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Posted to user@tuscany.apache.org by Dzmitry Rakavets <Dz...@epam.com> on 2008/12/02 17:57:17 UTC
Problem with Tuscany calling an AXIS2 web service
Hello,
I'm trying to investigate Tuscany possibilities to work with external web services (for example, provided by AXIS).
I created a very simple AXIS2 web service, which is deployed as POJO on Tomcat. Here is the interface it provides:
public interface DemoService {
public void voidMethod();
public void voidMethodWithParams(int param1, String param2, BigDecimal param3);
public String echoMethod(String value);
public String paramStructureMethod(samples.quickstart.service.pojo.DemoParamStructure structure);
public samples.quickstart.service.pojo.DemoParamStructure resultStructureMethod(int param1, String param2, BigDecimal param3);
}
samples.quickstart.service.pojo.DemoParamStructure is a simple java bean:
public class DemoParamStructure {
private int integerParam;
private String stringParam;
private BigDecimal decimalParam;
// ... getters and setters
}
At Tuscany side, I created a reference to this web service and placed WSDL file generated by AXIS somewhere under Tuscany domain:
<reference name="stub">
<interface.java interface="com.sample.tuscany.test.DemoServiceStub"/>
<binding.ws wsdlElement="http://pojo.service.quickstart.samples#wsdl.port(DemoService/DemoServiceHttpSoap11Endpoint)"/>
</reference>
The first 4 methods worked fine, however I was not able to get the correct result from the last method, which returned java bean as a result. I created the same java bean class (samples.quickstart.service.pojo.DemoParamStructure) at Tuscany side and used this class in reference interface:
@Remotable
public interface DemoServiceStub {
@Oneway
public void voidMethod();
@Oneway
public void voidMethodWithParams(int param1, String param2, BigDecimal param3);
public String echoMethod(String value);
public String paramStructureMethod(samples.quickstart.service.pojo.DemoParamStructure structure);
public samples.quickstart.service.pojo.DemoParamStructure resultStructureMethod(int param1, String param2, BigDecimal param3);
}
What I got from calling DemoServiceStub.resultStructureMethod(...) method was the instance of samples.quickstart.service.pojo.DemoParamStructure class with EMPTY private fields. SOAP monitor showed the following SOAP result message, which had values provided for every field:
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Body>
<ns:resultStructureMethodResponse xmlns:ns="http://pojo.service.quickstart.samples">
<ns:return xmlns:ax23="http://pojo.service.quickstart.samples/xsd" type="samples.quickstart.service.pojo.DemoParamStructure">
<ax23:decimalParam>3</ax23:decimalParam>
<ax23:integerParam>1</ax23:integerParam>
<ax23:stringParam>2</ax23:stringParam>
</ns:return>
</ns:resultStructureMethodResponse>
</soapenv:Body>
</soapenv:Envelope>
I am not an experienced web service developer, so most probably I missed something... It looks like XML to Java mapping is not working correctly in my case and skips values for private fields.
I also generated AXIS2 client using ADB and it worked fine. The result SOAP message was almost the same, except that it used http://www.w3.org/2003/05/soap-envelope namespace which seems to be OK since AXIS2 client uses SOAP 1.2.
Can you please advice?
Thanks and kind regards,
Dzmitry
Re: Problem with Tuscany calling an AXIS2 web service
Posted by Raymond Feng <en...@gmail.com>.
Hi,
Tuscany follows the JAXWS/JAXB default Java/XML mapping rules for JavaBeans.
For DemoParamStructure bean, the corresponding XML elements for the
properties should not be qualified (i.e., <decimalParam> instead of
<ax23:decimalParam>, see the xml below). Because the client side receives
qualified XML elements and JAXB databinding fails to populate the
DemoParamStructure.
<ns:return xmlns:ax23="http://pojo.service.quickstart.samples/xsd">
<decimalParam>3</decimalParam>
<integerParam>1</integerParam>
<stringParam>2</stringParam>
</ns:return>
It seems that Axis2 uses different mapping rules for JavaBeans. It's also
interesting that Axis2 produces an attribute:
type="samples.quickstart.service.pojo.DemoParamStructure".
