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Initial implementation of the monitor modules and a simple mysql monitor to set

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server up or down automatically.
This commit is contained in:
Mark Riddoch
2013-07-08 18:55:43 +02:00
parent 902e059342
commit 46f6d27b0b
15 changed files with 632 additions and 1 deletions
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#ifndef _MONITOR_H
#define _MONITOR_H
/*
* This file is distributed as part of the SkySQL Gateway. It is free
* software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation,
* version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright SkySQL Ab 2013
*/
#include <server.h>
/**
* @file monitor.h The interface to the monitor module
*
* @verbatim
* Revision History
*
* Date Who Description
* 07/07/13 Mark Riddoch Initial implementation
*
* @endverbatim
*/
/**
* The "Module Object" for a monitor module.
*
* The monitor modules are designed to monitor the backend databases that the gateway
* connects to and provide information regarding the status of the databases that
* is used in the routing decisions.
*
* startMonitor is called to start the monitoring process, it is called on the main
* thread of the gateway and is responsible for creating a thread for the monitor
* itself to run on. This should use the entry points defined in the thread.h
* header file rather than make direct calls to the operating system thrading libraries.
* The return from startMonitor is a void * handle that will be passed to all other monitor
* API calls.
*
* stopMonitor is responsible for shuting down and destroying a monitor, it is called
* with the void * handle that was returned by startMonitor.
*
* registerServer is called to register a server that must be monitored with a running
* monitor. this will be called with the handle returned from the startMonitor call and
* the SERVER structure that the monitor must update and monitor. The SERVER structure
* contains the information required to connect to the monitored server.
*
* unregisterServer is called to remove a server from the set of servers that need to be
* monitored.
*/
typedef struct {
void *(*startMonitor)();
void (*stopMonitor)(void *);
void (*registerServer)(void *, SERVER *);
void (*unregisterServer)(void *, SERVER *);
} MONITOR_OBJECT;
/**
* Representation of the running monitor.
*/
typedef struct monitor {
char *name; /**< The name of the monitor module */
MONITOR_OBJECT *module; /**< The "monitor object" */
void *handle; /**< Handle returned from startMonitor */
struct monitor *next; /**< Next monitor in the linked list */
} MONITOR;
extern MONITOR *monitor_alloc(char *, char *);
extern void monitor_free(MONITOR *);
extern void monitorAddServer(MONITOR *, SERVER *);
#endif