It could be because OpenJPA does not know about your foreign keys...
You have to tell OpenJPA that there is a foreign key using the
@ForeignKey annotation or instruct OpenJPA to detect the foreign keys
by inspecting your schema. To do this, you have to specify the
following property in your persis
I always use something of the form
"SELECT i FROM Item WHERE i.status = :value"
query.setParameter( "value", ItemStatus.New.ordinal() );
since my enums are materialized as integers in the DB. It is related
to the @Enumerated annotation. Using that annotation, you can specify
that your e
Hi,
Instead of creating a new Department with the ID of the department
that you want to delete, you should use the getReference() method as
such:
Department toRemove = em.getReference( Department.class, "1234" );
em.getTransaction().begin();
em.remove( toRemove );
em.getTransaction().commit();
H
If I recall correctly, the manual says that the @UniqueConstraint is
used to create proper database constraints when OpenJPA creates your
database. Unicity is enforced by database constraints, not by OpenJPA.
Christian
On 10/11/07, Derry Cannon <[EMAIL PROTECTED]> wrote:
> Hey, there!
>
> I've g
Hello,
I ran your test class and it worked fine. Since there is no linkage
between the 1000 instances you are creating, I see no reason for a
stack overflow. I even added some code to link a tabela to its pai
(father, if babel fish is right). That still does not produce a stack
overflow...
Are
A to
> at least avoid the error somehow, which should be sufficient since
> SingletonSet is just an optimization.
>
> -Patrick
>
> On 9/25/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hello!
> >
> > I am getting a strange message when merging an entity.
Hello!
I am getting a strange message when merging an entity. My entity
contains a set of objects of class A. Each of these objects, in turn,
have an attribute that is a set. My entity gets detached, then a
bunch of As get added and every A contains a set. Most of the As will
contain a singlet
it for convenience for the binary download so that people can get
> started easily.
>
> -Patrick
>
> On 9/14/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hello!
> >
> > Do I need to distribute the Derby jar with my application because it
> > is part
Hello!
Do I need to distribute the Derby jar with my application because it
is part of the OpenJPA 0.9.7 distribution?
Included in the distribution is derby-10.2.2.0.jar. I did not include
it in the classpath for testing and I have seen no problem so far. Is
one lurking in the shadows? Am I as
It is a reference to a path defined somewhere else in the build.xml
file. It is typically used when a classpath or a path has to be used
in several places in the file. You can find the doc for this at
http://ant.apache.org/manual/index.html
Click on the Concept and Types link and then click on
As far as I know, you have to tell OpenJPA of the existence of the
foreign keys. You can do that by using the @ForeignKey annotation.
Alternatively, you can add this property to your persistence.xml. It
will tell OpenJPA to discover what it can about foreign keys:
There is also a problem that
persistent classes list,
or all metadata files in classpath directories if you have not listed
your persistent classes. Use -help to display tool usage information.
Is there a verbose mode that I could use to make sure the proper
classes are enhanced?
Thanks!
Christian
On 9/8/07, Christian Defoy
Hello!
I am enhancing my classes at build time and that works fine as far as
I know. My class files get a new timestamp so I guess they are
enhanced. However, when I launch my app, I get
Could not locate metadata for the class using alias "Shape".
Registered alias mappings: "{Shape=null}"
Do I
Hi,
I get an invalid SQL statement when I do the following:
1- create a new instance of C
2- create a new instance of A
3- put a link from C to A
4- load a persistent instance of B
5- detach B
6- put a link from B to A
7- put a link from A to B
8- persist C
When I commit my transaction, I get an
take that approach. You'd just set up a pair of
> one-to-many relations from A to A_B and B to A_B; you wouldn't need to
> do anything special to make it work.
>
> -Patrick
>
> On 9/6/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hello,
> >
>
Hello,
I have two objects, A and B, that are involved in a many to many
relationship. That portion works ok if class A contains:
@ManyToMany( fetch=FetchType.EAGER, cascade=CascadeType.ALL )
@JoinTable( name="a_b", [EMAIL PROTECTED]( name="a_id",
referencedColumnName="a_id" ),
Hi,
It is probably because you do not have a setId() method in your
WebPage class. Since you are using Property access, you must define
setters for every field (or at least that's how I understand it). If
you were using Field access, you wouldn't have that issue.
Hope this helps!
Christian
On
gt; > private Shape shape;
>
> @Column( name="shape_id", insertable=false, updatable=false )
>
> That will tell OpenJPA to not insert or update those columns.
