Is it possible for an object to have a reflexive collection? ie a collection of
itselfs?
Eg, Class person has:
/**
* @ojb.collection element-class-ref=Person
* indirection-table=friends
* foreignkey=personId remote-foreignkey=friendId
* proxy=true
List
Subject: Re: PB linking problem
On 11/4/05, Daniel Perry [EMAIL PROTECTED] wrote:
Not sure if this is really an bug, or just a 'feature', but
things dont get
linked under certain curcumstances.
I have two objects: activity, and attachment.
An activity has a collection
Daniel Perry wrote:
Not sure if this is really an bug, or just a 'feature', but
things dont get
linked under certain curcumstances.
I have two objects: activity, and attachment.
An activity has a collection of attachments.
/**
* @ojb.collection element-class-ref
Not sure if this is really an bug, or just a 'feature', but things dont get
linked under certain curcumstances.
I have two objects: activity, and attachment.
An activity has a collection of attachments.
/**
* @ojb.collection element-class-ref=com.netcase.pol.bo.Attachment
-
From: Thomas Franke [mailto:[EMAIL PROTECTED]
Sent: 06 September 2005 17:19
To: OJB Users List
Subject: [junk] Re: Boolean2IntFieldConversion with TINYINT
Daniel Perry wrote:
Boolean2IntFieldConversion mapped as a TINYINT - it MUST be INTEGER!!!
I don't know what you exactly mean but we
.
-Original Message-
From: Thomas Dudziak [mailto:[EMAIL PROTECTED]
Sent: 07 September 2005 09:18
To: OJB Users List
Subject: Re: [junk] Re: Boolean2IntFieldConversion with TINYINT
On 9/7/05, Daniel Perry [EMAIL PROTECTED] wrote:
What i mean, is that you cant do:
field
Subject: Re: Boolean2IntFieldConversion with TINYINT
On 9/7/05, Daniel Perry [EMAIL PROTECTED] wrote:
The following works fine:
/**
* @ojb.field jdbc-type=INTEGER
*
conversion=org.apache.ojb.broker.accesslayer.conversions.Boolean2
IntFieldCo
nversion
*/
protected boolean
file) to
people using it properly!
Daniel.
-Original Message-
From: Thomas Dudziak [mailto:[EMAIL PROTECTED]
Sent: 07 September 2005 15:36
To: OJB Users List
Subject: Re: Boolean2IntFieldConversion with TINYINT
On 9/7/05, Daniel Perry [EMAIL PROTECTED] wrote:
Hmm... What about
A warning to anyone else who might try this:
Just been struggling with IllegalArgumentExceptions on boolean fields.
Anyway, it turns out that you cant have a boolean with
Boolean2IntFieldConversion mapped as a TINYINT - it MUST be INTEGER!!!
Daniel.
Hi,
I'm trying to use the OJB xdoclet module (from 1.0.3 download) with java 5
generics.
The following:
ArrayList Integergeneric = new ArrayListInteger();
gives an error:
[ojbdoclet] Error parsing File C:\java\pol\src\java\Test.java:Encountered
at
line 11, column 27.
[ojbdoclet] Was
that library
to one of the snapshots that has the generics parsing support. I can
email the file I am using, if you want.
To answer your second question, ues you can use generics just fine in
OJB (due to erasure). Using it here without issue.
-Andrew
-Original Message-
From: Daniel
OJB warns you every time you write to the database without doing so in a
transaction.
If you dont have any need for a transaction, then thats acceptable... but it
will WARN you!
It's considered best practice to perform writes in a transaction, especially
when there are multiple associated
Taken from: http://db.apache.org/ojb/docu/guides/query.html#Report+Queries
Report Queries
Report queries are used to retrieve row data, not 'real' business objects. A
row is an array of Object. With these queries you can define what attributes
of an object you want to have in the row. The
No problem...
