// watcher for data change in etcd directory
func (ns *numbers) watcher() {
client := ns.client_pool.Get().(*etcd.Client)
defer func() {
ns.client_pool.Put(client)
}()
for {
ch := make(chan *etcd.Response, 10)
go func() {
for {
if resp, ok := <-ch; ok {
if !resp.Node.Dir {
ns.parse(resp.Node.Key, resp.Node.Value)
log.Trace("csv change:", resp.Node.Key)
}
} else {
return
}
}
}()
_, err := client.Watch(DEFAULT_NUMBERS_PATH, 0, true, ch, nil)
if err != nil {
log.Critical(err)
}
<-time.After(RETRY_DELAY)
}
}
// load all csv(s) from a given directory in etcd
func (ns *numbers) load(directory string) {
client := ns.client_pool.Get().(*etcd.Client)
defer func() {
ns.client_pool.Put(client)
}()
// get the keys under directory
log.Info("loading numbers from:", directory)
resp, err := client.Get(directory, true, false)
if err != nil {
log.Error(err)
return
}
// validation check
if !resp.Node.Dir {
log.Error("not a directory")
return
}
// read all csv(s) from this dirctory
ns.tables = make(map[string]*table)
count := 0
for _, node := range resp.Node.Nodes {
if !node.Dir {
log.Trace("loading:", node.Key)
ns.parse(node.Key, node.Value)
count++
} else {
log.Warning("not a file:", node.Key)
}
}
log.Finef("%v csv(s) loaded", count)
}