More missing kstat usages

[collectd.git] / src / write_redis.c

diff --git a/src/write_redis.c b/src/write_redis.c
index b4c5e21..fa58ad2 100644 (file)
--- a/src/write_redis.c
+++ b/src/write_redis.c
@@ -1,6 +1,6 @@
 /**
  * collectd - src/write_redis.c
- * Copyright (C) 2010       Florian Forster
+ * Copyright (C) 2010-2015  Florian Forster
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -33,6 +33,10 @@
 #include <sys/time.h>
 #include <hiredis/hiredis.h>
 
+#ifndef REDIS_DEFAULT_PREFIX
+# define REDIS_DEFAULT_PREFIX "collectd/"
+#endif
+
 struct wr_node_s
 {
   char name[DATA_MAX_NAME_LEN];
@@ -40,6 +44,7 @@ struct wr_node_s
   char *host;
   int port;
   struct timeval timeout;
+  char *prefix;
 
   redisContext *conn;
   pthread_mutex_t lock;
@@ -67,7 +72,9 @@ static int wr_write (const data_set_t *ds, /* {{{ */
   status = FORMAT_VL (ident, sizeof (ident), vl);
   if (status != 0)
     return (status);
-  ssnprintf (key, sizeof (key), "collectd/%s", ident);
+  ssnprintf (key, sizeof (key), "%s%s",
+      (node->prefix != NULL) ? node->prefix : REDIS_DEFAULT_PREFIX,
+      ident);
   ssnprintf (time, sizeof (time), "%.9f", CDTIME_T_TO_DOUBLE(vl->time));
 
   memset (value, 0, sizeof (value));
@@ -95,7 +102,7 @@ static int wr_write (const data_set_t *ds, /* {{{ */
     if (ds->ds[i].type == DS_TYPE_COUNTER)
       APPEND ("%llu", vl->values[i].counter);
     else if (ds->ds[i].type == DS_TYPE_GAUGE)
-      APPEND ("%g", vl->values[i].gauge);
+      APPEND (GAUGE_FORMAT, vl->values[i].gauge);
     else if (ds->ds[i].type == DS_TYPE_DERIVE)
       APPEND ("%"PRIi64, vl->values[i].derive);
     else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
@@ -106,29 +113,49 @@ static int wr_write (const data_set_t *ds, /* {{{ */
 
 #undef APPEND
 
+  status = format_values (value_ptr, value_size, ds, vl, /* store rates = */ 0);
   pthread_mutex_lock (&node->lock);
+  if (status != 0)
+    return (status);
 
   if (node->conn == NULL)
   {
     node->conn = redisConnectWithTimeout ((char *)node->host, node->port, node->timeout);
     if (node->conn == NULL)
     {
-      ERROR ("write_redis plugin: Connecting to host \"%s\" (port %i) failed.",
+      ERROR ("write_redis plugin: Connecting to host \"%s\" (port %i) failed: Unkown reason",
           (node->host != NULL) ? node->host : "localhost",
           (node->port != 0) ? node->port : 6379);
       pthread_mutex_unlock (&node->lock);
       return (-1);
     }
+    else if (node->conn->err)
+    {
+      ERROR ("write_redis plugin: Connecting to host \"%s\" (port %i) failed: %s",
+          (node->host != NULL) ? node->host : "localhost",
+          (node->port != 0) ? node->port : 6379,
+          node->conn->errstr);
+      pthread_mutex_unlock (&node->lock);
+      return (-1);
+    }
   }
 
-  assert (node->conn != NULL);
   rr = redisCommand (node->conn, "ZADD %s %s %s", key, time, value);
+  if (rr == NULL)
+    WARNING("ZADD 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. */
+  rr = redisCommand (node->conn, "SADD %svalues %s",
+      (node->prefix != NULL) ? node->prefix : REDIS_DEFAULT_PREFIX,
+      ident);
   if (rr==NULL)
-    WARNING("ZADD command error. key:%s", key);
-
-  rr = redisCommand (node->conn, "SADD collectd/values %s", ident);
-  if (rr==NULL)
-    WARNING("SADD command error. ident:%s", ident);
+    WARNING("SADD command error. ident:%s message:%s", ident, node->conn->errstr);
+  else
+    freeReplyObject (rr);
 
   pthread_mutex_unlock (&node->lock);
 
@@ -168,6 +195,7 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
   node->timeout.tv_sec = 0;
   node->timeout.tv_usec = 1000;
   node->conn = NULL;
+  node->prefix = NULL;
   pthread_mutex_init (&node->lock, /* attr = */ NULL);
 
   status = cf_util_get_string_buffer (ci, node->name, sizeof (node->name));
@@ -196,6 +224,9 @@ static int wr_config_node (oconfig_item_t *ci) /* {{{ */
       status = cf_util_get_int (child, &timeout);
       if (status == 0) node->timeout.tv_usec = timeout;
     }
+    else if (strcasecmp ("Prefix", child->key) == 0) {
+      status = cf_util_get_string (child, &node->prefix);
+    }
     else
       WARNING ("write_redis plugin: Ignoring unknown config option \"%s\".",
           child->key);