Split out direct and topic routing

src/rabbit_exchange.erl

@@ -185,48 +185,43 @@ simple_publish(Mandatory, Immediate,
 route(#exchange{name = Name, type = topic}, RoutingKey) ->
     route_internal(Name, RoutingKey, fun topic_matches/2);
 
-% This matches for the direct exchanges and tries to short-cut the routing table
-% for the default queue if that is what the user supplied
-
-% route(#exchange{name = Name = #resource{name = <<>>}, type = direct}, RoutingKey) ->
-%     case route_internal(Name, RoutingKey) of
-%         [] -> route_internal(Name, RoutingKey, fun(X,Y) -> X == Y end);
-%         Other -> Other
-%     end;
-
 route(#exchange{name = Name, type = Type}, RoutingKey) ->
-    route_internal(Name, RoutingKey, fun(X,Y) -> X == Y end).
+    route_internal(Name, RoutingKey).
 
 % This returns a list of QPids to route to.
 % Maybe this should be handled by a cursor instead.
 % This routes directly to queues, avoiding any lookup of routes
-
-% route_internal(#resource{name = <<>>, virtual_host = VHostPath}, RoutingKey) ->
-%     Query = qlc:q([QPid || #amqqueue{name = Queue, pid = QPid} <- mnesia:table(amqqueue),
-%                            Queue == rabbit_misc:r(VHostPath, queue, RoutingKey)]),
-%     mnesia:activity(async_dirty, fun() -> qlc:e(Query) end).
-
+route_internal(#resource{name = Name, virtual_host = VHostPath}, RoutingKey) ->
+    MatchHead = #route{binding = #binding{exchange_name = '$1',
+                                      queue_name = '$2',
+                                      key = '$3'}},
+    %MatchHead = #person{name='$1', sex=male, age='$2', _='_'},
+    Guards = [{'==', '$1', Name}, {'==', '$3', RoutingKey}],
+    lookup_qpids(
+        mnesia:activity(async_dirty,
+                        fun() -> mnesia:select(route,[{MatchHead, Guards, ['$2']}])
+                        end)).
+    
 % This returns a list of QPids to route to.
 % Maybe this should be handled by a cursor instead.
 route_internal(Exchange, RoutingKey, MatchFun) ->
     Query = qlc:q([QName || #route{binding = #binding{exchange_name = ExchangeName,
-                                                     queue_name = QName,
-                                                     key = BindingKey}} <- mnesia:table(route),
-                           ExchangeName == Exchange,
-                           MatchFun(BindingKey, RoutingKey)]),
-    Fun = fun() -> qlc:e(Query) end,    
-    {Time1,L} = timer:tc(mnesia,activity,[async_dirty,Fun]),
-    Set = sets:from_list(L),
-    Fun2 = fun() ->
+                                                      queue_name = QName,
+                                                      key = BindingKey}} <- mnesia:table(route),
+                            ExchangeName == Exchange,
+                            % This causes a full table scan (see bug 19336)
+                            MatchFun(BindingKey, RoutingKey)]),
+    lookup_qpids(mnesia:activity(async_dirty, fun() -> qlc:e(Query) end)).
+
+lookup_qpids(Queues) ->
+    Set = sets:from_list(Queues),
+    Fun = fun() ->
             sets:fold(
                 fun(Key, Acc) -> [#amqqueue{pid = QPid}] = mnesia:read({amqqueue, Key}),                                 
                                  [QPid] ++ Acc end, 
                 [], Set) end,
-    {Time2, QPids} = timer:tc(mnesia, activity, [async_dirty,Fun2]),    
-    io:format("Time 1 -> ~p~n",[Time1]),
-    io:format("Time 2 -> ~p~n",[Time2]),
-    QPids.
-    
+    mnesia:activity(async_dirty,Fun).
+        
 % Should all of the route and binding management not be refactored to it's own module
 % Especially seeing as unbind will have to be implemented for 0.91 ?
 delete_routes(Q = #amqqueue{name = Name}) ->