Which message passing method is suitable if a value need to be passed between many objects?

Question

So I have a scenario where a value id need to be passed between different objects but instantiation of each objects is in hierarchical order.

For example:

ObjA 
  - Gets and id from web service
  Instantiate ObjB - (Obj A passes id to Obj B while instantiating)
     - Obj B instantiates Obj C (Obj B passes id to Obj C while instantiating)

And it goes on to 5-6 level of message passing and hierarchical object instantiation.

But message passing between objects while instantiating seems redundant. So I am thinking would it be better if I make an singleton class and every objects access the same value in a singleton? Or is there better way?

Answer 1

Perhaps all your objects could extend a common interface. lets say

Interface SomeObject{}

Now at the top most layer, you can create a List

final List<SomeObject> objects = Arrays.asList(new Object1(), new Object2() and so on);

Now when you get the ID, you can run (using this list will also maintain the order of setting Ids if that is important.

for(SomeObject obj: objects){
    obj.setId(ID);
}

or you could use a stream to get it done in fewer lines of code.