Roger Keays created OPENJPA-2262:
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Summary: Merging Deserialized Objects Reports Duplicate IDs
Key: OPENJPA-2262
URL: https://issues.apache.org/jira/browse/OPENJPA-2262
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 2.0.0
Environment: Java 1.6, Postgres
Reporter: Roger Keays
OPENJPA-792 patched a defect where putting @Id in the superclass caused primary
key conflicts in the subclasses.
https://issues.apache.org/jira/browse/OPENJPA-792
I get the same error described in OPENJPA-792 when merging a deserialized
instance of an object from my domain model. I can reproduce the problem with
some objects in my domain model but not other (although the all have the same
superclass which contains the @Id field).
This only occurs after deserialization and closing and opening the
EntityManager.
My failing unit test looks like this.
public void canMergeEntitiesWithMatchingIDAfterSerialization() throws
IOException, ClassNotFoundException {
// setup id sequences
Long id = System.currentTimeMillis();
EntityManager em = DB.getPersistenceContext();
em.getTransaction().begin();
em.createNativeQuery(
"SELECT setval('cms_content_id_seq', " + id + ");")
.getResultList();
em.createNativeQuery(
"SELECT setval('web_blobs_id_seq', " + id + ");")
.getResultList();
// persist with same id
Server server = newServer();
Content c = ContentTest.createValid(server);
Blob b = BlobTest.createValid(server);
em.persist(c);
em.persist(b);
em.getTransaction().commit();
assertNotNull(c.getId());
assertNotNull(b.getId());
assertEquals(c.getId(), b.getId());
// serialize and deserialize the object
File file = File.createTempFile("blob", "bin");
ObjectOutput out = new ObjectOutputStream(new
FileOutputStream(file));
out.writeObject(b);
out.close();
ObjectInputStream in = new ObjectInputStream(new
FileInputStream(file));
b = (Blob) in.readObject();
in.close();
// reopen db session and try to merge an update
em.close();
em = DB.getPersistenceContext();
em.merge(b); // EntityExistsException
}
And the stacktrace is
<openjpa-2.2.0-r422266:1244990 nonfatal store error>
org.apache.openjpa.persistence.EntityNotFoundException: Attempted to attach
instance "1347912956793" of type "class ox.webcore.blobs.Blob", but this
instance is already in the datastore as type "class ox.cms.content.Content".
FailedObject: ox.webcore.blobs.Blob@162e703
at
org.apache.openjpa.kernel.VersionAttachStrategy.attach(VersionAttachStrategy.java:118)
at
org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:252)
at
org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:105)
at org.apache.openjpa.kernel.BrokerImpl.attach(BrokerImpl.java:3474)
at
org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1214)
at
org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:878)
at
ox.webcore.util.DB$DBTest.canMergeEntitiesWithMatchingIDAfterSerialization(DB.java:145)
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