Instead of doing:
broker = PersistenceBrokerFactory.defaultPersistenceBroker();
Use
broker = PersistenceBrokerFactory.createPersistenceBroker(new
PBKey(jcdAlias));
Where jcdAlias is the alias you gave the connection in
repository_database.xml.
I'm pretty sure you can do it using
when resolving the path meeting.pdp.createdBy ojb looks for a
collection- or
reference-descriptor called 'meeting' and it uses the referenced
class to reolve
further path-segements 'pdp'. so if the class referenced by
'meeting' does
not have a reference-descriptor named 'pdp' ojb is not
.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 08 December 2004 10:32
To: OJB Users List
Subject: RE: p6spy
Well, i added:
com.mysql.jdbc.Driver a = new com.mysql.jdbc.Driver();
com.p6spy.engine.spy.P6SpyDriver b = new
com.p6spy.engine.spy.P6SpyDriver();
Just
, and it seems to be working. In the faq i found it
doesnt mention that you need to copy this file into the classpath!
Daniel.
-Original Message-
From: Armin Waibel [mailto:[EMAIL PROTECTED]
Sent: 07 December 2004 19:28
To: OJB Users List
Subject: Re: p6spy
Daniel Perry wrote
It apprears that ojb doesnt like criteria at depths that go beyond an
extent.
My criteria is:
crit.addEqualTo(behaviourId, new Integer(id));
crit.addLessThan(rating, new Integer(1));
crit.addEqualTo(meeting.pdp.createdBy, new Integer(mid));
And this generates the following sql (shortened!):
Have you got a default connection-descriptor set up in
repository_database.xml properly?
Are OJB.properties/repository***.xml (x4) all in classpath?
Daniel.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Sent: 08 December 2004 10:50
To: [EMAIL PROTECTED]
[java] org.xml.sax.SAXParseException: Relative URI jdo.dtd; kann
nicht ohne eine Basis-URI aufgel÷st werden.
My german aint great, but i think it means it cant find jdo.dtd Do you have
this file locally as i think you need it!
Daniel.
-Original Message-
From: [EMAIL PROTECTED]
I've got a bit of an odd criteria i need to specify, but i cant seem to get
it to work.
A has a reference to B, B has a reference to C. C had a reference to D. D
has a collection of Cs and a reference to the currentC.
I need to obtain all As where their C (via B) is current. Ie. such that
extents
which do.
When i get back in an hour or so, i will try to get pspy6 to work, and
figure this out!
Daniel.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 07 December 2004 15:35
To: OJB Users List
Subject: Circular criteria
I've got a bit of an odd
Simple question - how do i use p6spy?
I've recompiiled ojb with p6spy, and set mysql as the 'real' driver. I've
copied the jar file and p6spy's jar.
I've changed my repository to use p6spy (see below), and added the driver:
jdbc-connection-descriptor
jcd-alias=default
I'm dont think you can map one type to many tables. You can map extents
where you have more than one subclass, each mapped to a different table, and
then access the extent type - but i dont think it will like mapping multiple
tables to the exact same type.
I am, however, fairly sure that you can
Do you have repoistory_internal.xml as well? Or did you just miss this out
from the list below?
Daniel.
-Original Message-
From: Phillip Blevins [mailto:[EMAIL PROTECTED]
Sent: 02 December 2004 16:13
To: OJB Users List
Subject: Re: OJB can't open database
Tom,
for my web app
;
to:
return EMPTYCOLLEC;
This is causing it to change an empty vector into null on reloading the
class.
Thanks,
Daniel.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 26 October 2004 15:55
To: OJB Users List
Subject: Bug in IntList2VarcharFieldConversion
I've
I too have noticed these warnings. I have a couple of apps where i have
used no transactions (as they seem pretty pointless for the apps in
question - all 'shared' data is read-only), and they are generating a LOT of
these messages as there is a lot of data access. This adds too much noise
to
to everyone!
