NullpointerException in Axis

[robisz]

I'm trying to access a remote web service from a session bean.
I have followed the instructions in this Wiki page:
http://www.jboss.org/wiki/Wiki.jsp?page=WSClientEJB

Service lookup from JNDI is successful and I can obtain the web service
port, but when I invoke a method on the service endpoint interface I get
the following exception:

2004-10-04 13:24:59,868 ERROR [org.jboss.webservice.client.PortProxy] Port error
java.lang.NullPointerException
 at org.apache.axis.client.AxisClientProxy.proxyParams2CallParams(AxisClientProxy.java:130)
 at org.apache.axis.client.AxisClientProxy.invoke(AxisClientProxy.java:249)
 at $Proxy284.getPresence(Unknown Source)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:324)
 at org.jboss.webservice.client.PortProxy.invoke(PortProxy.java:93)
 at $Proxy284.getPresence(Unknown Source)
 ....

Does anyone know what to do?

[thomas.diesler]

Yes, it seems the wsdl is in document/literal style.
I want to access a remote webservice and the wsdl comes from
an external source... Does it means I won't be able to use it?

[thomas.diesler]

what version of jboss?

[robisz]

4.0 final

[yaaarrrgg]

i had some problems with web services in 4.0 as well. i used the wsdl2java pluing from myspotter.com. jboss seems to be missing an axis config file?

http://sourceforge.net/tracker/index.php?func=detail&aid=1038708&group_id=22866&atid=376685

-ks

[robisz]

Yes, it seems the wsdl is in document/literal style.
I want to access a remote webservice and the wsdl comes from
an external source... Does it means I won't be able to use it?

[thomas.diesler]

I'm seeing the same issue when connecting to www.sforce.com's document/literal services. It's prio one of my todos.

[thomas.diesler]

BTW, is your service public? Can you provide a test and file an issue on sourceforge?

[robisz]

I'm sorry, my service is not public... but I've maked a small sample
application and I'm perceiving very strange things...

I've maked this SEI:

package sample.ws;

public interface SampleEndpoint extends java.rmi.Remote {
 public String changeSalary(UserType user, Integer amount) throws java.rmi.RemoteException;
}

The implementation class:

public class SampleEndpointImpl implements SampleEndpoint {

 public String changeSalary(UserType user, Integer amount)
 throws RemoteException {
 return "Hello " + user.getFirstName() + " " + user.getLastName()
 +"! Your salary is: " + amount;
 }

}

I've created a sample servlet wich calls this webservice method and
displays the result string.

I've generated the wsdl in three ways (with axis Java2WSDL):
1. rpc/literal (with --style RPC)
2. document/literal (with --style DOCUMENT)
3. document/literal wrapped (with --style WRAPPED)

In every cases I get different results...

1. rpc/literal
Everything seems fine. With this method call in servlet...

UserType user = new UserType();
 user.setFirstName("John");
 user.setLastName("Smith");

 String info = endpoint.changeSalary(user, new Integer(5000));

...I'm getting correct result:

Hello John Smith! Your salary is: 5000

2. document/literal
In this case I'm getting the following result:

Hello John Smith! Your salary is: null

It seems all parameters except the first will be null in this case.
I think this is a bug.

3. document/literal wrapped
In this case I'm getting NullPointerExcpetion as above in my first post.
Messages in wsdl contain only one part, although my EIS method has two
parameters, but I think it's normal in wrapped style.

Unfortunately my service's wsdl belongs to the 3rd category...

I've posted a bug report contains my sample application.

Robisz

[thomas.diesler]

The wrapped style is not allowed by the BasicProfile. Try generating your wsdl/jaxrpc-mapping.xml with jwsdp-1.4 wscompile.

[dsosnoski]

If you're referring to the WS-I Basic Profile, wrapped style most certainly is allowed - wrapped is just a set of conventions for one way of structuring doc/lit based on method call definitions.

- Dennis

Dennis M. Sosnoski
Enterprise Java, XML, and Web Services Support
http://www.sosnoski.com
Redmond, WA 425.885.7197

[thomas.diesler]

Denis says:

If you're referring to the WS-I Basic Profile, wrapped style most certainly is allowed - wrapped is just a set of conventions for one way of structuring doc/lit based on method call definitions.

- Dennis

Dennis M. Sosnoski
Enterprise Java, XML, and Web Services Support http://www.sosnoski.com Redmond, WA 425.885.7197

[robisz]

Your comment is not visible, please respost it.
I wonder about the latest developments :-)

Thx
robisz

[robisz]

Excuse me for reposting the question but I haven't got any
answer yet.
Is document/literal-wrapped supported by J2EE 1.4 or not?
In doc/lit style could my SEI methods have more than one arguments?

I think the answer is yes, but it doesn't work in JBoss...

Does anybody know whats the truth about it?

Thx

[thomas.diesler]

> Is document/literal-wrapped supported by J2EE 1.4 or not?

It is not covered by J2EE spec, JBossWS does not support it.

> In doc/lit style could my SEI methods have more than one arguments?

This is poorly supported in Axis, which JBossWS still uses internally. In jboss-4.0.1 there will probably be better support for it. Until then, you should use wrapper objects for multiple parameters.

The jboss-4.0.1 release is scheduled for next week.