func Dial(sock mangos.Socket, url string) error {
if err := sock.Dial(url); err != nil {
s := fmt.Sprintf("socket.Dial: %s", err)
return errors.New(s)
}
return nil
}
func recvName(sock mangos.Socket, name string) {
var msg []byte
var err error
if msg, err = sock.Recv(); err == nil {
fmt.Printf("%s: RECEIVED: \"%s\"\n", name, string(msg))
}
}
func Send(sock mangos.Socket, msg []byte) error {
if err := sock.Send(msg); err != nil {
s := fmt.Sprintf("socket.Send: %s", err)
return errors.New(s)
}
return nil
}
func Listen(sock mangos.Socket, url string) error {
if err := sock.Listen(url); err != nil {
s := fmt.Sprintf("socket.Listen: %s", err)
return errors.New(s)
}
return nil
}
func send(socket mangos.Socket, message string) {
log.Printf("Node %s sends %s\n", node, message)
err := socket.Send([]byte(message))
if err != nil {
log.Fatalf("Node %s failed to send '%s': %s\n", node, message, err.Error())
}
}
func replyLoop(sock mangos.Socket) {
if sendData == nil {
fatalf("No data to send!")
}
for {
msg, err := sock.RecvMsg()
switch err {
case mangos.ErrRecvTimeout:
return
case nil:
default:
fatalf("RecvMsg failed: %v", err)
}
printMsg(msg)
msg.Free()
msg = mangos.NewMessage(len(sendData))
msg.Body = append(msg.Body, sendData...)
err = sock.SendMsg(msg)
if err != nil {
fatalf("SendMsg failed: %v", err)
}
}
}
func (t *inprocTran) NewListener(addr string, sock mangos.Socket) (mangos.PipeListener, error) {
if _, err := mangos.StripScheme(t, addr); err != nil {
return nil, err
}
l := &listener{addr: addr, proto: sock.GetProtocol()}
return l, nil
}
func publishEvt(channel mangos.Socket, evt string) error {
if err := channel.Send([]byte(evt)); err != nil {
log.Debugf("fail to publish '%v' event:%v\n", evt, err)
return err
}
return nil
}
func Receive(sock mangos.Socket) (msg []byte, err error) {
msg, err = sock.Recv()
if err != nil {
s := fmt.Sprintf("socket.Recv: %s", err)
return nil, errors.New(s)
}
return msg, nil
}
func sendRecv(sock mangos.Socket, name string) {
for {
sock.SetOption(mangos.OptionRecvDeadline, 100*time.Millisecond)
recvName(sock, name)
time.Sleep(time.Second)
sendName(sock, name)
}
}
func getEvt(channel mangos.Socket) (string, error) {
log.Debug("getEvt()")
evt, err := channel.Recv()
if err != nil {
return "", err
}
return string(evt), nil
}
func receive(socket mangos.Socket) string {
bytes, err := socket.Recv()
if err != nil {
log.Fatalf("Node %s failed receiving a message: %s\n", node, err.Error())
}
message := string(bytes)
log.Printf("Node %s received %s\n", node, message)
return message
}
func client(url string, name string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = respondent.NewSocket(); err != nil {
die("can't get new respondent socket: %s", err.Error())
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on respondent socket: %s", err.Error())
}
for {
if msg, err = sock.Recv(); err != nil {
die("Cannot recv: %s", err.Error())
}
fmt.Printf("CLIENT(%s): RECEIVED \"%s\" SURVEY REQUEST\n",
name, string(msg))
d := date()
fmt.Printf("CLIENT(%s): SENDING DATE SURVEY RESPONSE\n", name)
if err = sock.Send([]byte(d)); err != nil {
die("Cannot send: %s", err.Error())
}
}
}
func node0(url string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = rep.NewSocket(); err != nil {
die("can't get new rep socket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(url); err != nil {
die("can't listen on rep socket: %s", err.Error())
}
for {
// Could also use sock.RecvMsg to get header
msg, err = sock.Recv()
if string(msg) == "DATE" { // no need to terminate
fmt.Println("NODE0: RECEIVED DATE REQUEST")
d := date()
fmt.Printf("NODE0: SENDING DATE %s\n", d)
err = sock.Send([]byte(d))
if err != nil {
die("can't send reply: %s", err.Error())
}
}
}
}
func client(url string, name string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = sub.NewSocket(); err != nil {
die("can't get new sub socket: %s", err.Error())
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on sub socket: %s", err.Error())
}
