CODEWITHSUNDEEP
jakarta-eecdi
Paneri
Paneri

Reputation: 125

Passing parameter to bean using CDI

I am new to CDI. I can't figure out how convert the following code using CDI. 

Class Client {

  void method(){
    List<Events> events = getEvents();
    I b = new B(events); 
    I c = new C("Hello"); 
  }

 List<Events> getEvents(){
    //Do Something 
    return events;
  }
}

Class B implements I{

 List<Events> events ;

 B(List<Events> events){
    this.events = events; 
  }
}

Class C implements I{

 String s;
  C(String s){
    this.s = s; 
  }
}

I used Qualifiers to avoid ambiguity but can figure out how to pass parameters from the client.Do I need to use producer to inject the List and string into Class B and C respectively?

@Qualifier
@Retention(RetentionPolicy.RUNTIME) 
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
public @interface Ii {
Type value() ;
public enum Type {
      B,
      C 
  }

}


Class Client {
   @Inject @Ii(Ii.type.B)
   B b;
   @Inject @Ii(Ii.type.C)
   C b;

}

@Ii(Ii.type.B)
Class B { 

}

@Ii(Ii.type.C)
Class C {
}

Upvotes: 0

Views: 799

Answers (1)

Lukas Eichler
Lukas Eichler

Reputation: 5903

You need to declare a Producer. 

@Produces @Ii(Ii.type.B)
public void produceB {
  return Ii.type.B;
}

@Produces @Ii(Ii.type.C)
public void produceC {
  return Ii.type.C;
}

In Order to you events you need to annotate the parameter that should create events with @Observes. In the code below you can see how you get a list of fired events. 

@Inject
private List<Event> events;

Upvotes: 2

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