Re: error in hibernate persistance service

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