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CTF starts by CDI enable your application providing all the advantages of CDI. While CTF can do more than that, just by adding the CTF listener in the web.xml or sip.xml of your application, you will be able to inject beans, produce beans and make use of the CDI contexts and scopes as you wish.
So for example, you can develop a sip registar module and make it available in the classpath of any application. From there you can inject the registar module and delegate registration request to it.
The SipRegistar could be like this:
@ApplicationScoped
public class SipRegistar {
private static Logger logger = Logger.getLogger(SipRegistar.class);
private static final String CONTACT_HEADER = "Contact";
@Produces HashMap<String, String> users = new HashMap<String, String>();
public void handleRegister(SipServletRequest req) throws ServletException,
IOException {
if(logger.isInfoEnabled()) {
logger.info("Received register request: " + req.getTo());
}
int response = SipServletResponse.SC_OK;
SipServletResponse resp = req.createResponse(response);
Address address = req.getAddressHeader(CONTACT_HEADER);
String fromURI = req.getFrom().getURI().toString();
int expires = address.getExpires();
if(expires < 0) {
expires = req.getExpires();
}
if(expires == 0) {
users.remove(fromURI);
if(logger.isInfoEnabled()) {
logger.info("User " + fromURI + " unregistered");
}
} else {
resp.setAddressHeader(CONTACT_HEADER, address);
users.put(fromURI, address.getURI().toString());
if(logger.isInfoEnabled()) {
logger.info("User " + fromURI +
" registered with an Expire time of " + expires);
}
}
resp.send();
}
}
Then in your application you can delegate all sip registration request to the SipRegistar module by doing:
@Inject
SipRegistar sipRegistar;
public void processRegister(@Observe @Register SipServletRequest req){
sipRegistar.handleRegister(req);
}
What is actually happening, is that CTF will replace the AnnotationProcessor, in the case of Tomcat 6.x, or InstanceManager in the case of JBoss Web (JBoss AS5) and Tomcat 7.x with CTF version of AnnotationProcessor or InstanceManager that allows CTF to bootstrap and enable your converged application for dependency injection and contextual lifecycle management.
Being the fundamental feature of the framework, CTF will "CDI-enable" a converged application providing:
CDI Telco Framework Features
Java EE 6 integration and providing a unified, contextual, programming model for Java Web and Converged Telco Applications.
Development of reusable (across different applications) sip modules and flexibility through the component based approach
Clean and simple programming model.