Yes this solved my problem. In the end I decided that managing
transactions manually wasn't as nice as using an EJB so I replaced my
web project that contained a web service provider with an EJB module
project that contains a web service provider (NetBeans 5.5)
Thanks,
Ryan
Ryan de Laplante wrote:
> Thank you!
> So if I get my EntityManager instance by using Persistence.createEMF()
> etc... then I will be able to use the EntityTransaction? I will try
> this first thing in the morning. If this fails, then I will look into
> moving my web service from a web app to an EJB session bean.
>
>
> Ryan
>
>
> Marina Vatkina wrote:
>> In your case NetBeans is probably right. Injecting entity manager
>> directly makes it a container-managed entity manager.
>>
>> See JPA spec sections:
>> 5.5 Controlling Transactions
>> ...
>> A container-managed entity manager must be a JTA entity manager.
>>
>> 5.2.1 Obtaining an Entity Manager in the Java EE Environment
>> A container-managed entity manager is obtained by the application
>> through dependency injection, or direct lookup of the entity manager
>> in the JNDI namespace.
>>
>> You can use UserTransactions to control JTA entity manager, but you
>> need to call em.joinTransaction() after you started it.
>>
>> regards,
>> -marina
>>
>> Ryan de Laplante wrote:
>>> I don't know if NetBeans is buggy or not.. I don't understand what
>>> I'm supposed to do to solve this problem.
>>> I inject the entity manager like this:
>>>
>>> @PersistenceContext(unitName="MyPU")
>>> private EntityManager em;
>>>
>>>
>>> Thanks,
>>> Ryan
>>>
>>>
>>> Marina Vatkina wrote:
>>>
>>>> Hi Ryan,
>>>>
>>>> Removing transaction-type doesn't make a difference - it's JTA by
>>>> default in a Java EE environment. If NetBeans doesn't work
>>>> correctly, please file a bug with NetBeans directly.
>>>>
>>>> How do you get a hold of EM? Do you
>>>> a) call Persistence.createEMF()
>>>> b) inject or look up EMF
>>>> c) inject or look up EM
>>>>
>>>> thanks,
>>>> -marina
>>>>
>>>> Ryan de Laplante wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I have a Java 5 web application who's only purpose is to provide a
>>>>> web service. The web service uses JPA to read an entity from the
>>>>> database, make a change and save it back into the db. Because
>>>>> this is not an EJB, I have to manually begin and commit a
>>>>> transaction for persist() to work.
>>>>>
>>>>> When I do the following, the app server throws an
>>>>> IllegalStateException ("Cannot use an EntityTransaction while
>>>>> using JTA.")
>>>>>
>>>>> EntityTransaction trans;
>>>>> trans = em.getTransaction();
>>>>>
>>>>>
>>>>> I opened my persistence.xml in NetBean's visual editor, unchecked
>>>>> "Use Java Transaction APIs", then saved and redeployed. This did
>>>>> not make a difference. I noticed a transaction-type="JTA"
>>>>> attribute was still on the <persistence-unit> element so I removed
>>>>> it, saved and redeployed. I still get an exception.
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Ryan
>
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