private WorkflowInstance safeGetWorkflowInstanceById(String workflowInstId) {
try {
return instRep.getWorkflowInstanceById(workflowInstId);
} catch (Exception e) {
return null;
}
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#getWorkflowInstanceMetadata(java.lang.String)
*/
public Metadata getWorkflowInstanceMetadata(String workflowInstId) {
// okay, try and look up that worker thread in our hash map
IterativeWorkflowProcessorThread worker =
(IterativeWorkflowProcessorThread) workerMap.get(workflowInstId);
if (worker == null) {
// try and get the metadata
// from the workflow instance repository (as it was persisted)
try {
WorkflowInstance inst = instRep.getWorkflowInstanceById(workflowInstId);
return inst.getSharedContext();
} catch (InstanceRepositoryException e) {
LOG.log(
Level.FINEST,
"WorkflowEngine: Attempt to get metadata "
+ "for workflow instance id: "
+ workflowInstId
+ ", however, this engine is "
+ "not tracking its execution and the id: ["
+ workflowInstId
+ "] "
+ "was never persisted to "
+ "the instance repository");
e.printStackTrace();
return new Metadata();
}
}
return worker.getWorkflowInstance().getSharedContext();
}
private synchronized void persistWorkflowInstance(WorkflowInstance wInst) throws EngineException {
try {
if (wInst.getId() == null || (wInst.getId() != null && wInst.getId().equals(""))) {
// we have to persist it by adding it
// rather than updating it
instRep.addWorkflowInstance(wInst);
} else {
// persist by update
instRep.updateWorkflowInstance(wInst);
}
} catch (InstanceRepositoryException e) {
e.printStackTrace();
throw new EngineException(e.getMessage());
}
}