Yes you are wrong.
Db40 is an oodbms - it's concept equivalent to hibernate+rdbms - its just a
persistence store.
Having code like this
Class Person {
private long id;
private String username;
private String firstname;
private String lastname;
...getters/setters...
public void save() {...}
public void loadById(long id) {...}
}
Can be done with anything from hibernate to db40 to jdbc - its still a poor
way to write an application.
-Igor
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Gili
> Sent: Friday, October 07, 2005 2:28 PM
> To: [email protected]
> Subject: Re: [Wicket-user] Standard for database integration?
> (Please!)
>
>
> Well ... I could be wrong ... but as far as I can tell,
> when you use db4o, the data and business logic all go
> directly into your POJO so there is no "middle layer". I
> assume "middle layer" was the business logic? I've never
> looked at Spring before so I can't comment on it at this time.
>
> Gili
>
> Igor Vaynberg wrote:
> > What does a standard db integration entail?!? What will it provide?
> > Why do we need to integrate the database layer with the ui layer -
> > arent we skipping the whole middle layer??
> >
> > You don't need wicket-contrib-data* packages to write a database
> > driven wicket app, infact, for me those packages present nothing
> > useful and nothing that makes it any easier to access the database.
> >
> > Here is a very simple architecture:
> >
> > Use spring (or any other container) to create your middle layer and
> > manage all the database stuff (closing/opening session, etc). Have
> > wicket pull out services objects out of the spring context and use
> > them to manipulate data in the database. Done.
> >
> > -Igor
> >
> >
> >
> >>-----Original Message-----
> >>From: [EMAIL PROTECTED]
> >>[mailto:[EMAIL PROTECTED] On Behalf Of Gili
> >>Sent: Friday, October 07, 2005 1:55 PM
> >>To: [email protected]
> >>Subject: Re: [Wicket-user] Standard for database integration?
> >>(Please!)
> >>
> >>
> >> I think the first step towards a standard DB
> integration is to give
> >>more use-cases using something other than Hibernate. To date, I've
> >>touched upon Hibernate, Cayenne and now I am looking at
> db4o. It would
> >>be nice to know how far one can go with the wicket-contrib
> modules if
> >>something other than Hibernate is used. I haven't gotten
> that far yet
> >>so I can't tell you at this point...
> >>
> >>Gili
> >>
> >>Gwyn Evans wrote:
> >>
> >>>I tend to agree with Nathan, in that there does seem to be
> a lot of
> >>>odd parts dotted around... Maybe they all hook together,
> >>
> >>but I suspect
> >>
> >>>that only if you know what you need can you pull the right bits
> >>>together...
> >>>
> >>>Personally, I'm not familiar with Hibernate, so don't
> >>
> >>really know what
> >>
> >>>I'm looking for, although I was able to pull together a
> >>>PageableListView app to display a table loaded via
> Hibernate a while
> >>>ago. I'm limited to JDK 1.4, so can't use annotations
> (and thus the
> >>>later cd-app as a template).
> >>>
> >>>I'm still not sure if I'm missing something here, as even
> >>
> >>that simple
> >>
> >>>app required wicket-contrib-data,
> wicket-contrib-data-hibernate-3.0
> >>>and wicket-contrib-dataview...
> >>>
> >>>What I'm personally missing is a generic (template) DB
> web-app, that
> >>>would run under JDK 1.4, that would provide CRUD
> functionality and a
> >>>pageable view...
> >>>
> >>>Any thoughts/comments?
