jboss seam bijection problem

[talekar]

jboss seam 1.2.1

I am having trouble understanding how bijection work with jbpm. Here is a simple jpdl:

<process-definition name="MyWorkflow">

 <start-state name="start">
 <transition to="decide"></transition>
 </start-state>

 <decision name="decide" expression="#{myManager.result}">
 <transition to="assigntask" name="assigntask"></transition>
 <transition to="end" name="end"></transition>
 </decision>

 <task-node name="assigntask">
 <task name="Evaluate">
 <assignment actor-id="adminuser"></assignment>
 </task>
 <transition to="end" name="cancel"></transition>
 <transition to="decide" name="retry"></transition>
 </task-node>

 <end-state name="end"></end-state>

</process-definition>

Notice that the decision task calls #{myManager.decide} which a SFSB:

@Stateful
@Name ("myManager")
public class MyManagerImpl implements MyManager,
 Serializable {

 private static final long serialVersionUID = 1L;

 @Logger
 private Log LOG;

 @PersistenceContext (type = PersistenceContextType.EXTENDED)
 private EntityManager entityManager;

 @In (required = false)
 @Out (scope = BUSINESS_PROCESS, required = true)
 private Long id;

 @CreateProcess(definition = "MyWorkflow")
 public void begin() {
 id = new Long(10);
 }

 public String getResult() {
 // NPE :-(
 // why doesnt id get injected?
 int x = id.intValue();
 }

 @Remove
 @Destroy
 public void destroy() {
 }
}

I get a NPE in getResult() when it is called by jBPM. How come id never gets injected back?

I set logging to TRACE on org.jboss.seam.Component and I get the "injecting dependencies of" message when begin() is called. But I DONT see the same messages when the jBPM task node executes the getResult() expression.

Am I missing something in a config file?

Thanks in advance.

[talekar]

please help, i have been struggling with this for 3 days now. thanks

[wise_guybg]

Hi,

 @In (required = false)
 @Out (scope = BUSINESS_PROCESS, required = true)
 private Long id;

Doesn't @In have to use the scope = BUSINESS_PROCESS?

There is an example in the book "JBoss Seam - Simplicity and Power Beyond Java EE". There must be examples on the Internet and with Seam too. Have you double-checked against the source you're using?