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Message-ID: <000a01c1c269$f1c9e6a0$8f60f984@sdsc.edu>
From: "Frank van Lingen" <fvlingen@sdsc.edu>
To: <axis-user@xml.apache.org>
Cc: <fvlingen@sdsc.edu>
Subject: bean serialization problem. Receiving null values on client side
Date: Sat, 2 Mar 2002 20:14:39 -0800
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Hi,

I am trying to build a simple example using bean serialization, based on =
the examples from Axis. I want to transfer two values of type String =
from my service to my client using an object that contains two strings. =
However my client receives only objects with null values.

The following object is used for transfer:

public class MyStartNowTransferObject
{
      protected String S1;
      protected String S2;

      public MyStartNowTransferObject()
      {
      }

      public MyStartNowTransferObject(String a, String b)
      {
       S1=3Da;
       S2=3Db;
      }
      .......+ some get and set methods
}

At the service side I have this method:

public MyStartNowTransferObject getStrings()
    {
     MyStartNowTransferObject TO=3Dnew MyStartNowTransferObject(S1,S2);
     // S1 and S2 are public static strings of the service side object
     return TO;
    }

My wsdd file looks like this:

<deployment xmlns=3D"http://xml.apache.org/axis/wsdd/"
            =
xmlns:java=3D"http://xml.apache.org/axis/wsdd/providers/java">

 <service name=3D"MyStartNowService" provider=3D"java:RPC">
  <parameter name=3D"className" =
value=3D"samples.userguide.MyStartNow.MyStartNowService"/>
  <parameter name=3D"methodName" value=3D"*"/>

 <beanMapping qname=3D"myNs:MyStartNowTransferObject"=20
               xmlns:myNs=3D"MyStartNowService"
              =
languageSpecificType=3D"java:samples.userguide.MyStartNow.MyStartNowTrans=
ferObject"/>

 </service>
 </deployment>

The client side has the following piece of code to get a =
MyStartNowTransferObject. This code is based on example5 of the =
userguide and the bid example of Axis.

public static MyStartNowTransferObject getStrings(String endpointURL) =
throws Exception
   =20
    {
        Service  service =3D new Service();
        Call     call    =3D (Call) service.createCall();
               call.setTargetEndpointAddress( new =
java.net.URL(endpointURL) );
              =20
        QName    qn      =3D new QName( "MyStartNowService", =
"MyStartNowTransferObject" );=20
     =20
        Class cls =3D MyStartNowTransferObject.class;
        call.addSerializer(cls, qn, new BeanSerializer(cls));=20
               call.addDeserializerFactory(qn, cls, =
BeanSerializer.getFactory());=20
      =20
        call.setOperationName( "getStrings" );=20
        call.setProperty( Call.NAMESPACE, "MyStartNowService" );
               MyStartNowTransferObject result =3D =
(MyStartNowTransferObject) call.invoke( new Object[] {} );

        return result;
    }


Everything works, except that the string values of the =
MyStartNowTransferObject on the client side have value null after the =
service is invoked, while I know that when the getStrings method is =
invoked on the serverside, the MyStartNowTransferObject created on the =
serverside has the required not null values.

I also have some methods on the clientside that do get and sets on the =
server side using strings (so not serialization). This works fine.

Is there anybody with similar problem or has a solution?