> >>>
> >>>/Gwyn
> >>>
> >>>On 04/10/05, Igor Vaynberg <[EMAIL PROTECTED]> wrote:
> >>>
> >>>
> >>>>What kind of integration do you want with the dataview? The
> >>
> >>dataview is a
> >>
> >>>>generic package and all you need to integrate it is to provide a
> >>>>dataprovider:
> >>>>
> >>>>protected static class UsersDataProvider implements
> IDataProvider {
> >>>> private UserDAO getUserDao() {
> >>>> return
> >>
> >>MyApplication.getInstance().getUserDao();
> >>
> >>>> }
> >>>>
> >>>> public Iterator iterator(int first, int count) {
> >>>> return getUserDao().find(first, count);
> >>>> }
> >>>>
> >>>> public int size() {
> >>>> return getUserDao().count();
> >>>> }
> >>>>
> >>>> public IModel model(Object object) {
> >>>> return new
> >>
> >>DetachableUserModel((User)object);
> >>
> >>>> }
> >>>> };
> >>>>
> >>>>Getting a hold of a sessionfactory is also very easy
> >>
> >>especially when you are
> >>
> >>>>dealing with spring
> >>>>// create your application subclass inside spring Class
> >>>>MyApplication extends WebApplication {
> >>>> private SessionFactory sf;
> >>>>
> >>>> public void setSessionFactory(SessionFactory sf) {
> >>>> this.sf=sf;
> >>>> }
> >>>>
> >>>> public SessionFactory getSessionFactory() {
> >>>> return sf;
> >>>> }
> >>>>
> >>>> public static MyApplication getInstance() {
> >>>> return (MyApplication)Application.get();
> >>>> }
> >>>>}
> >>>>
> >>>>Then anywhere in your code:
> >>>>
> >>>>MyAPplication.getInstance().getSessionFactory();
> >>>>
> >>>>I personally think these things are pretty trivial and I
> >>
> >>don't see a need
> >>
> >>>>for a stand alone project. Maybe an example is all we need.
> >>>>
> >>>>-Igor
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>-----Original Message-----
> >>>>>From: [EMAIL PROTECTED]
> >>>>>[mailto:[EMAIL PROTECTED] On Behalf Of
> >>>>>Nathan Hamblen
> >>>>>Sent: Tuesday, October 04, 2005 9:49 AM
> >>>>>To: [email protected]
> >>>>>Subject: [Wicket-user] Standard for database
> integration? (Please!)
> >>>>>
> >>>>>One of this project's strengths is its community of
> contributers.
> >>>>>Unlike some other Java web component frameworks, Wicket is not
> >>>>>controlled by a founder & dictator.
> >>>>>Hooray for that. But in some areas, disorganization is
> killing us.
> >>>>>
> >>>>>At present, there is no standard way to access a
> hibernate session
> >>>>>factory. I understand that the lack of such a standard
> doesn't stop
> >>>>>me from accessing one somehow. Wicket's domain is the user
> >>>>>interface, and I could integrate with a database however I like.
> >>>>>That's not very helpful though, to me and every other web
> >>>>>application programmer who absolutely have to integrate with a
> >>>>>database before we do anything else.
> >>>>>Most of us are on hibernate, often accessed through Spring.
> >>>>>We just want one way to hook these things up.
> >>>>>
> >>>>>In late August there were two (or more) database
> packages that did
> >>>>>things rather differently from each other, then Jonathan Locke
> >>>>>announced contrib-database. Apparently he didn't think
> the existing
> >>>>>efforts were clean enough. That's fair, I'll take his
> word for it.
> >>>>>I was ready to switch to that package until I saw that
> it didn't go
> >>>>>beyond loading individual hibernate objects. Loading one
> object is
> >>>>>the easy part. The interesting part, the part that could
> be done a
> >>>>>hundred different ways, is how to load and display many objects
> >>>>>using a query. That's handled by the apparently unclean contrib
> >>>>>data and dataview packages. Great.
> >>>>>
> >>>>>I wonder if this is just a problem of communication. Surely
> >>>>>dataview, for example, could be adapted to contrib.database's
> >>>>>foundation. If those two could be merged, we'd have something
> >>>>>deprecation-proof to use right now. The code doesn't have to be
> >>>>>perfect, it just needs to give us an overall structure
> to program
> >>>>>around.
> >>>>>
> >>>>>Are people talking to each other? I'm just asking because,
> >>>>
> >>>>>from my perspective, there's a bizarre silence on the
> >>>>
> >>>>>subject. An argument would be better than nothing. We
> NEED database
> >>>>>integration. Not just for the "enterprise," but for any web
> >>>>>application worth using. Let's get it together.
> >>>>>
> >>>>>Nathan
> >>>
> >>>
> >>>
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> >>
> >>
> >
> >
> >
> >
> >
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