Hi All,

The following question might sound dumb but I'll ask it anyway. how can I catch
org.hibernate.exception.ConstraintViolationException
exceptions if I'm using JPA?

In facade bean I have an Insert method that persists the object, something like:

public void insertObject(Object entity) {
try {
em.persist(entity);
} catch (javax.persistence.EntityExistsException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalStateException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalArgumentException e) {
System.err.println(e.getMessage());
} catch (javax.persistence.TransactionRequiredException e) {
System.err.println(e.getMessage());
}
}

if I add a catch block like:

catch (org.hibernate.exception.ConstraintViolationException e){
// do something
}

the exception isn't catch, so how can I do to catch this exception?

Thanks

The exception which is thrown is a javax.persistence.RollbackException, and only has ConstraintViolationException as cause. So you have to catch the RollbackException.

Rating is welcome. ;-)

You already have 59 isn't that enough? :-) just kidding

Let me test it (although I'm sure it will work fine).

Thanks

Where do I put the catch block? In the insertObject in facade bean, like:

public void insertObject(Object entity) {
try {
em.persist(entity);
} catch (javax.persistence.EntityExistsException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalStateException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalArgumentException e) {
System.err.println(e.getMessage());
} catch (javax.persistence.TransactionRequiredException e) {
System.err.println(e.getMessage());
}
} catch (javax.persistence.RollbackException e) {

}
}


or in the method calling the insertObject method in my backing bean?

Anyway it doesn't work regardless of were I put it.

Thanks :-)

Where you put it depends on where you want to catch it and how you handle it.

Are you sure it is not catched? Since you have an empty catch-block I guess you still see your exception in the log. That could be, because Hibernate still logs the exception.

In order to check if it is really catched, add System.out.println("---CATCHED---"); or something like that to the catch-block.

sorry for the delayed reply I've tried all different combinations but I still can't catch the exception. here's what I have now:

facade
=====

public void insertObject(Object entity)
throws javax.transaction.RollbackException {
try {
em.persist(entity);
} catch (javax.persistence.EntityExistsException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalStateException e) {
System.err.println(e.getMessage());
} catch (java.lang.IllegalArgumentException e) {
System.err.println(e.getMessage());
} catch (javax.persistence.TransactionRequiredException e) {
System.err.println(e.getMessage());
}
}

client
====

try {

beanRemote.insertObject(cmk);

} catch (javax.transaction.RollbackException e) {
System.err.println("transaction.RollbackException");
System.err.println(e.getMessage());
} catch (javax.persistence.RollbackException e) {
System.err.println("persistence.RollbackException");
System.err.println(e.getMessage());
} catch (Exception e) {
System.err.println("Exception");
System.err.println(e.getMessage());
}

the output is:

Exception
javax.transaction.RollbackException: [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] Can't commit because the transaction is in aborted state

so the Exception catch block is the catching the error.

Am I doing things right here?

hmm, really looking weird, as you explicitly catch a javax.transaction.RollbackException, which is thrown. Are the linenumbers of your stack trace correct?