Remove router_options

Relaced router_options with configuration parameters in the createInstance
router entry point. The same needs to be done for the filter API as barely
any filters use the feature.

Some routers (binlogrouter) still support router_options but using it is
deprecated. This had to be done as their use wasn't deprecated in 2.2.

Documentation/Release-Notes/MaxScale-2.3.0-Release-Notes.md

@@ -58,6 +58,11 @@ The use of `router_options` with avrorouter was deprecated in MaxScale 2.1. In
 MaxScale 2.3, the use of `router_options` is no longer supported and the options
 should be given as parameters instead.
 
+### `router_options` in readwritesplit
+
+The use of `router_options` with readwritesplit, which was deprecated in
+MaxScale 2.2.0, has been removed in MaxScale 2.3.0.
+
 ### `QUERY-LAST-TRANSACTION` and `QUERY-TRANSACTION` CDC commands
 
 The CDC protocol no longer accepts the `QUERY-LAST-TRANSACTION` and

examples/roundrobinrouter.cpp

@@ -567,7 +567,7 @@ void RRRouter::decide_target(RRRouterSession* rses, GWBUF* querybuf, DCB*& targe
  * The functions implementing the router module API. These do not need to be
  * "extern C", but they do need to be callable from  C code.
  */
-static MXS_ROUTER* createInstance(SERVICE* service, char** options);
+static MXS_ROUTER* createInstance(SERVICE* service, MXS_CONFIG_PARAMETER* params);
 static MXS_ROUTER_SESSION* newSession(MXS_ROUTER* instance, MXS_SESSION* session);
 static void closeSession(MXS_ROUTER* instance, MXS_ROUTER_SESSION* session);
 static void freeSession(MXS_ROUTER* instance, MXS_ROUTER_SESSION* session);
@@ -663,7 +663,7 @@ MXS_MODULE* MXS_CREATE_MODULE()
  * @param options   The options for this query router
  * @return          NULL in failure, pointer to router in success.
  */
-static MXS_ROUTER* createInstance(SERVICE* service, char** options)
+static MXS_ROUTER* createInstance(SERVICE* service, MXS_CONFIG_PARAMETER* params)
 {
     RRRouter* instance = NULL;
     /* The core of MaxScale is written in C and does not understand exceptions.

examples/testroute.c

@@ -15,7 +15,7 @@
 #include <maxscale/router.h>
 #include <maxscale/modinfo.h>
 
-static MXS_ROUTER *createInstance(SERVICE *service, char **options);
+static MXS_ROUTER *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
 static void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *session);
 static void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *session);
@@ -94,8 +94,7 @@ MXS_MODULE* MXS_CREATE_MODULE()
  *
  * @return The instance data for this new instance
  */
-static  MXS_ROUTER  *
+static MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
-createInstance(SERVICE *service, char **options)
 {
     return (MXS_ROUTER*)MXS_MALLOC(sizeof(TESTROUTER));
 }

include/maxscale/router.h

@@ -90,11 +90,11 @@ typedef struct mxs_router_object
      * other API functions.
      *
      * @param service The service where the instance is created
-     * @param options Router options
+     * @param params  Parameters for the router
      *
      * @return New router instance on NULL on error
      */
-    MXS_ROUTER *(*createInstance)(SERVICE *service, char **options);
+    MXS_ROUTER *(*createInstance)(SERVICE* service, MXS_CONFIG_PARAMETER* params);
 
     /**
      * Called to create a new user session within the router
@@ -240,7 +240,7 @@ typedef struct mxs_router_object
  * must update these versions numbers in accordance with the rules in
  * modinfo.h.
  */
-#define MXS_ROUTER_VERSION  { 3, 1, 0 }
+#define MXS_ROUTER_VERSION  { 4, 0, 0 }
 
