configure server.xml Tomcat for async web services

I don't know if i can configure server.xml for async web services Jersey. For async i use Guava lib, and i define one services class with:

public GeneralServices()  {

        service = MoreExecutors.listeningDecorator(Executors
                .newFixedThreadPool(10));

}

//methods

Now how i can tell Tomcat to instance this class when start? is possible?

If i have Grizzly is more easy because i have:

public static HttpServer startServer() {

        final GeneralServices dao = new GeneralServices();
        final ResourceConfig rc = new Application(dao);

        return GrizzlyHttpServerFactory.createHttpServer(URI.create(BASE_URI), rc);
    }

    /**
     * Main method.
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        final HttpServer server = startServer();
        System.out.println(String.format("Jersey app started with WADL available at "
                + "%sapplication.wadl\nHit enter to stop it...", BASE_URI));
        System.in.read();
        server.stop();
    }

but in Tomcat?