Re: error in hibernate persistance service

Again my fault... my only excuse why I didn't see this is that I had
some problems with my teeth... but don't worry, I saw my dentist today
and he did a good job... hope my concentration will come back ;-) ... at
least I have no excuses anymore! Sorry guys!

Explanation of the error: not really a big deal... the new hibernate
version requires two methods to be implemented... and those are
equals(Object) and hashCode() which the error code is quite clearly
indicating - and I forgot hashCode().

Will check in the changes in a few minutes...

Cheers,

Aleks

On Mon, 2004-07-05 at 17:32, Maurizio Brilli wrote:
> Aleks,
> I'm trying to sort things out, as I've realized I was building over 
> half-built configurations. So I decided that, in order to understand 
> which errors were caused by incoherent configurations, as I'm not 
> familiar with keel's build system, at every step, I'd clear it all and 
> build ex-novo the whole installation (with 'ant nonetinstall').
> So here's what I'm up to:
> - default configuration, default persistence, hsqldb RDBMS: ok
> - default configuration, default persistence, mysql RDBMS: ok
> - default configuration, default persistence, DB2/400 RDBMS: dialect not 
> implemented, so I'll have to get back to it later.
> - default configuration, hibernate persistence, hsqldb RDBMS: when 
> running model 'createdb', app-poll gives error Could not return a 
> reference to the Component 
> (Key='org.keel.services.persist.PersistentFactory/*'). This time the 
> reason is following:
> GRAVE: Could not compile the mapping document
> net.sf.hibernate.MappingException: composite-id class must override 
> hashCode():
> org.keel.apps.poll.entity.CatSec
>         at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:311)
>         at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1243)
>         at net.sf.hibernate.cfg.Configuration.add(Configuration.java:249)
>         at net.sf.hibernate.cfg.Configuration.addXML(Configuration.java:206)
>         at 
> org.keel.services.persist.hibernate.HibernatePersistentFactory.initialize(HibernatePersistentFactory.java:297)
> So I remarked "app.poll=true" from ant.properties, rebuilt the whole 
> thing (always with ant nonetinstall after having deleted all that was to 
> be deleted in order to do a clean start) and model 'createdb' gave me 
> this other error:
> Unable to create database tables:null, Persistence exception while 
> creating default data for 'ids.ids', adding 
> name:ids.ids,table_name:ids,field_values:table_name=KeelListItem
> (btw, as far as I can see,  the definition of the ID table IS in 
> system.xconf)
> 
> Now I'd like to be honest with you, but I'd like to have a reply also 
> from Michael and Shash, whom I know come from the Expresso project: I've 
> started following the keel project because of a series of problems I'm 
> having with Expresso. Mind you, I'm not a skilled Java programmer, still 
> it took me a few hours to get Expresso working on linux, windows, and 
> even the iseries. Because of the problems I was facing, I went on the 
> Internet to look for an alternative framework and last week I found 
> Keel. To be honest, beside the promises of a real open framework, what 
> attracted me was the presence of at least two former members of the 
> other project. I thought it meant they faced my same problems and found 
> a way to solve them. But it looks like the contrary: I'm facing many 
> more troubles in installing Keel than Expresso, and this is very 
> frustrating, if you consider I'm only scratching the surface of the 
> project. It might even be only the hibernate implementation that is 
> faulty (unless it's me who didn't catch the philosophy...), but what 
> happens if, after getting further in the implementation I wanted to 
> change the Authentication or Authorization service? Consider that, just 
> for a taste of it, I tried to start the default configuration with 
> cocoon instead of struts, and I didn't even reach the end of the build 
> process.
> Now, again, I can't consider myself anymore than a "power user", so I'd 
> like you guys to be as honest with me as I was with you and tell me if 
> you think it's a good idea for me to keep triyng to get keel working the 
> way I need it to.
> Thank you.
> Ciao
> Maurizio
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