spring has implemented itw own opensessioninview filter., i dont' think that you have to crete your own
Spring has a class like this which you can declare in your web.xml OpenSessionInViewFilter On Thu, May 7, 2009 at 2:29 AM, Christian Helmbold <christian.helmb...@yahoo.de> wrote: > > Hello, > > I want to use the Open Session In View Pattern with Wicket, but I don't want > to open a Hibernate Session for every request like the ServletFilter approach > does. > > I looked at the "lazy-loading Open Session in View" for JPA implementation > from Wille Faler. > http://faler.wordpress.com/2009/04/30/building-a-more-scalable-open-session-in-view/ > He uses AOP instead of a ServletFilter to intercept only those method calls > that need an EntityManager. > > My plan is to build something similar for Hibernate with Spring AOP. The > solutions would consist of the following steps: > > 1. An aspect creates a new Hibernate Session, if a method is called, that > needs one and none is already open. > 2. The transaction runs. > 3. The RequestCycle commits the transaction and closes the session. Or > rollback, if an exception was thrown. > > Is something wrong with it? > > The Hibernate Reference says: "When the transaction ends, either through > commit or roll back, the "current" Session is closed automatically." > https://www.hibernate.org/42.html#A6 > > This means that only one transaction can be executed in one request, right? > But what is, if I need more than one transaction per request? Since I have to > hold the session open during rendering, because of lazy loading, I cannot > commit a transaction if I don't know another Session will be opened > immediately and not to be closed until the end of the request cycle. > > Hibernate typically bounds the Session to the current thread. But was is the > current thread in a Wicket Application? Are those threads pooled? Could the > same session be used in two requests, when no commit happened? > > Thanks in advance, > Christian > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
