Overriding bean scope

[ceineke]

(I'm using Spring v3.1.1.)

I'm fond of the request bean scope and started using it heavily in my web services. I have run into a small issue, however.

After I implement the domain logic, which may use singleton-scoped or prototype-scoped beans, I wrap a web service interface around it. To avoid concurrency issues, I redefine some of the singleton-scoped or prototype-scoped beans (predominantly those that aren't stateless) to be request-scoped.

Unfortunately I need to duplicate the domain model's bean definitions in my service's bean definition and add a scope="request" property and a <aop:scoped-proxy> section to each bean that I redefine.

Is it possible to extend a bean definition instead of overriding it completely?

I have full access to the code and bean definition files.

[bytor99999]

There is bean definition inheritance in xml

<bean id="someParent" class="blah.Blah">
…property and other settings for shared information

<bean id="someChild" parent="someParent">

so someChild with have all the information set from someParent.

Hope that helps.

Personally, I have never seen a need to have a scope other than Singleton. If I find that I need a different scope, I use it as a code smell that something is up with my design, either that I am declaring beans for stateful objects that shouldn't be beans, or sthey shouldn't have state, or I just wrote bad code. Not that there aren't corner cases that might need a bean at a different scope, I have just never come across such a case.

Good Luck

Mark