The terms "jta-datasource" and "resource-local datasource" are a little vague to me. I'm putting down what I am understanding ( or assuming ) and I'd like you to say where I'm right / wrong. The ...

I store file’s attributes (size, update time…) in database. So the problem is how to manage transaction for database and file. In a Java EE environment, JTA is just able to manage database transac...

Title says it all: What is the difference between a UserTransaction and an EntityTransaction? My rudimentary understanding is that UserTransaction is used when JTA is required (e.g. to do queries ...

Are there any reliable and well-known NoSQL DBs available that support JTA transactions? In my application I need to store some data to the RDBMS DB and some data to the NoSQL DB in the same ...

I have two level access to database: the first with Hibernate, the second with JDBC. The JDBC level work with nontransactional tables (I use MyISAM for speed). I want make both levels works within ...

They recommend using JTA transaction support in Java EE environment. But how to configure JTA in Tomcat6 so that Hibernate Session could use it ? Starting with version 3.0.1, Hibernate added th...

I'm attempting to use hibernate entity manager with mysql and glassfish. I'm getting the following error when attempting to use a JTA datasource: Caused by: org.hibernate.HibernateException: The ...

Q1. i do understand when we need to deal with multiple databases, we need to use global transaction. but from this post http://fogbugz.atomikos.com/default.asp . the person suggested just use sprin...

We configure our Spring transaction in Spring config as: <tx:jta-transaction-manager/> I gather this means that Spring will automatically discover the underlying JTA implementation. So whe...

I`m using hibernate with jpa, and it is configured with persistence.xml Is it possible to get hibernate connection properties from web application? Thanks.

What is the simplest (preferably without any new table creation) way of running a database query which takes long time (at least several minutes) in Oracle DB?

Our application needs to use (read-only) a couple different persistence units pointing to different databases (different, commercial vendors as well). We do not have the budget to enable 2pc on on...