Question

I have code like:

@Entity
@Table(name = "A")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class A
{
  @OneToOne(cascade={CascadeType.ALL}, fetch=FetchType.EAGER, mappedBy="a")
  public B getB() {};
}

@Entity
@Table(name = "B")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class B
{
  @OneToOne(cascade={}, fetch=FetchType.LAZY)
  @JoinColumn(name="A_ID")
  public A getA() {};
}

each time when A is loaded there is query for B. Why is A.getB() not cached after A is loaded and is it possible to cache it?

Answer 1

Workaround that work for me is create additional method with @OneToMany

@OneToMany(cascade={}, fetch=FetchType.EAGER, mappedBy="a")
public Set<B> getBSet() {};

@Transient
public B getB() { return b.iterator().next(); }

I’m not very happy with this solutions, but it works and I can’t find other way.