mailto:adrian@jboss.org wrote:   Ok, then another way might be:   <bean name="A1" mode="On Demand">    <incallback property="b"/> <bean>   <bean name="A2" mode="On Demand">    <incallback property="b"/> <bean>   <bean name="B" mode="On Demand"/>   But the CallbackDependencyItem also overrides resolve(Controller) and so doesn't do the enableOnDemand()   What the above should do, is that when B gets installed, all the beans that want an instance of that class get enabled with their setB() method invoked.