Re: [rules-dev] Drools Flow in EJBs

On 01/11/2010 19:05, tizo wrote: On Mon, Nov 1, 2010 at 4:21 PM, Mark Proctor <mproctor(a)codehaus.org&gt;wrote: > On 01/11/2010 15:31, tizo wrote: > > On Wed, Oct 27, 2010 at 5:21 PM, tizo <tizone(a)gmail.com&gt; 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. Shows configuring a JTA transaction here: http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/tr...