 /**
  * Specifies capabilities specific for routers. Common capabilities

include/maxscale/router.hh

@@ -98,7 +98,7 @@ protected:
  * class MyRouter : public maxscale::Router<MyRouter, MyRouterSession>
  * {
  * public:
- *      static MyRouter* create(SERVICE* pService, char** pzOptions);
+ *      static MyRouter* create(SERVICE* pService, MXS_CONFIG_PARAMETER* params);
  *
  *      MyRouterSession* newSession(MXS_SESSION* pSession);
  *
@@ -137,11 +137,11 @@ public:
         return false;
     }
 
-    static MXS_ROUTER* createInstance(SERVICE* pService, char** pzOptions)
+    static MXS_ROUTER* createInstance(SERVICE* pService, MXS_CONFIG_PARAMETER* params)
     {
         RouterType* pRouter = NULL;
 
-        MXS_EXCEPTION_GUARD(pRouter = RouterType::create(pService, pzOptions));
+        MXS_EXCEPTION_GUARD(pRouter = RouterType::create(pService, params));
 
         return pRouter;
     }

include/maxscale/service.h

@@ -129,7 +129,6 @@ typedef struct service
     SERV_LISTENER *ports;              /**< Linked list of ports and protocols
                                         * that this service will listen on */
     char *routerModule;                /**< Name of router module to use */
-    char **routerOptions;              /**< Router specific option strings */
     struct mxs_router_object *router;  /**< The router we are using */
     struct mxs_router *router_instance;/**< The router instance for this service */
     char version_string[MAX_SERVICE_VERSION_LEN]; /**< version string for this service listeners */

server/core/config.cc

@@ -3316,17 +3316,6 @@ int configure_new_service(CONFIG_CONTEXT *context, CONFIG_CONTEXT *obj)
             }
         }
 
-        if (roptions)
-        {
-            char *lasts;
-            char *s = strtok_r(roptions, ",", &lasts);
-            while (s)
-            {
-                serviceAddRouterOption(service, s);
-                s = strtok_r(NULL, ",", &lasts);
-            }
-        }
-
         if (filters)
         {
             if (!serviceSetFilters(service, filters))

server/core/internal/service.h

@@ -110,12 +110,6 @@ bool service_server_in_use(const SERVER *server);
 /** Update the server weights used by services */
 void service_update_weights();
 
-/**
- * Alteration of the service configuration
- */
-void  serviceAddRouterOption(SERVICE *service, char *option);
-void  serviceClearRouterOptions(SERVICE *service);
-
 /**
  * @brief Add parameters to a service
  *

server/core/service.cc

@@ -127,7 +127,6 @@ SERVICE* service_alloc(const char *name, const char *router)
     service->retry_start = true;
     service->conn_idle_timeout = SERVICE_NO_SESSION_TIMEOUT;
     service->svc_config_param = NULL;
-    service->routerOptions = NULL;
     service->log_auth_warnings = true;
     service->strip_db_esc = true;
     service->rate_limits = rate_limits;
@@ -420,47 +419,6 @@ int serviceStartAllPorts(SERVICE* service)
     return listeners;
 }
 
-/** Helper function for copying an array of strings */
-static char** copy_string_array(char** original)
-{
-    char **array = NULL;
-
-    if (original)
-    {
-        int values = 0;
-
-        while (original[values])
-        {
-            values++;
-        }
-
-        array = (char**)MXS_MALLOC(sizeof(char*) * (values + 1));
-
-        if (array)
-        {
-            for (int i = 0; i < values; i++)
-            {
-                array[i] = MXS_STRDUP_A(original[i]);
-            }
-            array[values] = NULL;
-        }
-    }
-    return array;
-}
-
-/** Helper function for freeing an array of strings */
-static void free_string_array(char** array)
-{
-    if (array)
-    {
-        for (int i = 0; array[i]; i++)
-        {
-            MXS_FREE(array[i]);
-        }
-        MXS_FREE(array);
-    }
-}
-
 /**
  * Start a service
  *
@@ -478,9 +436,8 @@ int serviceInitialize(SERVICE *service)
     service_calculate_weights(service);
 
     int listeners = 0;
-    char **router_options = copy_string_array(service->routerOptions);
 
