/**
* Cycles through the cached web data sources and calls update on all of them.
*/
private void doUpdates() {
final UpdateService service = new UpdateService(serviceClassLoader);
final Iterator<CachedWebDataSource> iterator = service.getDataSources();
while (iterator.hasNext()) {
final CachedWebDataSource source = iterator.next();
try {
source.update();
} catch (UpdateException ex) {