orphan

Prevent Hibernate from deleting orphaned entities while merging an entity having entity associations with orphanRemoval set to true

由 送分小仙女□ 提交于 2019-11-28 02:30:52
问题 Taking a very simple example of one-to-many relationship (country -> state). Country (inverse side) : @OneToMany(mappedBy = "country", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true) private List<StateTable> stateTableList=new ArrayList<StateTable>(0); StateTable (owning side) : @JoinColumn(name = "country_id", referencedColumnName = "country_id") @ManyToOne(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType

process re-parenting: controlling who is the new parent

由 跟風遠走 提交于 2019-11-27 15:12:50
Is the new parent always "init" or is there some way to control who gets to be the new parent ? Wikipedia seems indicates that it's always "init". I really hope that this is not the case. I have tried everything I can think of with setpgid and setsid, but no luck. And now that I see this wikipedia article I need advice. In a Unix-like operating system any orphaned process will be immediately adopted by the special init system process. This operation is called re-parenting and occurs automatically. Even though technically the process has the "init" process as its parent, it is still called an

Hibernate deleting orphans when updating collection

由 走远了吗. 提交于 2019-11-27 00:41:11
问题 I'm finding that orphan records aren't being deleted when removing from a collection in Hibernate. I must be doing something simple wrong, (this is Hibernate-101!), but I can't find it.. Given the following: public class Book { @ManyToOne @NotNull Author author; } public class Author { @OneToMany(cascade={CascadeType.ALL}) List<Book> books; } And the following update code: Author author = authorDAO.get(1); Book book = author.getBooks().get(0); author.getBooks().remove(0); authorDAO.update

process re-parenting: controlling who is the new parent

由 二次信任 提交于 2019-11-26 17:06:42
问题 Is the new parent always "init" or is there some way to control who gets to be the new parent ? Wikipedia seems indicates that it's always "init". I really hope that this is not the case. I have tried everything I can think of with setpgid and setsid, but no luck. And now that I see this wikipedia article I need advice. In a Unix-like operating system any orphaned process will be immediately adopted by the special init system process. This operation is called re-parenting and occurs
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