<datasource jta="true" jndi-name="java:jboss/datasources/mydb"
                pool-name="DB" enabled="true" use-ccm="true">
                <connection-url>jdbc:mysql://localhost:3306/mydb</connection-url>
                <driver-class>com.mysql.jdbc.Driver</driver-class>
                <driver>mysql</driver>
                <security>
                    <user-name>****</user-name>
                    <password>****</password>
                </security>
                <validation>
                    <valid-connection-checker
                        class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker" />
                    <background-validation>true</background-validation>
                    <exception-sorter
                        class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter" />
                </validation>
            </datasource>

<persistence-unit name="PU_DB" transaction-type="RESOURCE_LOCAL">
<non-jta-data-source>java:jboss/datasources/mydb</non-jta-data-source>
<class>X.Y.Z.model.Employee</class>
<properties>
    <property name="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform"/>
</properties>

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

<bean id="employeeService" class="X.Y.Z.service.EmployeeServiceImpl" />
<bean id="employeeDao" class="X.Y.Z.dao.EmployeeDaoImpl" />

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" >
    <property name="dataSource" ref="dataSource" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="database" value="MYSQL" />
            <property name="showSql" value="true" />
        </bean>
    </property>
    <property name="persistenceUnitName" value="PU_DB" />
</bean>

<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
    <property name="jndiName" value="java:jboss/datasources/mydb"/>
</bean>

<bean id="TU_DB"
    class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<tx:annotation-driven transaction-manager="TU_DB" />

@Repository
@Transactional(X.Y.Z.utils.ClassUtil.TU_DB)
public class EmployeeDaoImpl implements EmployeeDao {
@PersistenceContext(unitName = X.Y.Z.utils.ClassUtil.PU_DB)
private EntityManager em;
public List<Employee> getEmployes() {
    TypedQuery<Employee> queryList = em.createQuery("from Employee",Employee.class);
    return queryList.getResultList();
}