{
if (readHandlerFactory == null)
{
readHandlerFactory = new DataSourceProviderReadHandlerFactory();
final Configuration config = ClassicEngineBoot.getInstance().getGlobalConfig();
final Iterator propertyKeys = config.findPropertyKeys(PREFIX_SELECTOR);
while (propertyKeys.hasNext())
{
final String key = (String) propertyKeys.next();
final String value = config.getConfigProperty(key);
if (value != null)