[jboss-user] [JBoss Seam] - Re: persist() / remove() at end of long running conversation

[fjalvingh]

I seem to have the same problem. I'm running seam 2.0.0b1 with hibernate 3.2.3, hbem 3.3.1 in JPA mode without EJB (Tomcat native).

I have a method as follows:


  | @Transactional(TransactionPropagationType.REQUIRED)
  | @Begin(flushMode=FlushModeType.MANUAL)
  | public String createNewTarget() {
  | 	System.out.println("method entered (fm=manual we hope)");
  | 	m_target = new Target();
  | 	m_target.setTargetSourceList(new ArrayList<TargetSourceModule>());
  | 
  | 	m_target.setKey("akey");
  | 	m_target.setName("Name");
  | 	System.out.println("method before persist()");
  | 	m_daoBuilder.save(m_target);
  | 	System.out.println("method after persist()");
  | 	return "newtarget";
  | }
  | 

and when this gets called Hibernate immediately inserts the record:

  | 01:26:41,964 DEBUG [SeamPhaseListener] before phase: INVOKE_APPLICATION 5
  | method entered (fm=manual we hope)
  | method before persist()
  | Hibernate: select nextval ('ab_target_sq')
  | *** fix: shouldDelayetc=false, fm=AUTO, ria=true
  | Hibernate: insert into ab_target (tgt_autoDiscover, tgt_key, tgt_name, tgt_repository_version, tgtid) values (?, ?, ?, ?, ?)
  | method after persist()
  | 01:27:03,786 DEBUG [Manager] Beginning long-running conversation
  | 

The ***fix line is displayed around the fix you proposed. As you can see flushmode is manual and requireimmediateresult is true.

I have debugged thru Seam and found one very odd thing though- the @Begin annotation seems to set the flushmode etc after the method is invoked, not before! It is done in ConversationInterceptor.aroundInvoke; the pertinent code is:

  | Object result = invocation.proceed();   
  | beginConversationIfNecessary(method, result);
  | endConversationIfNecessary(method, result);
  | return result;
  | 

The call to "beginConversation" sets the flush mode,  but after the deed has been done. I don't yet know if this is the cause of the problem but having the annotation "start" after the method call seems weird to me to say the least.


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