Attachments using JAX - RPC

Question

I am using JAX - RPC for attachemnts using jwsdp-1.2. I am using DataHandler for attachments. I have been able to deploy the web service but when I try to connect to web service using client, I get following error. ny help will be greatly appreciated
serialization error: java.lang.NullPointerException
at com.sun.xml.rpc.encoding.AttachmentSerializer.serializeAsAttachment(AttachmentSerializer.java:120)
at com.sun.xml.rpc.encoding.AttachmentSerializer.serialize(AttachmentSerializer.java:74)
at com.sun.xml.rpc.encoding.ReferenceableSerializerImpl.serialize(ReferenceableSerializerImpl.java:71)
at attachments.client.AttachmentExampleAPI_sendDocument_RequestStruct_SOAPSerializer.doSerializeInstance(AttachmentExampleAPI_sendDocument_RequestStruct_SOAPSerializer.java:88)
and more lines of error.
Below is my client and webservice code :
CLIENT
FileDataSource fs = new FileDataSource("abc.txt");
DataHandler dhSource = new DataHandler(fs);
AttachmentExampleAPI up = new TestService_Impl().getAttachmentExampleAPIPort();
up.sendDocument("properties", dhSource));
WEBSERVICE CODE
public void sendDocument(String name, DataHandler dh) throws java.rmi.RemoteException {
DataSource ds = rdh.getDataSource();
dh.writeTo(new FileOutputStream("abc.txt" ));
Any help regarding the error will be great.

Answer 1

Not sure exactly what the problem is but i have sent attachements successfully from the server to client using:
SERVER method:
public javax.activation.DataHandler getAudioMIMEAttachment(java.lang.String in0, java.lang.String in1) throws java.rmi.RemoteException {
String inputFilename = null;
String inputFormat = null;               
inputFilename = "C:\\wav\\" + in0 + "." + in1;
System.out.println("You have requested the following file: " + inputFilename);
//create a new DataHandler object for the file contents
DataHandler dh = new DataHandler(new FileDataSource(new File(inputFilename)));
return dh;                    
Chunks from client code:
StreamingMultimediaSoapBindingStub stub = null;
try
stub = (StreamingMultimediaSoapBindingStub)(new StreamingDemoServiceLocator().getPort(StreamingMultimediaSoapBindingStub.class));
catch (javax.xml.rpc.ServiceException jre) {
System.err.println("Could not get client stub.");
jre.printStackTrace();
//call for binary DataHandler attachment
if(stub != null)
try
dh = stub.getAudioMIMEAttachment("long", "wav");                                   
catch (java.rmi.RemoteException re) {
System.err.println("Error whilst calling method on client stub.");
re.printStackTrace();                                   
Well, hope it helps
regards
Paul