On Wed, Oct 27, 2010 at 5:21 PM, tizo <tizone(a)gmail.com <mailto:tizone@gmail.com>> wrote: Hi there, I have seen in chapter 6 of the documentation, that Drools Flow can be configured to use JPA and transactions to persist the running states. However, I am in a EJB where I obtain entity managers with a @PersistenceContext annotation, and the transactions are managed by the container, whereas in the example an EntityManagerFactory and a TransactionManager are used. Could I configure Flow in a direct way to be used by my EJB? Thanks very much, tizo Ok, looking at the code, I guess that Drools flow is not ready to work with standards EJBs. The reasons are the following: * The JPA annotations are not standard JPA annotations, but hibernate ones. For example "CollectionOfElements" in ProcessInstanceInfo class.

* Transactions are managed by Drools, as opposed to some EJBs where transactions are managed by the container.

As for that, I will probably modify the codes, so Flow could be used in our EJBs. I would like to know if someone could guide me on what should I modify. I will post the modifications in case they are of interest to someone. Thanks very much, tizo || _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev

On Mon, Nov 1, 2010 at 4:21 PM, Mark Proctor <mproctor(a)codehaus.org <mailto:mproctor@codehaus.org>> wrote: On 01/11/2010 15:31, tizo wrote: > On Wed, Oct 27, 2010 at 5:21 PM, tizo <tizone(a)gmail.com > <mailto:tizone@gmail.com>> wrote: > > Hi there, > > I have seen in chapter 6 of the documentation, that Drools > Flow can be configured to use JPA and transactions to persist > the running states. However, I am in a EJB where I obtain > entity managers with a @PersistenceContext annotation, and > the transactions are managed by the container, whereas in the > example an EntityManagerFactory and a TransactionManager are > used. > > Could I configure Flow in a direct way to be used by my EJB? > > Thanks very much, > > tizo > > > Ok, looking at the code, I guess that Drools flow is not ready to > work with standards EJBs. The reasons are the following: > > * The JPA annotations are not standard JPA annotations, but > hibernate ones. For example "CollectionOfElements" in > ProcessInstanceInfo class. That was the one element we couldn't find a replacement for in JPA1, JPA2 fixes this, but we haven't updated to JPA2 yet. I don't believe we use any other hibernate specific annotations. > * Transactions are managed by Drools, as opposed to some EJBs > where transactions are managed by the container. You can use both JTA transactions and local entity transactions. So transactions can be drools maintained or container/external maintained. > > As for that, I will probably modify the codes, so Flow could be > used in our EJBs. I would like to know if someone could guide me > on what should I modify. > > I will post the modifications in case they are of interest to > someone. > > Thanks very much, > > tizo > Mark, Thanks for your response. Could you tell me how can I use Drools with my container managed transactions, or where can I read how to do that?. I think that the example given in the documentation (Drools Flow, 6.1.4 - Transactions) does not apply to this case, and I can't figure out how to do it.

Thanks again, tizo _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev