Added `Handler_*' support to the `mysql' plugin

The `mysql' plugin now ignores all counter that are set to zero..

diff --git a/src/mysql.c b/src/mysql.c
index e83c544..42429e9 100644 (file)
--- a/src/mysql.c
+++ b/src/mysql.c
@@ -47,6 +47,7 @@ static char *db = NULL;
 static char  init_suceeded = 0;
 
 static char *commands_file = "mysql/mysql_commands-%s.rrd";
+static char *handler_file = "mysql/mysql_handler-%s.rrd";
 static char *traffic_file  = "traffic-mysql.rrd";
 
 static char *commands_ds_def[] =
@@ -56,6 +57,13 @@ static char *commands_ds_def[] =
 };
 static int commands_ds_num = 1;
 
+static char *handler_ds_def[] =
+{
+       "DS:value:COUNTER:25:0:U",
+       NULL
+};
+static int handler_ds_num = 1;
+
 static char *traffic_ds_def[] =
 {
        "DS:incoming:COUNTER:25:0:U",
@@ -155,6 +163,16 @@ static void commands_write (char *host, char *inst, char *val)
        rrd_update_file (host, buf, val, commands_ds_def, commands_ds_num);
 }
 
+static void handler_write (char *host, char *inst, char *val)
+{
+       char buf[BUFSIZE];
+
+       if (snprintf (buf, BUFSIZE, handler_file, inst) >= BUFSIZE)
+               return;
+
+       rrd_update_file (host, buf, val, handler_ds_def, handler_ds_num);
+}
+
 static void traffic_write (char *host, char *inst, char *val)
 {
        rrd_update_file (host, traffic_file, val, traffic_ds_def, traffic_ds_num);
@@ -182,6 +200,27 @@ static void commands_submit (char *inst, unsigned long long value)
        plugin_submit ("mysql_commands", inst, buf);
 }
 
+static void handler_submit (char *inst, unsigned long long value)
+{
+       char buf[BUFSIZE];
+       int  status;
+
+       status = snprintf (buf, BUFSIZE, "%u:%llu", (unsigned int) curtime, value);
+
+       if (status < 0)
+       {
+               syslog (LOG_ERR, "snprintf failed");
+               return;
+       }
+       else if (status >= BUFSIZE)
+       {
+               syslog (LOG_WARNING, "snprintf was truncated");
+               return;
+       }
+
+       plugin_submit ("mysql_handler", inst, buf);
+}
+
 static void traffic_submit (unsigned long long incoming,
                unsigned long long outgoing)
 {
@@ -248,12 +287,19 @@ static void mysql_read (void)
                key = row[0];
                val = atoll (row[1]);
 
+               if (val == 0ULL)
+                       continue;
+
                if (strncmp (key, "Com_", 4) == 0)
                {
                        /* Ignore `prepared statements' */
                        if (strncmp (key, "Com_stmt_", 9) != 0)
                                commands_submit (key + 4, val);
                }
+               else if (strncmp (key, "Handler_", 8) == 0)
+               {
+                       handler_submit (key + 8, val);
+               }
                else if (strncmp (key, "Bytes_", 6) == 0)
                {
                        if (strcmp (key, "Bytes_received") == 0)
@@ -278,6 +324,7 @@ void module_register (void)
 {
        plugin_register (MODULE_NAME, init, mysql_read, NULL);
        plugin_register ("mysql_commands", NULL, NULL, commands_write);
+       plugin_register ("mysql_handler", NULL, NULL, handler_write);
        plugin_register ("mysql_traffic", NULL, NULL, traffic_write);
        cf_register (MODULE_NAME, config, config_keys, config_keys_num);
 }