CODEWITHSUNDEEP
springspring-boot
Phate
Phate

Reputation: 6612

Is it possible to define an autowired list of interfaces via annotation?

I want to implement a dispatcher in spring boot, with this simple code:

public class MyDispatcher{

   @Autowired
   private List<MyListener> listeners;

   public void dispatch(){
      listeners.foreach(listener -> listener.dispatch());
   }

Would it be possible to add each listener I define in the above list? Each listener would do something like:

@Component
public class AListener implements MyListener{
     ....

Upvotes: 0

Views: 44

Answers (2)

Rauf Aghayev
Rauf Aghayev

Reputation: 300

Yes, you can define it with varargs. For example:

public interface A {}
@Component
public class B implements A{}
@Component
public class C implements A{}

public class D {
private final List<A> listeners;
@Autowired
public D(A ... listeners) {
 this.listeners = Arrays.asList(listeners);
}  
public void dispatch(){
  listeners.foreach(listener -> listener.dispatch());
}
}

Upvotes: 2

Fermi-4
Fermi-4

Reputation: 729

Yes it should work.

Here's a link - scroll to 5. Injecting Bean References

Upvotes: 0

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