returns the singleton instance of routingmanager , creating it if necessary . concode_field_sep String UPDATE_RULE_POSITION concode_elem_sep RoutingManager singleton concode_elem_sep Logger Log concode_elem_sep Comparator<RoutingRule> positionComparator concode_elem_sep Comparator<RequestQueue> queueComparator concode_elem_sep String DELETE_ROUTING_RULE concode_elem_sep String LOAD_RULES concode_elem_sep String ADD_ROUTING_RULE concode_field_sep void routeRequest concode_elem_sep int compare concode_elem_sep int compare concode_elem_sep RequestQueue getBestQueue concode_elem_sep Collection<RoutingRule> getRoutingRules concode_elem_sep void addRoutingRule concode_elem_sep void updateRoutingRule concode_elem_sep void shutdown concode_elem_sep void removeRoutingRule
RoutingManager function ( ) { return singleton ; }