Lift

The lift-jta module is a thin convenience layer over transactional modifications for entities managed with an EntityManager. It is currently not a general jta solution. If you have suggestions for further enhancements to the modules please bring it up on the lift list.

The options available for the Context are listed in the scaladocs.

In short – If you are currently using jpa, hibernate, or any other framework which provides you with an EntityManager then this is a nice way to make transactional updates to entities.

Example usage 1:

 for {

   ctx <- TransactionContext.Required

   entity <- updatedEntities

   if !ctx.isRollbackOnly

 } {

   // transactional stuff

   ctx.getEntityManager.merge(entity)

 }

Example usage 2:

 val users = for {

   ctx <- TransactionContext.Required

   name <- userNames

 } yield {

   // transactional stuff

   val query = ctx.getEntityManager.createNamedQuery(“findUserByName”)

   query.setParameter(“userName”, name)

   query.getSingleResult

 }