Re: How to get an operation Name in a Requstor Handler

[Bahman Kalali]

Thanks Vidyanand,

It works fine now. I was actually trying to implement this way, but I was
stuck. You helped me a lot. I really appreciate.

Again, thanks,

--Bahman

----- Original Message -----
From: "Vidyanand Murunikkara" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 06, 2002 3:20 PM
Subject: RE: How to get an operation Name in a Requstor Handler


Try this out Bahman


import org.apache.axis.handlers.BasicHandler;
import org.apache.axis.MessageContext;
import org.apache.axis.Message;
import org.apache.axis.AxisFault;
import org.apache.axis.description.ServiceDesc;
import org.apache.axis.description.OperationDesc;
import org.apache.axis.Handler;

import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPElement;
import javax.xml.soap.Name;

import java.util.Iterator;
import java.util.ArrayList;
import org.w3c.dom.Element;
import org.w3c.dom.Document;

public class MyHandler extends BasicHandler {

    public void invoke( MessageContext msgContext ) throws AxisFault {
        try {

            Message m = msgContext.getRequestMessage();
            SOAPEnvelope env = m.getSOAPEnvelope();
            SOAPBody body = env.getBody();
            Iterator iter = body.getChildElements();
            if( iter.hasNext()) {
                SOAPElement el = (SOAPElement) iter.next();
                Name opQName = el.getElementName();
                String opName = opQName.getLocalName();
                ServiceDesc service =
msgContext.getService().getServiceDescription();
                OperationDesc opDesc = getOperationDesc(service, opName
);
                System.out.println( "\n Operation Desc \n" + opDesc );
            }
        }catch( Exception e){
            throw new AxisFault(e.getMessage(), e);
        }
    }

    private OperationDesc getOperationDesc(ServiceDesc service , String
opName ){
        //ServiceDesc service =
msgContext.getService().getServiceDescription();
        if( service != null ) {
            ArrayList operations = service.getOperations();
            for( int i = 0; i < operations.size(); i++ ) {
                OperationDesc op = (OperationDesc)operations.get(i);
                if( op.getName().equals( opName))
     return op;
            }
        }
        return null;
    }
}

Vidyanand.

-----Original Message-----
From: Bahman Kalali [mailto:bkalali@;csg.uwaterloo.ca]
Sent: Wednesday, November 06, 2002 11:47 AM
To: [EMAIL PROTECTED]
Subject: How to get an operation Name in a Requstor Handler



----- Original Message -----
From: Bahman  <mailto:bkalali@;csg.uwaterloo.ca> Kalali
To: [EMAIL PROTECTED] <mailto:axis-user@;xml.apache.org>
Sent: Wednesday, November 06, 2002 2:23 PM
Subject: Re: How to get an operation Name in a Requstor Handler

Thanks Bobby,

I had even tried that one, but I got the same error
message(java.lang.NullPointerException)

I just read an APIdocs of OperationDesc, I guess there is something
wrong with OperationDesc.

http://www.cs.unc.edu/Courses/comp190/docs/documentation/axis/apiDocs/or
g/apache/axis/description/OperationDesc.html
<http://www.cs.unc.edu/Courses/comp190/docs/documentation/axis/apiDocs/o
rg/apache/axis/description/OperationDesc.html>

I am using

xml-Axis-1.0 Release Oct 7, 2002
JDK1.3.1_04
Tomcat4.1

--Bahman


----- Original Message -----
From: Bobby Carp <mailto:bobby.carp@;blackpearl.com>
To: '[EMAIL PROTECTED]' <mailto:'[EMAIL PROTECTED]'>
Sent: Wednesday, November 06, 2002 1:43 PM
Subject: RE: How to get an operation Name in a Requstor Handler


OperationDesc oper = msgCxt.getOperation();

oper.getName();

-----Original Message-----
From: Bahman Kalali [mailto:bkalali@;csg.uwaterloo.ca]
Sent: Wednesday, November 06, 2002 9:58 AM
To: [EMAIL PROTECTED] <mailto:axis-user@;xml.apache.org>
Subject: How to get an operation Name in a Requstor Handler



I am trying to write a Service requestor Handler. Inside the Handler's
invoke method, I want to get the method name of service provider:

I can get an operation name from a MessageContext as follows.
public void invoke(MessageContext msgContext) throws AxisFault

{

Handler serviceHandler = msgContext.getService();



Message msg=msgContext.getRequestMessage();



SOAPEnvelope envelope=msg.getSOAPEnvelope();

Element envElement=envelope.getAsDOM();

Document doc= envelope.getAsDocument();

String operationName=mygetOperation(doc);

}

Is there any other way that I can get an operation name and its expected
passing parameters in my Handlers from a MessageContext?



I tried this, but it gives me NULL pointer exception error.

OperationDesc op =msgContext.getOperation();



Method t= op.getMethod();

System.out.println(t.getName())===>java.lang.NullPointerException



I really appreciate your input.

--Bahman