Transaction recovery

[breako]

Hi,
I am using SEAM Managed EntityManager with FushMode set to Manual for a JTA datasource.
When I flush the EntityManager for some invalid update, I get a database exception.
I catch this exception, the entity I am updating is still attached and I try to correct the invalid data and then try to reflush the update. However I can't persist the change even though this time it is valid. I get a javax.persistence.TransactionRequiredException: no transaction is in progress exception.
I am wondering is there any way I can recover from transaction failure?
My code is below.

@Name("manager")
@Scope(CONVERSATION)
public void SeamPOJO {
 @In
 private EntityManager em;

 @End
 public String commit () {
 // Create entity
 Person person = new Person();
 // set invalid data
 person.setName("namethatistoolong");
 em.persist(person);
 try {
 em.flush();
 } catch (Exception e) {
 // data is invalid correct it
 person.setName("john");
 em.flush();
 }
 }

~any advice, comments appreciated. Thanks

[pmuir]

After an exception occurs in the persistence layer, the transaction is unusable. You need a new transaction at this point. You should pre validate your data probably.

[breako]

After an exception occurs in the persistence layer, the transaction is unusable. You need a new transaction at this point. You should pre validate your data probably.

I have some corner cases where I can't pre validate data. I would therefore need to start a new transaction. How do I that if I am using to this approach?