odissey: add default route support

core/od_config.c

@@ -47,6 +47,7 @@ static odkeyword_t od_config_keywords[] =
 	od_keyword("server",     OD_LSERVER),
 	/* routing */
 	od_keyword("routing",    OD_LROUTING),
+	od_keyword("default",    OD_LDEFAULT),
 	od_keyword("route",      OD_LROUTE),
 	od_keyword("mode",       OD_LMODE),
 	od_keyword("database",   OD_LDATABASE),
@@ -265,7 +266,12 @@ od_configparse_route(odconfig_t *config, odtoken_t *name)
 		od_schemeroute_add(config->scheme);
 	if (route == NULL)
 		return -1;
+	if (name == NULL) {
+		route->is_default = 1;
+		route->target = "";
+	} else {
 		route->target = name->v.string;
+	}
 	if (od_confignext(config, '{', NULL) == -1)
 		return -1;
 	odtoken_t *tk;
@@ -355,6 +361,12 @@ od_configparse_routing(odconfig_t *config)
 			if (rc == -1)
 				return -1;
 			break;
+		/* route default */
+		case OD_LDEFAULT:
+			rc = od_configparse_route(config, NULL);
+			if (rc == -1)
+				return -1;
+			break;
 		case OD_LEOF:
 			od_configerror(config, tk, "unexpected end of config file");
 			return -1;

core/od_config.h

@@ -24,6 +24,7 @@ enum {
 	OD_LCLIENT_MAX,
 	OD_LSERVER,
 	OD_LROUTING,
+	OD_LDEFAULT,
 	OD_LROUTE,
 	OD_LMODE,
 	OD_LDATABASE,

core/od_scheme.c

@@ -28,6 +28,7 @@ void od_schemeinit(odscheme_t *scheme)
 	scheme->pooling_mode = OD_PUNDEF;
 	scheme->routing = NULL;
 	scheme->routing_mode = OD_RUNDEF;
+	scheme->routing_default = NULL;
 	scheme->server_id = 0;
 	od_listinit(&scheme->servers);
 	od_listinit(&scheme->routing_table);
@@ -158,6 +159,8 @@ int od_schemevalidate(odscheme_t *scheme, odlog_t *log)
 		}
 	}
 
+	odscheme_route_t *default_route = NULL;
+
 	/* routing table */
 	od_listforeach(&scheme->routing_table, i) {
 		odscheme_route_t *route;
@@ -173,7 +176,15 @@ int od_schemevalidate(odscheme_t *scheme, odlog_t *log)
 			         route->route);
 			return -1;
 		}
+		if (route->is_default) {
+			if (default_route) {
+				od_error(log, "more than one default route");
+				return -1;
 			}
+			default_route = route;
+		}
+	}
+	scheme->routing_default = default_route;
 	return 0;
 }
 
@@ -208,8 +219,10 @@ void od_schemeprint(odscheme_t *scheme, odlog_t *log)
 	od_listforeach(&scheme->routing_table, i) {
 		odscheme_route_t *route;
 		route = od_container_of(i, odscheme_route_t, link);
-		od_log(log, "  <%s>", route->database);
+		od_log(log, "  <%s>", route->target);
 		od_log(log, "    route '%s'", route->route);
+		if (route->database)
+			od_log(log, "    database '%s'", route->database);
 		if (route->user)
 			od_log(log, "    user '%s'", route->user);
 		if (route->password)

core/od_scheme.h

@@ -35,6 +35,7 @@ struct odscheme_server_t {
 
 struct odscheme_route_t {
 	odscheme_server_t *server;
+	int                is_default;
 	char              *target;
 	char              *route;
 	char              *database;
@@ -65,6 +66,7 @@ struct odscheme_t {
 	/* routing */
 	char             *routing;
 	odrouting_t       routing_mode;
+	odscheme_route_t *routing_default;
 	odlist_t          routing_table;
 };
 

odissey.conf

@@ -36,7 +36,15 @@ odissey {
 
 	routing {
 		mode "forward" # round-robin
-		"*" {
+		"testdb" {
+			route "default"
+			pool_min 0
+			pool_max 100
+			client_max 100
+			# force user, db, limits
+		}
+
+		default {
 			route "default"
 			pool_min 0
 			pool_max 100