What are other peoples thoughts?
Daniel.
regards,
Armin
Daniel Perry wrote:
I too have noticed these warnings. I have a couple of apps where i have
used no transactions (as they seem pretty pointless for the apps in
question - all 'shared' data is read-only
the quickstart application (ojb-blank, with e.g. tutorial1 within)
This should be runable withount _any_ domain-knowledge (except:
Operating System Basics).
If a team did not achieve that, then I name it: failure.
What??? OJB is most definately NOT designed for people without any domain
I second this, i have OJB deployed with 6 apps running in my tomcat dev
server. I never use shared libraries as it causes too much hassle - each
app has it's own OJB jar - and some are different versions.
If you've not got any shared jars, can you post a stack trace and a bit more
info about
I believe this is because you have auto-retrieve=false in the reference
descriptors. If you set these to true, the objects will be loaded.
Daniel.
-Original Message-
From: Alessandro Colantoni [mailto:[EMAIL PROTECTED]
Sent: 24 November 2004 14:05
To: 'OJB Users List'
Subject:
complicate thinks too.
So I have to thanks all are involved in this work that is great
Hasta luego
-Mensaje original-
De: Daniel Perry [mailto:[EMAIL PROTECTED]
Enviado el: miércoles, 24 de noviembre de 2004 15:09
Para: OJB Users List
Asunto: RE: addPrefetchedRelationship problems
I
Edson Carlos Ericksson Richter wrote:
Check Java Tools documentation in Java docs (downloaded separately).
[I'm not interested in the documentation, but in the design-rationales.
This is more out of curisity.]
I've often wondered if sun just got lazy :)
I think it's just that its another
A team member suggested me to wait for your results.
Thus, I expected of course a notification on this forum.
But the developer list contains a notification.
I am a user - and as such I monitor only the user forum.
Your trying to contribute to the enhancement of OJB??? that makes you a
: [QUICKSTART] - A OJB quickstart similar to hibernate
Daniel Perry wrote:
[...] - (comments)
Sorry, i cannot discuss essential project mechanics again.
-
[general remark]
My main questions here is:
Can the team provide me with the targets run and deploy in a way
that i don't have
Hi All
I use OJB for my Webapp Application ( Webapp1 + Tomcat + OJB+ Oracle) ,
is very grood performance BUT
I haver other Webapp 2 do not use the OJB but use same Tomcat and Oracle
(Webapp2 + Tomcat + Oracle )
Thats ok, but be very careful with sequence managers - i know most of them
are
I think these comments would be fair for a commercial product, but you have
to remember that this is the open-source world, and people arnt paid to
answer questions in forums, it's entirely voulantary. When i'm not too busy
i often respond to messages on various lists (when i know the answer).
Thats ok, but be very careful with sequence managers - i know
most of them
are NOT happy with other apps doing inserts! see:
http://db.apache.org/ojb/docu/guides/sequencemanager.html
yes I have not Other solution I can not convert Webapp 2 to use same Ojb
cache or OJB.
Thats fine. So
(con)) )
I will check in your patch ASAP. Additionally I think we should release
the closed connection instance and I will do a minor refactoring of
CollectionProxyDefaultImpl to handle the used PB instance more strict.
regards,
Armin
Daniel Perry wrote:
I believe that I have solved
(con)) )
Daniel.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 02 November 2004 11:14
To: OJB Users List
Subject: RE: SQLExcpetion
Once again our app has started getting these errors (see trace below). It
seems to be happening after several days
Once again our app has started getting these errors (see trace below). It
seems to be happening after several days of operation.
The problem always seems to happen when iterating over a proxied collection
in a jsp (using jakarta JSTL c:forEach tag).
See comments below:
Is the error always
-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 11 October 2004 16:20
To: OJB Users List
Subject: RE: SQLExcpetion
Ah i forgot to mention - mysql and tomcat are on the same machine :) which
kinda counts out network problems.
