布尔变量必须在diff spring bean中共享

Question

I have two beans

<bean id="eventService" class="xxx.xxxx.xxxxx.EventServiceImpl">
</bean>

<bean id="UpdateService" class="xxx.xxxx.xxxxx.UpdateServiceImpl">
</bean>

A Boolean variable has to be shared... means updating Boolean in a bean should be available for other bean to know the status

appreciate your idea guys

Answer 1

The fact that you have multiple objects interested in a the same flag sounds very much like an event. Have a look at Spring's support from broadcasting and listening to events (including custom events).

http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/beans.html#context-functionality-events

What you could do is have one managed object be the "owner" of that flag, and broadcast state changes to anyone else that's interested via an event.

Answer 2

I'm afraid you will need some value holder bean, something like this:

public class ValueHolder{
    private boolean flag;
    public boolean isFlag(){return flag;}
    public void setFlag(boolean flag){this.flag=flag;}
}

Wire this as a Spring Bean and inject it into your service beans.

Just for completeness: or you could use a static field, but that's even uglier.