ok. gotcha.
Igor Vaynberg wrote:
If there is an error you need to rollback your transaction (cancel all
changes made to the db).
Rollback is a flag I use to see whether or not there was an error.
So for example to check for error in wicket you can do this
MyRequestCycle extends RequestCycle {
public void onRuntimeError(...) {
.....
hibernatelocator.getlocator().markrollback();
....
}
}
When the hibernate filter runs at the end of request it will know there was
an error and it needs to roll back the transaction.
-Igor
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jonathan Locke
Sent: Friday, July 29, 2005 12:50 PM
To: [email protected]
Subject: Re: [Wicket-user] Hibernate/EJB3.0
i have added some basic transaction semantics support to the
wicket-contrib-database.
for now, i've just got TRANSACT_OPERATIONS and TRANSACT_REQUEST.
you can set the value globally with
Database.setDefaultTransactionSemantics() or per-db-session
with DatabaseSession.setTransactionSemantics().
i haven't added anything about mark-rollback. what exactly
does that do?
Igor Vaynberg wrote:
I am using a single-transaction-per-request pattern - in my
case I want
to rollback the transaction even if there was a ui error -
that way the
user isnt confused as to why he got an error but the changes
got saved.
When I was using h3 I had a
Interface hibernatesessionlocator() {
session getsession();
void markrollback();
boolean hassession();
}
I have an implementation of it that upon the first request to
getsession() creates a session, begins a transaction, and sticks the
session into a request attribute.
The app can retrieve a session or mark it for rollback using
the locator.
Then I had a filter that would at the end of the request either
rollback or commit the transaction and close the session.
The only diff with ejb3 is that you don't need the locator to create
entitymanager/transaction as it is done for you.
-Igor
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Friday, July 29, 2005 10:29 AM
To: [email protected]
Subject: RE: [Wicket-user] Hibernate/EJB3.0
Getting my hands on a WAR to see how you integrated
hibernate would be
great. I'd be very appreciative.
Unfortunately, I am not starting from scratch and I am
trying to see
how well wicket grafts onto an existing project that has many DAO's
that return POJO beans. We are currently moving them into
EJB3 objects
and the whole process is still quite new to me.
I would be interested to see where/how you are building the
Hibernate
(EntityManager?) connection. From what Igor is saying it
sounds like
the connection is built up in the Wicket application and
the objects
are loaded on the attatch events.
Perhaps we can flesh out this aspect of wicket in the wiki
a bit more.
-Paul
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Phil
Kulak
Sent: Friday, July 29, 2005 12:30 PM
To: [email protected]
Subject: Re: [Wicket-user] Hibernate/EJB3.0
I'll be committing a new version of CDApp shortly using rewritten
databinding and Hibernate3 integration. If you're not into
the whole
CVS thing, I can post a WAR somewhere so that you can get a
feel for
it.
On 7/29/05, Igor Vaynberg <[EMAIL PROTECTED]> wrote:
Paul,
Im not aware of any official docs yet. I am currently using
wicket as
a
presentation tier for ejb3 project, and its pretty easy to
integrate.
IMHO there are two main areas that need integration: application
object, and
detachable models for entities.
In the constructor's application object i get all needed
service bean
references or locators and set them as member variables. So now
anywhere in
your wicket components you can do
((MyApplicationClass)getApplication()).getService().doSomething();
and your getService() can be implemented either as getService() {
return
service; } or getService() { return
serviceLocator.locate(); } you can
implement helper funcs in your page subclass to eliminate casting.
As far as detachable models go in the onAttach() you can do pretty
much the
same thing:
public void onAttach() {
obj=((MyApplicationClass)RequestCycle.get().getApplication()).
getService
().load(....);
}
Igor
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Friday, July 29, 2005 8:52 AM
To: [email protected]
Subject: [Wicket-user] Hibernate/EJB3.0
Greetings,
I'm evaluating several web frameworks including Wicket for
an internal
project and I was wondering if there was some documentation on
Hibernate or
EJB3.0 somewhere that I am missing. I found the
wicket-contrib package
at
http://wicket-stuff.sourceforge.net/ as well as the
HibernateObjectModel object in there. I also saw a quick
run down on
Phil's
weblog: http://jroller.com/page/pKulak/ that seems like a
good start
but I'm
failing to see how it all fits together. Is there an example
application
(PetStore-ish?) that uses EJB3 or Hibernate available to look at?
Overall I really like the direction of this project. Keep
up the good
work.
-Paul
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