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
message = updateSummaryVisible();
		} else if (selection.size() == 1) {
			
			ConcreteMarker marker = (ConcreteMarker)selection.getFirstElement();
			message = marker.getDescription(); 
		} else if (selection.size() > 1) {
			
			message = updateSummarySelected(selection);
		}
		getViewSite().getActionBars().getStatusLineManager().setMessage(message);		
	}
	/**
	 * @param selection
	 * @return
	 */
	protected String updateSummarySelected(IStructuredSelection selection) {
		
		return Messages.format("marker.statusSummarySelected", new Object[] {new Integer(selection.size()), ""}); 
	}
	/**
	 * @return
	 */
	protected String updateSummaryVisible() {
		return ""; 
	}
	public abstract void openFiltersDialog();
	
	/**
	 * Given a selection of IMarker, reveals the corresponding elements in the viewer