I cant see any reason why i'd get these errors (at least
If i'm understanding you, you want an Account to have a List/Collection of
Accounts?
That shouldnt be a problem. Just add a collection descriptor in the normal
fashion and it will give you that collection:
collection-descriptor name=children element-class-ref=Account
proxy=true
I've just come accross a bug in class:
org.apache.ojb.broker.accesslayer.conversions.IntList2VarcharFieldConversion
.
On line 56 it currently has:
return NULLVALUE;
It should be:
return EMPTYCOLLEC;
The bug causes it to store a null value when it should store an
key to point from referrer_id to
referral_id let me know.
Thanks again.
Charlie
Daniel Perry said the following on 10/26/2004 4:24 AM:
If i'm understanding you, you want an Account to have a
List/Collection of
Accounts?
That shouldnt be a problem. Just add a collection descriptor
Hi,
I've been trying to debug some problems in our software, and it seems that
the High Low Sequence Manager has gone a bit mad!
I am seeing some wierd stuff going on - the sequence manager has NO
settings, so should be acting in the default configuration. The OJB_HL_SEQ
is showing grabsizes of
is increased by the grab size, and the
sequence manager continues to issue primary keys until it exhausts the
sequence again.
Pulat
Daniel Perry wrote:
Hi,
I've been trying to debug some problems in our software, and it
seems that
the High Low Sequence Manager has gone a bit mad!
I
!).
Could it be anything to do with caching of the HighLowSequence object?
Daniel.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 18 October 2004 15:27
To: OJB Users List
Subject: RE: HighLowSequenceManager chaos
Ok, so it is working for some reason when i
.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 18 October 2004 15:43
To: OJB Users List
Subject: RE: HighLowSequenceManager chaos
Duh, cant use native - it's not extent-aware :(
So, highlow seems to be working when i start it.
But it seemed ok before (until
table=ExtentTwoTable
field-descriptor
name=id
column=ID
jdbc-type=INTEGER
primarykey=true
autoincrement=true
sequence-name=base-sequence
/
...
/class-descriptor
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: Monday, October 18
To: OJB Users List
Subject: Re: HighLowSequenceManager chaos
Hi Daniel,
Daniel Perry wrote:
My repository_internal.xml didnt have the ObjectCacheEmptyImpl
cache set up
for the hl_seq class, so it would have been using the
ObjectCacheDefaultImpl.
Could this have caused the problem
Daniel Perry escreveu:
Hi all,
One of our systems has been running fine (live) for the last few
weeks until
yesterday when for about half an hour it started randomly crashing. Since
then it has been fine! The (partial) exception trace is below.
From what i
can figure the problem is coming
It have it working fine (now), but i have encountered 'issues'.
The main problem i had was that although you use localhost in the jdbc
connection url, mysql doesnt think it is localhost.
So if you try to use a user that is restricted to localhost it doesnt work.
Instead you have to use the
I have it working in tomcat 5 and 4.
Is this under linux or windows?
Have you checked file permissions? (especially if XP and tomcat service ?)
Have you tried running tomcat in user mode rather than service?
Daniel.
-Original Message-
From: WHIRLYCOTT [mailto:[EMAIL PROTECTED]
There are endless ways of handling this web transaction problem. I dont know of any
patterns that fit all problems.
OJB could handle the transation for you:
You start a tranaction.
Load some data. (and lock it)
Store transaction in session.
User edit's the data and submits it.
You commit
this mean for the performance of OJB? will OJB now query all
110 tables to find the right object?
Since I know quite easily based on the first 3 letters of the OID what
type it is, can I somehow tell that OJB as a hint to search the
right table?
Sebastian
Daniel Perry wrote:
What about
What about using an extent and having both types extend it. It would pick
the right class based on whichever table has an item with that primary key.
Daniel.
