response time testing [urgent]

[Jia YU]

I set up a web services with soap2.2.

I want to time the response time on client sides. I wrote a loop to send
request 10 times to the Web services. the first one is very long others
are very short. if I start program again the result is same, first one
is long but others are short.

I attached the program pls help why? Do you have any idea how to do
timing for web services? 

I also time the myrpc.invoke() the result is same first time is long
others short.

What can cause this problem? some wrong with my program? I knew the
webservice use http service. it may have sock connection setup on the
first time, but my question is I create new soap connection everytime in
the loop,why the time is short after first query and why if I run new
program again the first time become very long too. how can http server
know it is different program rather than different soap call.


Please help!!!



***This is my test program
                String sName=commandLine.getFlagArg("-serviceName");

                GMDQuery g=null;
                long time=0;
                for(int i=0;i<10;i++){
                try{
                        //create a class which is for soap query (code is below)
                        g=new
                        
GMDQuery(gmdHost,Integer.parseInt(port),soapDir,soapServiceName); 
                        Price p=null;
                        long st=System.currentTimeMillis();   //start
time
                        p=g.getPrice(sName.trim());
                        long ft=System.currentTimeMillis();   //finish
time
                        time=(ft-st)+time;
                        System.out.println("Done: "+ (ft-st));
                        System.out.println(p.toString());
                        }catch(GMDQueryException e){
                                System.err.println(e.getMessage());
                                System.exit(2);
                        }

                        }//for

***My query class

                public class GMDQuery {
                        Call myrpc;
                        String servicePoint;
                
                        public GMDQuery(String host, int port, String soapDir, String
soapServiceName) throws GMDQueryException{
                                Properties props = new Properties();
           
                                
servicePoint="http://"+host+":"+String.valueOf(port)+soapDir;
                                System.out.println("Current GMD is on 
"+servicePoint+"\n");

                                myrpc = new Call();
                              myrpc.setTargetObjectURI(soapServiceName);
                        }

                        public Price getPrice(String sName) throws GMDQueryException{
                                Element QueryPriceRoot=new Element("QUERY-PRICE");
                                QueryPriceRoot.addContent(new
Element("SERVICE_NAME").setText(sName));
                                Document QueryPrice=new Document(QueryPriceRoot);
                                XMLOutputter outputter=new XMLOutputter(" ",true);
                                String outReq=outputter.outputString(QueryPrice);

                                //for looking at xml message
                                //System.out.println(outReq);

                                myrpc.setMethodName("queryPrice");

                                String rxml=null;
                                try{
                                         rxml=executeSOAPQuery(outReq);
                                        }catch(GMDQueryException e){
                                         throw e;
                                 }
                                        ......
                                 return new Price(hPrice,sPrice);
                        }
                        
                                private String executeSOAPQuery(String outReq) throws
GMDQueryException{

               
                                
myrpc.setEncodingStyleURI("http://schemas.xmlsoap.org/soap/encoding/";);

                //Create a URL object, which represents the endpoint
                URL url=null;

                try{
                        url=new URL(servicePoint);
                }catch(java.net.MalformedURLException e){
                        throw new GMDQueryException(e.getMessage());
                }

                // Add Parameters
            if(!outReq.equals("")){
                        Vector myparams = new Vector(1);
                        myparams.addElement(new Parameter("inputReq",
String.class, outReq,null));
                        myrpc.setParams(myparams);
            }

                //Send the SOAP RPC request message using invoke()
method
                Response resp=null;

                try{
                        resp=myrpc.invoke(url," ");
                }catch(org.apache.soap.SOAPException e){
                        throw new GMDQueryException("connection error");
                }

                //Check the response.
                Parameter result=null;

                if(resp.generatedFault()){    //Error Occured
                        Fault fault=resp.getFault();
                        throw new GMDQueryException("GMD
Error:"+fault.getFaultString());
                }else {
                         result=resp.getReturnValue();
                }
                return result.getValue().toString();
        }