// Empty byte array effectively subscribes to everything
err = sock.SetOption(mangos.OptionSubscribe, []byte(""))
if err != nil {
die("cannot subscribe: %s", err.Error())
}
for {
if msg, err = sock.Recv(); err != nil {
die("Cannot recv: %s", err.Error())
}
fmt.Printf("CLIENT(%s): RECEIVED %s\n", name, string(msg))
}
}
func (t wsTran) NewListener(addr string, sock mangos.Socket) (mangos.PipeListener, error) {
proto := sock.GetProtocol()
l, e := t.listener(addr, proto)
if e == nil {
if v, e := sock.GetOption(mangos.OptionMaxRecvSize); e == nil {
l.maxrx = v.(int)
}
l.mux.Handle(l.url.Path, l)
}
return l, e
}
func node0(url string) {
var sock mangos.Socket
var err error
if sock, err = pair.NewSocket(); err != nil {
die("can't get new pair socket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(url); err != nil {
die("can't listen on pair socket: %s", err.Error())
}
sendRecv(sock, "node0")
}
func (wsTran) NewDialer(addr string, sock mangos.Socket) (mangos.PipeDialer, error) {
iswss := strings.HasPrefix(addr, "wss://")
opts := make(map[string]interface{})
opts[mangos.OptionNoDelay] = true
opts[mangos.OptionKeepAlive] = true
proto := sock.GetProtocol()
maxrx := 0
if v, e := sock.GetOption(mangos.OptionMaxRecvSize); e == nil {
maxrx = v.(int)
}
return &dialer{addr: addr, proto: proto, iswss: iswss, opts: opts, maxrx: maxrx}, nil
}
func recvLoop(sock mangos.Socket) {
for {
msg, err := sock.RecvMsg()
switch err {
case mangos.ErrProtoState:
return
case mangos.ErrRecvTimeout:
return
case nil:
default:
fatalf("RecvMsg failed: %v", err)
}
printMsg(msg)
msg.Free()
}
}
func simpleSend(t *testing.T, tx mangos.Socket, wg *sync.WaitGroup) {
var buf [256]byte
i := 0
for i = 0; i < 10000; i++ {
l := rand.Intn(255) + 1
buf[0] = uint8(l)
if e := tx.Send(buf[:l]); e != nil {
t.Fatalf("Send: %v", e)
break
}
}
t.Logf("Sent %d Msgs", i)
if e := tx.Close(); e != nil {
t.Fatalf("Tx Close: %v", e)
}
wg.Done()
}
func server(url string, nworkers int) {
var sock mangos.Socket
var err error
var wg sync.WaitGroup
rand.Seed(time.Now().UnixNano())
if sock, err = rep.NewSocket(); err != nil {
die("can't get new rep socket: %s", err)
}
if err = sock.SetOption(mangos.OptionRaw, true); err != nil {
die("can't set raw mode: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(url); err != nil {
die("can't listen on rep socket: %s", err.Error())
}
wg.Add(nworkers)
fmt.Printf("Starting %d workers\n", nworkers)
for id := 0; id < nworkers; id++ {
go func(id int) {
defer wg.Done()
serverWorker(sock, id)
}(id)
}
wg.Wait()
}
func runCmdServer(channel mangos.Socket, done <-chan struct{}) (<-chan messages.Message, error) {
cmdChan := make(chan messages.Message)
go func() {
for {
// Could also use sock.RecvMsg to get header
log.Debug("sensor: cmd server - waiting for a command...")
select {
case <-done:
log.Debug("sensor: cmd server - done...")
return
default:
if rawCmd, err := channel.Recv(); err != nil {
switch err {
case mangos.ErrRecvTimeout:
log.Debug("sensor: cmd server - timeout... ok")
default:
log.Debugln("sensor: cmd server - error =>", err)
}
} else {
log.Debug("sensor: cmd server - got a command => ", string(rawCmd))
if cmd, err := messages.Decode(rawCmd); err != nil {
log.Println(err)
} else {
cmdChan <- cmd
}
//for now just ack the command and process the command asynchronously
//NOTE:
//must reply before receiving the next message
//otherwise nanomsg/mangos will be confused :-)
monitorFinishReply := "ok"
err = channel.Send([]byte(monitorFinishReply))
if err != nil {
log.Warnln("sensor: cmd server - fail to send monitor.finish reply =>", err)
}
}
}
}
}()
return cmdChan, nil
}
func sendCmd(channel mangos.Socket, cmd messages.Message) (string, error) {
sendTimeouts := 0
recvTimeouts := 0
log.Debugf("sendCmd(%s)\n", cmd)
for {
sendData, err := messages.Encode(cmd)
if err != nil {
log.Info("sendCmd(): malformed cmd - ", err)
return "", err
}
if err := channel.Send(sendData); err != nil {
switch err {
case mangos.ErrSendTimeout:
log.Info("sendCmd(): send timeout...")