-Original Message-
From: news [mailto:[EMAIL PROTECTED] Behalf Of Sebastian
Sent: 02 June 2004 17:07
To: [EMAIL PROTECTED]
I'm using latest stable mysql 4 with ojb and havn't had any trouble at all
with mysql.
No idea about your other problem!
Daniel.
-Original Message-
From: news [mailto:[EMAIL PROTECTED] Behalf Of Paolo Salvan
Sent: 01 June 2004 12:05
To: [EMAIL PROTECTED]
Subject: OJB and MySQL?
using 'relational concepts' instead of 'OO
concepts'. This is one of the problems of the 'impedance mismatch' and I
think the OO way to solve it is using OO design the way I suggested.
Regards,
Enrique Medina.
From: Daniel Perry [EMAIL PROTECTED]
Reply-To: OJB Users List [EMAIL PROTECTED
The collection descriptor needs to be in the 1 side, not the n side...
eg.
say you had project - task mapping (1 - n respectively)
If in the task table you have fk_project_id, and project has id, and in your
classes Project.java has id and tasks field, and Task.java has projectId,
and in the
Users List
Subject: Re: Interfaces and collection-proxies
hi daniel,
when you use a collection-proxy tho whole collection is proxied
so there's no
need to define an interface for the contained classes.
hth
jakob
Daniel Perry wrote:
I know that I need to use interfaces for classes
I ended up spending time trying to understand proxies... confusing stuff
when you start out with ojb... these days it's making a little more sense :)
a. yes, it has to be of type StateProxy (the interface) as ojb will try to
instanciate it with a proxy object that implements the interface. If
I know that I need to use interfaces for classes if they are proxied
individually, but if I am only proxying collections, do the items I am
proxying need to implement any interfaces?
Thinking about it with hindsight, I would assume not, and I can get rid of
dozens of needless interfaces! Can
sorry... not sure why i replied then... monday morning...
Upgraded to RC6, and everything seemed to be fine. until now :)
One bit of code (that grabs a list - proxied collection) causes some nasty
sql errors. Upon calling the .size() method it generates some sql (I'll
hazard a guess of a
addOrderByAscending(b.name);
Make sure you use capitalisation as per your repository.xml - normally why
things dont work for me on first try!
Daniel.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: 10 May 2004 10:23
To: [EMAIL PROTECTED]
Subject: Setting
It's ok...
found the fix in BrokerHelper.java in cvs.
Daniel.
-Original Message-
From: Daniel Perry [mailto:[EMAIL PROTECTED]
Sent: 10 May 2004 12:35
To: OJB Users List
Subject: collection proxy gives sql error
sorry... not sure why i replied then... monday morning...
Upgraded to RC6
Our large project is now reaching maturity, and is being trialed with some
users finally! Despite quite large object trees, it is performing well (our
strategy is proxying collections only). But we are having a few problems
with collection proxies.
Every now and then (it really is random!)
Our large project is now reaching maturity, and is being trialed with some
users finally! Despite quite large object trees, it is performing well (our
strategy is proxying collections only). But we are having a few problems
with collection proxies.
Every now and then (it really is random!)
been put to cache, so another thread
could find partial materialized objects, is fixed in rc6 and CVS head.
It's only speculation (maybe it's only a simple prefetching problem).
Do the same problem occur when a per broker cache was used
(ObjectCachePerBrokerImpl)?
regards,
Armin
Daniel Perry wrote
doesn't quite cut it for me ..
I'd quite like to see an inverse-foreign-key in a relation descriptor.
Any chance this is upcoming ?
Cheers,
Stefan
Daniel Perry wrote:
I cant seem to figure out bi-directional references. Am I being thick? or
do
they not exist?
I have two objects in a database
I cant seem to figure out bi-directional references. Am I being thick? or do
they not exist?
I have two objects in a database, which need to be associated with each
other (optionally).
