Unable to receive result from Web Service Method

[Aniket Patil]

I have a simple Axis client through which I am trying to access an Axis web service. The Axis client is

 
package samples.userguide.example4;
 
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.utils.Options;
import org.apache.axis.encoding.XMLType;
import javax.xml.rpc.ParameterMode;
 
import javax.xml.namespace.QName;
 
public class Monitor
{
    public static void main(String [] args)
    {
        try {
            Options options = new Options(args);
            
            String endpointURL = options.getURL();
            
            Service  service = new Service();
            Call     call    = (Call) service.createCall();
 
           call.setTargetEndpointAddress( new java.net.URL(endpointURL) );
           call.setOperationName( new QName("LogTestService", "setDelay") );
call.addParameter("op1", XMLType.XSD_INTEGER, ParameterMode.IN);
call.setReturnType(XMLType.XSD_STRING);
 
        while(true){
 
double i = Math.random();
 
System.out.println("Random number is "+(int)(i*10));
Thread.sleep(2);
Integer obj = new Integer((int)(i*10));
System.out.println("Value in object is "+obj.intValue());
 
String res = (String)call.invoke( new Object[] {obj} );
System.out.println( res );
   }
            //System.out.println( res );
        } catch (Exception e) {
            System.err.println(e.toString());
        }
    }
}

The Axis Web service is

  
package samples.userguide.example4;
 
public class Service
{
    private int delay = 0;
 
public String testMethod()
    {
        try
        {
System.out.println("Sleeping for "+delay+" seconds");
Thread.sleep(delay);
        }
        catch (InterruptedException e)
        {
e.printStackTrace();
        }
return "Hi, you've reached the testMethod," + " delay is" + delay;
    }
 
public String setDelay(Integer delay)
{
this.delay = delay.intValue();
return "delay set to "+delay;
}
}

I get the following output:

java samples.userguide.example4.Monitor -lhttp://localhost:8080/axis/services/LogTestService
Random number is 5
Value in object is 5
null
Random number is 4
Value in object is 4
null
.....
I am not able to receive the result after invoking the web service method setDelay (output is null). Why is this so?
[ November 27, 2007: Message edited by: Aniket Patil ]

[Peer Reynders]

Use TCPMon (Tutorial) to have a look at the request and response - that may help to shed some light on what is going on. It�s included with Axis.

However you will run into an entirely different problem. Axis creates a new service instance for each incoming call. So even if you manage to set the delay, it won't "remember" it the next time you call a web method because you are dealing with a new, separate service instance. Web services are supposed to be stateless.