sendTimeouts++
if sendTimeouts > 3 {
return "", err
}
default:
return "", err
}
}
response, err := channel.Recv()
if err != nil {
switch err {
case mangos.ErrRecvTimeout:
log.Info("sendCmd(): receive timeout...")
recvTimeouts++
if recvTimeouts > 3 {
return "", err
}
default:
return "", err
}
}
return string(response), nil
}
}
func sendLoop(sock mangos.Socket) {
if sendData == nil {
fatalf("No data to send!")
}
for {
msg := mangos.NewMessage(len(sendData))
msg.Body = append(msg.Body, sendData...)
err := sock.SendMsg(msg)
if err != nil {
fatalf("SendMsg failed: %v", err)
}
if sendInterval >= 0 {
time.Sleep(time.Duration(sendInterval) * time.Second)
} else {
break
}
}
}
func node1(url string, msg string) {
var sock mangos.Socket
var err error
if sock, err = push.NewSocket(); err != nil {
die("can't get new push socket: %s", err.Error())
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on push socket: %s", err.Error())
}
fmt.Printf("NODE1: SENDING \"%s\"\n", msg)
if err = sock.Send([]byte(msg)); err != nil {
die("can't send message on push socket: %s", err.Error())
}
sock.Close()
}
func serverWorker(sock mangos.Socket, id int) {
var err error
delay := rand.Intn(int(time.Second))
for {
var m *mangos.Message
if m, err = sock.RecvMsg(); err != nil {
return
}
m.Body = make([]byte, 4)
time.Sleep(time.Duration(delay))
binary.BigEndian.PutUint32(m.Body[0:], uint32(id))
if err = sock.SendMsg(m); err != nil {
return
}
}
}
func sendRequest(s mangos.Socket, request request) (*response, error) {
requestJSON, err := json.Marshal(request)
if err != nil {
// This is not recoverable.
panic(err)
}
if err := s.Send(requestJSON); err != nil {
return nil, err
}
rep, err := s.Recv()
if err != nil {
return nil, err
}
var resp response
if err := json.Unmarshal(rep, &resp); err != nil {
return nil, err
}
return &resp, nil
}
func sendCmd(channel mangos.Socket, cmd string) (string, error) {
sendTimeouts := 0
recvTimeouts := 0
log.Debugf("sendCmd(%s)\n", cmd)
for {
if err := channel.Send([]byte(cmd)); err != nil {
switch err {
case mangos.ErrSendTimeout:
log.Info("sendCmd(): send timeout...")
sendTimeouts++
if sendTimeouts > 3 {
return "", err
}
default:
return "", err
}
}
response, err := channel.Recv()
if err != nil {
switch err {
case mangos.ErrRecvTimeout:
log.Info("sendCmd(): receive timeout...")
recvTimeouts++
if recvTimeouts > 3 {
return "", err
}
default:
return "", err
}
}
return string(response), nil
}
}
func simpleRecv(t *testing.T, rx mangos.Socket, wg *sync.WaitGroup) {
i := 0
for i = 0; i < 10000; i++ {
buf, e := rx.Recv()
if e != nil {
t.Fatalf("Recv: %v", e)
break
}
if len(buf) < 1 {
t.Fatalf("Recv: empty buf")
break
}
if len(buf) != int(buf[0]) {
t.Fatalf("Recv: length %d != expected %d",
len(buf), buf[0])
break
}
}
t.Logf("Recvd %d Msgs", i)
if e := rx.Close(); e != nil {
t.Fatalf("Rx Close: %v", e)
}
wg.Done()
}
func node0(url string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = pull.NewSocket(); err != nil {
die("can't get new pull socket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(url); err != nil {
die("can't listen on pull socket: %s", err.Error())
}
for {
// Could also use sock.RecvMsg to get header
msg, err = sock.Recv()
fmt.Printf("NODE0: RECEIVED \"%s\"\n", msg)
}
}