I am wanting to buy a book on Hibernate and am looking at Hibernate In Action and Professional Hibernate. I was wanting to get some votes for 1 or the other and a brief why would be nice as well.

Thanks.

Oh, that "Professional Hibernate" is new to me, I have to read it. Looks like it will be out in October so I doubt anyone can tell you what's in it.

Stay away from the O'Reilly book, it's not good and has many errors.

Hibernate in Action is certainly the reference, since it was written by Gavin King and me, two Hibernate team members. I've seen so many mistakes and errors, even by very smart people, that I wouldn't trust anyone else writing about Hibernate or ORM. Maybe this will get better in the future, but I still think the average Java developer has much to learn about database applications.

I did a training two weeks ago and all 12 people said "No" when I asked "are database transactions mandatory?". We have a long way...

Seems like a pretty reasonable answer to me if you primarily work with MySQL <smile>

Scott

I've just seen that the author of "Professional Hibernate" claims to be a committer on the Hibernate project. While I appreciate his effort and I always welcome more documentation about Hibernate, I have to clarify this issue.

Eric maintained (sometimes) the Avalon plugin for Hibernate, which had a place in the HibernateExtensions package.

As far as I currently see, we will remove those three classes soon, as they complicate the build process (they haven't even been released) and no-one is interested in the functionality (we don't maintain this for 5 people). We'd welcome Eric if he has other things to contribute, but so far we didn't receive anything else.

One of the press texts for Eric's book read: "The lead author is Eric Pugh, a key member of the Hibernate team; the book covers the new 2.2 Hibernate release"

It seems it is a bit outdated (there is no Hibernate 2.2 on the road map anymore), I wouldn't say that Eric is a key member of our team. He has commit access that will be revoked at some point (e.g. during a normal cleanup process), if there are no contributions.

There are currently 7 active committers on the Hibernate team and they work very hard every day to keep this project alive. I think they deserve this clarifying statement.

I'll also send this as an email to Eric.

Peace

I order Hibernate in Action (pdf) and it is great book.

"are database transactions mandatory?" - answer is "no" - oracle don't open transaction for select - read consistency work with oracle SCN (oracle version
system)

regards

*sigh* It's still a transaction scope.

every transaction update SCN number (for +1) - select don't update SCN
I haven't to call 'begin' and 'edn transaction' in client for select

Why is it transaction ?

Postgresql gays tell that select is transaction - it is true for system without version control, but with version control select is only select - it don't update system.Postgresql have version control and do transaction for select ; I don't know why - it is from old postgres (without version control)

regards

Wrong. Don't call people gay who understand MVCC better than you.

I'm sorry - it is type mistake (I think guys - I type 'edn transaction' in place of 'end transaction'). I don't wan to irritate nobody, but You don't answer me

regards

I'm sure you can show us an example of your claim. I have Oracle installed, so I can do whatever you like me to do with it.

Sure.
You have to only user on system - if You have another user then he can do transaction.

Try script from sqlplus :

set autocommit off

drop table t
/

create table t(n number)
/

select start_scnb,start_scnw -- 1
from v$transaction
/

insert into t values(1)
/

select start_scnb,start_scnw -- 2
from v$transaction
/

commit;
select start_scnb,start_scnw -- 3
from v$transaction
/


1 -- select return no rows - DDL (create table) do commit auto and we aren't in transaction
2 -- return one row - we are in transaction
3 -- return no rows, again

regards

I appreciate the responses regarding the book. If you guys would like to get into a transaction argument, please do so in a new thread. :)

I've just seen that the author of "Professional Hibernate" claims to be a committer on the Hibernate project. While I appreciate his effort and I always welcome more documentation about Hibernate, I have to clarify this issue. ...

That interesting. At least now I know which book not to get. Does HIA contain code that is compliant to the current release of Hibernate (2.1.4)? Or was it in editing prior to the current release? How much has changed since the book was finalized?

The book was finished yesterday, with the release of the eBook. It's current for Hibernate 2.1.x.

Fair enough, you don't need explicit transaction demarcation if read committed is good enough for your selects.

I didn't realize there was a forum for discussion of HIA. So if someone wants to move this...