-    if ((service->router_instance = service->router->createInstance(service, router_options)))
+    if ((service->router_instance = service->router->createInstance(service, service->svc_config_param)))
     {
         if (service->router->getCapabilities)
         {
@@ -503,8 +460,6 @@ int serviceInitialize(SERVICE *service)
         service->state = SERVICE_STATE_FAILED;
     }
 
-    free_string_array(router_options);
-
     return listeners;
 }
 
@@ -959,62 +914,6 @@ serviceHasBackend(SERVICE *service, SERVER *server)
     return ptr != NULL;
 }
 
-/**
- * Add a router option to a service
- *
- * @param service       The service to add the router option to
- * @param option        The option string
- */
-void
-serviceAddRouterOption(SERVICE *service, char *option)
-{
-    int i;
-
-    spinlock_acquire(&service->spin);
-    if (service->routerOptions == NULL)
-    {
-        service->routerOptions = (char **)MXS_CALLOC(2, sizeof(char *));
-        MXS_ABORT_IF_NULL(service->routerOptions);
-        service->routerOptions[0] = MXS_STRDUP_A(option);
-        service->routerOptions[1] = NULL;
-    }
-    else
-    {
-        for (i = 0; service->routerOptions[i]; i++)
-        {
-            ;
-        }
-        service->routerOptions = (char **)MXS_REALLOC(service->routerOptions, (i + 2) * sizeof(char *));
-        MXS_ABORT_IF_NULL(service->routerOptions);
-        service->routerOptions[i] = MXS_STRDUP_A(option);
-        service->routerOptions[i + 1] = NULL;
-    }
-    spinlock_release(&service->spin);
-}
-
-/**
- * Remove the router options for the service
- *
- * @param       service The service to remove the options from
- */
-void
-serviceClearRouterOptions(SERVICE *service)
-{
-    int i;
-
-    spinlock_acquire(&service->spin);
-    if (service->routerOptions != NULL)
-    {
-        for (i = 0; service->routerOptions[i]; i++)
-        {
-            MXS_FREE(service->routerOptions[i]);
-        }
-        MXS_FREE(service->routerOptions);
-        service->routerOptions = NULL;
-    }
-    spinlock_release(&service->spin);
-}
-
 /**
  * Set the service user that is used to log in to the backebd servers
  * associated with this service.
@@ -2427,18 +2326,7 @@ json_t* service_parameters_to_json(const SERVICE* service)
 {
     json_t* rval = json_object();
 
-    string options;
+    string options{config_get_string(service->svc_config_param, "router_options")};
-
-    if (service->routerOptions && service->routerOptions[0])
-    {
-        options += service->routerOptions[0];
-
-        for (int i = 1; service->routerOptions[i]; i++)
-        {
-            options += ",";
-            options += service->routerOptions[i];
-        }
-    }
 
     json_object_set_new(rval, CN_ROUTER_OPTIONS, json_string(options.c_str()));
     json_object_set_new(rval, CN_USER, json_string(service->credentials.name));

server/modules/routing/avrorouter/avro.cc

@@ -62,7 +62,6 @@ using namespace maxscale;
  */
 void Avro::read_source_service_options(SERVICE* source)
 {
-    char** options = source->routerOptions;
     MXS_CONFIG_PARAMETER* params = source->svc_config_param;
 
     for (MXS_CONFIG_PARAMETER* p = params; p; p = p->next)
@@ -77,28 +76,17 @@ void Avro::read_source_service_options(SERVICE* source)
         }
     }
 
