Will be of great help if anybody can provide some info on any sample examples to test Transaction and Session Management with Spring. I have evaluated Hibernate for my product and I found its really good:- ) Thanks Hibernate Team too for their support all the time. You are doing an excellent job.

I want to see if Spring can help me in Tx and Session Mgmt with Hibernate in my current system. Also, I can do the Tx handling with EJBs (CMT beans ) also, then why would I go in for Spring. Honestly, I have not gone much through the Spring documentation, but ya I read Transaction Mgmt Chapter of the SPring ref guide. and it briefly explains . Can anybody help me in this. I am not convinced yet how Spring can help me.


Thanks in advance

http://www.hibernate.org/110.html is a good starting point. Take a look at the examples in the spring distribution as well. There are also quite a few posts in the forum on this topic - do a search and you should find more information.

The main value proposition of Spring's Hibernate support is that is provides both transaction management *and* Session lifecycle management, while EJB CMT just provides the former. With EJB CMT, you need to care for the Session lifecycle yourself, typically with some custom ThreadLocal. Spring provides convenient, pre-built solutions here.

Furthermore, Spring provides sophisticated means to set up and wire your resources and application objects, in particular your SessionFactory, your DAOs, and your business facades. Handling a SessionFactory can cause some headaches with EJB, because you need to guarantee singleton semantics for it, rather than one SessionFactory per pooled EJB instance.

Essentially, Spring's transaction management is a lightweight *alternative* to EJB CMT, allowing you to code your DAOs and your business facades as POJOs rather than work with local SLSBs. Spring's services are available in any environment, be it in plain Tomcat or a standalone application - no EJB container required.

http://www.hibernate.org/110.html gives an introduction. Have a look at the Petclinic sample app that comes with the Spring distribution for a working example: It's "clinic" business object uses Spring's declarative transaction management with Hibernate as data access strategy. Note that Petclinic works nicely in plain Tomcat!

Juergen