Hibernate + Ehcache - IllegalArgumentException 发生调用复合 id 的 getter

Question

在这里搜索了很多，没有找到类似的案例，如果我错了，请见谅。

我的上下文是一个使用 Hibernate 和二级缓存的系统。

以前使用过这些版本（在生产中使用二级缓存启用一年多）：

• hibernate-ehcache-5.0.9.Final
• ehcache-core-2.4.3
• ehcache-2.9.0
• hibernate-core-5.0.9.Final
• 其他...

现在，升级系统，我们将版本改为：

• hibernate-ehcache-5.2.10.Final
• ehcache-2.10.3
• hibernate-core-5.2.10.Final
• 其他...

更新Hibernate和Ehcache版本后开始出现上述异常：

<exception name="IllegalArgumentException occurred calling getter of br.com.mycompany.myproject.mypackage.Employee.id">
    org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of br.com.mycompany.myproject.mypackage.Employee.id
    at org.hibernate.property.access.spi.GetterMethodImpl.get(GetterMethodImpl.java:64)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:230)
    at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4720)
    at org.hibernate.type.EntityType.toLoggableString(EntityType.java:519)
    at org.hibernate.type.TypeHelper.toLoggableString(TypeHelper.java:439)
    at org.hibernate.cache.spi.entry.StructuredCacheEntry.destructure(StructuredCacheEntry.java:54)
    at org.hibernate.event.internal.DefaultLoadEventListener.processCachedEntry(DefaultLoadEventListener.java:612)
    at org.hibernate.event.internal.DefaultLoadEventListener.loadFromSecondLevelCache(DefaultLoadEventListener.java:602)
    at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:462)
    at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:219)
    at org.hibernate.event.internal.DefaultLoadEventListener.doOnLoad(DefaultLoadEventListener.java:116)
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:89)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1230)
    at org.hibernate.internal.SessionImpl.immediateLoad(SessionImpl.java:1088)
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:155)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:259)
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:73)
    at br.com.mycompany.myproject.mypackage.Employee$$_jvstdd0_3.isActive(Employee_$$_jvstdd0_3.java)
    at br.com.mycompany.myproject.mypackage.Test.do(Test.java:30)
    at org.jpos.transaction.TxnSupport.prepare(TxnSupport.java:44)
    at org.jpos.transaction.TransactionManager.prepare(TransactionManager.java:549)
    at org.jpos.transaction.TransactionManager.prepare(TransactionManager.java:615)
    at org.jpos.transaction.TransactionManager.run(TransactionManager.java:291)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@32ed9549
    at sun.reflect.GeneratedMethodAccessor43.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.hibernate.property.access.spi.GetterMethodImpl.get(GetterMethodImpl.java:41)
    ... 23 more
</exception>

我的模型实体（创建示例）：

@Entity
@Table(name = "employee")
@Cache(usage = CacheConcurrencyStrategy.READ_ONLY, region = "myregion")
public class Employee implements Serializable { 

     private static final long serialVersionUID = 8467432396096896736L;

     @EmbeddedId
     private EmployeeID id;

     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "id_company", nullable = false, insertable = false, updatable = false) 
     private Company company;

     gets & sets
     equals & hashcode
     ...
}

@Embeddable
public class EmployeeID implements Serializable { 

     private static final long serialVersionUID = 8467432396096896736L;

     @Column(name = "id_employee", nullable = false, insertable = false, updatable = false)
     private Long idEmployee;

     @Column(name = "id_company", nullable = false, insertable = false, updatable = false)
     private Integer idCompany;

     gets & sets
     equals & hashcode  
     ...
}

---

我验证（进行测试）当休眠尝试从缓存中水合实体时会发生此错误。如果我关闭缓存它的工作。

因此，当回滚版本时，它会在启用缓存的情况下再次运行。

发生这种情况的所有实体都有复合键并且在二级缓存中

Answer 1

您必须调试并检查为什么在水合期间 Hibernate 会抛出 ClassCastException。这可能是一些错误。

但是，我也注意到您的映射有一个奇怪之处。为什么@EmbeddedId属性和@ManyToOne@JoinColumn都设置为insertable = false和updatable = false。

这将导致永远无法坚持和Employee 或更改其Company。

正如我在 this article 中解释的那样，@EmbeddedId 应该插入和更新复合标识符，而 @ManyToOne 应该使用 @MapsId。