public ServerProcessing ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)
{
if (requestMsg != null)
{
// the message has already been deserialized so delegate to the next sink
return(_nextSink.ProcessMessage(
sinkStack,
requestMsg, requestHeaders, requestStream,
out responseMsg, out responseHeaders, out responseStream));
}
// parameters validation
if (sinkStack == null)
{
throw new ArgumentNullException("sinkStack");
}
if (requestHeaders == null)
{
throw new ArgumentNullException("requestHeaders");
}
if (requestStream == null)
{
throw new ArgumentNullException("requestStream");
}
// deserialize request
IMethodCallMessage methodCall = _formatter.DeserializeRequest(requestHeaders, requestStream);
requestStream.Close();
// prepare stack for request processing
sinkStack.Push(this, null);
// process request
ServerProcessing processing;
IMethodReturnMessage methodReturn = null;
try
{
// call next sink to dispatch method call
processing = _nextSink.ProcessMessage(
sinkStack,
methodCall, requestHeaders, null,
out responseMsg, out responseHeaders, out responseStream);
if (processing == ServerProcessing.Complete)
{
// response headers and stream must be null at this point!
if (responseHeaders != null)
{
throw new NotSupportedException();
}
if (responseStream != null)
{
throw new NotSupportedException();
}
// check response
methodReturn = responseMsg as IMethodReturnMessage;
if (methodReturn == null)
{
throw new NotSupportedException();
}
}
}
catch (Exception ex)
{
processing = ServerProcessing.Complete;
methodReturn = new ReturnMessage(ex, methodCall);
responseMsg = methodReturn;
responseHeaders = null;
responseStream = null;
}
// handle response
switch (processing)
{
case ServerProcessing.Complete:
{
// call proceeded synchronously - serialize response
sinkStack.Pop(this);
SerializeResponse(sinkStack, methodReturn, out responseHeaders, out responseStream);
break;
}
case ServerProcessing.OneWay:
{
// no response needed
sinkStack.Pop(this);
break;
}
case ServerProcessing.Async:
{
// call proceeded asynchronously
sinkStack.Store(this, null);
break;
}
default:
throw new NotSupportedException();
}
return(processing);
}
