Apply dynamic properties to a bean at runtime

Question

Assume I have a bean DialogBox, with properties for height and width:

public class DialogBox {
 int x;
 int y;
 ...
}

In my applicationCont

Answer 1

Take a look at the Spring OSGi Compendium services, they've got a property manager called "managed-properties", which allows you not only to update the properties at runtime, but while the application is running if you select the "container-managed" update strategy.

Answer 2

If I understood the question, you can use a FactoryBean to customize bean creation logic in Spring.

Answer 3

1. Use FactoryBean (as already suggested) to customize instantiation.
2. set scope="prototype" on the bean, so that each time an instance is required, a new one should be created.
3. In case you want to inject the prototype bean into a singleton bean, use lookup-method (Search for lookup-method here)

I'm not sure if this would fit your case though. Another suggestion would be:

In @PostConstruct methods of your various "clients" set the properties as desired on the already injected dialog window. Like:

public class MyDialogClient {
    @Autowired
    private Dialog dialog;

    @PostConstruct
    public void init() {
        dialog.setWidth(150); //or read from properties file
        dialog.setHeight(200);
    }
    ...
}

Again, in this case, you can play with the scope atrribute.