How to create class affinity?

[blasteralfred]

Hi,

I have 3 java classes ClassA, ClassB, ClassC.

ClassA{
        int idA;
        String stringA;
        public ClassA(){}
        public ClassA(int idA,String stringA){
                this.idA=idA;
                this.stringA=stringA;
        }
        public int getidA(){
                return idA;
        }
        public String getstringA(){
                return stringA;
        }
}

ClassB{
        int idB;
        String stringB;
        public ClassB(){}
        public ClassB(int idB,String stringB){
                this.idB=idB;
                this.stringB=stringB;
        }
        public int getidB(){
                return idB;
        }
        public String getstringB(){
                return stringB;
        }
}

ClassC{
        int idC,idB;
        String stringC;
        public ClassC(){}
        public ClassB(int idB,int idC,String stringC){
                this.idC=idC;
                this.stringC=stringC;
        }
        public int getidC(){
                return idC;
        }
        public String getstringC(){
                return stringC;
        }
}

I want ClassA in replicated mode and B & C in partitioned mode. ClassC is
related to ClassB. The id of ClassB is present in ClassC (acting like a
foreign key). Say, I have 3 nodes, 30 ClassA objects, 30 ClassB objects and
30 ClassC objects. They are distributed in nodes like below;

Node 1 => ClassA->30, ClassB->10,ClassC->8
Node 2 => ClassA->30, ClassB->5,ClassC->3
Node 3 => ClassA->30, ClassB->15,ClassC->19

Objects of ClassC related to ClassB should present in same node. I know that
there is some mechanism AffinityKey, but I don't know how to implement this.
Could somebody tell me how to do this?

Thanks in advance..



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