Hi all,
Months of waiting have paid:
I finally managed to update the website.
Our old home at Jakarta is now removed and does only contain a
forwarding to the new db.apache.org site.
Please use the new site at http://db.apache.org/ojb and report all
inconsistenties you may find.
cheers,
Thomas
We are doing a query on an object which has a 1:1 reference to another
object. The other object is the base class of a table which has an extent
with 6 variant classes. We are using an ojbConcreteClass to store the class
type in the table. The object we are doing a query on is also an extent.
Our
I had to do this to make other xerces work with resin (stick it in the
bottom of resin.conf:
Ryan
-Original Message-
From: Klaasjan Brand [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 13, 2003 9:06 AM
To: OJB Users List
Subject: Re: problems loading repository.xml using resin
I've experienced a weird problem in my servlet environment (caucho resin
1.2.6, RH8, sql server 2k, 0.9.7 using PB API) with the sequence
manager. Until recently my application has run on 1 application server,
with a grab size of 10 for sequences (I'm using the HI_LO seq manager)
which was working
Charles,
http://db.apache.org/ojb/tutorial3.html#using%20proxy%20classes
discusses the use of proxies in detail.
Yes and now on the nth reading it is starting to make sense. I had seen
the proxy stuff for collections but missed it for singles.
Our Object model couldn't support that (not in a
Jakob,
Many thanks. I am starting to get this worked out now.
I now have this relationship working OK and am working on
a) making it lazy by using VirtualProxy
b) getting the collection relationship working in the opposite
direction, first without proxy and then with proxy.
Thank for your hel
hi david,
in the reference-descriptor foreignkey you have to use a field defined
in the same class-descriptor as the reference-descriptor.
the class-descriptor for state lacks the field 'countryStateId' as
indicatet in the stack trace.
class="org.visres.contact.data.State"
t
Ok I figured out the missing link. The missing link is that when you
have a fk reference in one table to another the other table needs to
have a collection with an inverse fk to the first since in the example
I gave originally I had a many to one relationship between brokers and
homes, many ho
That makes some sense to me. We're using ODMG, and I noticed this
happening on "supporting objects" (i.e., not an object *I* locked). Which
layer is responsible for determining all the objects that need to be
written? ODMG or PB?
David
|-+--->
| |
hi all,
forgot to mention that the custom CollectionProxy class must provide a
constructor with the same signature as ListProxy does:
public MyCustomCollectionProxy(PBKey aKey, Class aCollClass, Query aQuery)
...
jakob
Jakob Braeuchi wrote:
hi all,
the class to be used for CollectionProxy c
Hi David,
[EMAIL PROTECTED] wrote:
Can someone explain the WHY behind this code fragment? It's from
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.store(Object). I
thought there was a state kept, to determine if it's an insert or new.
The PB is a very low level kernel. It does not track
hi all,
the class to be used for CollectionProxy can now be configured in
OJB.properties:
...
#
# CollectionProxy class
#---
Well, after severe hair pulling and teeth gnashing. I've found a bug. I
don't know if it's OJB or the oracle driver. Here's what happens:
Here's the brunt of the problem - I turn off batch-mode in my connector,
but OJB ignores that essentially, and turns it on later when the driver's
metadata
Hi David,
David Mitchell wrote:
I have a question regarding report queries.
What is the purpose of having to provide a OJB persistent class reference
when supplying the query code that will be
executed? I can see why you need to provide the following String array with
the names of the fields
Can someone explain the WHY behind this code fragment? It's from
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.store(Object). I
thought there was a state kept, to determine if it's an insert or new.
Having to load the object from the database just to write it back out seems
very wasteful.
We have some interest in per class caching behavior. For example, class Person uses
cache, class Group uses cache, etc.
Any examples of actually using MetaObjectCacheImpl or is it just provided as an
example implementation? Believe we can use it providing we have our own CacheFactory
and a s
now I'm confused.
let's recap:
- objects are related based on foreign keys, right?
