How to instantiate spring managed beans at runtime?

Question

I stuck with a simple refactoring from plain java to spring. Application has a \"Container\" object which instantiates its parts at runtime. Let me explain with the code:

Answer 1

You don't need the Container because all of the runtime objects should be created, held and managed by ApplicationContext. Think about a web application, they are much the same. Each request contains external data/environment info as you mentioned above. What you need is a prototype/request scoped bean like ExternalData or EnvironmentInfo which can read and hold runtime data through a static way, let's say a static factory method.

If you do need a container to save the runtime objects, code should be

class Container {

    List list;
    ApplicationContext context;//injected by spring if Container is not a prototype bean

    public void load() {// no loop inside, each time call load() will load a runtime object
        RuntimeBean bean = context.getBean(RuntimeBean.class); // see official doc
        list.add(bean);// do whatever
    }
}

Official doc Singleton beans with prototype-bean dependencies.