ClassB has a property ClassA me, and int meId.
meId is mapped as an int, and me is mapped as a reference
I looked at jasper reports, but it seemed difficult to do what i needed
(normal structured reports, and some very unstructured stuff)
Firstly i went down the iText route (java pdf library). Wouldnt do the same
again with hindsight - not enough control over positioning/margins
especially in tables
I take it that if you close the app, and load it again then the task
appears?
If so, i'd guess it's down to caching. I had this problem, although i'd
assumed that this was a 'feature'.
After each insert do:
PersistenceBroker broker =
PersistenceBrokerFactory.defaultPersistenceBroker();
From my experience of using both (i ended up doing an ODMG - OTM
conversion!):
Note that i dont any of the more complicated stuff - just storing object
trees, collections, etc, and querying the database. Also i dont use locking
atall (one thing odmg does better i believe).
Go with OTM.
ODMG
queries.
-Brian
On Apr 13, 2004, at 6:46 AM, Daniel Perry wrote:
From my experience of using both (i ended up doing an ODMG - OTM
conversion!):
Note that i dont any of the more complicated stuff - just storing
object
trees, collections, etc, and querying the database. Also i dont use
locking
I am using this in a complex app (due to idiot admin users deleting stuff
they shouldnt!). All objects have a boolean (mapped to int) deleted. For
all queries i look for objects with deleted=false. For relationships, i
wrote a querycustomizer which adds deleted=false to collections. (see below
OQL queries are different from sql.
You need to do something more like:
query.create(select ANYTHING from + YOURCLASS.class.getName() + where
id=null);
ANYTHING is ignored as far as I can tell so you really can put anything!
YOURCLASS is the name of the class you are querying (NOT THE
This has brought up an interesting question for me.
I am NOT using any anonymous keys, but i like the principle of them.
The majority of my work is web-based. Therefore, by not having PKIDs it's
much harder to pass references between requests.
Does anyone have any simple solutions to this
If you want to start with the Java source (and have control over it), then
the easiest way would be to use the XDoclet module, in which case it
bascially amounts to adding special javadoc tags to your source code, and
then invoking an ant task in your build file that creates the repository
to import some data from an existing MySQL database.
So it's pretty much switching which database OJB uses.
Thanks,
Daniel.
-Original Message-
From: Gus Heck [mailto:[EMAIL PROTECTED]
Sent: 27 January 2004 00:49
To: OJB Users List
Subject: Re: HSQLDB - MySQL 4 transition
Daniel Perry
After adding some lots of System.out.printlns to
ConnectionFactoryPooledImpl, it would appear that somewhere OJB is not
returning a connection to the pool. When releaseAllResources() is called,
it calls close() on the GenericObjectPool. When this happens,
GenericObjectPool has one active
I've now bodged the ConnectionFactoryPooledImpl so that it monitors all jdbc
connections created, and releaseAllResources() now kills any unclosed
connections.
Probably not going to affect anyone not using hsqldb embedded (or any other
database that can only be opened once at a time). One side
I want to query the database and retrieve a specific manager, and only their
employees whoose training (boolean) matches the requirement. Instead of
getting one manager with the x (out of y) employees, i get x managers.
My code is: (getObjectsByType) is just a query by criteria shortcut.
I'm having a problem trying to release database connections.
Here's what i understand of how it works
I assume the PB opens data connections when it's first used. A
connectionfactoryfactory is created, and connections are opened by the
connectionfactory.
Now, to shut down the database, i
Not sure if i'm being rather inept, but i cant find the j2ee.jar file on suns site.
Do i have to download the entire J2EE SDK? or can i get this file on it's own?
Thanks,
Daniel.
Are you talking about j2ee 1.3 or 1.4? because I've never been able to
find the 1.4 jar without the whole app server...
-Clay
You have to download the J2EE SDK!
Cheers, André
-Ursprüngliche Nachricht-
Von: Daniel Perry [mailto:[EMAIL PROTECTED]
Gesendet: Donnerstag, 8
if the connection pool is closed?
