Old object in memory (mysql, spring 3, sleep mode)

Question

I use Spring 3, Hibernate 3.3.1 and MySQL 5.1.x (in red hat 5 they also see the same behavior as in Windows). I notice that the row in the database is being updated, but one of the references to objects in memory is not being updated. I will try to describe the structure of the class in a simplified form.

class A {
  @OneToMany(cascade = CascadeType.ALL)
  List<Widget> widgets;

  @OneToMany(cascade = CascadeType.ALL)
  @Cascade(value = org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
  List<B> bObjects;

  @Transactional
  public void turnOnWidgets() { ... }
}

class B {
  @ManyToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH })
  @Cascade(value = { org.hibernate.annotations.CascadeType.LOCK, org.hibernate.annotations.CascadeType.EVICT})
  private A aObj;

  @Transactional(propagation=Propagation.REQUIRES_NEW)
  public void turnOnWidgets() { 
    for (Widget w : aObj.getWidgets()) {
      w.setOn(true);
    }
  }
}

class Widget {
  Boolean on;
}

Here is the sequence of actions. When A.turnOnWidgets is called, it iterates through its "bObjects" collection and calls "turnOnWidgets" for each object B. Object B changes the "on" property for each widget referenced by object A (as shown above in B.turnOnWidgets) .

, , "on" . , , , B A (, A , - Java), A, "turnOnWidgets", .

, , , A, Widgets "on" . , , B.aObj.getWidgets(), "on" true.

Oracle, , MySQL, .

- , - MySQL (, Hibernate / Spring)?

UPDATE , , "" JPA "B". oracle , MySQL . , .

Answer 1

, , mappedBy, :

@OneToMany(cascade = CascadeType.ALL, mappedBy = "aObj")
@Cascade(value = org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
List<B> bObjects;

Answer 2

, db , , , , .

, (JPA, MySQL, Spring Framework Hibernate)