>
> -Patrick
>
> On 8/30/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hello,
> &
Hello,
I have a Shape object that is referred to by an Attachment object.
The ID for Attachment is computed based on the ID of the related Shape
and the database enforces that by having the Attachment.shape_id field
as a computed field.
create table Shape
(
shape_id int identity not null prim
classes anyways, it should be able to do more-eager loading.
>
> It would be interesting to know if things get resolved by putting an
> emf.createEntityManager().close() call somewhere before you do any
> real work in the application.
>
> -Patrick
>
> On 8/23/07, Christian D
ing.
>
> -Patrick
>
> On 8/23/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hi Patrick,
> >
> > Here is the stack trace of the second call to getConnection():
> >
> > java.lang.Exception: Stack trace
> > at java.lang.Thread.dumpStack
ends ShapeCommand
{
..
}
Christian
On 8/23/07, Patrick Linskey <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Can you post a thread dump from the deadlock?
>
> My guess would be that we're using the second connection to fetch an
> ID value from a sequence table. Otherwise, we sho
Hello,
Quick question about connection usage:
I was performing some tests and I noticed that my connection pool was
configured for 10 connections but theoretically, I should need only
one so I set the connection pool size to 1. Now, my application
deadlocks because it appears that getEntityManag
ED]> wrote:
> Hmm. Do they get converted, or wrapped? If it's a complete conversion,
> then we should do something to maintain that information, such as a
> subtype of one of the PersistenceExceptions.
>
> Can you post the full stack trace that you're seeing?
>
gh.
>
> Can you post stacks that correspond to codes that we should also be catching?
>
> -Patrick
>
> On 8/21/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> > Hello,
> >
> > I am looking for a way of programatically detecting whether an
> > except
Hello,
I am looking for a way of programatically detecting whether an
exception was caused by a constraint violation. What is the best way
to do that?
The only way I have found so far is to navigate up the cause chain of
the exception and see if one happens to be an SQLException and if so,
get t
Hi,
To my understanding, this is a typical database behavior. If you
perform massive operations within a single transaction, the db must
account for everything in its log and it must lock all appropriate
rows. In case of a rollback, your db will also have a lot of work to
do...
It is usually po
Hi!
I managed to get around the problem by invoking manager.remove() on my
Attachment object before replacing it with the one. It seems to work
so far...
Prior to that, I was almost successfull by detaching my Shape object
prior to replacing its Attachment object. But then, when the
Attachment
ex3.Attachment
ex3.Note
Hope this sheds some light on the problem!
Christian
On 7/25/07, Patrick Linskey <[EMAIL PROTECTED]> wrote:
Hi,
It sounds like a foreign key ordering problem. What db are you using?
Can you post your persistence.xml properties?
-Patrick
On 7/25/07, Christi
Hello,
For some reason, I am unable to update an object that is already
persisted. Here's how it goes:
I have a Shape object that includes an Attachment. This is already
saved in the database. I update the Shape by replacing its Attachment
object with a new one that contains a Note object:
Kevin
On 7/24/07, Craig L Russell <[EMAIL PROTECTED]> wrote:
>
> This sounds a lot like https://issues.apache.org/jira/browse/OPENJPA-281
>
> Craig
>
> On Jul 24, 2007, at 1:27 PM, Christian Defoy wrote:
>
> > Oups! I forgot to include it:
> >
> > p
uce only one select
> statement...
And ShapeTypes is an enum?
-Patrick
On 7/24/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> Hi Patrick,
>
> I have two classes. I stripped the accessors and mutators to shrink
> them a bit (I am unsure if attachments get stripped or not).
7/24/07, Patrick Linskey <[EMAIL PROTECTED]> wrote:
Can you post the selects that you're seeing and the domain model?
Thanks,
-Patrick
On 7/24/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I just noticed that if I call entityManager.find() to retrieve an
&
Hello,
I just noticed that if I call entityManager.find() to retrieve an
object, many select statements (one per relation) are generated even
though the relations are marked as FetchType.EAGER.
If I use a JPQL query instead, only one select statement is generated.
The JPQL looks like this: "SELE
Hello,
I am looking for a way to filter a set while loading it into an
object. For example, if class Shape contains a reference to a set of
Drawings but the drawings are never deleted from the database but
retired instead. How do I fill the attribute Shape.activeDrawings?
The JPQL-like way of
ues.apache.org/jira/browse/OPENJPA ?
