Hibernate Bi-Directional ManyToMany Updates with Second Level cache

Question

I have a bidirectional many-to-many class:

public class A{
 @ManyToMany(mappedBy=\"listA\")
 private List listB;
}
public class B{
 @ManyToMany
 private         


        

Answer 1

Are you setting both sides of your bidirectional link between A and B correctly? A typically approach is to use defensive methods like this:

public class B {
    @ManyToMany
    private List listA;

    public void addToListA(A a) {
        this.listA.add(a);
        a.getListB().add(this);
    }

    public void removeFromListA(A a) {
        this.listA.remove(a);
        a.getListB().remove(this);
    }
}