FJ-28-Problemas com o DaoInterceptor

seguinte estou resolvendo a apostila da Caelum Fj-28 e to parada na hora de inserir no banco pelo formulario.ok.jsp:

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8" %>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<title>Cadastro de Usuario</title>
	<link rel="stylesheet" type="text/css" href="css/style.css"/>
</head>
<body>

	<h1>Cadastro de usuarios</h1>
	
	<form action="usuario.adiciona.logic">
	
		Login: <input type="text" name="user.login" /> <br/>
		Senha: <input type="text" name="user.senha" /> <br/>
		<input type="submit">
	</form>
	
</body>
</html>

A lógica de inserção é esta UsuarioLogic:

package br.com.caelum.lojavirtual.loja;

import org.vraptor.annotations.Component;
import org.vraptor.annotations.InterceptedBy;
import org.vraptor.annotations.Out;
import org.vraptor.annotations.Parameter;

import br.com.caelum.lojavirtual.dao.Dao;
import br.com.caelum.lojavirtual.dao.DaoFactory;
import br.com.caelum.lojavirtual.modelo.Usuario;

@Component("usuario")
@InterceptedBy(DaoInterceptor.class)
public class UsuarioLogic {
	
		private DaoFactory daoFactory;
		
		@Parameter
		@Out
		public Usuario user = new Usuario();
		
		public UsuarioLogic(DaoFactory daoFactory){
			this.daoFactory = daoFactory;
		}
		
		public void adiciona (){
			//this.daoFactory.beginTransaction();
			System.out.println("Testando aki: "+user.getLogin());
			//this.daoFactory.getUsuarioDao().adiciona(user);
			//this.daoFactory.commit();
		}
		
		public void formulario(){
		}
	}

Observem as 3 linhas comentadas, o programa deveria funcionar com elas,
o DaoFactory deveria ser uma dependencia da minha classe e pra ele passar o algumento é o utilizado o DaoInterceptor.

Do jeito que eu escrevi o programa funciona lindo e inseri no banco, mas se eu tirar aqueles três comentarios pronto... ela da isso daqui:

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Transaction not successfully started
	org.vraptor.VRaptorServlet.service(VRaptorServlet.java:95)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

org.hibernate.TransactionException: Transaction not successfully started
	org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:131)
	br.com.caelum.lojavirtual.dao.DaoFactory.commit(DaoFactory.java:22)
	br.com.caelum.lojavirtual.loja.UsuarioLogic.adiciona(UsuarioLogic.java:30)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	java.lang.reflect.Method.invoke(Unknown Source)
	org.vraptor.component.DefaultLogicMethod.execute(DefaultLogicMethod.java:61)
	org.vraptor.interceptor.ExecuteLogicInterceptor.intercept(ExecuteLogicInterceptor.java:32)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.interceptor.SettingAndValidationInterceptor.intercept(SettingAndValidationInterceptor.java:131)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.interceptor.InjectionInterceptor.intercept(InjectionInterceptor.java:41)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.interceptor.ComponentLookupInterceptor.intercept(ComponentLookupInterceptor.java:58)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	br.com.caelum.lojavirtual.loja.DaoInterceptor.intercept(DaoInterceptor.java:18)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.interceptor.FlashScopeInterceptor.intercept(FlashScopeInterceptor.java:22)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.interceptor.RegisterAttributesInteceptor.intercept(RegisterAttributesInteceptor.java:38)
	org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:72)
	org.vraptor.core.VRaptorExecution.execute(VRaptorExecution.java:98)
	org.vraptor.core.DefaultController.execute(DefaultController.java:46)
	org.vraptor.VRaptorServlet.service(VRaptorServlet.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.29 logs.

esse é meu DaoFactory:

package br.com.caelum.lojavirtual.dao;

import org.hibernate.*;

import br.com.caelum.lojavirtual.modelo.Usuario;
import br.com.caelum.lojavirtual.util.HibernateUtil;

public class DaoFactory {
	
	private final Session session;
	private Transaction transaction;
	
	public DaoFactory(){
		session = HibernateUtil.getSession();
	}
	
	public void beginTransaction() {
		this.transaction = this.session.beginTransaction();		
	}
	
	public void commit(){
		this.transaction.commit();
		this.transaction = null;
	}
	
	public boolean hasTransaction(){
		return this.transaction != null;
	}
	
	public void rollback(){
		this.transaction.rollback();
		this.transaction = null;
	}
	
	public void close(){
		this.session.close();
	}
	
	public Dao<Usuario> getUsuarioDao(){
		return new Dao<Usuario>(this.session, Usuario.class);
	}
	

}

e meu DaoInterceptor:

package br.com.caelum.lojavirtual.loja;


import org.vraptor.*;
import org.vraptor.annotations.Out;
import org.vraptor.view.ViewException;

import br.com.caelum.lojavirtual.dao.DaoFactory;

public class DaoInterceptor implements Interceptor {	
  
  @Out(key="br.com.caelum.lojavirtual.dao.DaoFactory")
  private DaoFactory factory = new DaoFactory();
	
	public void intercept(LogicFlow flow) throws LogicException, ViewException {
		
		//executa a logica
		flow.execute();
		
		
		//se sobrou transacao sem comitar, faz rollback
		if (factory.hasTransaction()){
			factory.rollback();
		}
		factory.close();
	}

}

Alguem pra ajudar? Pois ele abre o formulario mas na hora de cadastrar que ele falha.

8 Respostas

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