Bug 55090 [Progress] How to show busy in multiple instances of the same view
Currently to get the view busy indicator you have to schedule a job in a workbench part. But what happens when there are multiple instances of a view created, which view should be busy. Ideally, you could instead associate a view type with a job.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
if (monitor.isCanceled()) {
				return;
			}
			
			monitor.subTask(SEARCHING_FOR_MARKERS);
			SubProgressMonitor subMonitor = new SubProgressMonitor(monitor, 10);
			currentMarkers = MarkerList.compute(getFilter(), subMonitor, true);
			
			if (monitor.isCanceled()) {
				return;								
			}
			if (markerCountDirty) {
				monitor.subTask(REFRESHING_MARKER_COUNTS);
				totalMarkers = MarkerList.compute(getMarkerTypes()).length;
				markerCountDirty = false;
			}
			
		} catch (CoreException e) {
			throw new InvocationTargetException(e);
		} finally {
			jobMan.endRule(root);
		}
		
		if (monitor.isCanceled()) {
			return;
		}