How to initialize Spring bean with dynamic arguments at run-time which is not prototype bean?

Question

I'm trying to initialize Spring bean with request scope, and lazy initialization from another object (attributes) that are not managed by Spring. Here is the bean definition :

@Component
@Scope(value = "request")
@Lazy
public class LazyClass {

 protected String name;

}

How do I init the 'name' attribute at runtime ?

Did you try this "@Autowire @Lazy private LazyClass lazyClass" ? — mubeen, May 16 '18 at 12:05
I don't understand, why do we need 'private' access modifier ? — sharon182, May 16 '18 at 12:08
I don't need to inject this class (bean), but to initialize it. — sharon182, May 16 '18 at 12:08
I think this answer solve your problem https://stackoverflow.com/a/30532741/2950010 — mubeen, May 16 '18 at 12:18
No. the "name" attribute in my case is not a bean and I need to initialize it at run-time, not via static XML file or configuration java file. — sharon182, May 16 '18 at 12:25
Add setter for that property and call that setter when you need to set new value for that property — Ivan, May 16 '18 at 15:58
Ok. That's what I was doing. But I thought maybe there might another way — sharon182, May 16 '18 at 16:15

thunder197 · Answer 1 · 2018-05-16T16:00:45.657

It may not be the best solution but you can set the value of name into a System property and get it where you need it in your class.

Setting the value somewhere in a non-spring class:

// myProperty is the name of the property
// name is the value you want to store
System.setProperty("myProperty",name);

Getting inside your class:

// Caution: the name of the property must be the same as it was when it was set
String name = System.getProperty("myProperty);

The getting method can be called in the constructor of your bean class as it is marked as @Lazy.

EDIT:

Another way is to create a setter for the field name and set its value when you need it.

How to initialize Spring bean with dynamic arguments at run-time which is not prototype bean?

1 Answers1