>
/// Send a message to the target client
/// </summary>
/// <param name="msg">The message to process and send</param>
protected virtual void sendMessage(RpcMessage msg)
{
//if message is a RemoteMethodCall, it will be cached to be able to process response messages
if (msg is RemoteMethodCall)
{
RemoteMethodCall call = msg as RemoteMethodCall;
if (call.ResponseExpected)
{
unrepliedCalls.Add(call.CallId, call);
expectedResponseCount++;
timeoutTimer.Start();
}
}
//process the message using the MessageProcessor and pass the result to the ConnectionManager to send
try
{
this.WtlpClient.Send(msg.Serialize().ToString().GetBytesUTF8());
}
catch (WtlpException ex)
{
if (ex.Error == Result.Timeout)
throw new TimeoutException();
else
throw new RemoteErrorException();
}
}