Can you try to annotate DemoParamStructure with JAXB annotations (such as
@XmlElement) to make sure the Java/XML mapping is accurate. One thing you
can try is to use "wsimport" to generate the Java classes out of the WSDL to
see how it looks like.
Thanks,
Raymond
--------------------------------------------------
From: "Dzmitry Rakavets" <Dz...@epam.com>
Sent: Tuesday, December 02, 2008 8:57 AM
To: <us...@tuscany.apache.org>
Subject: Problem with Tuscany calling an AXIS2 web service
> Hello,
>
> I'm trying to investigate Tuscany possibilities to work with external web
> services (for example, provided by AXIS).
>
> I created a very simple AXIS2 web service, which is deployed as POJO on
> Tomcat. Here is the interface it provides:
>
> public interface DemoService {
>
> public void voidMethod();
>
> public void voidMethodWithParams(int param1, String param2, BigDecimal
> param3);
>
> public String echoMethod(String value);
>
> public String
> paramStructureMethod(samples.quickstart.service.pojo.DemoParamStructure
> structure);
>
> public samples.quickstart.service.pojo.DemoParamStructure
> resultStructureMethod(int param1, String param2, BigDecimal param3);
> }
>
> samples.quickstart.service.pojo.DemoParamStructure is a simple java bean:
>
> public class DemoParamStructure {
>
> private int integerParam;
>
> private String stringParam;
>
> private BigDecimal decimalParam;
>
> // ... getters and setters
> }
>
> At Tuscany side, I created a reference to this web service and placed WSDL
> file generated by AXIS somewhere under Tuscany domain:
>
> <reference name="stub">
> <interface.java interface="com.sample.tuscany.test.DemoServiceStub"/>
> <binding.ws
> wsdlElement="http://pojo.service.quickstart.samples#wsdl.port(DemoService/DemoServiceHttpSoap11Endpoint)"/>
> </reference>
>
> The first 4 methods worked fine, however I was not able to get the correct
> result from the last method, which returned java bean as a result. I
> created the same java bean class
> (samples.quickstart.service.pojo.DemoParamStructure) at Tuscany side and
> used this class in reference interface:
>
> @Remotable
> public interface DemoServiceStub {
>
> @Oneway
> public void voidMethod();
>
> @Oneway
> public void voidMethodWithParams(int param1, String param2, BigDecimal
> param3);
>
> public String echoMethod(String value);
>
> public String
> paramStructureMethod(samples.quickstart.service.pojo.DemoParamStructure
> structure);
>
> public samples.quickstart.service.pojo.DemoParamStructure
> resultStructureMethod(int param1, String param2, BigDecimal param3);
> }
>
> What I got from calling DemoServiceStub.resultStructureMethod(...) method
> was the instance of samples.quickstart.service.pojo.DemoParamStructure
> class with EMPTY private fields. SOAP monitor showed the following SOAP
> result message, which had values provided for every field:
>
> <?xml version='1.0' encoding='utf-8'?>
> <soapenv:Envelope
> xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
> <soapenv:Body>
> <ns:resultStructureMethodResponse
> xmlns:ns="http://pojo.service.quickstart.samples">
> <ns:return xmlns:ax23="http://pojo.service.quickstart.samples/xsd"
> type="samples.quickstart.service.pojo.DemoParamStructure">
> <ax23:decimalParam>3</ax23:decimalParam>
> <ax23:integerParam>1</ax23:integerParam>
> <ax23:stringParam>2</ax23:stringParam>
> </ns:return>
> </ns:resultStructureMethodResponse>
> </soapenv:Body>
> </soapenv:Envelope>
>
> I am not an experienced web service developer, so most probably I missed
> something... It looks like XML to Java mapping is not working correctly in
> my case and skips values for private fields.
>
> I also generated AXIS2 client using ADB and it worked fine. The result
> SOAP message was almost the same, except that it used
> http://www.w3.org/2003/05/soap-envelope namespace which seems to be OK
> since AXIS2 client uses SOAP 1.2.
>
> Can you please advice?
>
> Thanks and kind regards,
> Dzmitry