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Re: JSF/JPA problem

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From	Arved Sandstrom <asandstrom3minus1@eastlink.ca>
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Subject	Re: JSF/JPA problem
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On 11-09-13 05:24 PM, Arved Sandstrom wrote:
> On 11-09-13 01:19 PM, markspace wrote:
>> Hi all, I'm playing around with JSF and JPA on a personal project and
>> I've got a problem I haven't been able to figure out.  Basically no
>> matter what I do in a certain bit of code, I always get a JPA error that
>> there is no transaction available for the current thread.
> [ SNIP ]
> 
> You're using application-managed entity managers because of your use of
> an EntityManagerFactory. You must therefore use EntityTransaction.
> 
> If you want container-managed then inject with @PersistenceContext, and
> specify JTA in your persistence.xml (Note: with application-managed
> you'd typically have RESOURCE_LOCAL).
> 
> AHS
> 
I should elaborate: if you're in a JTA environment there is also the
option of using UserTransaction with your application-managed EMs (see
http://download.oracle.com/docs/cd/E19798-01/821-1841/bnbra/index.html)

This is not something that I have found myself doing personally: I
either use application-managed EMs with the EntityTransaction API (hence
RESOURCE_LOCAL), or container-managed EMs with container-managed JTA
transactions.

On a side note: if you're Java EE 6 (and judging by the
"postBean.createNewPost()" maybe you are) then you might want to use CDI
and the @Named and @Inject annotations rather than @ManagedBean and
@ManagedProperty. With a Java EE 6 server (like Glassfish 3) you'll have
the Weld reference implementation of CDI included most likely, and all
you have to do is set up a beans.xml file in your WEB-INF to kickstart it.

HTH,
AHS

-- 
job creator: US Republican term for a wealthy party contributor

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Thread

JSF/JPA problem markspace <-@.> - 2011-09-13 09:19 -0700
  Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-13 17:24 -0300
    Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-13 17:40 -0300
      Re: JSF/JPA problem markspace <-@.> - 2011-09-13 15:38 -0700
        Re: JSF/JPA problem markspace <-@.> - 2011-09-13 17:06 -0700
          Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-13 22:28 -0300
            Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-13 22:31 -0300
              Re: JSF/JPA problem markspace <-@.> - 2011-09-13 19:27 -0700
                Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-14 05:59 -0300
            Re: JSF/JPA problem markspace <-@.> - 2011-09-14 10:36 -0700
              Re: JSF/JPA problem Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-14 17:51 -0300
      Re: JSF/JPA problem markspace <-@.> - 2011-09-13 16:12 -0700

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