- you can load objects in ojb based on any value, either in PB or in odmg, so a select
myclass where myclass.somerelatedobject.someattribute=? will work. OJB will generate
the appropriate joins for you. queries ca
Does anybody else have P6Spy working with 0.9.9 and Tomcat? I have had it
working with 0.9.7 and 0.9.8, as well as with various intermediate bits from the
CVS HEAD. But now that I've upgraded to 0.9.9, I don't get any output in my
spy.log (actually, I get a bunch of startup messages in there,
Hi again Stefan,
Stefan Schlösser wrote:
On 13 Feb 2003 at 12:21, Mahler Thomas wrote:
getCount does exist for OJB internal purposes.
I hope this does not mean it will be deleted from the interface at
some point ...
We have a long tradition not to remove existing methods from public
inter
Ok, I guess I pretty much understand it. You use the reference name to do a
lookup on the referenced object. So if I want to join two tables on
something other than a primary key, I need to use a hand-written sql query.
Im okay with that.
I believe I will also have to use hand-written sql for my
the docs may not be clear, but the examples are pretty clear.
you have to map the field first:
example:
<--- a conversion (optional)
then the referenced object:
<-- the java type
<-- the field-descriptor name that
will be used to find the foreign key value.
now, the class you are
To tell you the truth for all I care I can setup the join in the db or
not at all. I just wanted to setup the fk syntax for development
purposes only. Foreign keys always slow down insert, update and
deletes and for performance reasons I don't put them in. So since this
is just a development
hi david,
the class is used to get the classdescriptor describing the table, the
columns etc. from repository.
field names are translated into column names using this descriptor.
hth
jakob
David Mitchell wrote:
I have a question regarding report queries.
What is the purpose of having to prov
I have a question regarding report queries.
What is the purpose of having to provide a OJB persistent class reference
when supplying the query code that will be
executed? I can see why you need to provide the following String array with
the names of the fields you want, but why do I
need to p
I am new to OJB but have some input. I could be smoking something, so be warned...
If Product can only be associated with one Group, shouldn't one assume you would be
referring to the Group using it's unique identity (primary key)? How else can you
guarantee effeciency and uniqueness?
In the Co
Im having the same issue exactly, and was trying to figure out how to put
the question!
I have two tables, Product and Group. A product can only be in one group,
but a group has many products. Here are representative schemas:
table Product
ndx int primary key,
name varchar,
hi,
report query is the way to go:
ReportQueryByCriteria query;
Criteria crit;
System.out.println("\nreport (sum(test) with name like '%er'");
crit = new Criteria();
crit.addLike("name", "%er");
query = new ReportQueryByCriteria(Person.class, crit);
Still a bit confused, If I have this:
...
and I want to setup a foreign key from assignedToID to another table
called Users and the column there is called userID
I added this as the foreign-key reference:
But it doesn't make any sense, if I put assignedToID in the field-ref,
how does
I found another bug in the treatment of arrays
in combination with indirection tables.
Please see OJB132 for a junit test to reproduce.
Olli
--
Dr. Oliver Matz
ppi Media GmbH
Deliusstraße 10
D-24114 Kiel
phone +49 (0) 43 1-53 53-422
fax +49 (0) 43 1-53 53-2 22
email mail
I have the following model:
a P contains a collection of Rs
a P also contains an explicit reference to one of the Rs it contains
an R contains a single PS
a PS contains a single OS, a single AS and several collections of other
things that are all empty for this problem.
I construct a P, with sing
On 13 Feb 2003 at 12:21, Mahler Thomas wrote:
> getCount does exist for OJB internal purposes.
I hope this does not mean it will be deleted from the interface at
some point ...
> If you want to work with resulsets instead with full entity objects use the
> reportquery mechanism.
I would very muc
Hi STefan,
http://jakarta.apache.org/ojb/apidocs/org/apache/ojb/broker/PersistenceBroke
r.html#store(java.lang.Object,%20org.apache.ojb.broker.util.ObjectModificati
on)
allows to specify wether to use isert or update, by a ObjectModification
(http://jakarta.apache.org/ojb/apidocs/org/apache/ojb/b
Hi,
I very much like the interface store of the broker which shields me
from the differences between insert or update. Sometimes however I
would like to prevent an update when an insert is not possible. E.g a
legacy application does not allow some records to be updated but only
to be inserted.
