Hello,

I am developing a system using Hibernate, JSF and Spring. I'd like to know what are the biggest issues that I should consider since I don't have so much experience with Hibernate. The system doesn't have requirements for a lot of users try to access the same resource concurrently, for example, but it's a legacy database.

Is there any situation where I need to use iBatis or is Hibernate 3.1+ enough?

Technical explanations inside the Hibernate is very very welcome.

Thanks in advance. Nato.
p.s. Just to let you know that I'm already working hard on it(Hibernate, JSF and Spring).

ehh, not many issues. Only thing I do is if I have really complex and long queries, is that I just do a sql call instead of trying to convert them to criteria or hql.

Chris,

Thanks for your reply. What about the issues related with legacy database?

Regards, Nato.

Hibernate can handle legacy databases. The only problem I ever find with those is the heavy use of natural keys; but hibernate doesn't have any problems using multiple keys to match relationships. Only tricky thing is if you use sets you have to define the hashCode to use some other fields than the keys as they can often be the same

Interesting about the set's trick. So, I have to define hashCode() - like you said - and equals() as well.

yeah. you can specify in the hbm.xml files using meta attributes which fields you want it to use if you use the hibernate tools code gen tools.

Fields that won't change while the object is being used by the program are good to use, or business keys