Tree wide: Use user_data_t compound literal where appropriate.

[collectd.git] / src / write_redis.c

diff --git a/src/write_redis.c b/src/write_redis.c
index 5560b4d..def3d9c 100644 (file)
--- a/src/write_redis.c
+++ b/src/write_redis.c
@@ -25,11 +25,10 @@
  **/
 
 #include "collectd.h"
+
 #include "plugin.h"
 #include "common.h"
-#include "configfile.h"
 
-#include <pthread.h>
 #include <sys/time.h>
 #include <hiredis/hiredis.h>
 
@@ -46,6 +45,8 @@ struct wr_node_s
   struct timeval timeout;
   char *prefix;
   int database;
+  int max_set_size;
+  _Bool store_rates;
 
   redisContext *conn;
   pthread_mutex_t lock;
@@ -62,7 +63,7 @@ static int wr_write (const data_set_t *ds, /* {{{ */
   wr_node_t *node = ud->data;
   char ident[512];
   char key[512];
-  char value[512];
+  char value[512] = { 0 };
   char time[24];
   size_t value_size;
   char *value_ptr;
@@ -77,14 +78,14 @@ static int wr_write (const data_set_t *ds, /* {{{ */
       ident);
   ssnprintf (time, sizeof (time), "%.9f", CDTIME_T_TO_DOUBLE(vl->time));
 
-  memset (value, 0, sizeof (value));
   value_size = sizeof (value);
   value_ptr = &value[0];
-  status = format_values (value_ptr, value_size, ds, vl, /* store rates = */ 0);
-  pthread_mutex_lock (&node->lock);
+  status = format_values (value_ptr, value_size, ds, vl, node->store_rates);
   if (status != 0)
     return (status);
 
+  pthread_mutex_lock (&node->lock);
+
   if (node->conn == NULL)
   {
     node->conn = redisConnectWithTimeout ((char *)node->host, node->port, node->timeout);
@@ -105,7 +106,7 @@ static int wr_write (const data_set_t *ds, /* {{{ */
       pthread_mutex_unlock (&node->lock);
       return (-1);
     }
-   
+
     rr = redisCommand(node->conn, "SELECT %d", node->database);
     if (rr == NULL)
       WARNING("SELECT command error. database:%d message:%s", node->database, node->conn->errstr);
@@ -119,6 +120,15 @@ static int wr_write (const data_set_t *ds, /* {{{ */
   else
     freeReplyObject (rr);
 
+  if (node->max_set_size >= 0)
+  {
+    rr = redisCommand (node->conn, "ZREMRANGEBYRANK %s %d %d", key, 0, (-1 * node->max_set_size) - 1);
+    if (rr == NULL)
+      WARNING("ZREMRANGEBYRANK command error. key:%s message:%s", key, node->conn->errstr);
+    else
+      freeReplyObject (rr);
+  }
+
   /* TODO(octo): This is more overhead than necessary. Use the cache and
    * metadata to determine if it is a new metric and call SADD only once for
    * each metric. */
@@ -157,12 +167,10 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
   wr_node_t *node;
   int timeout;
   int status;
-  int i;
 
-  node = malloc (sizeof (*node));
+  node = calloc (1, sizeof (*node));
   if (node == NULL)
     return (ENOMEM);
-  memset (node, 0, sizeof (*node));
   node->host = NULL;
   node->port = 0;
   node->timeout.tv_sec = 0;
@@ -170,6 +178,8 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
   node->conn = NULL;
   node->prefix = NULL;
   node->database = 0;
+  node->max_set_size = -1;
+  node->store_rates = 1;
   pthread_mutex_init (&node->lock, /* attr = */ NULL);
 
   status = cf_util_get_string_buffer (ci, node->name, sizeof (node->name));
@@ -179,7 +189,7 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
     return (status);
   }
 
-  for (i = 0; i < ci->children_num; i++)
+  for (int i = 0; i < ci->children_num; i++)
   {
     oconfig_item_t *child = ci->children + i;
 
@@ -204,6 +214,12 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
     else if (strcasecmp ("Database", child->key) == 0) {
       status = cf_util_get_int (child, &node->database);
     }
+    else if (strcasecmp ("MaxSetSize", child->key) == 0) {
+      status = cf_util_get_int (child, &node->max_set_size);
+    }
+    else if (strcasecmp ("StoreRates", child->key) == 0) {
+      status = cf_util_get_boolean (child, &node->store_rates);
+    }
     else
       WARNING ("write_redis plugin: Ignoring unknown config option \"%s\".",
           child->key);
@@ -215,14 +231,14 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
   if (status == 0)
   {
     char cb_name[DATA_MAX_NAME_LEN];
-    user_data_t ud;
 
     ssnprintf (cb_name, sizeof (cb_name), "write_redis/%s", node->name);
 
-    ud.data = node;
-    ud.free_func = wr_config_free;
-
-    status = plugin_register_write (cb_name, wr_write, &ud);
+    status = plugin_register_write (cb_name, wr_write,
+        &(user_data_t) {
+          .data = node,
+          .free_func = wr_config_free,
+        });
   }
 
   if (status != 0)
@@ -233,9 +249,7 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
 
 static int wr_config (oconfig_item_t *ci) /* {{{ */
 {
-  int i;
-
-  for (i = 0; i < ci->children_num; i++)
+  for (int i = 0; i < ci->children_num; i++)
   {
     oconfig_item_t *child = ci->children + i;