How to pass XMLNode to JAX-RPc web service

I am new to web services using JAX-RPC.
Here is my problem. I need to pass Node object from org.w2c.dom.Node to webservice (using JAX-RPC) and return canonicalBytes back to client.
I know I cannot pass Node directly as a parameter to the method (checked Java Language Typed supported by JAX-RPC).
So to cheat the system, I put in this Node object into a vector and then passed this vector to web service.
Here is the exception:-
java.rmi.RemoteException: serialization error: no serializer is registered for (class oracle.xml.parser.v2.XMLElement, null); nested exception is:
     serialization error: no serializer is registered for (class oracle.xml.parser.v2.XMLElement, null)
     at com.peppercoin.webservice.security.ISignatureVerification_Stub.getCanonicalBytes(ISignatureVerification_Stub.java:77)
     at HelloClient.main(HelloClient.java:29)
Caused by: serialization error: no serializer is registered for (class oracle.xml.parser.v2.XMLElement, null)
     at com.sun.xml.rpc.encoding.DynamicSerializer.getSerializerForObject(DynamicSerializer.java:69)
     at com.sun.xml.rpc.encoding.DynamicSerializer.serialize(DynamicSerializer.java:52)
     at com.sun.xml.rpc.encoding.ReferenceableSerializerImpl.serialize(ReferenceableSerializerImpl.java:59)
     at com.sun.xml.rpc.encoding.soap.CollectionSerializer.serializeArrayElements(CollectionSerializer.java:72)
     at com.sun.xml.rpc.encoding.soap.CollectionSerializer.serializeArrayInstance(CollectionSerializer.java:55)
     at com.sun.xml.rpc.encoding.soap.CollectionSerializerBase.serialize(CollectionSerializerBase.java:98)
     at com.sun.xml.rpc.encoding.ReferenceableSerializerImpl.serialize(ReferenceableSerializerImpl.java:59)
     at com.peppercoin.webservice.security.ISignatureVerification_getCanonicalBytes_RequestStruct_SOAPSerializer.doSerializeInstance(ISignatureVerification_getCanonicalBytes_RequestStruct_SOAPSerializer.java:62)
     at com.sun.xml.rpc.encoding.ObjectSerializerBase.serialize(ObjectSerializerBase.java:100)
     at com.sun.xml.rpc.encoding.ReferenceableSerializerImpl.serialize(ReferenceableSerializerImpl.java:59)
     at com.sun.xml.rpc.client.StreamingSender._writeRequest(StreamingSender.java:441)
     at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:63)
     at com.peppercoin.webservice.security.ISignatureVerification_Stub.getCanonicalBytes(ISignatureVerification_Stub.java:60)
     ... 1 more
Every works great as long as i put in strings in Vector.
Is there a work around or did i miss anything, Please help
I am using Oracle Parser
Thanks
Sagar Malisetti

You can't "cheat the system" this way. The serializer for Vector is trying to find a serializer for the elements in the Vector instance that it received. So, it is trying to find a serializer for whatever is the the runtime type of your org.w3c.dom.Node. When it can't find such a serializer in the TypeMappingRegistry, it throws the exception.

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JAX-RPC: Web service where both server /and/ client are services?

I'm considering a two-way Web service in an application that I'm designing and would appreciate any insight from prior experience.
This will be a standard client-server application, where the server broadcasts messages and the client, in turn, can request further information about the messages that it receives (think RSS-style updates, but with more interaction). [strong]However[strong], instead of having the client poll the server for new messages, I'd like to have the client register itself with the server as a message listener. The server is currently implemented as a Web service on port X. I'd like the client to register itself with the server, and then receive messages on port Y.
I'm considering a design like the following (note the directions of the inheritance arrows):
( Server class ) --<-- ( RemoteServerImpl class ) -->-- / RemoteServer interface /
|
( Listener class ) --<-- ( RemoteListenerImpl class ) -->-- / RemoteListener interface /Some considerations:
* In both cases, the client and server are broken out into an interface and two classes. The non-Remote classes implement all of the functionality. The RemoteX interfaces declare the methods that will be exposed via RPC, and the RemoteXImpl classes are empty subclasses of the non-Remote classes.
* In order to register itself with the Server, the Listener must be passed in as a method parameter, and thus conform to the JAX-RPC specification for value types. However, value types can't implement java.rmi.Remote.
* Only the Server and Listener know anything about each other.
* This application can be run either remotely or locally, depending on how the Server and Listener are instantiated. For the latter, they're instantiated directly and the listener is registered with the Server. For the latter, the RemoteX interfaces will point to the service stubs.
* I don't see an easy way to allow both the Server and the Listener to have references to each other (at least now without some casting magic), since one of them will have to conform to the value type specification, which requires that all of its fields must be valid JAX-RPC types.
I've got the Server portions implemented and working, and am now going to turn to the Listener stuff. Can anybody see a fundamental problem with this design, or can suggest something better?

Hi There,
Because web services are fundamentally a Services-oriented architecture, and not an Object-oriented one, you are unable to pass objects by reference (only by value) hence the design decision to not allow rmi.Remote objects to be sent across the wire. The best way would be to abstract an object which does itself not represent a server, but a route to a server (lets call it ServerPointer). This must contain address, port, service info, etc.
Now, in your Server class, create a factory method which takes a ServerPointer, and returns a reference to a
remote server, e.g. protected Server createServer( ServerPointer p ) (using the necessary APIs to get such a reference)
Hope this helps...

How we can call asynchronous jax-ws web services in OSB 10g r3?

Hello everybody,
We're using the Oracle Service BUS 10.3 here, and we'd like to make some calls from business services to web services in some asynchronous way.
We know Jax-ws provides the callback way and the pooling async way to call it, but as this kind of "operations" are generated in the service consumer stub (and our service consumer rigth now is the OSB itself through the Business Service), we are trying to discover how Oracle Service BUS would use this async feature.
IMHO, the callback approach would be better, since the response pipeline itself should be trigged when the response is ready.
Is the OSB 10.3 ready to use async calls with Jax-WS or we should continue using Jax-Rpc with soap over xml to solve this issue?
Thanks!
Edited by: lucas.teixeira on 26/05/2009 05:05

It is important to remember that in our situation here, we'd like to use the Jax-Ws specification. We could use the Jax-RPC and call our service using the JMS transport and the @WLJmsTransport, we know, but this is out of our plans, since the WL implementation of it will enqueue every requisition in just one consumer for the WS.
Anyone can help us calling async jax-ws services from the OSB ?
Thanks!

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