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Posted to users@ws.apache.org by bagas <ba...@indoartha.co.id> on 2004/03/19 07:49:25 UTC
[Newbie Quetion] How can I check my RPC return value
Dear All,
I am building a XML-RPC Server using org.apache.xmlrpc.WebServer.
I now encounter a problem; the problem is how can I track my response
(result).
Here is an example :
Suppose I have a Class =
Public class AServer implements XmlRpcHandler
{
WebServer serv;
public static void main(String [] args)
{
Aserver(100);
}
public AServer(int i)
{
serv = Webserver(i);
serv.addHandler("$default", this);
}
public Object execute(String method, Vector params)
{
//do something
return something;
}
}
after AServer running ... there are 3 message coming ...
then the server send a response (result of the method) right ??
My question is how can I track the response (result) of the message if I
urgently needed to know whether the response (result) is sent or fail to
be sent.
Thank you very much .
Re: [Newbie Quetion] How can I check my RPC return value
Posted by Dave Stewart <ds...@aquaflo.com>.
Hi Bagas!
(Caution: I'm not any certified expert in any way, just played with
this myself a bit ...)
I'm not sure I'm following your question, but I'll give it a shot
anyway ...
On Mar 18, 2004, at 10:49 PM, bagas wrote:
> Dear All,
>
> I am building a XML-RPC Server using org.apache.xmlrpc.WebServer.
> I now encounter a problem; the problem is how can I track my response
> (result).
>
> Here is an example :
>
> Suppose I have a Class =
>
> Public class AServer implements XmlRpcHandler
> {
> WebServer serv;
>
> public static void main(String [] args)
> {
> Aserver(100);
> }
>
> public AServer(int i)
> {
> serv = Webserver(i);
> serv.addHandler("$default", this);
> }
>
> public Object execute(String method, Vector params)
> {
> //do something
> return something;
> }
> }
>
> after AServer running ….. there are 3 message coming …..
Um, clarification here ... you mean you've called execute with a method
name and 3 arguments in params, right?
>
> then the server send a response (result of the method) right ??
According to the documentation, execute() should either return a result
*OR THROW AN EXCEPTION*. The result will be a java.lang.Object unless
something went wrong, in which case it will throw a java.lang.Exception
that will need to be caught somewhere.
>
>
>
> My question is how can I track the response (result) of the message if
> I urgently needed to know whether the response (result) is sent or
> fail to be sent.
Well, how is your server (AServer) dealing with it? You could either be
trapping the exception with a try/catch block or passing it back to the
caller (the class that invoked execute() and sent 3 messages in
params).
Maybe that's the hint you need, the documentation for the interface
XmlRpcHandler specifies that the execute() method will either return a
result (as a java.lang.Object) or will throw an exception (specifically
a java.lang.Exception). If the result was sent, it will be in the
Object returned. If it failed, details will be in the Exception.
If you are trapping that Exception in AServer itself, then I would
suggest creating an Object that you could return that will be
recognized as a problem and testing for that in the calling method. If
you are passing the Exception back to the invoker (which is what I
would do), then I don't get the question since it should be obvious if
it worked or not (you'll either get an Object back or you'll catch an
Exception, which kind of answers the question doesn't it?)
>
>
>
> Thank you very much …
I just hope I've been of some help. ;-)
Dave Stewart
Aqua~Flo Supply (Goleta CA)
dstewart at aquaflo dot com
Law of Probability Dispersal:
Whatever it is that hits the fan
will not be evenly distributed.