[RESOLVIDO] JSP +JPA - ERRO javax.persistence.TransactionRequiredException: Executing an update/delete query

INFO: HHH000397: Using ASTQueryTranslatorFactory

javax.persistence.TransactionRequiredException: Executing an update/delete query

at org.hibernate.query.internal.AbstractProducedQuery.executeUpdate(AbstractProducedQuery.java:1496)

at com.cleiton.consultasAtualizarDeletar.ListarUsuarios.delete(ListarUsuarios.java:43)

at servlet.ServletCadastrousuario.doGet(ServletCadastrousuario.java:35)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)

@Transactional

public void  delete(String codigo) throws Exception {

Consultar consulta = new Consultar ();

EntityManager obconsulta = consulta.getEntityManager();

Query query= obconsulta.createQuery("DELETE CADASTRO_USUARIO U WHERE U.USR_CODIGO='"+codigo+"'");

   
   query.executeUpdate();
//((EntityManager) query).getTransaction().commit();

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.transaction.Transactional;

import com.cleiton.cadastro.Usuario;

import com.cleiton.consultasAtualizarDeletar.ListarUsuarios;

import com.cleiton.topicos2.SalvarUsuario;

@WebServlet("/salvarusuario")

public class ServletCadastrousuario extends HttpServlet {

private static final long serialVersionUID = 1L;

private ListarUsuarios listarusuarios;

private SalvarUsuario salvarUsuario = new com.cleiton.topicos2.SalvarUsuario();

public ServletCadastrousuario() {

listarusuarios = new ListarUsuarios();

 }

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

//	response.getWriter().append("Served at: ").append(request.getContextPath());
	 try {
		    String acao = request.getParameter("acao");
		   String user = request.getParameter("user");
		      if (acao.equalsIgnoreCase("delete")) {
		         listarusuarios.delete(user);
		          RequestDispatcher view = request.getRequestDispatcher("/menu.jsp");
		          request.setAttribute("codigo", listarusuarios.listaTodos());
		          view.forward(request, response);
				
				
		              }
		          }
		  catch (Exception e) {
		      e.printStackTrace();
		          }
}


protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	
	String nome = request.getParameter("Nome");
	String cpf = request.getParameter("CPF");
	String email = request.getParameter("Email");
	String senha = request.getParameter("Senha");
	String telresidencial = request.getParameter("Residencial");
	String celular = request.getParameter("Celular");
	String cep = request.getParameter("Cep");
	String numero = request.getParameter("Numero");
	String logradouro = request.getParameter("Logradouro");
	String bairro = request.getParameter("Bairro");
	String localidade = request.getParameter("Localidade");
	String estado = request.getParameter("Estado");
	
	
	Usuario usuario = new Usuario();
	
	usuario.setUSR_NOME(nome);
	usuario.setUSR_CPF(cpf);
	usuario.setUSR_EMAIL(email);
	usuario.setUSR_SENHA(senha);
	usuario.setUSR_TELEFONE(telresidencial);
	usuario.setUSR_CELULAR(celular);
	usuario.setUSR_CEP(cep);
	usuario.setUSR_NUMERO(numero);
	usuario.setUSR_LOGRADOURO(logradouro);
	usuario.setUSR_BAIRRO(bairro);
	usuario.setUSR_LOCALIDADE(localidade);
	usuario.setUSR_ESTADO(estado);
	
	

	salvarUsuario.salvar(usuario);
	RequestDispatcher r = request.getRequestDispatcher( "login.jsp" );
	r.forward( request, response );
	
}

<persistence-unit name="teste" transaction-type="RESOURCE_LOCAL">
	
	<properties>
		<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/sistema_escolar"/>
		<property name="javax.persistence.jdbc.user" value="root"/>
		<property name="javax.persistence.jdbc.password" value="root"/>
		<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
		
		<!-- validate | update | create | create-drop -->
		<property name="hibernate.hbm2ddl.auto" value="update"/>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>

	

</persistence-unit>