Erro no vraptor

HTTP Status 404 - URL not found, no registered component matches. Cause: org.vraptor.component.ComponentNotFoundException: Component for usuario/usuario not found. For further information, check the log files for the root cause. Enable VRaptor DEBUG/TRACE messages in log4J if necessary.

type Status report

message URL not found, no registered component matches. Cause: org.vraptor.component.ComponentNotFoundException: Component for usuario/usuario not found. For further information, check the log files for the root cause. Enable VRaptor DEBUG/TRACE messages in log4J if necessary.

description The requested resource (URL not found, no registered component matches. Cause: org.vraptor.component.ComponentNotFoundException: Component for usuario/usuario not found. For further information, check the log files for the root cause. Enable VRaptor DEBUG/TRACE messages in log4J if necessary.) is not available.

package br.com.caelum.lojavirtual.dao;

import java.util.List;

import org.hibernate.Session;

public class Dao<T> {
	
	private Session session;
	private final Class classe;
	
    Dao(Session session, Class classe){
    	this.session = session;
    	this.classe = classe;
    }
    
    public void adiciona(T u){
    	this.session.save(u);
    }
    
    public void remove(T u){
    	this.session.delete(u);
    }
    
    public void atualiza(T u){
    	this.session.merge(u);
    }
    
    public List<T> listaTudo(){
    	return this.session.createCriteria(this.classe).list();
    }
    
    public T procura(Long id){
    	return (T) session.load(this.classe, id);
    }
    
	
	

}

package br.com.caelum.lojavirtual.dao;

import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;

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);
	}

}

package br.com.caelum.lojavirtual.logic;

import org.vraptor.annotations.Component;

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

@Component
public class UsuarioLogic {
	
	public void adiciona(Usuario usuario){
		
		Dao dao = new DaoFactory().getUsuarioDao();
		
		Usuario u = new Usuario();
		
		u.setLogin(u.getLogin());
		u.setSenha(u.getSenha());
		
		System.out.println("Adiciona Usuário: "+usuario.getLogin());	
		
	}
	
	public void formulario(){
		
	}
	
	
	

}