/*
* Creates a task pool for a given step
*/
@Override
public void createPoolTasks(
Context context,
XmlWorkflowItem wi,
RoleMembers assignees,
Step step,
WorkflowActionConfig action)
throws SQLException, AuthorizeException {
// create a tasklist entry for each eperson
for (EPerson anEpa : assignees.getEPersons()) {
PoolTask task = poolTaskService.create(context);
task.setStepID(step.getId());
task.setWorkflowID(step.getWorkflow().getID());
task.setEperson(anEpa);
task.setActionID(action.getId());
task.setWorkflowItem(wi);
poolTaskService.update(context, task);
// Make sure this user has a task
grantUserAllItemPolicies(context, wi.getItem(), anEpa);
}
for (Group group : assignees.getGroups()) {
PoolTask task = poolTaskService.create(context);
task.setStepID(step.getId());
task.setWorkflowID(step.getWorkflow().getID());
task.setGroup(group);
task.setActionID(action.getId());
task.setWorkflowItem(wi);
poolTaskService.update(context, task);
// Make sure this user has a task
grantGroupAllItemPolicies(context, wi.getItem(), group);
}
}
/*
* Claims an action for a given eperson
*/
@Override
public void createOwnedTask(
Context context, XmlWorkflowItem wi, Step step, WorkflowActionConfig action, EPerson e)
throws SQLException, AuthorizeException {
ClaimedTask task = claimedTaskService.create(context);
task.setWorkflowItem(wi);
task.setStepID(step.getId());
task.setActionID(action.getId());
task.setOwner(e);
task.setWorkflowID(step.getWorkflow().getID());
claimedTaskService.update(context, task);
// Make sure this user has a task
grantUserAllItemPolicies(context, wi.getItem(), e);
}
protected WorkflowActionConfig processNextStep(
Context c,
EPerson user,
Workflow workflow,
ActionResult currentOutcome,
XmlWorkflowItem wfi,
Step nextStep)
throws SQLException, IOException, AuthorizeException, WorkflowException,
WorkflowConfigurationException {
WorkflowActionConfig nextActionConfig;
if (nextStep != null) {
nextActionConfig = nextStep.getUserSelectionMethod();
nextActionConfig.getProcessingAction().activate(c, wfi);
// nextActionConfig.getProcessingAction().generateTasks();
if (nextActionConfig.requiresUI()) {
// Since a new step has been started, stop executing actions once one with a user interface
// is present.
c.restoreAuthSystemState();
return nextActionConfig;
} else {
ActionResult newOutcome =
nextActionConfig.getProcessingAction().execute(c, wfi, nextStep, null);
c.restoreAuthSystemState();
return processOutcome(c, user, workflow, nextStep, nextActionConfig, newOutcome, wfi, true);
}
} else {
if (currentOutcome.getResult() != ActionResult.OUTCOME_COMPLETE) {
c.restoreAuthSystemState();
throw new WorkflowException(
"No alternate step was found for outcome: " + currentOutcome.getResult());
}
archive(c, wfi);
c.restoreAuthSystemState();
return null;
}
}
/*
* Executes an action and returns the next.
*/
@Override
public WorkflowActionConfig doState(
Context c,
EPerson user,
HttpServletRequest request,
int workflowItemId,
Workflow workflow,
WorkflowActionConfig currentActionConfig)
throws SQLException, AuthorizeException, IOException, MessagingException, WorkflowException {
try {
XmlWorkflowItem wi = xmlWorkflowItemService.find(c, workflowItemId);
Step currentStep = currentActionConfig.getStep();
if (currentActionConfig.getProcessingAction().isAuthorized(c, request, wi)) {
ActionResult outcome =
currentActionConfig.getProcessingAction().execute(c, wi, currentStep, request);
return processOutcome(
c, user, workflow, currentStep, currentActionConfig, outcome, wi, false);
} else {
throw new AuthorizeException("You are not allowed to to perform this task.");
}
} catch (WorkflowConfigurationException e) {
log.error(
LogManager.getHeader(
c,
"error while executing state",
"workflow: "
+ workflow.getID()
+ " action: "
+ currentActionConfig.getId()
+ " workflowItemId: "
+ workflowItemId),
e);
WorkflowUtils.sendAlert(request, e);
throw new WorkflowException(e);
}
}
protected void activateFirstStep(
Context context, Workflow wf, Step firstStep, XmlWorkflowItem wfi)
throws AuthorizeException, IOException, SQLException, WorkflowException,
WorkflowConfigurationException {
WorkflowActionConfig firstActionConfig = firstStep.getUserSelectionMethod();
firstActionConfig.getProcessingAction().activate(context, wfi);
log.info(
LogManager.getHeader(
context,
"start_workflow",
firstActionConfig.getProcessingAction()
+ " workflow_item_id="
+ wfi.getID()
+ "item_id="
+ wfi.getItem().getID()
+ "collection_id="
+ wfi.getCollection().getID()));
// record the start of the workflow w/provenance message
recordStart(context, wfi.getItem(), firstActionConfig.getProcessingAction());
// Fire an event !
