Use router template in schemarouter

The schemarouter now uses the router template.

server/modules/routing/schemarouter/schemarouterinstance.hh

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2019-07-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#pragma once
+
+#include "schemarouter.hh"
+
+#include <set>
+#include <string>
+
+#include <maxscale/router.hh>
+#include <maxscale/pcre2.h>
+
+#include "schemaroutersession.hh"
+
+using std::string;
+using std::set;
+
+class SchemaRouterSession;
+
+/**
+ * The per instance data for the router.
+ */
+class SchemaRouter: public mxs::Router<SchemaRouter, SchemaRouterSession>
+{
+public:
+    ~SchemaRouter();
+    static SchemaRouter* create(SERVICE* pService, char** pzOptions);
+    SchemaRouterSession* newSession(MXS_SESSION* pSession);
+    void diagnostics(DCB* pDcb);
+    uint64_t getCapabilities();
+
+protected:
+    friend class SchemaRouterSession;
+    schemarouter_config_t schemarouter_config;  /*< expanded config info from SERVICE */
+
+    ShardManager          shard_manager;        /*< Shard maps hashed by user name */
+    SERVICE*              service;              /*< Pointer to service                 */
+    SPINLOCK              lock;                 /*< Lock for the instance data         */
+    int                   schemarouter_version; /*< version number for router's config */
+    ROUTER_STATS          stats;                /*< Statistics for this router         */
+    set<string>           ignored_dbs;          /*< List of databases to ignore when the
+                                                 * database mapping finds multiple servers
+                                                 * with the same database */
+    pcre2_code*           ignore_regex;         /*< Databases matching this regex will
+                                                 * not cause the session to be terminated
+                                                 * if they are found on more than one server. */
+    pcre2_match_data*     ignore_match_data;
+
+    SchemaRouter(SERVICE *service, char **options);
+};