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/* Copyright (C) 2006 MySQL AB
This program 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 of the License.
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 St, Fifth Floor, Boston, MA 02110-1301 USA */
#include <sql_priv.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h> // localtime_r
#include <mysql_version.h>
#include <mysql/plugin.h>
#include <my_global.h>
#include <my_dir.h>
#include "my_pthread.h" // pthread_handler_t
#include "my_sys.h" // my_write, my_malloc
#include "m_string.h" // strlen
#include "sql_plugin.h" // st_plugin_int
/*
Disable __attribute__() on non-gcc compilers.
*/
#if !defined(__attribute__) && !defined(__GNUC__)
#define __attribute__(A)
#endif
#define HEART_STRING_BUFFER 100
struct mysql_heartbeat_context
{
pthread_t heartbeat_thread;
File heartbeat_file;
};
pthread_handler_t mysql_heartbeat(void *p)
{
DBUG_ENTER("mysql_heartbeat");
struct mysql_heartbeat_context *con= (struct mysql_heartbeat_context *)p;
char buffer[HEART_STRING_BUFFER];
unsigned int x= 0;
time_t result;
struct tm tm_tmp;
while(1)
{
sleep(5);
result= time(NULL);
localtime_r(&result, &tm_tmp);
my_snprintf(buffer, sizeof(buffer),
"Heartbeat at %02d%02d%02d %2d:%02d:%02d\n",
tm_tmp.tm_year % 100,
tm_tmp.tm_mon+1,
tm_tmp.tm_mday,
tm_tmp.tm_hour,
tm_tmp.tm_min,
tm_tmp.tm_sec);
my_write(con->heartbeat_file, (uchar*) buffer, strlen(buffer), MYF(0));
x++;
}
DBUG_RETURN(0);
}
/*
Initialize the daemon example at server start or plugin installation.
SYNOPSIS
daemon_example_plugin_init()
DESCRIPTION
Starts up heartbeatbeat thread
RETURN VALUE
0 success
1 failure (cannot happen)
*/
static int daemon_example_plugin_init(void *p)
{
DBUG_ENTER("daemon_example_plugin_init");
struct mysql_heartbeat_context *con;
pthread_attr_t attr; /* Thread attributes */
char heartbeat_filename[FN_REFLEN];
char buffer[HEART_STRING_BUFFER];
time_t result= time(NULL);
struct tm tm_tmp;
struct st_plugin_int *plugin= (struct st_plugin_int *)p;
con= (struct mysql_heartbeat_context *)
my_malloc(sizeof(struct mysql_heartbeat_context), MYF(0));
fn_format(heartbeat_filename, "mysql-heartbeat", "", ".log",
MY_REPLACE_EXT | MY_UNPACK_FILENAME);
unlink(heartbeat_filename);
con->heartbeat_file= my_open(heartbeat_filename, O_CREAT|O_RDWR, MYF(0));
/*
No threads exist at this point in time, so this is thread safe.
*/
localtime_r(&result, &tm_tmp);
my_snprintf(buffer, sizeof(buffer),
"Starting up at %02d%02d%02d %2d:%02d:%02d\n",
tm_tmp.tm_year % 100,
tm_tmp.tm_mon+1,
tm_tmp.tm_mday,
tm_tmp.tm_hour,
tm_tmp.tm_min,
tm_tmp.tm_sec);
my_write(con->heartbeat_file, (uchar*) buffer, strlen(buffer), MYF(0));
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr,
PTHREAD_CREATE_JOINABLE);
/* now create the thread */
if (pthread_create(&con->heartbeat_thread, &attr, mysql_heartbeat,
(void *)con) != 0)
{
fprintf(stderr,"Could not create heartbeat thread!\n");
exit(0);
}
plugin->data= (void *)con;
DBUG_RETURN(0);
}
/*
Terminate the daemon example at server shutdown or plugin deinstallation.
SYNOPSIS
daemon_example_plugin_deinit()
Does nothing.
RETURN VALUE
0 success
1 failure (cannot happen)
*/
static int daemon_example_plugin_deinit(void *p)
{
DBUG_ENTER("daemon_example_plugin_deinit");
char buffer[HEART_STRING_BUFFER];
struct st_plugin_int *plugin= (struct st_plugin_int *)p;
struct mysql_heartbeat_context *con=
(struct mysql_heartbeat_context *)plugin->data;
time_t result= time(NULL);
struct tm tm_tmp;
pthread_cancel(con->heartbeat_thread);
localtime_r(&result, &tm_tmp);
my_snprintf(buffer, sizeof(buffer),
"Shutting down at %02d%02d%02d %2d:%02d:%02d\n",
tm_tmp.tm_year % 100,
tm_tmp.tm_mon+1,
tm_tmp.tm_mday,
tm_tmp.tm_hour,
tm_tmp.tm_min,
tm_tmp.tm_sec);
my_write(con->heartbeat_file, (uchar*) buffer, strlen(buffer), MYF(0));
my_close(con->heartbeat_file, MYF(0));
my_free((char *)con, MYF(0));
DBUG_RETURN(0);
}
struct st_mysql_daemon daemon_example_plugin=
{ MYSQL_DAEMON_INTERFACE_VERSION };
/*
Plugin library descriptor
*/
mysql_declare_plugin(daemon_example)
{
MYSQL_DAEMON_PLUGIN,
&daemon_example_plugin,
"daemon_example",
"Brian Aker",
"Daemon example, creates a heartbeat beat file in mysql-heartbeat.log",
PLUGIN_LICENSE_GPL,
daemon_example_plugin_init, /* Plugin Init */
daemon_example_plugin_deinit, /* Plugin Deinit */
0x0100 /* 1.0 */,
NULL, /* status variables */
NULL, /* system variables */
NULL /* config options */
}
mysql_declare_plugin_end;
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