[eclipselink-users] Error writing collection of entities to the database

[krisusa123 <krisusa123@xxxxxxxxx>]

Hello Guys

Now I have a new problem with my pure JPA implementation.

I am trying to commit a collection (ArrayList of entity objects) rather than an entity object and here is the error I am getting. Can I do this or is it wrong?

 

Code also attached below.

 

Appreciate your help.

 

Exception in thread "main" java.lang.IllegalArgumentException: Object: [com..entities.TestEtl@1da669c, com.entities.TestEtl@186c730, com.entities.TestEtl@17f242c] is not a known entity type.

 

public static boolean saveData(EntityManagerFactory emf, List<xx> Beans ) {

EntityManager entityManager = emf.createEntityManager();

UnitOfWork uow = ((EntityManagerImpl) entityManager).getUnitOfWork();

List<TestEtl> lm = new ArrayList<TestEtl>();

uow.registerAllObjects(lm);

try {

for (int i=0; i< Beans.size(); i++) {

TestEtl load = new TestEtl();

load.setCol1(Beans.get(i).getCol1());

load.setCol2(Beans.get(i).getCol2());

lm.add(load);

} catch (Exception e) {

System.out.println( "Error::" + e);

return false;

} finally {

entityManager.persist(lm);

uow.commit();

entityManager.close();

emf.close();

}

return true;

}

f u cn rd ths, u cn gt a gd jb n cmptr prgrmmng

--- On Tue, 1/20/09, krisusa123 <krisusa123@xxxxxxxxx> wrote:

From: krisusa123 <krisusa123@xxxxxxxxx>
Subject: Re: [eclipselink-users] How to create EclipseLink Sessions, ORM.xml files in J2SE environment
To: "EclipseLink User Discussions" <eclipselink-users@xxxxxxxxxxx>
Date: Tuesday, January 20, 2009, 10:11 AM

Hi Tim

What you said was pretty much true until yesterday. I had got confused between pure JPA solution and EclipseLink specific implementation.

 

But now, I have got the pure JPA solution working. Thanks to you for helping me finish that part.

 

Then I started trying to accomplish the same thing using EclipseLink only API by using sessions.xml and stuff.

 

I am trying to understand how to get the second one (EclipseLink specific one) working. Thats where I got this exception:

 

Exception Description: Missing descriptor for [class com.xx.TestEtl].
Verify that the descriptor has been properly registered with the Session.


f u cn rd ths, u cn gt a gd jb n cmptr prgrmmng

--- On Tue, 1/20/09, Tim Hollosy <hollosyt@xxxxxxxxx> wrote:

From: Tim Hollosy <hollosyt@xxxxxxxxx>
Subject: Re: [eclipselink-users] How to create EclipseLink Sessions, ORM.xml files in J2SE environment
To: "EclipseLink User Discussions" <eclipselink-users@xxxxxxxxxxx>
Date: Tuesday, January 20, 2009, 9:27 AM

Also be aware, the example on my blog uses a pure JPA approach
(mostly) the only native class I use is UnitOfWork. I think Kris is
kind of confused between the two. But just bare in mind, if you're
following my example/my code make sure you realize you're working in a
Pure JPA environment.

./tch



On Tue, Jan 20, 2009 at 9:06 AM, Tom Ware <tom.ware@xxxxxxxxxx> wrote:
> Hi Kris,
>
>  This error generally occurs because for some reason the metadata for your
> TestEtl class is not available to EclipseLink and you are treating it as
> persistent.
>
>  Depending on how you are configured, the metadata can come from different
> places.
>
>  If you are using a pure JPA solution, it will be derived from
Annotations,
> orm.xml and your persistence.xml file.
>
>  If you are using the EclipseLink-proprietary APIs, it will be derived
from
> your sessions.xml and from either your project class or your deployment
> xml(generated with the EclipseLink Mapping Workbench)
>
>  Perhaps you can explain a little more about which of these files you are
> using and what you are doing when you see the error.
>
> -Tom
>
> krisUSA123 wrote:
>>
>> Based on EclipseTeam's suggestions, I was able to create
sessions.xml file
>> and was trying to create a CRUD operation.
>> May I know what this error means:
>>
>> Exception Description: Missing descriptor for [class com.xx.TestEtl].
>> Verify that the descriptor has been properly registered with the
Session.
>>
>> How do I fix it?
>>
>> Appreciate your help.
>> Thanks guys for being responsive to my earlier post.
>>
>> Thanks
>> Kris
>
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