-    if (options)
+    for (auto&& opt: mxs::strtok(config_get_string(params, "router_options"), ", \t"))
     {
-        for (int i = 0; options[i]; i++)
+        auto&& kv = mxs::strtok(opt, "=");
-        {
-            char option[strlen(options[i]) + 1];
-            strcpy(option, options[i]);
 
-            char *value = strchr(option, '=');
+        if (kv[0] == "binlogdir")
-            if (value)
         {
-                *value++ = '\0';
+            binlogdir = kv[1];
-                value = trim(value);
+        }
-
+        else if (kv[0] == "filestem")
-                if (strcmp(option, "binlogdir") == 0)
         {
-                    binlogdir = value;
+            filestem = kv[1];
-                }
-                else if (strcmp(option, "filestem") == 0)
-                {
-                    filestem = value;
-                }
-            }
         }
     }
 }

server/modules/routing/avrorouter/avro_main.cc

@@ -59,7 +59,7 @@ static bool conversion_task_ctl(Avro *inst, bool start);
  *
  * @return The instance data for this new instance
  */
-MXS_ROUTER* createInstance(SERVICE *service, char **options)
+MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
 {
     uint64_t block_size = config_get_size(service->svc_config_param, "block_size");
     mxs_avro_codec_type codec = static_cast<mxs_avro_codec_type>(config_get_enum(service->svc_config_param,

server/modules/routing/binlogrouter/blr.cc

@@ -54,7 +54,7 @@
 #include <maxscale/paths.h>
 
 /* The router entry points */
-static  MXS_ROUTER  *createInstance(SERVICE *service, char **options);
+static  MXS_ROUTER  *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static void free_instance(ROUTER_INSTANCE *instance);
 static  MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance,
                                        MXS_SESSION *session);
@@ -233,8 +233,7 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
  *
  * @return The instance data for this new instance
  */
-static  MXS_ROUTER  *
+static MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
-createInstance(SERVICE *service, char **options)
 {
     ROUTER_INSTANCE *inst;
     uuid_t defuuid;
@@ -322,8 +321,6 @@ createInstance(SERVICE *service, char **options)
     strcpy(inst->binlog_name, "");
     strcpy(inst->prevbinlog, "");
 
-    MXS_CONFIG_PARAMETER *params = service->svc_config_param;
-
     inst->initbinlog = config_get_integer(params, "file");
 
     inst->short_burst = config_get_integer(params, "shortburst");

server/modules/routing/cat/cat.cc

@@ -25,7 +25,7 @@ Cat::~Cat()
 {
 }
 
-Cat* Cat::create(SERVICE* pService, char** pzOptions)
+Cat* Cat::create(SERVICE* pService, MXS_CONFIG_PARAMETER* params)
 {
     return new Cat(pService);
 }

server/modules/routing/cat/cat.hh

@@ -25,7 +25,7 @@ class Cat: public mxs::Router<Cat, CatSession>
     Cat& operator =(const Cat&) = delete;
 public:
     ~Cat();
-    static Cat* create(SERVICE* pService, char** pzOptions);
+    static Cat* create(SERVICE* pService, MXS_CONFIG_PARAMETER* params);
     CatSession* newSession(MXS_SESSION* pSession);
     void diagnostics(DCB* pDcb);
     json_t* diagnostics_json() const;

server/modules/routing/cli/cli.cc

@@ -43,7 +43,7 @@
 #include <maxscale/log_manager.h>
 
 /* The router entry points */
-static  MXS_ROUTER *createInstance(SERVICE *service, char **options);
+static  MXS_ROUTER *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static  MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
 static  void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
 static  void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
@@ -116,11 +116,9 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
  *
  * @return The instance data for this new instance
  */
-static  MXS_ROUTER  *
+static MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
-createInstance(SERVICE *service, char **options)
 {
     CLI_INSTANCE    *inst;
-    int     i;
 
     if ((inst = static_cast<CLI_INSTANCE*>(MXS_MALLOC(sizeof(CLI_INSTANCE)))) == NULL)
     {
@@ -131,14 +129,6 @@ createInstance(SERVICE *service, char **options)
     spinlock_init(&inst->lock);
     inst->sessions = NULL;
 