Thanks,
Daniel.
- Original Message -
From: Daniel Perry [EMAIL PROTECTED]
To: OJB Users List [EMAIL PROTECTED]
Sent: Thursday, January 08, 2004 5:20 PM
Subject: ConnectionFactoryPooledImpl - releaseAllResources
The releaseAllResources method
I was just reading the tutorial on the PB API, and came accross a slight error:
In the Deleting Persistent Objects,
PersistenceBrokerFactory.defaultPersistenceBroker();
Should be:
broker = PersistenceBrokerFactory.defaultPersistenceBroker();
One more thing, using ODMG i have been doing
back
in.
-Brian
On Jan 7, 2004, at 5:49 AM, Daniel Perry wrote:
I was just reading the tutorial on the PB API, and came accross a
slight error:
In the Deleting Persistent Objects,
PersistenceBrokerFactory.defaultPersistenceBroker();
Should be:
broker
I've got a problem where an object has a 1:1 relationship with the supertype of
another object. If i proxy the relationship, then i cannot cast the related object to
it's actual type. (it throws a ClassCastException).
The code below is part of Review. Review Implements the interface IReview.
();
query.create(queryStr);
query.bind(Integer.toString(itemId));
List objects = (List) query.execute();
return objects.get(0);
And enable proxying then it works fine. BUT at a SIGNIFICANT preformance
loss.
- Original Message -
From: Daniel Perry [EMAIL PROTECTED]
To: OJB Users List [EMAIL
I am still confused by this too.
Say i have a 1:n mapping between Manager and Employee.
I want to query using ODMG to say
select all Managers (and their Employees) where Manager.department=blah AND
Employee.status=fulltime
I did this using a query customizer for static queries (eg
: How to pass dynamic attribute values to
QueryCustomizerImplementations
Hello,
for a more detailed description pleas look at my other mail.
Daniel Perry wrote:
I am still confused by this too.
sorry!
Say i have a 1:n mapping between Manager and Employee.
I want to query using ODMG
I completely agree with it being bad design. However, I am using OJB in
struts applications. Lets take the example i gave before. The struts
action would simply load a collection of managers from OJB, and put them
into the request scope. The action would forward to a JSP. The JSP would
I think you are right. I think there are two ways of looking at this.
1. From an OO programing point of view, OJB could be seen solely as a
persistance mechanism for objects. Queries should be used for realising a
collection of objects or a single object. The single object (or each of the
How would you do this same query through the ODMG API?
Thanks,
Daniel.
- Original Message -
From: Gelhar, Wallace Joseph [EMAIL PROTECTED]
To: OJB Users List [EMAIL PROTECTED]
Sent: Tuesday, December 16, 2003 4:09 PM
Subject: RE: Simple (I Hope) Howto Question
Hi Gary,
This will
Most of the core configuration is in web.xml in your applications web-inf
directory (servlet configuration etc).
AFAIK, OJB doesnt require any configuration outside of your repository.xml
file.
The same applies to struts.
Daniel.
- Original Message -
From: Damon Torgerson [EMAIL
I looked at using jasper reports for a current web app project, and i very
nearly went down that route!
However instead, i chose iText java pdf generating library (which i think
jasper uses!)
My reason for this was that the reports i created were not simple record
based things. They were report
Can you post the related repository.xml and java code?
It's impossible to say without looking at the code.
Daniel.
- Original Message -
From: ghielard [EMAIL PROTECTED]
To: OJB User [EMAIL PROTECTED]
Sent: Thursday, December 04, 2003 2:23 PM
Subject: WHY OJB SPEND MORE AND MORE TIME TO
If you leave data in your database, and run the test again, does it start
quickly or slowly?
This should tell if the problem is to do with size of database, or to do
with the code.
any unproxied references in repository.xml?
are you closing transactions properly?
Daniel.
- Original Message
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