Input Form using an EJB DataControl

Hi,
I have a question about how to create an input form in a ADF Faces TopLink app.
First, I created a DataControl over the TopLink mappings, and then I created a JSF page with an Employee form (Im using the HR database), I dropped a Commit button from the DataControl palette, and this works fine.
But now Im reading the ADF Developers Guide, and this document recommends to create a EJB service and a DataControl over the EJB. I did it, and I recreated the same JSF page with an Employee form. I dropped a mergeEntity method from the DataControl palette, and I defined ${bindings.findAllEmployeeIter.currentRow.dataProvider} as the argument of the method. But if I execute the app, and I make a change on the data, the mergeEntity button doesn´t update the database. What am I missing?
Is there any problem in generating the DataControl directly from the TopLink mappings? Is it preferrable to generate the DataControl from an EJB? Why?
Thanks
Juan Claudio Navarro

Juan,
Try asking this in the toplink forum.
TopLink/JPA
The reason to front your TopLink objects with a session facade is for scalability.
So it will also depend on the number of users your application will have.
The TopLink guys will be able to give you more details.

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</executables>
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Edited by: Kronos72it on Oct 6, 2011 6:14 PM
any reply ?

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resolution:
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Is that the only Oracle client installed? If you have another one hanging around it could be using the wrong tnsnames file.

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g.setName();
g.setNovels(new ArrayList<Novel>());
genreDAO.persist(t);
genreName2Object.put(t.getIdentifier(), em.merge(t));
return t;
But honestly I couldn't find a solution which satisfies these 3 points at the same time. For example, using another stateful bean with an extended persistence context (PC) would work for the 1st parsed file, but I have no idea what should happen from the 2nd file on.. Indeed, for the 1st file the PC will be created and propagated from CatalogBuilder to Cache, which will then use the same PC. But after build() returns, the PC of CatalogBuilder should (I guess) be removed and re-created during the succesive parsing, although the PC of Cache should stay "alive": shouldn't in this case an exception being thrown? Another problem is what to do when the Cache bean is passivated. Currently I get the exception:
"passivateEJB(), Exception caught ->
java.io.IOException: java.io.IOException
at com.sun.ejb.base.io.IOUtils.serializeObject(IOUtils.java:101)
at com.sun.ejb.containers.util.cache.LruSessionCache.saveStateToStore(LruSessionCache.java:501)"
Hence, I have no Idea how to implement my cache.. Can you please tell me how would you solve the problem?
Many thanks!
Bye

Hi Chris,
thanks for your reply!
I've tried to add the following into persistence.xml (although I've read that eclipseLink uses L2 cache by default..):
<shared-cache-mode>ALL</shared-cache-mode>
Then I replaced the Cache bean with a stateless bean which has methods like
Genre findGenreCreateIfAbsent(String genreName){
Genre genre = genreDAO.findByName(genreName);
if (genre!=null){
return genre;
genre = //Build new genre object
genreDAO.persist(genre);
return genre;
As far as I undestood, the shared cache should automatically store the genre and avoid querying the DB multiple times for the same genre, but unfortunately this is not the case: if I use a FINE logging level, I see really a lot of SELECT queries, which I didn't see with my "home made" Cache...
I am really confused.. :(
Thanks again for helping + bye

How to combine data from different input forms outside a nested iView

Hi,
i try to combine data from different input forms in a single one.
Because of space reasons in Flex compiling i already use nested iViews. Within these nested iViews its possible to use the 'combine' function to do this.
But in the main iView I cant compose these function with other elements. I need to do this because of using these model in Guided Procedures with output parameters. These parameters I only get with a 'endPoint'. Unfortunatly its not possible to combine data from different input forms into the 'endPoint'.
Is there any solution?
Thanx
Mathias

Hi Scott,
i tried this already and i also tried to map all parameters in the endpoint by drawing lines from the other forms and assign the 'empty parameters' by a formula.
And when i create a collable object in GP and assign the VC iView, only the parameters of the parent-form (the form who trigger the event) are shown as output-parameters.
Maybe any other ideas? I cant believe that such a simple thing is not possible?!?!
In my opinion, thats a bug, that I'am not able to use the combine-operator in the main VC-iView. Whats your mind?
greets
mathias

Input Form using an EJB DataControl

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