Frank van Lingen

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4616.200" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff><FONT face=3DArial size=3D2>
<DIV>Hi,</DIV>
<DIV>&nbsp;</DIV>
<DIV>I am trying to build a simple example using bean serialization, =
based on=20
the examples from Axis. I want to transfer two values of type String =
from my=20
service to my client using an object that contains two strings. However =
my=20
client receives only objects with null values.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The following object is used for transfer:</DIV>
<DIV>&nbsp;</DIV>
<DIV>public class=20
MyStartNowTransferObject<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
protected String=20
S1;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; protected String S2;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; public=20
MyStartNowTransferObject()<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; public =
MyStartNowTransferObject(String a,=20
String b)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
S1=3Da;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
S2=3Db;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
}<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
.......+ some get and set methods<BR>}</DIV>
<DIV>&nbsp;</DIV>
<DIV>At the service side I have this method:</DIV>
<DIV>&nbsp;</DIV>
<DIV>public MyStartNowTransferObject getStrings()<BR>&nbsp;&nbsp;&nbsp;=20
{<BR>&nbsp;&nbsp;&nbsp;&nbsp; MyStartNowTransferObject TO=3Dnew=20
MyStartNowTransferObject(S1,S2);<BR>&nbsp;&nbsp;&nbsp;&nbsp; // S1 and =
S2 are=20
public static strings of the service side =
object<BR>&nbsp;&nbsp;&nbsp;&nbsp;=20
return TO;<BR>&nbsp;&nbsp;&nbsp; }</DIV>
<DIV>&nbsp;</DIV>
<DIV>My wsdd file looks like this:</DIV>
<DIV>&nbsp;</DIV>
<DIV>&lt;deployment xmlns=3D"<A=20
href=3D"http://xml.apache.org/axis/wsdd/">http://xml.apache.org/axis/wsdd=
/</A>"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;=20
xmlns:java=3D"<A=20
href=3D"http://xml.apache.org/axis/wsdd/providers/java">http://xml.apache=
.org/axis/wsdd/providers/java</A>"&gt;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&lt;service name=3D"MyStartNowService"=20
provider=3D"java:RPC"&gt;<BR>&nbsp; &lt;parameter name=3D"className"=20
value=3D"samples.userguide.MyStartNow.MyStartNowService"/&gt;<BR>&nbsp;=20
&lt;parameter name=3D"methodName" value=3D"*"/&gt;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&lt;beanMapping qname=3D"myNs:MyStartNowTransferObject"=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;=20
xmlns:myNs=3D"MyStartNowService"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;languageSpecificType=3D"ja=
va:samples.userguide.MyStartNow.MyStartNowTransferObject"/&gt;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&lt;/service&gt;<BR>&nbsp;&lt;/deployment&gt;</DIV>
<DIV>&nbsp;</DIV>
<DIV>The client side has the following piece of code to get a=20
MyStartNowTransferObject. This code is based on example5 of the =
userguide and=20
the bid example of Axis.</DIV>
<DIV>&nbsp;</DIV>
<DIV>public static MyStartNowTransferObject getStrings(String =
endpointURL)=20
throws Exception<BR>&nbsp;&nbsp;&nbsp; <BR>&nbsp;&nbsp;&nbsp;=20
{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Service&nbsp; service =
=3D new=20
Service();<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
Call&nbsp;&nbsp;&nbsp;&nbsp; call&nbsp;&nbsp;&nbsp; =3D (Call)=20
service.createCall();<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
call.setTargetEndpointAddress( new java.net.URL(endpointURL)=20
);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; QName&nbsp;&nbsp;&nbsp;=20
qn&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =3D new QName( "MyStartNowService",=20
"MyStartNowTransferObject" ); <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Class cls =3D=20
MyStartNowTransferObject.class;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;=20
call.addSerializer(cls, qn, new BeanSerializer(cls));=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;=20
call.addDeserializerFactory(qn, cls, BeanSerializer.getFactory());=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; call.setOperationName(=20
"getStrings" ); <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
call.setProperty(=20
Call.NAMESPACE, "MyStartNowService"=20
);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;=20
MyStartNowTransferObject result =3D (MyStartNowTransferObject) =
call.invoke( new=20
Object[] {} );</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return=20
result;<BR>&nbsp;&nbsp;&nbsp; }</DIV>
<DIV>&nbsp;</DIV>
<DIV><BR>Everything works, except that the string values of the=20
MyStartNowTransferObject on the client side have value null after the =
service is=20
invoked, while I know that when the getStrings method is invoked on the=20
serverside, the MyStartNowTransferObject created on the serverside has =
the=20
required not null values.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I also have some methods on the clientside that do get and sets on =
the=20
server side using strings (so not serialization). This works fine.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Is there anybody with similar problem or has a solution?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Frank van Lingen</FONT></DIV></BODY></HTML>

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