@Override
    public void start() {
        sb.build().start().join();
    }
@param handler        Specific service provider.
@param httpMethods    Register the http methods which the handler service accepts. Other methods respond "405, Method Not Allowed".
oap-server/server-library/library-server/src/main/java/org/apache/skywalking/oap/server/library/server/http/HTTPServer.java