/*
* (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();
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#startWorkflow(org.apache.oodt.cas.workflow.structs.Workflow,
* org.apache.oodt.cas.metadata.Metadata)
*/
public synchronized WorkflowInstance startWorkflow(Workflow workflow, Metadata metadata)
throws EngineException {
// to start the workflow, we create a default workflow instance
// populate it
// persist it
// add it to the worker map
// start it
WorkflowInstance wInst = new WorkflowInstance();
wInst.setWorkflow(workflow);
wInst.setCurrentTaskId(((WorkflowTask) workflow.getTasks().get(0)).getTaskId());
wInst.setSharedContext(metadata);
wInst.setStatus(CREATED);
persistWorkflowInstance(wInst);
IterativeWorkflowProcessorThread worker =
new IterativeWorkflowProcessorThread(wInst, instRep, this.wmgrUrl);
worker.setRClient(rClient);
workerMap.put(wInst.getId(), worker);
wInst.setStatus(QUEUED);
persistWorkflowInstance(wInst);
try {
pool.execute(worker);
} catch (InterruptedException e) {
throw new EngineException(e);
}
return wInst;
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#updateMetadata(java.lang.String,
* org.apache.oodt.cas.metadata.Metadata)
*/
public synchronized boolean updateMetadata(String workflowInstId, Metadata met) {
// okay, try and look up that worker thread in our hash map
IterativeWorkflowProcessorThread worker =
(IterativeWorkflowProcessorThread) workerMap.get(workflowInstId);
if (worker == null) {
LOG.log(
Level.WARNING,
"WorkflowEngine: Attempt to update metadata context "
+ "for workflow instance id: "
+ workflowInstId
+ ", however, this engine is "
+ "not tracking its execution");
return false;
}
worker.getWorkflowInstance().setSharedContext(met);
try {
persistWorkflowInstance(worker.getWorkflowInstance());
} catch (Exception e) {
LOG.log(
Level.WARNING,
"Exception persisting workflow instance: ["
+ worker.getWorkflowInstance().getId()
+ "]: Message: "
+ e.getMessage());
return false;
}
return true;
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#resumeWorkflowInstance(java.lang.String)
*/
public synchronized void resumeWorkflowInstance(String workflowInstId) {
// okay, try and look up that worker thread in our hash map
IterativeWorkflowProcessorThread worker =
(IterativeWorkflowProcessorThread) workerMap.get(workflowInstId);
if (worker == null) {
LOG.log(
Level.WARNING,
"WorkflowEngine: Attempt to resume workflow instance id: "
+ workflowInstId
+ ", however, this engine is "
+ "not tracking its execution");
return;
}
// also check to make sure that the worker is currently paused
// only can resume WorkflowInstances that are paused, right?
if (!worker.isPaused()) {
LOG.log(
Level.WARNING,
"WorkflowEngine: Attempt to resume a workflow that "
+ "isn't paused currently: instance id: "
+ workflowInstId);
return;
}
// okay, all good
worker.resume();
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.WorkflowEngine#stopWorkflow(java.lang.String)
*/
public synchronized void stopWorkflow(String workflowInstId) {
// okay, try and look up that worker thread in our hash map
IterativeWorkflowProcessorThread worker =
(IterativeWorkflowProcessorThread) workerMap.get(workflowInstId);
if (worker == null) {
LOG.log(
Level.WARNING,
"WorkflowEngine: Attempt to stop workflow instance id: "
+ workflowInstId
+ ", however, this engine is "
+ "not tracking its execution");
return;
}
worker.stop();
}