// RegisterTmp create a ephemeral node, and watch it, if node droped then send a SIGQUIT to self.
func RegisterTemp(conn *zk.Conn, fpath string, data []byte) error {
tpath, err := conn.Create(path.Join(fpath)+"/", data, zk.FlagEphemeral|zk.FlagSequence, zk.WorldACL(zk.PermAll))
if err != nil {
log.Error("conn.Create(\"%s\", \"%s\", zk.FlagEphemeral|zk.FlagSequence) error(%v)", fpath, string(data), err)
return err
}
log.Debug("create a zookeeper node:%s", tpath)
// watch self
go func() {
for {
log.Info("zk path: \"%s\" set a watch", tpath)
exist, _, watch, err := conn.ExistsW(tpath)
if err != nil {
log.Error("zk.ExistsW(\"%s\") error(%v)", tpath, err)
log.Warn("zk path: \"%s\" set watch failed, kill itself", tpath)
killSelf()
return
}
if !exist {
log.Warn("zk path: \"%s\" not exist, kill itself", tpath)
killSelf()
return
}
event := <-watch
log.Info("zk path: \"%s\" receive a event %v", tpath, event)
}
}()
return nil
}
func pipe(dst net.Conn, src net.Conn, copiedBytes chan int64) {
n, err := io.Copy(dst, src)
if err != nil {
log.Warn("copy [%s] to [%s] error:%v", src.RemoteAddr().String(), dst.RemoteAddr().String(), err)
}
err = src.Close()
if err != nil {
log.Warn("close [%s] error:%v", src.RemoteAddr().String(), err)
}
copiedBytes <- n
}
// Create create zookeeper path, if path exists ignore error
func Create(conn *zk.Conn, fpath string) error {
// create zk root path
tpath := ""
for _, str := range strings.Split(fpath, "/")[1:] {
tpath = path.Join(tpath, "/", str)
log.Debug("create zookeeper path: \"%s\"", tpath)
_, err := conn.Create(tpath, []byte(""), 0, zk.WorldACL(zk.PermAll))
if err != nil {
if err == zk.ErrNodeExists {
log.Warn("zk.create(\"%s\") exists", tpath)
} else {
log.Error("zk.create(\"%s\") error(%v)", tpath, err)
return err
}
}
}
return nil
}