Ajuda com dataSource

Front-end
#1

Ola pessoal,estou precisando de ajuda para configurar um dataSource no JBoss 4.2.0,dei uma olhada nos exemplos do jboss mas estou totalmente perdido,vejam o que eu tenho ate agora:
Menu hibernate.cfg.xml é este:


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
                                         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
 <session-factory name="">
  <property name="connection.url">jdbc:postgresql://localhost:5432/Tcc</property>
  <property name="connection.username">postgres</property>
  <property name="connection.password">512815</property>
  <property name="connection.driver_class">org.postgresql.Driver</property>
  <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
  <property name="hibernate.jdbc.batch_size">20</property>
  <!--   <property name="hibernate.cache.use_query_cache">true</property> 
 Exibe no console o SQL gerado pelo hibernate-->
  <property name="show_sql">true</property>
  <mapping class="com.Lgweb.Tcc.Model.Cidade"/>
  <mapping class="com.Lgweb.Tcc.Model.Cliente"/>
  <mapping class="com.Lgweb.Tcc.Model.Condicaopagamento"/>
  <mapping class="com.Lgweb.Tcc.Model.Contaspagar"/>
  <mapping class="com.Lgweb.Tcc.Model.Contasreceber"/>
  <mapping class="com.Lgweb.Tcc.Model.DiascondicaoDias"/>
  <mapping class="com.Lgweb.Tcc.Model.Dias"/>
  <mapping class="com.Lgweb.Tcc.Model.Fornecedor"/>
  <mapping class="com.Lgweb.Tcc.Model.Numeracao"/>
  <mapping class="com.Lgweb.Tcc.Model.Pedido"/>
  <mapping class="com.Lgweb.Tcc.Model.Pedidocompra"/>
  <mapping class="com.Lgweb.Tcc.Model.Itenscompra"/>
  <mapping class="com.Lgweb.Tcc.Model.Itensvenda"/>
  <mapping class="com.Lgweb.Tcc.Model.Perfil"/>
  <mapping class="com.Lgweb.Tcc.Model.Pessoafisica"/>
  <mapping class="com.Lgweb.Tcc.Model.Pessoajuridica"/>
  <mapping class="com.Lgweb.Tcc.Model.Produto"/>
  <mapping class="com.Lgweb.Tcc.Model.Ramoatividade"/>
  <mapping class="com.Lgweb.Tcc.Model.Estado"/>
  <mapping class="com.Lgweb.Tcc.Model.Usuario"/>
  <mapping class="com.Lgweb.Tcc.Model.Formapagamento"/>
  <mapping class="com.Lgweb.Tcc.Model.ProdutoNumeracao"/>
 </session-factory>
</hibernate-configuration>

Classe HibernateUtil


package com.Lgweb.Tcc.Util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

public class HibernateUtil {	
		private static final SessionFactory sessionFactory;
		private static final ThreadLocal<Session> threadLocal =	new ThreadLocal<Session>();	
		static{
			try{
				sessionFactory = new AnnotationConfiguration().configure("hibernate.cfg.xml").buildSessionFactory();

			} catch(Throwable t){
				throw new ExceptionInInitializerError(t);
				
			}
		}
		
		public static Session getInstance(){
			Session session = threadLocal.get();
			session = sessionFactory.openSession();
			threadLocal.set(session);
			return session;
		}

		public static SessionFactory getSessionFactory() {
			return sessionFactory;
		}

	

	}

E este arquivo de exemplo de configuração que estava no diretorio de exemplos do jboss,mas onde coloco este arquivo,o que mais devo alterar?Alguem poderia dar umas dicas?
Mto obrigado,abraços.


 <!--  ==================================================================== 
  --> 
- <datasources>
- <local-tx-datasource>
  <jndi-name>PostgresDS</jndi-name> 
  <connection-url>jdbc:postgresql://localhost:5432/Tcc</connection-url> 
  <driver-class>org.postgresql.Driver</driver-class> 
  <user-name>postgres</user-name> 
  <password>5128152</password> 
- <!--  sql to call when connection is created.  Can be anything, select 1 is valid for PostgreSQL
        <new-connection-sql>select count(*)from Cidade</new-connection-sql>
        
  --> 
- <!--  sql to call on an existing pooled connection when it is obtained from pool.  Can be anything, select 1 is valid for PostgreSQL
        <check-valid-connection-sql>select count(*)from Cidade</check-valid-connection-sql>
        
  --> 
- <!--  corresponding type-mapping in the standardjbosscmp-jdbc.xml 
  --> 
- <metadata>
  <type-mapping>PostgreSQL 8.0</type-mapping> 
  </metadata>
  </local-tx-datasource>
  </datasources>
#2