logWorkflowEvent(
context,
firstStep.getWorkflow().getID(),
null,
null,
wfi,
null,
firstStep,
firstActionConfig);
// If we don't have a UI activate it
if (!firstActionConfig.requiresUI()) {
ActionResult outcome =
firstActionConfig.getProcessingAction().execute(context, wfi, firstStep, null);
processOutcome(context, null, wf, firstStep, firstActionConfig, outcome, wfi, true);
}
}
protected void logWorkflowEvent(
Context c,
String workflowId,
String previousStepId,
String previousActionConfigId,
XmlWorkflowItem wfi,
EPerson actor,
Step newStep,
WorkflowActionConfig newActionConfig)
throws SQLException {
try {
// Fire an event so we can log our action !
Item item = wfi.getItem();
Collection myCollection = wfi.getCollection();
String workflowStepString = null;
List<EPerson> currentEpersonOwners = new ArrayList<EPerson>();
List<Group> currentGroupOwners = new ArrayList<Group>();
// These are only null if our item is sent back to the submission
if (newStep != null && newActionConfig != null) {
workflowStepString = workflowId + "." + newStep.getId() + "." + newActionConfig.getId();
// Retrieve the current owners of the task
List<ClaimedTask> claimedTasks = claimedTaskService.find(c, wfi, newStep.getId());
List<PoolTask> pooledTasks = poolTaskService.find(c, wfi);
for (PoolTask poolTask : pooledTasks) {
if (poolTask.getEperson() != null) {
currentEpersonOwners.add(poolTask.getEperson());
} else {
currentGroupOwners.add(poolTask.getGroup());
}
}
for (ClaimedTask claimedTask : claimedTasks) {
currentEpersonOwners.add(claimedTask.getOwner());
}
}
String previousWorkflowStepString = null;
if (previousStepId != null && previousActionConfigId != null) {
previousWorkflowStepString =
workflowId + "." + previousStepId + "." + previousActionConfigId;
}
// Fire our usage event !
UsageWorkflowEvent usageWorkflowEvent =
new UsageWorkflowEvent(
c, item, wfi, workflowStepString, previousWorkflowStepString, myCollection, actor);
usageWorkflowEvent.setEpersonOwners(
currentEpersonOwners.toArray(new EPerson[currentEpersonOwners.size()]));
usageWorkflowEvent.setGroupOwners(
currentGroupOwners.toArray(new Group[currentGroupOwners.size()]));
DSpaceServicesFactory.getInstance().getEventService().fireEvent(usageWorkflowEvent);
} catch (Exception e) {
// Catch all errors we do not want our workflow to crash because the logging threw an
// exception
log.error(
LogManager.getHeader(
c, "Error while logging workflow event", "Workflow Item: " + wfi.getID()),
e);
}
}
@Override
public WorkflowActionConfig processOutcome(
Context c,
EPerson user,
Workflow workflow,
Step currentStep,
WorkflowActionConfig currentActionConfig,
ActionResult currentOutcome,
XmlWorkflowItem wfi,
boolean enteredNewStep)
throws IOException, AuthorizeException, SQLException, WorkflowException {
if (currentOutcome.getType() == ActionResult.TYPE.TYPE_PAGE
|| currentOutcome.getType() == ActionResult.TYPE.TYPE_ERROR) {
// Our outcome is a page or an error, so return our current action
c.restoreAuthSystemState();
return currentActionConfig;
} else if (currentOutcome.getType() == ActionResult.TYPE.TYPE_CANCEL
|| currentOutcome.getType() == ActionResult.TYPE.TYPE_SUBMISSION_PAGE) {
// We either pressed the cancel button or got an order to return to the submission page, so
// don't return an action
// By not returning an action we ensure ourselfs that we go back to the submission page
c.restoreAuthSystemState();
return null;
} else if (currentOutcome.getType() == ActionResult.TYPE.TYPE_OUTCOME) {
Step nextStep = null;
