public synchronized boolean cancel(Item item) {
LOGGER.fine("Cancelling " + item.task.getFullDisplayName() + " item#" + item.id);
// use bitwise-OR to make sure that all the branches get evaluated all the time
boolean r =
(item instanceof WaitingItem && waitingList.remove(item))
| blockedProjects.remove(item)
| buildables.remove(item);
if (r) item.onCancelled();
return r;
}
/**
* Cancels the item in the queue. If the item is scheduled more than once, cancels the first
* occurrence.
*
* @return true if the project was indeed in the queue and was removed. false if this was no-op.
*/
public synchronized boolean cancel(Task p) {
LOGGER.fine("Cancelling " + p.getFullDisplayName());
for (Iterator<WaitingItem> itr = waitingList.iterator(); itr.hasNext(); ) {
Item item = itr.next();
if (item.task.equals(p)) {
itr.remove();
item.onCancelled();
return true;
}
}
// use bitwise-OR to make sure that both branches get evaluated all the time
return blockedProjects.cancel(p) != null | buildables.cancel(p) != null;
}
/** Works like {@link #remove(Object)} but also marks the {@link Item} as cancelled. */
public boolean cancel(Item t) {
boolean r = remove(t);
if (r) t.onCancelled();
return r;
}