-    if (options)
-    {
-        for (i = 0; options[i]; i++)
-        {
-            MXS_ERROR("Unknown option for CLI '%s'", options[i]);
-        }
-    }
-
     /*
      * We have completed the creation of the instance data, so now
      * insert this router instance into the linked list of routers

server/modules/routing/debugcli/debugcli.cc

@@ -42,7 +42,7 @@
 #include <maxscale/log_manager.h>
 
 /* The router entry points */
-static  MXS_ROUTER *createInstance(SERVICE *service, char **options);
+static  MXS_ROUTER *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static  MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
 static  void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
 static  void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
@@ -115,11 +115,9 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
  *
  * @return The instance data for this new instance
  */
-static  MXS_ROUTER  *
+static MXS_ROUTER* createInstance(SERVICE* service, MXS_CONFIG_PARAMETER* params)
-createInstance(SERVICE *service, char **options)
 {
     CLI_INSTANCE    *inst;
-    int     i;
 
     if ((inst = static_cast<CLI_INSTANCE*>(MXS_MALLOC(sizeof(CLI_INSTANCE)))) == NULL)
     {

server/modules/routing/hintrouter/hintrouter.cc

@@ -54,11 +54,10 @@ HintRouter::HintRouter(SERVICE* pService, HINT_TYPE default_action, string& defa
 }
 
 //static
-HintRouter* HintRouter::create(SERVICE* pService, char** pzOptions)
+HintRouter* HintRouter::create(SERVICE* pService, MXS_CONFIG_PARAMETER* params)
 {
     HR_ENTRY();
 
-    MXS_CONFIG_PARAMETER* params = pService->svc_config_param;
     HINT_TYPE default_action = (HINT_TYPE)config_get_enum(params, DEFAULT_ACTION,
                                                           default_action_values);
     string default_server(config_get_string(params, DEFAULT_SERVER));

server/modules/routing/hintrouter/hintrouter.hh

@@ -20,7 +20,7 @@
 class HintRouter : public maxscale::Router<HintRouter, HintRouterSession>
 {
 public:
-    static HintRouter* create(SERVICE* pService, char** pzOptions);
+    static HintRouter* create(SERVICE* pService, MXS_CONFIG_PARAMETER* params);
     HintRouterSession* newSession(MXS_SESSION *pSession);
     void diagnostics(DCB* pOut);
     json_t* diagnostics_json() const;

server/modules/routing/maxinfo/maxinfo.cc

@@ -66,7 +66,7 @@ static int handle_url(INFO_INSTANCE *instance, INFO_SESSION *router_session, GWB
 static int maxinfo_send_ok(DCB *dcb);
 
 /* The router entry points */
-static  MXS_ROUTER *createInstance(SERVICE *service, char **options);
+static  MXS_ROUTER *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static  MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
 static  void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
 static  void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
@@ -143,8 +143,7 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
  *
  * @return The instance data for this new instance
  */
-static  MXS_ROUTER  *
+static MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
-createInstance(SERVICE *service, char **options)
 {
     INFO_INSTANCE *inst;
     int i;
@@ -158,14 +157,6 @@ createInstance(SERVICE *service, char **options)
     inst->service = service;
     spinlock_init(&inst->lock);
 
