Passing JPA process variable to callactivity

[hheckel]

Hello all,

can anybody point me in the right direction, if and how JPA process variables can be passed to a call activity?

Thanks and best regards,
Holger.

[p4w3l]

Just define "Input parameters" in "Main config" of your callactivity object by filling 'Source' and 'Target' where source is process variable name ( can be of type JPA or not ) and target is desired variable name in called process.

[hheckel]

Thanks for the quick response.

That's exactly what I tried, but I receive the following error message:


…
Mar 7, 2013 12:58:25 AM org.activiti.engine.impl.interceptor.CommandContext close
SEVERE: Error while closing command context
org.activiti.engine.ActivitiException: Couldn't serialize value 'org.apache.openjpa.enhance.com$mycompany$myapp$jpa$model$MyJPAClass$pcsubclass@6ebe8853' in variable 'jpaParameter'
at org.activiti.engine.impl.variable.SerializableType.serialize(SerializableType.java:98)
at org.activiti.engine.impl.variable.SerializableType.setValue(SerializableType.java:73)
…
Caused by: java.io.NotSerializableException: org.apache.openjpa.enhance.RedefinitionHelper$1
…


[p4w3l]

For me it works on EclipseLink. My JPA objects don't implement Serialisable but maybe yours in OpenJPA they should?

[frederikherema1]

Since activiti is using the "SerializableType" instead of the "JPAEntityType", there is something wrong:

• Is activiti configured to use JPA (entityManagerFactory set on process-engine configuration)


• Is the entity's ID annotated using @ID? see user guide for the requirements to use JPAVariables out of the box

[hheckel]

- Yes, activiti has been configured to use JPA
- Yes, the entity's ID has been annotated using @Id

The process variable is created and persisted prior to starting the process instance. The act_ru_variable table shows the variable as 'jpa-entity', it refers to the correct java class and it's data fields are accessible to the engine (gateways in the process definition are executed correctly based on the entity's values).
The problem occurs, when I am trying to pass the variable as a parameter to the call activity as described above.

Any ideas? Thanks!

[hheckel]

Update:

I followed the example configuration in the book 'Activiti in Action' (a "must read", btw…)

Works like a charm now.

Thanks for everybody's input!

[ronald_van_kuij]

What was the issue? Can you elaborate, so it might help others?

[hheckel]

Can't really tell what the problem was, but I did follow the documentation in the book, which seems to go a little more into details compared to the user guide.