// AddMeta adds a metadata entry to memory, which is queued for later sending.
func AddMeta(metric string, tags opentsdb.TagSet, name string, value interface{}, setHost bool) {
if tags == nil {
tags = make(opentsdb.TagSet)
}
if _, present := tags["host"]; setHost && !present {
tags["host"] = util.Hostname
}
if err := tags.Clean(); err != nil {
slog.Error(err)
return
}
ts := tags.Tags()
metalock.Lock()
defer metalock.Unlock()
prev, present := metadata[Metakey{metric, ts, name}]
if present && !reflect.DeepEqual(prev, value) {
slog.Infof("metadata changed for %s/%s/%s: %v to %v", metric, ts, name, prev, value)
go sendMetadata([]Metasend{{
Metric: metric,
Tags: tags,
Name: name,
Value: value,
}})
} else if metadebug {
slog.Infof("AddMeta for %s/%s/%s: %v", metric, ts, name, value)
}
metadata[Metakey{metric, ts, name}] = value
}
func tagMetaKey(tags opentsdb.TagSet, name string) string {
return fmt.Sprintf("tmeta:%s:%s", tags.Tags(), name)
}
