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Posted to java-user@axis.apache.org by Rajagopal <ra...@govindaraj.com> on 2004/02/26 16:13:09 UTC
Serializer/deserializer for SOAPMessage

Hi there,

I am using a JAXMServlet that implements the ReqRespListener interface.  
The allowed method is onMessage which takes a SOAPMessage parameter and
returns a SOAPMessage object.  When I tried hosting the JAXMServlet in
Axis I got a serializer error.  I specified a beanMapping and I was able
to get the WSDL using which I generated proxy classes using WSDL2Java.  I
wrote a client which makes a call to the service using the stub, but it
throws a NullPointerException.  I believe I am using the wrong ser/deser.
Could someone suggest the serializer I am supposed to use to ser/deser
SOAPMessage objects?  How do I go about writing my own serializer?  I
have started looking at the files in the samples folder for custom
ser/deser examples, but would like to see a simple working example that
would ser/deser SOAPMessages.  I have copied below the error message I
get on running my client.  Thanks.

- Exception:
java.lang.NullPointerException
        at
        org.apache.axis.Message.getContentDescription(Message.java:464)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
        Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at
        org.apache.axis.utils.BeanPropertyDescriptor.get(BeanPropertyDescriptor.java:144)
        at
        org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:207)
        at
        org.apache.axis.encoding.SerializationContextImpl.serializeActual(SerializationContextImpl.java:1255)
        at
        org.apache.axis.encoding.SerializationContextImpl.serialize(SerializationContextImpl.java:795)
        at org.apache.axis.message.RPCParam.serialize(RPCParam.java:225)
        at
        org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:387)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:174)
        at
        org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:509)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:270)
        at org.apache.axis.SOAPPart.getAsString(SOAPPart.java:483)
        at org.apache.axis.SOAPPart.getAsBytes(SOAPPart.java:375)
        at org.apache.axis.Message.getContentType(Message.java:399)
        at
        org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:341)
        at
        org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:122)
        at
        org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
        at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
        at org.apache.axis.client.Call.invokeEngine(Call.java:2564)
        at org.apache.axis.client.Call.invoke(Call.java:2553)
        at org.apache.axis.client.Call.invoke(Call.java:2248)
        at org.apache.axis.client.Call.invoke(Call.java:2171)
        at org.apache.axis.client.Call.invoke(Call.java:1691)
        at
        localhost.axis.services.DataMarshallingService.DataMarshallingServiceSoapBindingStub.onMessage(DataMarshallingServiceSoapBindingStub.java:201)
        at test.TestService.main(TestService.java:63)
AxisFault
faultCode:
{http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode: 
faultString: java.io.IOException: java.lang.NullPointerException
faultActor: 
faultNode: 
faultDetail: 
        {http://xml.apache.org/axis/}stackTrace: java.io.IOException:
        java.lang.NullPointerException
        at
        org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:262)
        at
        org.apache.axis.encoding.SerializationContextImpl.serializeActual(SerializationContextImpl.java:1255)
        at
        org.apache.axis.encoding.SerializationContextImpl.serialize(SerializationContextImpl.java:795)
        at org.apache.axis.message.RPCParam.serialize(RPCParam.java:225)
        at
        org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:387)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:174)
        at
        org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:509)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:270)
        at org.apache.axis.SOAPPart.getAsString(SOAPPart.java:483)
        at org.apache.axis.SOAPPart.getAsBytes(SOAPPart.java:375)
        at org.apache.axis.Message.getContentType(Message.java:399)
        at
        org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:341)
        at
        org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:122)
        at
        org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
        at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
        at org.apache.axis.client.Call.invokeEngine(Call.java:2564)
        at org.apache.axis.client.Call.invoke(Call.java:2553)
        at org.apache.axis.client.Call.invoke(Call.java:2248)
        at org.apache.axis.client.Call.invoke(Call.java:2171)
        at org.apache.axis.client.Call.invoke(Call.java:1691)
        at
        localhost.axis.services.DataMarshallingService.DataMarshallingServiceSoapBindingStub.onMessage(DataMarshallingServiceSoapBindingStub.java:201)
        at test.TestService.main(TestService.java:63)


java.io.IOException: java.lang.NullPointerException
        at org.apache.axis.AxisFault.makeFault(AxisFault.java:129)
        at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:272)
        at org.apache.axis.SOAPPart.getAsString(SOAPPart.java:483)
        at org.apache.axis.SOAPPart.getAsBytes(SOAPPart.java:375)
        at org.apache.axis.Message.getContentType(Message.java:399)
        at
        org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:341)
        at
        org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:122)
        at
        org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
        at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
        at org.apache.axis.client.Call.invokeEngine(Call.java:2564)
        at org.apache.axis.client.Call.invoke(Call.java:2553)
        at org.apache.axis.client.Call.invoke(Call.java:2248)
        at org.apache.axis.client.Call.invoke(Call.java:2171)
        at org.apache.axis.client.Call.invoke(Call.java:1691)
        at
        localhost.axis.services.DataMarshallingService.DataMarshallingServiceSoapBindingStub.onMessage(DataMarshallingServiceSoapBindingStub.java:201)
        at test.TestService.main(TestService.java:63)
Caused by: java.io.IOException: java.lang.NullPointerException
        at
        org.apache.axis.encoding.ser.BeanSerializer.serialize(BeanSerializer.java:262)
        at
        org.apache.axis.encoding.SerializationContextImpl.serializeActual(SerializationContextImpl.java:1255)
        at
        org.apache.axis.encoding.SerializationContextImpl.serialize(SerializationContextImpl.java:795)
        at org.apache.axis.message.RPCParam.serialize(RPCParam.java:225)
        at
        org.apache.axis.message.RPCElement.outputImpl(RPCElement.java:387)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.message.SOAPBody.outputImpl(SOAPBody.java:174)
        at
        org.apache.axis.message.SOAPEnvelope.outputImpl(SOAPEnvelope.java:509)
        at
        org.apache.axis.message.MessageElement.output(MessageElement.java:783)
        at org.apache.axis.SOAPPart.writeTo(SOAPPart.java:270)
        ... 16 more