if(lastUpdateTime == null){
java.util.Date date= new java.util.Date();
lastUpdateTime = new Timestamp(date.getTime());
}
EntityManager em = ResourceUtils.getEntityManager();
Node_Data existingNodeData = em.find(Node_Data.class, new Node_DataPK(workflowDataResource.getWorkflowInstanceID(), nodeID, executionIndex));
em.close();
em = ResourceUtils.getEntityManager();
em.getTransaction().begin();
Node_Data nodeData = new Node_Data();