1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/* Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights
reserved.
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 02110-1335 USA */
#include <my_global.h>
#include <sql_priv.h>
#include <stdlib.h>
#include <ctype.h>
#include <mysql_version.h>
#include <mysql/plugin.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];
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));
}
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 __attribute__ ((unused)))
{
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(PSI_NOT_INSTRUMENTED, 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");
DBUG_RETURN(1);
}
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 __attribute__ ((unused)))
{
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);
pthread_join(con->heartbeat_thread, NULL);
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));
/*
Need to wait for the hearbeat thread to terminate before closing
the file it writes to and freeing the memory it uses.
*/
pthread_join(con->heartbeat_thread, NULL);
my_close(con->heartbeat_file, MYF(0));
my_free(con);
DBUG_RETURN(0);
}
struct st_mysql_daemon daemon_example_plugin=
{ MYSQL_DAEMON_INTERFACE_VERSION };
/*
Plugin library descriptor
*/
maria_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 */
"1.0", /* string version */
MariaDB_PLUGIN_MATURITY_EXPERIMENTAL /* maturity */
}
maria_declare_plugin_end;
|