On Jul 20, 2007, at 7:07 AM, Christian Defoy wrote:
> Hi,
>
> I am trying to do a bulk update on entities to set an attribute. This
> attribute is an enum. If I put the enum in the update statement as in
> the following:
>
> UPDATE Sha
Hi,
I am trying to do a bulk update on entities to set an attribute. This
attribute is an enum. If I put the enum in the update statement as in
the following:
UPDATE Shape s SET s.type = :type WHERE s.id = :id
and I set the "type" parameter with:
query.setParameter( "type", ShapeType.SQUARE
l missing objects or one for each. You might want to turn on
> SQL
> logging to check,
>
> ((OpenJPAEntityManager) em).findAll(...)
>
> Hope this helps,
>
> David
>
> Christian Defoy wrote:
>> Hello,
>>
>> I can't find an easy way of retrieving a group
QL statement
for all missing objects or one for each. You might want to turn on SQL
logging to check,
((OpenJPAEntityManager) em).findAll(...)
Hope this helps,
David
Christian Defoy wrote:
> Hello,
>
> I can't find an easy way of retrieving a group of entities by
> specifying
Hello,
I can't find an easy way of retrieving a group of entities by
specifying only their IDs. For example, if I want to get shapes with
IDs 1, 2, 4 and 6, do I have to do the following query or is there a
better way?
SELECT x FROM shape x WHERE x.id = 1 OR x.id = 2 OR x.id = 4 OR x.id = 6
I w
unable to
reach apache.org reliably.
-Patrick
On 7/13/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> I tried with the following annotations:
> @Persistent
> @Type( String.class )
> @Externalizer( "Shape.typesToString" )
> @Factory( "Shape.typesFrom
@Type(String.class) on the field as well.
-Patrick
On 7/13/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> Hi Patrick,
>
> Thanks for the answer. You guess correctly when you say that I want a
> stringified version of my EnumSet. :)
>
> I tried to simply mark it @Persist
into the first case, we'll need to change OpenJPA to allow
bypassing of proxy logic somehow.
Also, we should probably allow field-by-field enabling of a
more-expensive dirty checking strategy so that you don't need to
manually mark the field as dirty.
-Patrick
On 7/13/07, Christian Defoy &l
Hello!
Is there a way to persist an EnumSet easily with OpenJPA? I tried
with an externalizer:
@PersistentCollection
@Externalizer( "test.Shape.typesToString" )
@Factory( "test.Shape.typesFromString" )
@ElementType( String.class )
@Column( name="shape_types" )
private EnumSet
!
Christian
On 7/9/07, Markus Fuchs <[EMAIL PROTECTED]> wrote:
Hi Christian,
I declared the connection properties in persistence.xml. That's the only
difference from your setup. Could you try that?
-- markus.
Christian Defoy wrote:
Hi Markus,
I just tried with OpenJPA 1.0.0-snapshot.
rading!
-- markus.
Christian Defoy wrote:
> Hi Markus,
>
> I am using OpenJPA version 0.9.7. If you think it could help, I will
> try today with nightly build for 1.0.0. I will also give it a try on
> MSSQL as it is the other typ eof database we are using.
>
> When you sa
order? Embedded before main?
Thanks!
Christian
On 7/6/07, Markus Fuchs <[EMAIL PROTECTED]> wrote:
Hi Christian,
I can not reproduce your problem. I ran against Derby, my test
environment and output is attached. Are you using a current OpenJPA
distribution?
-- markus.
Christian Defoy
Hi Markus,
Here is the code to reproduce the problem. I include the source code,
my persistence.xml file and the schema script for my database. As I
mentionned in my first post, I am using Hypersonic (in case it is
important).
Shape.java:
import javax.persistence.*;
@Entity
@Table(name="
Hi again!
This does make sense as I am trying to get the embedded classes to be
mapped in secondary tables. Section 9.1.33 of the spec says that
implementors are not required to support embedded objects that are
mapped across multiple tables. But that part seems to work just fine
with OpenJPA..
s identity is defined by the identity of the
owning record.
Does this make sense in your environment?
-Patrick
On 6/28/07, Christian Defoy <[EMAIL PROTECTED]> wrote:
> Hello!
>
> I am trying to get the existing object model from our system to
> persist correctly with openjpa.
Hello!
I am trying to get the existing object model from our system to
persist correctly with openjpa. Here's the situation.
I have an object A that contains a link to objects B and C. A will
contain either a link to B or a link to C, never to both. I tried two
approaches with openjpa to pers
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