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
Collection markers = Arrays.asList(currentMarkers.toArray());
		
		if (markerLimit != -1) {
			
			monitor.subTask(FILTERING_ON_MARKER_LIMIT);
			SubProgressMonitor mon = new SubProgressMonitor(monitor, 40);
			
			markers = SortUtil.getFirst(markers, getSorter(), markerLimit, mon);
			if (monitor.isCanceled()) return;
			currentMarkers = new MarkerList(markers);
		}
		monitor.subTask(QUEUEING_VIEWER_UPDATES);
		
		SubProgressMonitor sub = new SubProgressMonitor(monitor, 50);
		setContents(markers, sub);
		if (monitor.isCanceled()) return;
		
		uiJob.schedule();
		try {
			uiJob.join();
		} catch (InterruptedException e) {
			monitor.done();
		}
		
		monitor.done();
	}
	
	/**
	 * Causes the view to re-sync its contents with the workspace. Note that
	 * changes will be scheduled in a background job, and may not take effect