Dear User Group, I am using OpenJPA in combination with WebSphere 8 within a customer project. In the project we are using multiple Stateless EJB and typically we are calling multiple EJBs for a piece of business logic. Each EJB is performing some JPA actions (database read / update).
Now we want to make sure that a "piece of business logic" is running one transaction. For this we are using the @TransactionAttribute REQUIRED annotation. However taking a look at the EJBs (during the debugging) we see that each EJB seems to work with an own EntityManager (at least based on the object id). So we are not sure if the "business logic is really carried out at one piece". Thus following questions: 1.) Is there any way to trace / log the Transaction that is used by the EntityManager (at the end of the day) ? We activated the openjpa.jdbc,SQL Trace and see the following log statement: [29.07.14 10:17:34:692 CEST] 000000db jdbc_SQL 3 openjpa.jdbc.SQL: Trace: <t 1902712361, conn -1754159499> executing prepstmnt -341855657 Is "t 1902712361" the transaction used? (or is this just another identifier in the SQL context) 2.) Is there any trace providing further information? 3.) Is it the "expected behaviour" to have different EntityManager for each EJB (well they might be coordinated by the EJB container .... )? (EntityManager is created by injection, using @PersitenceContext Any feedback would be appreciated. Thanks in advance. Cheers Christoph Weiss
