MXS-1703: Move additional classes to separate file

Also use stl containers in monitor definition.

server/modules/monitor/mariadbmon/utilities.hh

@@ -0,0 +1,127 @@
+#pragma once
+
+/*
+ * Copyright (c) 2018 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: 2020-01-01
+ *
+ * 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.
+ */
+
+#include <maxscale/cppdefs.hh>
+#include <string>
+
+using std::string;
+
+enum mysql_server_version
+{
+    MYSQL_SERVER_VERSION_100,
+    MYSQL_SERVER_VERSION_55,
+    MYSQL_SERVER_VERSION_51
+};
+
+class Gtid
+{
+public:
+    uint32_t domain;
+    int64_t server_id; // Is actually 32bit unsigned. 0 is only used by server versions  <= 10.1
+    uint64_t sequence;
+    Gtid();
+
+    /**
+     * Parse a Gtid-triplet from a string. In case of a multi-triplet value, only the triplet with
+     * the given domain is returned.
+     *
+     * @param str Gtid string
+     * @param search_domain The Gtid domain whose triplet should be returned. Negative domain stands for
+     * autoselect, which is only allowed when the string contains one triplet.
+     */
+    Gtid(const char* str, int64_t search_domain = -1);
+
+    bool operator == (const Gtid& rhs) const;
+
+    string to_string() const;
+private:
+    void parse_triplet(const char* str);
+};
+
+// Contains data returned by one row of SHOW ALL SLAVES STATUS
+class SlaveStatusInfo
+{
+public:
+    int64_t master_server_id;       /**< The master's server_id value. Valid ids are 32bit unsigned. -1 is
+                                     *   unread/error. */
+    string master_host;             /**< Master server host name. */
+    int master_port;                /**< Master server port. */
+    bool slave_io_running;          /**< Whether the slave I/O thread is running and connected. */
+    bool slave_sql_running;         /**< Whether or not the SQL thread is running. */
+    string master_log_file;         /**< Name of the master binary log file that the I/O thread is currently
+                                     *   reading from. */
+    uint64_t read_master_log_pos;   /**< Position up to which the I/O thread has read in the current master
+                                     *   binary log file. */
+    Gtid gtid_io_pos;               /**< Gtid I/O position of the slave thread. Only shows the triplet with
+                                     *   the current master domain. */
+    string last_error;              /**< Last IO or SQL error encountered. */
+
+    SlaveStatusInfo();
+};
+
+// This class groups some miscellaneous replication related settings together.
+class ReplicationSettings
+{
+public:
+    bool gtid_strict_mode;      /**< Enable additional checks for replication */
+    bool log_bin;               /**< Is binary logging enabled */
+    bool log_slave_updates;     /**< Does the slave log replicated events to binlog */
+    ReplicationSettings()
+        : gtid_strict_mode(false)
+        , log_bin(false)
+        , log_slave_updates(false)
+    {}
+};
+
+/**
+ * Monitor specific information about a server
+ *
+ * Note: These are initialized in @c init_server_info
+ */
+class MySqlServerInfo
+{
+public:
+    int64_t          server_id;             /**< Value of @@server_id. Valid values are 32bit unsigned. */
+    int              group;                 /**< Multi-master group where this server belongs,
+                                             *   0 for servers not in groups */
+    bool             read_only;             /**< Value of @@read_only */
+    bool             slave_configured;      /**< Whether SHOW SLAVE STATUS returned rows */
+    bool             binlog_relay;          /** Server is a Binlog Relay */
+    int              n_slaves_configured;   /**< Number of configured slave connections*/
+    int              n_slaves_running;      /**< Number of running slave connections */
+    int              slave_heartbeats;      /**< Number of received heartbeats */
+    double           heartbeat_period;      /**< The time interval between heartbeats */
+    time_t           latest_event;          /**< Time when latest event was received from the master */
+    int64_t          gtid_domain_id;        /**< The value of gtid_domain_id, the domain which is used for
+                                             *   new non-replicated events. */
+    Gtid             gtid_current_pos;      /**< Gtid of latest event. Only shows the triplet
+                                             *   with the current master domain. */
+    Gtid             gtid_binlog_pos;       /**< Gtid of latest event written to binlog. Only shows
+                                             *   the triplet with the current master domain. */
+    SlaveStatusInfo  slave_status;          /**< Data returned from SHOW SLAVE STATUS */
+    ReplicationSettings rpl_settings;       /**< Miscellaneous replication related settings */
+    mysql_server_version version;           /**< Server version, 10.X, 5.5 or 5.1 */
+
+    MySqlServerInfo();
+
+    /**
+     * Calculate how many events are left in the relay log. If gtid_current_pos is ahead of Gtid_IO_Pos,
+     * or a server_id is unknown, an error value is returned.
+     *
+     * @return Number of events in relay log according to latest queried info. A negative value signifies
+     * an error in the gtid-values.
+     */
+    int64_t relay_log_events();
+};