Global Transaction Timeout for Spring HibernateTransactionManager
===

I am using Spring's HibernateTransactionManager to manage my transactions using annotations. It looks like timeout values can be set on annotations, but i dont see how to set them globally for the whole application and then override on the annotation on a need basis. 

Here is my configuration

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

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

Any ideas? thanks for the help.