Wh
I put this conde in resin.conf inside a tag.
.
I don't know if is used only for the host definition or if it is
global for all hosts defined.
Ricardo.
-Mensaje original-
De: Klaasjan Brand [mailto:[EMAIL PROTECTED]]
Enviado el: jueves, 13 de febrero de 2003 1
On Thu, 2003-02-13 at 14:27, Leandro Rodrigo Saad Cruz wrote:
> I use resin to develop with ojb, but I put my parsers on WEB-INF/lib
That's needed when using Xerces too, but how do you set up OJB so it's
using Xerces to parse it's repository. The only way I know with Resin is
to use a server globa
Seems you don't fully update. Do you replace the repository_internal.xml
file?
regards,
Armin
- Original Message -
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, February 13, 2003 1:50 PM
Subject: Could not found autoincement attribute for class:
org.apache.ojb.odmg.col
I use resin to develop with ojb, but I put my parsers on WEB-INF/lib
On Thu, 2003-02-13 at 06:15, Klaasjan Brand wrote:
> Hi,
>
> We're using OJB 0.9.9 for a web application which has to be deployed on
> Resin. The app works fine on Tomcat, but when deployed on Resin I get
> the following error:
On Thursday, Feb 13, 2003, at 00:23 US/Eastern, Matthew Baird wrote:
your class com.lawton.business.BrokersToHomes must have a getter and
setter for "homeID" that sets/gets a HomeBO object.
aha, there is the major missing piece. Makes sense. So I would need
BOTH the bHomeID that is in the B
Hi,
I get the following warnig:
Could not found autoincement attribute for class:
org.apache.ojb.odmg.collections.DListImpl
then java.lang.NullPointerExceptionr is thrown in Class
DListImpl.generateNewId()
have some body an Idee where the problem is?
With the old 0.9.7 Version every thing works f
I've got everything working great now too. Thanks again.
--
Jason
- Original Message -
From: "Shannon Ewing" <[EMAIL PROTECTED]>
To: "'OJB Users List'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, February 11, 2003 5:12 PM
Subject: RE: [patch] Re: PBKey and OJB 0.9.9
> Works
Hi,
> Hi Jens,
>
> OJB defines a layer between my java app and a database. Since the
> repositiory file contains a description of the tables and column
> names I would think it to be bad design on my part if I repeated that
> information some-where hard-coded in my programm by doing a direct
>
Hi,
http://db.apache.org/ojb/tutorial3.html#using%20proxy%20classes
discusses the use of proxies in detail.
Essentially, if you want to use proxies for a SingleReference they
ultimately will
have to be interfaces so that OJB can generate a DynamicProxy for them.
Our Object model couldn't support
Hi,
I have solved my earlier problem with simple foreign key relationships
and they now work.
But how do I avoid loading the parent object before it is required?
I know I can use a single proxy for a whole collection BUT what is the
equivilent for single foreign key relationships like this
In a previous post I mentionned a couple of problems found
when I tried to switch to MySQL. The workaround was to
restart from a fresh new distrib. It seems that it not
possible to change the database once hsqldb has been set up.
1) A kind of target 'cleandb' should be present in the
build.xm
Hi Matthias,
this was a known bug in 0.9.9, was fixed:
- Original Message -
From: "Armin Waibel" <[EMAIL PROTECTED]>
To: "OJB Users List" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, February 11, 2003 10:57 AM
Subject: [patch] Re: PBKey and OJB 0.9.9
> Hi Jason, Shannon,
>
>
Hi,
We're using OJB 0.9.9 for a web application which has to be deployed on
Resin. The app works fine on Tomcat, but when deployed on Resin I get
the following error:
[BOOT] ERROR: Error in instantiation of PersistenceBrokerFactory class
Could not read repository class descriptor data, using repo
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