WorkflowActionConfig nextActionConfig = null;
try {
// We have completed our action search & retrieve the next action
if (currentOutcome.getResult() == ActionResult.OUTCOME_COMPLETE) {
nextActionConfig = currentStep.getNextAction(currentActionConfig);
}
if (nextActionConfig != null) {
// We remain in the current step since an action is found
nextStep = currentStep;
nextActionConfig.getProcessingAction().activate(c, wfi);
if (nextActionConfig.requiresUI() && !enteredNewStep) {
createOwnedTask(c, wfi, currentStep, nextActionConfig, user);
return nextActionConfig;
} else if (nextActionConfig.requiresUI() && enteredNewStep) {
// We have entered a new step and have encountered a UI, return null since the current
// user doesn't have anything to do with this
c.restoreAuthSystemState();
return null;
} else {
ActionResult newOutcome =
nextActionConfig.getProcessingAction().execute(c, wfi, currentStep, null);
return processOutcome(
c, user, workflow, currentStep, nextActionConfig, newOutcome, wfi, enteredNewStep);
}
} else if (enteredNewStep) {
// If the user finished his/her step, we keep processing until there is a UI step action
// or no step at all
nextStep = workflow.getNextStep(c, wfi, currentStep, currentOutcome.getResult());
c.turnOffAuthorisationSystem();
nextActionConfig = processNextStep(c, user, workflow, currentOutcome, wfi, nextStep);
// If we require a user interface return null so that the user is redirected to the
// "submissions page"
if (nextActionConfig == null || nextActionConfig.requiresUI()) {
return null;
} else {
return nextActionConfig;
}
} else {
ClaimedTask task = claimedTaskService.findByWorkflowIdAndEPerson(c, wfi, user);
// Check if we have a task for this action (might not be the case with automatic steps)
// First add it to our list of finished users, since no more actions remain
workflowRequirementsService.addFinishedUser(c, wfi, user);
c.turnOffAuthorisationSystem();
// Check if our requirements have been met
if ((currentStep.isFinished(c, wfi)
&& currentOutcome.getResult() == ActionResult.OUTCOME_COMPLETE)
|| currentOutcome.getResult() != ActionResult.OUTCOME_COMPLETE) {
// Delete all the table rows containing the users who performed this task
workflowRequirementsService.clearInProgressUsers(c, wfi);
// Remove all the tasks
deleteAllTasks(c, wfi);
nextStep = workflow.getNextStep(c, wfi, currentStep, currentOutcome.getResult());
nextActionConfig = processNextStep(c, user, workflow, currentOutcome, wfi, nextStep);
// If we require a user interface return null so that the user is redirected to the
// "submissions page"
if (nextActionConfig == null || nextActionConfig.requiresUI()) {
return null;
} else {
return nextActionConfig;
}
} else {
// We are done with our actions so go to the submissions page but remove action
// ClaimedAction first
deleteClaimedTask(c, wfi, task);
c.restoreAuthSystemState();
nextStep = currentStep;
nextActionConfig = currentActionConfig;
return null;
}
}
} catch (Exception e) {
log.error("error while processing workflow outcome", e);
e.printStackTrace();
} finally {
if ((nextStep != null && currentStep != null && nextActionConfig != null)
|| (wfi.getItem().isArchived() && currentStep != null)) {
logWorkflowEvent(
c,
currentStep.getWorkflow().getID(),
currentStep.getId(),
currentActionConfig.getId(),
wfi,
user,
nextStep,
nextActionConfig);
}
}
}
log.error(LogManager.getHeader(c, "Invalid step outcome", "Workflow item id: " + wfi.getID()));
throw new WorkflowException("Invalid step outcome");
}