@RequiredWriteAction @Override public void processEvents(@NotNull List<VFileEvent> events) { ApplicationManager.getApplication().assertWriteAccessAllowed(); List<VFileEvent> validated = validateEvents(events); BulkFileListener publisher = myEventBus.syncPublisher(VirtualFileManager.VFS_CHANGES); publisher.before(validated); THashMap<VirtualFile, List<VFileEvent>> parentToChildrenEventsChanges = null; for (VFileEvent event : validated) { VirtualFile changedParent = null; if (event instanceof VFileCreateEvent) { changedParent = ((VFileCreateEvent) event).getParent(); ((VFileCreateEvent) event).resetCache(); } else if (event instanceof VFileDeleteEvent) { changedParent = ((VFileDeleteEvent) event).getFile().getParent(); } if (changedParent != null) { if (parentToChildrenEventsChanges == null) parentToChildrenEventsChanges = new THashMap<VirtualFile, List<VFileEvent>>(); List<VFileEvent> parentChildrenChanges = parentToChildrenEventsChanges.get(changedParent); if (parentChildrenChanges == null) { parentToChildrenEventsChanges.put( changedParent, parentChildrenChanges = new SmartList<VFileEvent>()); } parentChildrenChanges.add(event); } else { applyEvent(event); } } if (parentToChildrenEventsChanges != null) { parentToChildrenEventsChanges.forEachEntry( new TObjectObjectProcedure<VirtualFile, List<VFileEvent>>() { @Override public boolean execute(VirtualFile parent, List<VFileEvent> childrenEvents) { applyChildrenChangeEvents(parent, childrenEvents); return true; } }); parentToChildrenEventsChanges.clear(); } publisher.after(validated); }