Erro persistenceUnit

Front-end
#1

E ai galera blz??

Estou com um problema ao fazer uma chamada a um servlet no jboss.

segue erro:

[code]HTTP Status 500 -

type Exception report

message

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

exception

javax.persistence.PersistenceException: [PersistenceUnit: CoreWeb] class or package not found
org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1089)
org.hibernate.ejb.Ejb3Configuration.addClassesToSessionFactory(Ejb3Configuration.java:886)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:772)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:183)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:240)
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:120)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
dao.PersistenceUtil.init(PersistenceUtil.java:17)
dao.PersistenceUtil.getEntityManager(PersistenceUtil.java:12)
dao.CategoriaDAO.getAll(CategoriaDAO.java:18)
servlet.BuscarCategoria.doPost(BuscarCategoria.java:45)
servlet.BuscarCategoria.doGet(BuscarCategoria.java:36)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

java.lang.ClassNotFoundException: No ClassLoaders found for: WEB-INF.classes.modelo.Categoria
org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:212)
org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521)
org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
java.lang.ClassLoader.loadClass(Unknown Source)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Unknown Source)
org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:112)
org.hibernate.ejb.Ejb3Configuration.classForName(Ejb3Configuration.java:1005)
org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1077)
org.hibernate.ejb.Ejb3Configuration.addClassesToSessionFactory(Ejb3Configuration.java:886)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:772)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:183)
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:240)
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:120)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
dao.PersistenceUtil.init(PersistenceUtil.java:17)
dao.PersistenceUtil.getEntityManager(PersistenceUtil.java:12)
dao.CategoriaDAO.getAll(CategoriaDAO.java:18)
servlet.BuscarCategoria.doPost(BuscarCategoria.java:45)
servlet.BuscarCategoria.doGet(BuscarCategoria.java:36)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

note The full stack trace of the root cause is available in the JBossWeb/2.0.1.GA logs.[/code]

Segue codigos:

servlet:

[code]package servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import modelo.Categoria;

import dao.CategoriaDAO;

/**

  • Servlet implementation class BuscarCategoria
    */
    public class BuscarCategoria extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**

    • @see HttpServlet#HttpServlet()
      */
      public BuscarCategoria() {
      super();
      // TODO Auto-generated constructor stub
      }

    /**

    • @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
    •  response)

    */
    protected void doGet(HttpServletRequest request,
    HttpServletResponse response) throws ServletException, IOException {
    doPost(request, response);
    }

    /**

    • @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
    •  response)

    */
    protected void doPost(HttpServletRequest request,
    HttpServletResponse response) throws ServletException, IOException {
    List categorias = CategoriaDAO.getInstance().getAll();
    request.setAttribute(“categorias”, categorias);
    RequestDispatcher rd = request.getRequestDispatcher("/Categorias.jsp");
    rd.forward(request, response);
    }
    }
    [/code]

persistence.xml:

[code]<?xml version="1.0" encoding="UTF-8"?>

<persistence-unit name="CoreWeb" transaction-type="RESOURCE_LOCAL">
	<provider>org.hibernate.ejb.HibernatePersistence</provider>
	<class>modelo.Categoria</class>
	<properties>
		<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
		<property name="hibernate.connection.username" value="core" />
		<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
		<property name="hibernate.connection.password" value="core" />
		<property name="hibernate.connection.url" value="jdbc:mysql://192.168.1.100/core" />
	</properties>
</persistence-unit>

[/code]

as classes estão certinhas nos devidos packagens e tudo mais…

Uma vez ouvi de um professor que o perssitence.xml tem que ficar em outro lugar para poder enchergar as classes, isso confere?

Se sim qual o lugar que deve coloca-lo?

abraço a todos e obrigado desde ja…fuiiii

#2