write_redis plugin: Add all identifiers to a "set".

This should make it easy for front-ends to discover available metrics.

diff --git a/src/write_redis.c b/src/write_redis.c
index c995a90..58f2cae 100644 (file)
--- a/src/write_redis.c
+++ b/src/write_redis.c
@@ -53,6 +53,7 @@ static int wr_write (const data_set_t *ds, /* {{{ */
     user_data_t *ud)
 {
   wr_node_t *node = ud->data;
+  char ident[512];
   char key[512];
   char value[512];
   size_t value_size;
@@ -60,10 +61,10 @@ static int wr_write (const data_set_t *ds, /* {{{ */
   int status;
   int i;
 
-  status = FORMAT_VL (value, sizeof (value), vl);
+  status = FORMAT_VL (ident, sizeof (ident), vl);
   if (status != 0)
     return (status);
-  ssnprintf (key, sizeof (key), "collectd/%s", value);
+  ssnprintf (key, sizeof (key), "collectd/%s", ident);
 
   memset (value, 0, sizeof (value));
   value_size = sizeof (value);
@@ -120,6 +121,8 @@ static int wr_write (const data_set_t *ds, /* {{{ */
   assert (node->conn != NULL);
   status = credis_zadd (node->conn, key, (double) vl->time, value);
 
+  credis_sadd (node->conn, "collectd/values", ident);
+
   pthread_mutex_unlock (&node->lock);
 
   return (0);