deferred reload for dispatcher

* when adding several media servers, reload all of them instead of
reload after each insert

kamailio/db_queries_kazoo.cfg

@@ -1,5 +1,5 @@
 ####### Database queries ########
-#!substdef "!KZQ_CHECK_MEDIA_SERVER_INSERT!insert into dispatcher (setid, destination) select \$var(SetId), \"\$var(MediaUrl)\" where not exists(select * from dispatcher where destination = \"\$var(MediaUrl)\")!g"
+#!substdef "!KZQ_CHECK_MEDIA_SERVER_INSERT!insert into dispatcher (setid, destination, flags, attrs, description) select \$var(SetId), \"\$var(MediaUrl)\", \$var(flags), \"\$var(attrs)\", \"added by nodes role\"  where not exists(select * from dispatcher where destination = \"\$var(MediaUrl)\")!g"
 #!substdef "!KZQ_COUNT_ALL_SUBSCRIBERS!select a.event, count(distinct watcher_username || \"@\" || watcher_domain) count_unique, count(*) count from event_list a, active_watchers b where b.event = a.event group by a.event!g"
 #!substdef "!KZQ_COUNT_PRESENTITIES!select event, (select count(*) from presentity b where username = \"\$(var(payload){kz.json,From}{uri.user})\" and domain = \"\$(var(payload){kz.json,From}{uri.domain})\" and b.event = a.event) count from event_list a!g"
 #!substdef "!KZQ_COUNT_SUBSCRIBERS!select event, (select count(*) from active_watchers b where presentity_uri = \"\$var(presentity)\" and b.event = a.event) count from event_list a union select \"self\", count(*) from presentities where presentity_uri = \"\$var(presentity)\"!g"

kamailio/dispatcher-role.cfg

@@ -4,6 +4,7 @@ modparam("htable", "htable", "failover=>size=16;autoexpire=120")
 #!trydef KZ_DISPATCHER_PROBE_MODE 1
 #!trydef DISPATCHER_ADD_SERVERS 1
 #!trydef DISPATCHER_ALG 0
+#!trydef KZ_DISPATCHER_ADD_FLAGS 10
 
 kazoo.dispatcher_auto_add = DISPATCHER_ADD_SERVERS descr "adds media servers reported by ecallmgr"
 kazoo.dispatcher_algorithm = DISPATCHER_ALG descr "dispatcher algorithm to use"
@@ -36,6 +37,15 @@ modparam("dispatcher", "ds_ping_from", "sip:sipcheck@MY_HOSTNAME")
 ## 10 - Presence servers (if not locally handled)
 ## 20 - Registrar servers (if not locally handled)
 
+
+####### RTIMER module for dispatcher reload ##########
+#!ifndef RTIMER_LOADED
+loadmodule "rtimer.so"
+#!trydef RTIMER_LOADED
+#!endif
+modparam("rtimer", "timer", "name=dispatcher_reload;interval=20;mode=1;")
+modparam("rtimer", "exec", "timer=dispatcher_reload;route=DISPATCHER_RELOAD")
+
 ####### Dispatcher Logic ########
 route[DISPATCHER_CLASSIFY_SOURCE]
 {
@@ -232,21 +242,27 @@ route[DISPATCHER_CHECK_MEDIA_SERVER]
        if($var(Zone) != "MY_AMQP_ZONE") {
           $var(SetId) = 2;
        }
-       if($(var(MediaUrl){uri.port}) == 12000) {
-          $var(SetId) = $var(SetId) + 50;
-       }
-       $var(flags) = 10;
+       $var(flags) = KZ_DISPATCHER_ADD_FLAGS;
        $var(attrs) = $_s(zone=$var(Zone);profile=$var(MediaProfile);idx=$(var(MediaUrl){s.corehash, MEDIA_SERVERS_HASH_SIZE});node=$var(MediaName));
-       sql_query("exec", "insert into dispatcher (setid, destination, flags, attrs, description) select $var(SetId), \"$var(MediaUrl)\", $var(flags), \"$var(attrs)\", \"added by nodes role\"  where not exists(select * from dispatcher where destination = \"$var(MediaUrl)\")");
+       #!import_file "dispatcher-custom-media-check.cfg"
+       sql_query("exec", "KZQ_CHECK_MEDIA_SERVER_INSERT");
        if($sqlrows(exec) > 0) {
-          xlog("L_WARNING", "reloading dispatcher table\n");
-          ds_reload();
+          $shv(dispatcher_reload) = 1;
           return 1;
        }
    }
    return 0;
 }
 
+route[DISPATCHER_RELOAD]
+{
+   if($shv(dispatcher_reload) == 1) {
+      xlog("L_WARNING", "reloading dispatcher table\n");
+      ds_reload();
+   };
+   $shv(dispatcher_reload) = 0;  
+}
+
 route[DISPATCHER_STATUS]
 {
     jsonrpc_exec('{"jsonrpc": "2.0", "method": "dispatcher.list", "id": 1}');