MXS-1775 Cleanup monitor class headers

- All classes now declared in separate header file
- Header files have .hh-suffix

server/modules/monitor/ndbclustermon/ndbclustermon.hh

@@ -0,0 +1,52 @@
+#pragma once
+/*
+ * 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: 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 <maxscale/monitor.hh>
+#include <maxscale/thread.h>
+
+/**
+ * @file ndbcclustermon.hh A NDBC cluster monitor
+ */
+
+class NDBCMonitor : public MXS_MONITOR_INSTANCE
+{
+public:
+    NDBCMonitor(const NDBCMonitor&) = delete;
+    NDBCMonitor& operator = (const NDBCMonitor&) = delete;
+
+    static NDBCMonitor* create(MXS_MONITOR* monitor);
+    void destroy();
+    bool start(const MXS_CONFIG_PARAMETER* param);
+    void stop();
+    void diagnostics(DCB* dcb) const;
+    json_t* diagnostics_json() const;
+
+private:
+    THREAD m_thread;                /**< Monitor thread */
+    unsigned long m_id;             /**< Monitor ID */
+    uint64_t m_events;              /**< enabled events */
+    int m_shutdown;                 /**< Flag to shutdown the monitor thread */
+    int m_status;                   /**< Monitor status */
+    MXS_MONITORED_SERVER *m_master; /**< Master server for MySQL Master/Slave replication */
+    char* m_script;                 /**< Script to call when state changes occur on servers */
+    MXS_MONITOR* m_monitor;         /**< Pointer to generic monitor structure */
+    bool m_checked;                 /**< Whether server access has been checked */
+
+    NDBCMonitor(MXS_MONITOR* monitor);
+    ~NDBCMonitor();
+
+    void main();
+    static void main(void* data);
+};