EntityManagerFactory entityManagerFactory = entityManagerSessionFactory.getEntityManagerFactory();
String executionId = runtimeService.startProcessInstanceByKey("JPAVariableProcess").getProcessInstanceId();
String variableName = "name";
FieldAccessJPAEntity entity = new FieldAccessJPAEntity();
entity.setId(1L);
entity.setValue("Test");
EntityManager manager = entityManagerFactory.createEntityManager();
manager.getTransaction().begin();
manager.persist(entity);
manager.flush();
manager.getTransaction().commit();
manager.close();
Task task = taskService.createTaskQuery().processInstanceId(executionId).taskName("my task").singleResult();
runtimeService.setVariable(executionId, variableName, entity);
taskService.complete(task.getId());
List<HistoricDetail> variableUpdates = historyService.createHistoricDetailQuery().processInstanceId(executionId).variableUpdates().list();
assertEquals(1, variableUpdates.size());
HistoricVariableUpdate update = (HistoricVariableUpdate) variableUpdates.get(0);
assertNotNull(update.getValue());
assertTrue(update.getValue() instanceof FieldAccessJPAEntity);
assertEquals(entity.getId(), ((FieldAccessJPAEntity)update.getValue()).getId());
}