Add SOAP header object using pure JAX-WS

HeaderInJAXWS.java

 private static IniciarAulaRetorno iniciarAulaPratica(IniciarAulaDados dados) {
        MonitAulas service = new MonitAulas();
        MonitAulasSoap port = service.getMonitAulasSoap();

        BindingProvider bindingProvider = (BindingProvider) port;
        Binding binding = bindingProvider.getBinding();
        
        /* For error 307
        String WS_URL = "https://renach2.es.gov.br/WebServices/MonitAulasPraticas/MonitAulasPraticas.asmx?wsdl";
        Map<String, Object> req_ctx = bindingProvider.getRequestContext();
        req_ctx.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, WS_URL);
        */
   
        List<Handler> handlersList = new ArrayList<>();

        JAXBElement<MonitAulaHeader> createMonitAulaHeader = new ObjectFactory().createMonitAulaHeader(new MonitAulaHeader());

        handlersList.add(new SOAPHandler<SOAPMessageContext>() {
            @Override
            public boolean handleMessage(final SOAPMessageContext context) {
                try {
                    // checking whether handled message is outbound one as per Martin Strauss answer
                    final Boolean outbound = (Boolean) context.get("javax.xml.ws.handler.message.outbound");
                    if (outbound != null && outbound) {
                        // obtaining marshaller which should marshal instance to xml
                        final Marshaller marshaller = JAXBContext.newInstance(MonitAulaHeader.class).createMarshaller();
                        // adding header because otherwise it's null
                        // if get return null, call addHeader
                        SOAPHeader soapHeader = context.getMessage().getSOAPPart().getEnvelope().getHeader();
                        // marshalling instance (appending) to SOAP header's xml node
                        marshaller.marshal(createMonitAulaHeader, soapHeader);
                    }
                } catch (final Exception e) {
                    throw new RuntimeException(e);
                }
                return true;
            }

            @Override
            public Set<QName> getHeaders() {
                Set<QName> ts = new HashSet<>();
                ts.add(createMonitAulaHeader.getName());
                return ts;
            }

            @Override
            public boolean handleFault(SOAPMessageContext context) {
                return false;
            }

            @Override
            public void close(MessageContext context) {
            }
        });
        binding.setHandlerChain(handlersList);

        return port.iniciarAula(dados);
    }

//reference: https://stackoverflow.com/questions/10654608/add-soap-header-object-using-pure-jax-ws