I dont have any tutorials at hand but your understanding of where the DB code lies is correct. It's totally on the server side and has nothing to do with GWT. Your GWT app would get access to the data via RPC. The RPC methods would in turn get data from the DB.
Hibernate is an ORM (object relational mapper) which allows you to tie Classes to DB tables in a way that is largely transparent to your application. One problem though in using hibernate with GWT is that the classes created via hibernate cant be serialized to the client via RPC (not that i know of anyway) so a lot of people use different libraries to make clones of the faux-POJO's so that they can be serialized. (I do this in the project that i'm working on but i did it by hand) (um, POJO means plain old java object). If you're interested in using hibernate you should probably use it from the start because retrofitting the application after the fact would on undoubtedly be extremely painful. But with that said and with as much as i love hibernate if you're using all of these new technologies together for the first time you may become overwhelmed and hibernate is a fairly involved framework so you might be better off getting a good grip on GWT and GWT's RPC mechanism first. but as always, ymmv On Sep 23, 10:53 am, PJ Gray <pj4...@gmail.com> wrote: > I am writing a fairly large web app using GWT in Eclipse. My background > is as a c++ desktop developer, so while I have used java before, sometimes I > stumble on easy stuff. > > Anyway, I am currently attempting to implement a database to store data from > my webapp. I am far from an expert in SQL, but I have done some desktop > programming of SQL before, so I feel comfortable enough doing SELECTs and > whatnot. (Most recently I did some development using the iPhone Sqlite > stuff). > > Can someone point me to a good tutorial or something that gives an example > of storing simple user data in a database from a GWT app? I found a servlet > based java/mysql example, so I am concentrating on classes like datasource > right now. I can only assume the SQL stuff needs to be contained on the > server side of a GWT app anyway, so I was going to start there. But I had > questions like: > > - what is the process for connecting to a database in hosted mode? Is > just left to me to get something like MySql installed locally, and then > follow instructions like listed here > (http://humblecode.blogspot.com/2009/05/gwt-16-using-jndi-datasource.html) in > order to connect? > > - when I do deploy to a live webserver, is it just a matter of switching the > database config (username/password, database name etc)? (as long as I have > everything setup in mysql on my live webserver obviously) > > - how does 'Hibernate' fit into all this? I read about it, and see it > mentioned everywhere. It looks like a library for persisting my java > objects in the database, rather than pulling information out of my objects > and storing the data only? Is that accurate? If so, I could write my > persistance layer in such a way that I could start by storing the data raw > (Strings, longs whatever), then later as my app becomes more complex, I > could implement Hibernate to start storing my model objects directly? > > Thanks in advance! > > -pj --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
