Spring Web Services

Exercise: Todo SOAP Service (Interceptors)

The objective of this exercise is to add Apache CXF Interceptors to the SOAP-based todo web service and client.

Add the org.apache.cxf:cxf-rt-features-logging dependency to the Maven project of the service
Add the LoggingInInterceptor and LoggingOutInterceptor to the web service using annotations

Derive the AuthOutInterceptor from the AbstractSoapInterceptor and add it to the PRE_PROTOCOL phase using the base constructor.

Implement the handleMessage that adds a header with a security token to outgoing SOAP messages

Header header = new Header(name, token, new JAXBDataBinding(String.class));
message.getHeaders().add(header);

In the WebClientConfig class, add the interceptor to the client proxy of the web service
```
ClientProxy.getClient(proxy).getOutInterceptors().add(interceptor);
```

Derive the AuthInInterceptor from the AbstractSoapInterceptor and add it to the POST_PROTOCOL phase using the base constructor.
Implement the handleMessage that reads the header of incoming SOAP messages, verifies the contained security token and throws a Fault exception if the token is not valid
```
Header header = message.getHeader(name);
String token = ((Element) header.getObject()).getTextContent();
```
In the WebServiceConfig class, add the interceptor to the endpoint of the web service
```
endpoint.getInInterceptors().add(interceptor);
```