[jboss-dev-forums] [Design of POJO Server] - Re: Generalizing dependency injection

[adrian@jboss.org]

"scott.stark at jboss.org" wrote : So what is the benefit to BeanFactory over an instance factory on the bean ctor metadata? 

I wouldn't describe it as a benefit, its a different semantic.

Factory construction is just an alternate way to construct a singleton

  | <bean>
  |    <constructor factroyClass="x.y.z.A" factoryMethod="create"/>
  | 

A bean factory creates an object that implements BeanFactory
on which you can call create() to create as many instances as you like:

  | <beanfactory name="MyFactory">
  |    ...
  | 
  | public class MyClass
  | {
  |    @Inject("MyFactory")
  |    public void setFactory(BeanFactory factory) {}
  | 
  |    public void doStuff()
  |    {
  |         Object one = factory.create();
  |         Object two = factory.create();
  |    }
  | }
  | 

The main usecase of beanfactory so far has been to do dependency injection
into aop's advices.
http://viewvc.jboss.org/cgi-bin/viewvc.cgi/jbossas/projects/microcontainer/trunk/aop-mc-int/src/main/org/jboss/aop/microcontainer/beans/GenericBeanAspectFactory.java?revision=61978&view=markup

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4136619#4136619

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4136619