Not really a problem, I was just curious. There are lots of patterns for
creating puesdo-puesdo-random-numbers, and it seems like using the database is
expensive for that function.
It depends on the purpose of the random number and the scale and performance of
the app I guess.It's really
That's what i do, perhaps i didn't explain myself very well. :D
Doing a lookup searching if there is a duplicate it's almost the same (make
a loop, find by the field, catch the "NoSuch..."), almost the same
complicated...
My "only" problem here was to know the exception thrown (in struts 1 i used
On 5/6/10 10:57 AM, Juan Antonio Calderón wrote:
Is not an object "key", is a property in a model java class, an unique
field in the database :)
I have to try it, to know if there is a duplicate field.
Any other way? ;)
You could always try to do a lookup based on that potential unique value
i don't get the problem.
you have an object with a field which is unique
than make the object, save it using a dao, catch the exception.
if it is something with unique constrain than you know...
tibi
Quoting Juan Antonio Calderón :
Is not an object "key", is a property in a model java cla
Is not an object "key", is a property in a model java class, an unique field
in the database :)
I have to try it, to know if there is a duplicate field.
Any other way? ;)
Thanks everybody.
2010/5/6 Dustin Pearce
> Are you generating a random number for the object "key" and then seeing if
> it
i would write a test and see what happens ;)
Quoting Juan Antonio Calderón :
Maybe DataIntegrityViolationException could be used, like in
UserManagerImpl.java?
Thanks.
2010/5/6 Juan Antonio
Hello everybody.
I have a problem.
I generate a random field, that must be unique, and i need
Are you generating a random number for the object "key" and then seeing if its
already there and trying again...and again...? Just curious.
-D
On May 5, 2010, at 7:17 PM, Juan Antonio Calderón wrote:
> Maybe DataIntegrityViolationException could be used, like in
> UserManagerImpl.java?
>
> T
Yes, this is the recommended exception to catch.
2010/5/5 Juan Antonio Calderón
> Maybe DataIntegrityViolationException could be used, like in
> UserManagerImpl.java?
>
> Thanks.
>
> 2010/5/6 Juan Antonio
>
>
>> Hello everybody.
>>
>> I have a problem.
>>
>> I generate a random field, that must
Maybe DataIntegrityViolationException could be used, like in
UserManagerImpl.java?
Thanks.
2010/5/6 Juan Antonio
>
> Hello everybody.
>
> I have a problem.
>
> I generate a random field, that must be unique, and i need to catch the
> exception thrown in the save() method in the DAO.
>
> What is
Hello everybody.
I have a problem.
I generate a random field, that must be unique, and i need to catch the
exception thrown in the save() method in the DAO.
What is the exception thrown? Is an HibernateException, a
RuntimeException...?
I used to catch an ConstraintViolationException, could be
10 matches
Mail list logo
