[英]Merging an existing object does not update the changed @Embedded in the database
我正在使用Eclipselink的Amdatu实现来实现OSGI兼容性。
谁能发现为什么这行不通?
下面的类定义为Entity,并且应该保留。 每次对Ptz2PlPalletUnloadOrder进行更新时, OrderRepoImpl中的save方法都会将持久性订单与更新的版本合并,其中Ptz2PlPalletUnloadDefinition def或OrderState orderState已更改。
无论如何,我可以使用em.merge方法更新数据库中的orderState,但是我无法更新BD中的@Embedded def Object。 在数据库中不创建新行的情况下进行更新是高度首选的。
合并对象时,不会引发任何异常,log4j包含在问题的底部。
@Entity(name = Ptz2PlPalletUnloadOrder.TABLE_NAME)
@Table(name = Ptz2PlPalletUnloadOrder.TABLE_NAME)
public class Ptz2PlPalletUnloadOrder implements Order {
public static final String TYPE = "ptz2pl.pallet.unload";
public static final String TABLE_NAME = "order_ptz2pl_pallet_unload";
// Order ID
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long dbId;
@Temporal(TemporalType.TIMESTAMP)
private Date created = new Date();
// States
@Enumerated(EnumType.STRING)
private OrderState orderState = OrderState.NEW;
@Embedded
private Ptz2PlPalletUnloadDefinition def;
}
坚持的班级。
@Embeddable
public class Ptz2PlPalletUnloadDefinition {
@Embedded
private Station station;
private volatile Integer agvId;
private volatile String agvSystemName;
@Temporal(TemporalType.TIMESTAMP)
private Date deadLine;
private String userId;
private Long palletType;
private Ptz2PlPalletUnloadDefinition() {
}
}
@Transactional
@Component(provide = ManagedTransactional.class)
public class OrderRepoImpl implements OrderRepo, ManagedTransactional {
private EntityManager em;
@Override
public Ptz2PlPalletUnloadOrder save(Ptz2PlPalletUnloadOrder order) {
Ptz2PlPalletUnloadOrder result = em.merge(order);
return result;
}
}
通过这种方法制动时,结果值具有正确的值。 因此,人们希望数据库已经更新,但是当Ptz2PlPalletUnloadOrder
要更新字段是嵌入式对象时,不会发生这种不幸。
[EL Finer]: 2016-02-09 15:25:32.393--ServerSession(1465675217)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--client acquired: 2038620953
[EL Finer]: 2016-02-09 15:25:32.393--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--TX binding to tx mgr, status=STATUS_ACTIVE
[EL Finer]: 2016-02-09 15:25:32.394--ClientSession(2038620953)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--acquire unit of work: 769186
[EL Finest]: 2016-02-09 15:25:32.395--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--Merge clone with references Ptz2PlPalletUnloadOrder [id=1, orderState=QUEUED, location=Location [stationId=10, systemName=BEING], allocatedAgvId=null, allocatedAgvSystemName=null]
[EL Finer]: 2016-02-09 15:25:37.014--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--TX beforeCompletion callback, status=STATUS_ACTIVE
[EL Finer]: 2016-02-09 15:25:37.015--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--begin unit of work commit
[EL Finer]: 2016-02-09 15:25:37.016--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--TX afterCompletion callback, status=COMMITTED
[EL Finer]: 2016-02-09 15:25:37.017--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--end unit of work commit
[EL Finer]: 2016-02-09 15:25:37.018--UnitOfWork(769186)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--release unit of work
[EL Finer]: 2016-02-09 15:25:37.019--ClientSession(2038620953)--Thread(Thread[pool-7-thread-4,5,Configuration Admin Service])--client released
我已经在amdatu-jpa测试案例中重现了这一点。
在EclipseLink论坛https://www.eclipse.org/forums/index.php/t/474144/上找到了类似的问题
禁用编织可解决我创建的测试中的问题。 要禁用,请在persistence.xml中添加以下属性
<property name="eclipselink.weaving" value="false"/>
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