-    if (options)
-    {
-        for (i = 0; options[i]; i++)
-        {
-            MXS_ERROR("Unknown option for MaxInfo '%s'", options[i]);
-        }
-    }
-
     /*
      * We have completed the creation of the instance data, so now
      * insert this router instance into the linked list of routers

server/modules/routing/readconnroute/readconnroute.cc

@@ -91,7 +91,7 @@
 #include <maxscale/utils.hh>
 
 /* The router entry points */
-static MXS_ROUTER *createInstance(SERVICE *service, char **options);
+static MXS_ROUTER *createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params);
 static MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
 static void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
 static void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
@@ -234,7 +234,7 @@ static bool configureInstance(MXS_ROUTER* instance, MXS_CONFIG_PARAMETER* params
  *
  * @return The instance data for this new instance
  */
-static MXS_ROUTER* createInstance(SERVICE *service, char **options)
+static MXS_ROUTER* createInstance(SERVICE *service, MXS_CONFIG_PARAMETER* params)
 {
     ROUTER_INSTANCE* inst = static_cast<ROUTER_INSTANCE*>(MXS_CALLOC(1, sizeof(ROUTER_INSTANCE)));
 
@@ -245,7 +245,7 @@ static MXS_ROUTER* createInstance(SERVICE *service, char **options)
         spinlock_init(&inst->lock);
         inst->bitmask_and_bitvalue = 0;
 
-        if (!configureInstance((MXS_ROUTER*)inst, service->svc_config_param))
+        if (!configureInstance((MXS_ROUTER*)inst, params))
         {
             free_readconn_instance(inst);
             inst = nullptr;

server/modules/routing/readwritesplit/readwritesplit.cc

@@ -273,13 +273,11 @@ bool RWSplit::have_enough_servers() const
  */
 
 
-RWSplit* RWSplit::create(SERVICE *service, char **options)
+RWSplit* RWSplit::create(SERVICE *service, MXS_CONFIG_PARAMETER* params)
 {
-    MXS_CONFIG_PARAMETER* params = service->svc_config_param;
     SConfig config(new Config(params));
 
-    if (!handle_max_slaves(config, config_get_string(params, "max_slave_connections")) ||
+    if (!handle_max_slaves(config, config_get_string(params, "max_slave_connections")))
-        (options && !rwsplit_process_router_options(config, options)))
     {
         return NULL;
     }

server/modules/routing/readwritesplit/readwritesplit.hh

@@ -256,7 +256,7 @@ public:
      *
      * @return New router instance or NULL on error
      */
-    static RWSplit* create(SERVICE* pService, char** pzOptions);
+    static RWSplit* create(SERVICE* pService, MXS_CONFIG_PARAMETER* params);
 
     /**
      * @brief Create a new session for this router instance

server/modules/routing/schemarouter/schemarouterinstance.cc

@@ -54,18 +54,16 @@ SchemaRouter::~SchemaRouter()
 {
 }
 
-SchemaRouter* SchemaRouter::create(SERVICE* pService, char** pzOptions)
+SchemaRouter* SchemaRouter::create(SERVICE* pService, MXS_CONFIG_PARAMETER* params)
 {
-    MXS_CONFIG_PARAMETER* conf = pService->svc_config_param;
+    if ((config_get_param(params, "auth_all_servers")) == NULL)
-
-    if ((config_get_param(conf, "auth_all_servers")) == NULL)
     {
         MXS_NOTICE("Authentication data is fetched from all servers. To disable this "
                    "add 'auth_all_servers=0' to the service.");
         pService->users_from_all = true;
     }
 
-    SConfig config(new Config(pService->svc_config_param));
+    SConfig config(new Config(params));
     return new SchemaRouter(pService, config);
 }
 

server/modules/routing/schemarouter/schemarouterinstance.hh

@@ -34,7 +34,7 @@ class SchemaRouter: public mxs::Router<SchemaRouter, SchemaRouterSession>
 {
 public:
     ~SchemaRouter();
-    static SchemaRouter* create(SERVICE* pService, char** pzOptions);
+    static SchemaRouter* create(SERVICE* pService, MXS_CONFIG_PARAMETER* params);
     SchemaRouterSession* newSession(MXS_SESSION* pSession);
     void diagnostics(DCB* pDcb);
     json_t* diagnostics_json() const;