如何在一次调用中保存父进程和子进程(Hibernate、JPA)

@Entity
public class ParentProcess {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String name;
    
    @OneToMany(mappedBy = "parentProcess", cascade = CascadeType.ALL)
    private List<ChildProcess> childProcesses;
    
    // 省略构造方法、getter和setter
}

@Entity
public class ChildProcess {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String name;
    
    @ManyToOne
    @JoinColumn(name = "parent_process_id")
    private ParentProcess parentProcess;
    
    // 省略构造方法、getter和setter
}

// 在调用中保存父进程和子进程
ParentProcess parentProcess = new ParentProcess();
parentProcess.setName("Parent Process");

ChildProcess childProcess = new ChildProcess();
childProcess.setName("Child Process");
childProcess.setParentProcess(parentProcess);

parentProcess.setChildProcesses(Collections.singletonList(childProcess));

// 保存到数据库
EntityManager entityManager = // 获取EntityManager对象
entityManager.getTransaction().begin();
entityManager.persist(parentProcess);
entityManager.getTransaction().commit();