public class DApplicationRouter implements SipApplicationRouter {
   
    // The properties should be name value pairs. The name should
    // be the domain-name and value should be the appName. 
    // The domain name "default" is used to pick any application
    // which use IP address instead of domain name.
    private volatile Map arProps = null;    
    private volatile boolean valid = false;
    private volatile String defaultApp = null;
    private volatile List apps = new ArrayList();
  
    
    public void init(Properties props) {
        this.arProps = new ConcurrentHashMap();
        makePropsCaseInsensitive(props);
        this.defaultApp = this.arProps.get("default");
        this.valid = true;
    }
    
    private void makePropsCaseInsensitive(Properties props) {
        for (Map.Entry entry : props.entrySet()) {
            String key = entry.getKey().toString();
            key = key.trim().toLowerCase();
            if (! key.equals("")) {
                String value = (String) entry.getValue();
                if (value != null) {
                    arProps.put(key, value.trim());
                }
            }
        }
    }


    public void applicationDeployed(List apps) {
        checkValidity();
        this.apps.addAll(apps);
    }

   public SipApplicationRouterInfo 
    getNextApplication(SipServletRequest req, SipApplicationRoutingRegion reg, 
    SipApplicationRoutingDirective dir, SipTargetedRequestInfo stri, 
    Serializable info) {
        checkValidity();        
        if (req.getLocalAddr() != null) { //Worry about incoming requests only.
            return createRouterInfo(findApp(req), req, reg);
        }
        return createRouterInfo(null, null, null);
    }
    
    private String findApp(SipServletRequest req) {
        Address addr = req.getFrom();
        URI uri = addr.getURI();
        if (uri.isSipURI()) {
            String domain = ((SipURI) uri).getHost();
            if (arProps.containsKey(domain)) {
                String appName = arProps.get(domain);
                if (appName != null && apps.contains(appName)) {
                    return appName;
                }
            }
        }        
        return defaultApp;
    }

asadmin deploy --property default=<defaultappname>:<domain1appname>=<appname1> DApplicationRouter.jar