func (c *Client) DialHost(id string) (Host, error) {
// TODO: reuse connection if leader id == id
services := c.service.Select(map[string]string{"id": id})
if len(services) == 0 {
return nil, ErrNoServers
}
rc, err := rpcplus.DialHTTPPath("tcp", services[0].Addr, rpcplus.DefaultRPCPath, c.dial)
return newHostClient(c.service, rc, c.dial), err
}
func (c *Client) followLeader(firstErr chan<- error) {
for update := range c.service.Leaders() {
if update == nil {
if firstErr != nil {
firstErr <- ErrNoServers
c.Close()
return
}
continue
}
c.mtx.Lock()
if c.c != nil {
c.c.Close()
c.c = nil
}
c.leaderID = update.Attrs["id"]
if c.leaderID != c.selfID {
c.err = Attempts.Run(func() (err error) {
c.c, err = rpcplus.DialHTTPPath("tcp", update.Addr, rpcplus.DefaultRPCPath, c.dial)
return
})
}
if c.err == nil {
close(c.leaderChange)
c.leaderChange = make(chan struct{})
}
c.mtx.Unlock()
if firstErr != nil {
firstErr <- c.err
if c.err != nil {
c.c = nil
c.Close()
return
}
firstErr = nil
}
}
// TODO: reconnect to discoverd here
}