Re: [OT, Q] Fast RPC library?

[Richard Frith-Macdonald]

On 2005-10-23 03:11:33 +0100 Sungjin Chun <chunsj@embian.com> wrote:

> On Oct 23, 2005, at 12:25 AM, Richard Frith-Macdonald wrote:
> > Using XML-RPC (GSXMLRPC from the GNustep base library) I have done  high 
> > speed stuff on a P4.
> > Not sure what you mean by 10K/sec though ... is that data  throughput or 
> > number of RPCs?
> > If it's number of RPCs, you need to say how many parameters etc you  are 
> > passing and how big they are etc.
>
> It's number of RPCs. I did not tested my server on P4(which will be  faster 
> than my iBook G4). # of Request parameter is under 3 (mostly)  and response 
> data size is under 512K (mostly also :-).

It seems to me that a 10K RPC/sec target is high for any machine.

> As far as I know GSXMLRPC does not support server, right? And I found  that 
> GSXMLRPC client code is one of the fastest client library. (For  my  test 
> server it's faster than xmlrpc-c).

GSXMLRPC is fine as a server (ie to parse RPCs and generate responses).  It 
doesn't act as a web-server in itsself....but you can use any other web 
server to run a GSXMLRPC service.  The GNUstep SQLClient library (in the 
dev-libs directory) contains the WebServer class, which can be used to act 
as a standalone web server, with the xmlrpc handling done by its delegate 
...

- (BOOL) processRequest: (GSMimeDocument*)request
               response: (GSMimeDocument*)response
                    for: (WebServer*)http
{
  static GSXMLRPC       *xmlrpc = nil;
  NSString              *error = nil;
  NSString              *method = nil;
  NSMutableArray    *params;
  id                            out;

  if (xmlrpc == nil)
    {
      xmlrpc = [GSXMLRPC new];
    }

  NS_DURING
    {
      data = [request convertToData];
      method = [xmlrpc parseMethod: data params: params];
    }
  NS_HANDLER
    {
      error = [NSString stringWithFormat: @"Bad XMLRPC data - %@",
        [localException description]];
    }
  NS_ENDHANDLER

  // Handle RPC here

  if (errror == nil)
    {
      out = [xmlrpc buildResponseWithParams: objectToReturn];
    }
  else
    {
      out = [xmlrpc buildResponseWithFaultCode: errorCode andString: error];
    }
  out = [out dataUsingEncoding: NSASCIIStringEncoding];

  [response setContent: out type: @"text/xml"];
  [response setHeader: @"http"
                value: @"HTTP/1.1 200 Success"
           parameters: nil];
  return YES;
}