Transaction Aspect not applied for Custom Spring Controller

Hi,

I am using Google Web Toolkit -> Spring -> Hibernate combination.

I have implemented spring's Controller as below:

    public ModelAndView handleRequest(HttpServletRequest request,
            HttpServletResponse response) throws Exception
    {
        service(request, response);
        return null;
    }

and here is my spring config xml:

    <bean id="dataSource"
        class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost/TESTDB" />
        <property name="username" value="root" />
        <property name="password" value="pass" />
    </bean>

    <!-- Hibernate SessionFactory Configuration -->

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">
                    org.hibernate.dialect.MySQLDialect
                </prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.generate_statistics">true</prop>
            </props>
        </property>
        <property name="mappingResources">
            <list>
                <value>Login.hbm.xml</value>
                <!-- Add more Mapping Resources here -->
            </list>
        </property>
    </bean>

    <!-- Transaction Management -->

    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <tx:advice id="transactionAdvice"
        transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"
                rollback-for="java.lang.Exception" />
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <aop:pointcut id="allServiceOperations"
            expression="execution(* com.mycompany.service.*Service.*(..))" />
        <aop:advisor pointcut-ref="allServiceOperations"
            advice-ref="transactionAdvice" />
    </aop:config>

This is my service class:

package com.mycompany.service;

import com.mycompany.spring.GWTSpringController;
import com.mycompany.service.LoginService;
import com.mycompany.databeans.Login;
import com.mycompany.controller.LoginController;

public class LoginServiceImpl extends GWTSpringController implements
        LoginService
{
    private LoginController loginController;

    public void setLoginController(LoginController loginController)
    {
        this.loginController = loginController;
    }

    public boolean login(Login login)
    {
        return loginController.login(login);
    }
}

Now, when I make a request, I get an exception which says:

org.hibernate.HibernateException: No Hibernate Session bound to thread,
and configuration does not allow creation of non-transactional one here

However, I change the pointcut expression to

execution(* com.mycompany.controller.*Controller.*(..))

it works fine.

Why am I facing this problem?

Is something wrong going on when the Google Web Toolkit invokes login()
on my service implementation because of which Spring cannot apply
transaction aspect?

Kindly help me.

Regards,
Jayarama Nettar.