store: Let the JSON formatter know about arrays at top level.

[sysdb.git] / src / core / plugin.c

diff --git a/src/core/plugin.c b/src/core/plugin.c
index 919df2b3c982fed934b0495849817936907d9253..79df55e589ee967a4cf9e4819d4cada6c29dfae0 100644 (file)
--- a/src/core/plugin.c
+++ b/src/core/plugin.c
@@ -118,6 +118,7 @@ static sdb_llist_t      *collector_list = NULL;
 static sdb_llist_t      *cname_list = NULL;
 static sdb_llist_t      *shutdown_list = NULL;
 static sdb_llist_t      *log_list = NULL;
+static sdb_llist_t      *ts_fetcher_list = NULL;
 
 static struct {
        const char   *type;
@@ -786,6 +787,14 @@ sdb_plugin_register_collector(const char *name, sdb_plugin_collector_cb callback
        return 0;
 } /* sdb_plugin_register_collector */
 
+int
+sdb_plugin_register_ts_fetcher(const char *name,
+               sdb_plugin_fetch_ts_cb callback, sdb_object_t *user_data)
+{
+       return plugin_add_callback(&ts_fetcher_list, "time-series fetcher",
+                       name, callback, user_data);
+} /* sdb_plugin_register_ts_fetcher */
+
 sdb_plugin_ctx_t
 sdb_plugin_get_ctx(void)
 {
@@ -1201,5 +1210,33 @@ sdb_plugin_logf(int prio, const char *fmt, ...)
        return ret;
 } /* sdb_plugin_logf */
 
+sdb_timeseries_t *
+sdb_plugin_fetch_timeseries(const char *type, const char *id,
+               sdb_timeseries_opts_t *opts)
+{
+       sdb_plugin_cb_t *plugin;
+       sdb_plugin_fetch_ts_cb callback;
+       sdb_timeseries_t *ts;
+
+       ctx_t *old_ctx;
+
+       if ((! type) || (! id) || (! opts))
+               return NULL;
+
+       plugin = SDB_PLUGIN_CB(sdb_llist_search_by_name(ts_fetcher_list, type));
+       if (! plugin) {
+               sdb_log(SDB_LOG_ERR, "core: Cannot fetch time-series of type %s: "
+                               "no such plugin loaded", type);
+               errno = ENOENT;
+               return NULL;
+       }
+
+       old_ctx = ctx_set(plugin->cb_ctx);
+       callback = (sdb_plugin_fetch_ts_cb)plugin->cb_callback;
+       ts = callback(id, opts, plugin->cb_user_data);
+       ctx_set(old_ctx);
+       return ts;
+} /* sdb_plugin_fetch_timeseries */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */