Playing due to HHH-12588, I've discovered that an embeddable object with a blob is not cacheable. Moving the blob to an embeddable object is a workaround to bypass HHH-12555.
{code:java}
@Entity
@Polymorphism(type = PolymorphismType.EXPLICIT)
@Inheritance(strategy = InheritanceType.JOINED)
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE, include = "non-lazy")
public abstract class Base extends DatabaseEntity {
private Set<Attachment> attachments = new LinkedHashSet<>();
@OneToMany(mappedBy = "parent", fetch = FetchType.LAZY)
@Fetch(FetchMode.SUBSELECT)
public Set<Attachment> getAttachments() {
return attachments;
}
public void setAttachments(Set<Attachment> attachments) {
this.attachments = attachments;
}
}
{code}
{code:java}
@Entity
@Cacheable
public class Attachment extends Base {
private Base parent;
@Access(AccessType.FIELD)
@AttributeOverrides(@AttributeOverride(name = "blob", column = @Column(name = "filedata", length = 500 * 1024 * 1024)))
@Basic(fetch = FetchType.LAZY)
private DataHolder data = new DataHolder();
public DataHolder getData() {
if (data == null) {
data = new DataHolder();
}
return data;
}
@ManyToOne(fetch = FetchType.LAZY)
public Base getParent() {
return parent;
}
public void setParent(Base parent) {
this.parent = parent;
}
@Embeddable
public static class DataHolder {
private Blob blob;
@Lob
@Basic(fetch = FetchType.LAZY)
public Blob getBlob() {
return blob;
}
public void setBlob(Blob blob) {
this.blob = blob;
}
}
}
{code}
results in
{noformat}
java.lang.RuntimeException: java.lang.UnsupportedOperationException: Blobs are not cacheable
at org.hibernate.bugs.AbstractTestCase.doInOpenTransaction(AbstractTestCase.java:55)
at org.hibernate.bugs.TestCase.hhh12601(TestCase.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.UnsupportedOperationException: Blobs are not cacheable
at org.hibernate.type.descriptor.java.BlobTypeDescriptor$BlobMutabilityPlan.disassemble(BlobTypeDescriptor.java:51)
at org.hibernate.type.descriptor.java.BlobTypeDescriptor$BlobMutabilityPlan.disassemble(BlobTypeDescriptor.java:36)
at org.hibernate.type.AbstractStandardBasicType.disassemble(AbstractStandardBasicType.java:318)
at org.hibernate.type.ComponentType.disassemble(ComponentType.java:619)
at org.hibernate.type.TypeHelper.disassemble(TypeHelper.java:132)
at org.hibernate.cache.spi.entry.StandardCacheEntryImpl.<init>(StandardCacheEntryImpl.java:53)
at org.hibernate.persister.entity.AbstractEntityPersister$StandardCacheEntryHelper.buildCacheEntry(AbstractEntityPersister.java:5460)
at org.hibernate.persister.entity.AbstractEntityPersister.buildCacheEntry(AbstractEntityPersister.java:4460)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:113)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:478)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:356)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1452)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1438)
at org.hibernate.bugs.TestCase.lambda$hhh12601$1(TestCase.java:25)
at org.hibernate.bugs.AbstractTestCase.doInOpenTransaction(AbstractTestCase.java:50)
... 16 more
{noformat}
To me, it seems that DataHolder is not instrumented properly, I don't see any lazy code in the decompiled class.
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