休眠試圖序列化標記爲@Transient的字段

Question

我試圖堅持一套我將相對簡單的對象稱爲數據庫。不幸的是，Hibernate似乎忽略了@Transient註解（或者它試圖序列化，即使有註釋）在我的幾個類上。當我有無法序列化的類時，這會導致一個令人討厭的錯誤。

如果需要，我可以使AxisEventHandler類可序列化，但是如果我不能（例如它是封閉源庫中的最終類），那麼我該怎麼做？

我可以提供更多關於GenericEventHandler類的信息，或者我根據請求爲了簡潔而註釋掉的任何代碼（但我不認爲它們特別重要......我可能是錯的）。

例外：

org.hibernate.type.SerializationException: could not serialize 
    at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:139) 
    at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:164) 
    at org.hibernate.util.SerializationHelper.clone(SerializationHelper.java:95) 
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor$SerializableMutabilityPlan.deepCopyNotNull(SerializableTypeDescriptor.java:54) 
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor$SerializableMutabilityPlan.deepCopyNotNull(SerializableTypeDescriptor.java:42) 
    at org.hibernate.type.descriptor.java.MutableMutabilityPlan.deepCopy(MutableMutabilityPlan.java:58) 
    at org.hibernate.type.AbstractStandardBasicType.deepCopy(AbstractStandardBasicType.java:314) 
    at org.hibernate.type.AbstractStandardBasicType.deepCopy(AbstractStandardBasicType.java:310) 
    at org.hibernate.type.TypeHelper.deepCopy(TypeHelper.java:68) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:302) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203) 
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210) 
    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195) 
    at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) 
    at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697) 
    at com.mypandafinance.amino.gui.ccsimple.CCSimpleApp.initApplication(CCSimpleApp.java:55) 
    at com.mypandafinance.amino.AminoBoot.main(AminoBoot.java:101) 
Caused by: java.io.NotSerializableException: com.mypandafinance.chartcomponent.eventhandlers.AxisEventHandler 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180) 
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528) 
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493) 
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416) 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174) 
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528) 
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493) 
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416) 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174) 
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528) 
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493) 
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416) 
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174) 
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346) 
    at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:135) 
    ... 21 more 

中軸類：

@Entity 
@Inheritance(strategy=InheritanceType.JOINED) 
public abstract class Axis implements Serializable { 
    private int axisId; 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    public int getAxisId() { return axisId; } 
    protected void setAxisId(int id) { this.axisId = id; } 

    @Transient 
    public abstract long getMax(); 
    public abstract void setMax(long max); 

    @Transient 
    public abstract long getMin(); 
    public abstract void setMin(long min); 

    /* ... helper methods here */ 

    @Transient 
    public abstract AxisEventHandler getEventHandler(); 

    @Transient 
    public abstract AxisFlagHandler getFlagHandler(); 

    @Transient 
    public abstract TickMarkFormatter getTickMarkFormatter(); 
    public abstract void setTickMarkFormatter(TickMarkFormatter formatter); 
} 

基本實現：

@Entity 
@SecondaryTable(name="BasicAxis") 
public class BasicAxis extends Axis { 
    private long min; 
    private long max; 

    // Event handler, used for firing off events to all listeners 
    private AxisEventHandler eventHandler = new AxisEventHandler(); 

    // Flag handler, used for storing axis flags 
    private SerializableAxisFlagHandler flagHandler; 

    private TickMarkFormatter formatter; 

    /* ... constructors */ 

    @Column(name="rangemax") 
    @Override public long getMax() { return max; } 
    @Override public void setMax(long max) { /* ... */ } 

    @Column(name="rangemin") 
    @Override public long getMin() { return min; } 
    @Override public void setMin(long min) { /* ... */ } 

    @Override public void setRange(long min, long max) { /* ... */ } 
    @Override public void pan(long amount) { /* ... */ } 

    @Transient 
    @Override public AxisEventHandler getEventHandler() { /* ... */ } 

    @Type(type="com.mypandafinance.chartcomponent.hibernateusertypes.AxisFlagHandlerUserType") 
    @Column(name="flags") 
    @Override public SerializableAxisFlagHandler getFlagHandler() { /* ... */ } 
    protected void setFlagHandler(SerializableAxisFlagHandler flagHandler) { /* ... */ } 

    @Column(name="formatter", table="BasicAxis") 
    @Override public TickMarkFormatter getTickMarkFormatter() { /* ... */ } 
    @Override public void setTickMarkFormatter(TickMarkFormatter formatter) { /* ... */ } 

    /* ... helper methods */ 
} 

AxisEventHandler類：

public class AxisEventHandler extends GenericEventHandler<AxisEventListener> { 
    public AxisEventHandler() { super(new AxisEventListener[0]); } 
} 

Answer 1

沒關係，我似乎犯了一個錯誤，現在回想起來，不應該花幾個小時才能弄明白。問題不在於Hibernate，或與Hibernate有關的任何事情（除了Hibernate使用標準的Java序列化）。

不僅做字段需要被打上JPA @Transient批註，但他們也需要短暫的Serializable接口（因爲，出於某種原因休眠堅持他們之前序列化對象？）

修復：

public class BasicAxis extends Axis { 
    /* ... */ 
    private transient AxisEventHandler eventHandler = new AxisEventHandler(); 
    /* ... */ 
} 

Answer 2

這只是發生在我身上，我也失去了幾個小時。在添加transientJava修飾符時，我擺脫了直接的錯誤，但是我一直保持越來越奇怪的序列化錯誤，直到最終Hibernate抱怨說它無法將我的對象的二進制表示插入到字段中（因爲它太長了：

？

Caused by: org.h2.jdbc.JdbcBatchUpdateException: Value too long for column 

真正的問題我不小心搞砸了一個JPA註解我這樣做：

@Column(name = "val_foo") 
private Foo val; 

取而代之的是：

@OneToOne(targetEntity = FooImpl.class, cascade = { PERSIST }) 
@JoinColumn(name = "val_foo", referencedColumnName = "uuid") 
private Foo val; 

希望這有助於某人某一天...