# FAQ

## Does JAX-WS 2.0 support JAX-RPC 1.X?

No. Although, JAX-WS's roots come from JAX-RPC, JAX-WS is a completely different component than JAX-RPC.

## What is the difference between JAX-RPC and JAX-WS ?

One of the main difference between JAX-RPC and JAX-WS is the programming model. A JAX-WS based service uses annotations (such @WebService) to declare webservice endpoints. Use of these annotations obviates the need for deployment descriptors. With JAX-WS, you can have a webservice deployed on a Java EE compliant application server without a single deployment descriptor. Apart from these, other additional features (such asynchronous callbacks etc) are also present.

## Can a JAX-WS and a JAX-RPC based service co-exist?

Yes.

## Is it downloadable from maven repository ?

Yes from .

## How do I find out which version of the JAX-WS RI I'm using?

Run the following command

    $ wsgen or wsimport -version

Alternatively, each JAX-WS jar has version information in its META-INF/MANIFEST.MF.

## How can I change the Web Service address dynamically for a request ?

    ((BindingProvider)proxy).getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, "...");

## How do I do basic authentication in JAX-WS ?

You can do the following:

    HelloService service = new HelloService();
    Hello proxy = (service.getHelloPort());
    ((BindingProvider)proxy).getRequestContext().put(BindingProvider.USERNAME_PROPERTY, "userfoo");
    ((BindingProvider)proxy).getRequestContext().put(BindingProvider.PASSWORD_PROPERTY, "passbar");

USERNAME_PROPERTY, PASSWORD_PROPERTY are used primarily for service requests. I think when you instantiate Service, it fetches WSDL and the server is returning 401. You could try any one of the following solutions.

- Use java.net.Authenticator class in your client application.
- Provide a local access to the WSDL using catalog. There is a catalog sample in the jax-ws distribution.
- Configure web.xml to allow GET requests without authentication

## Which standards are supported by JAXWS?

- Web Services Addressing 1.0 - Core

- Web Services Addressing 1.0 - SOAP Binding

- Web Services Addressing 1.0 - Metadata

- Web Services Addressing 1.0 - WSDL Binding (RI specific support)

- WS-Addressing - Member Submission

- SOAP 1.1 and 1.2

- REST and XML/HTTP

- WS-I Basic Profile 1.2 and 2.0

- WS-I Simple SOAP Binding Profile 1.0

- WS-I Attachment Profile 1.0

- MTOM