[英]Merging an existing object does not update the changed @Embedded in the database
我正在使用Eclipselink的Amdatu實現來實現OSGI兼容性。
誰能發現為什么這行不通?
下面的類定義為Entity,並且應該保留。 每次對Ptz2PlPalletUnloadOrder進行更新時, OrderRepoImpl中的save方法都會將持久性訂單與更新的版本合並,其中Ptz2PlPalletUnloadDefinition def或OrderState orderState已更改。
無論如何,我可以使用em.merge方法更新數據庫中的orderState,但是我無法更新BD中的@Embedded def Object。 在數據庫中不創建新行的情況下進行更新是高度首選的。
合並對象時,不會引發任何異常,log4j包含在問題的底部。
@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;
}
堅持的班級。
@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;
}
}
通過這種方法制動時,結果值具有正確的值。 因此,人們希望數據庫已經更新,但是當Ptz2PlPalletUnloadOrder
要更新字段是嵌入式對象時,不會發生這種不幸。
[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
我已經在amdatu-jpa測試案例中重現了這一點。
在EclipseLink論壇https://www.eclipse.org/forums/index.php/t/474144/上找到了類似的問題
禁用編織可解決我創建的測試中的問題。 要禁用,請在persistence.xml中添加以下屬性
<property name="eclipselink.weaving" value="false"/>
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