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 StartNanomsgJsonServer(port string) {
var server mangos.Socket
var err error
if server, err = rep.NewSocket(); err != nil {
log.Fatal(err)
}
server.AddTransport(tcp.NewTransport())
server.Listen("tcp://0.0.0.0:" + port)
for {
msg, _ := server.Recv()
var body Request
var response []byte
json.Unmarshal(msg, &body)
if response, err = json.Marshal(Response{Method: body.Method, PayloadLength: len(body.Payload)}); err != nil {
log.Fatal(err)
}
server.Send(response)
}
}
func recv_name(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 sendRequest(s mangos.Socket, request request) (*response, error) {
fmt.Println("Sending a request")
requestJSON, err := json.Marshal(request)
if err != nil {
// This is not recoverable.
panic(err)
}
fmt.Printf("sendRequest: %s\n", requestJSON)
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 StartNanomsgJsonTest(address string, clients int, requestsPerClient int, messageSize int, timer metrics.Timer, requestSize *int) func(wg *sync.WaitGroup) {
return func(wg *sync.WaitGroup) {
var socket mangos.Socket
var err error
if socket, err = req.NewSocket(); err != nil {
log.Fatal(err)
}
defer socket.Close()
defer wg.Done()
socket.AddTransport(tcp.NewTransport())
if err = socket.Dial("tcp://" + address); err != nil {
log.Fatal(err)
}
request, _ := json.Marshal(Request{Method: "TEST", Payload: strings.Repeat("a", messageSize)})
*requestSize = len(request)
for i := 0; i < requestsPerClient; i++ {
timer.Time(func() {
if err = socket.Send(request); err != nil {
log.Fatal(err)
}
socket.Recv()
})
}
}
}
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 server(url string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = surveyor.NewSocket(); err != nil {
die("can't get new surveyor socket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(url); err != nil {
die("can't listen on surveyor socket: %s", err.Error())
}
err = sock.SetOption(mangos.OptionSurveyTime, time.Second*2)
if err != nil {
die("SetOption(): %s", err.Error())
}
for {
fmt.Println("SERVER: SENDING DATE SURVEY REQUEST")
if err = sock.Send([]byte("DATE")); err != nil {
die("Failed sending survey: %s", err.Error())
}
for {
if msg, err = sock.Recv(); err != nil {
break
}
fmt.Printf("SERVER: RECEIVED \"%s\" SURVEY RESPONSE\n",
string(msg))
}
}
}
func recv(s mangos.Socket, obj interface{}) error {
data, err := s.Recv()
if err != nil {
return stackerr.Wrap(err)
}
return stackerr.Wrap(json.Unmarshal(data, obj))
}
func StartNanomsgProtoServer(port string) {
var server mangos.Socket
var err error
if server, err = rep.NewSocket(); err != nil {
log.Fatal(err)
}
server.AddTransport(tcp.NewTransport())
server.Listen("tcp://0.0.0.0:" + port)
for {
msg, _ := server.Recv()
var body pb.Request
proto.Unmarshal(msg, &body)
data, _ := proto.Marshal(&pb.Response{
Method: body.Method,
PayloadLength: int64(len(body.Payload)),
})
server.Send(data)
}
}
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 main() {
flag.Parse()
var sock mangos.Socket
var err error
if sock, err = pub.NewSocket(); err != nil {
die("can't get new pub socket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen("tcp://127.0.0.1:55555"); err != nil {
die("can't listen on pub socket: %s", err.Error())
}
//sub
var subscriber mangos.Socket
if subscriber, err = sub.NewSocket(); err != nil {
die("can't get new sub socket: %s", err.Error())
}
subscriber.AddTransport(ipc.NewTransport())
subscriber.AddTransport(tcp.NewTransport())
if err = subscriber.Dial("tcp://127.0.0.1:55555"); err != nil {
die("can't dial on sub socket: %s", err.Error())
}
// Empty byte array effectively subscribes to everything
err = subscriber.SetOption(mangos.OptionSubscribe, []byte(""))
start := time.Now()
//var msg []byte
for i := 1; i <= *numbPtr; i++ {
//conn.Publish("test", []byte(randSeq(320)))
sock.Send([]byte(randSeq(320)))
if _, err = subscriber.Recv(); err != nil {
die("Cannot recv: %s", err.Error())
}
//log.Println(string(msg))
/*
runtime.Gosched()
atomic.AddUint64(&ops, 1)
if ops == uint64(*numbPtr) {
elapsed := time.Since(start)
log.Printf("Time took %s", elapsed)
}
*/
}
elapsed := time.Since(start)
log.Printf("Time took %s", elapsed)
defer sock.Close()
fmt.Scanln()
}
func getEvt(channel mangos.Socket) (string, error) {
log.Println("getEvt()")
evt, err := channel.Recv()
if err != nil {
return "", err
}
return string(evt), nil
}
func startNode(masterHost, name string) {
var sock mangos.Socket
var err error
var msg []byte
masterUrl := url.URL{Scheme: "tcp", Host: masterHost}
ip := getPrivateIP()
// Try to get new "respondent" socket
if sock, err = respondent.NewSocket(); err != nil {
utils.Die("Can't get new respondent socket: %s", err.Error())
}
defer sock.Close()
sock.AddTransport(tcp.NewTransport())
// Connect to master
if err = sock.Dial(masterUrl.String()); err != nil {
utils.Die("Can't dial on respondent socket: %s", err.Error())
}
// Wait for a survey request and send responses
for {
if msg, err = sock.Recv(); err != nil {
utils.Die("Cannot recv: %s", err.Error())
}
fmt.Printf("Client(%s): Received \"%s\" survey request\n", name, string(msg))
var loadAvg *load.LoadAvgStat
if loadAvg, err = load.LoadAvg(); err != nil {
utils.Die("Cannot get load average: %s", err.Error())
}
var cpuInfo []cpu.CPUInfoStat
if cpuInfo, err = cpu.CPUInfo(); err != nil {
utils.Die("Cannot get CPU info: %s", err.Error())
}
fmt.Printf("CPU INFO len: %d\n", len(cpuInfo))
// Get the normalized CPU load
avg := loadAvg.Load1
cores := int32(0)
for _, info := range cpuInfo {
fmt.Printf("Inner Cores: %d\n", info.Cores)
cores += info.Cores
}
fmt.Printf("Load avg: %f\n", avg)
fmt.Printf("Cores: %d\n", cores)
avg = avg / float64(cores)
fmt.Printf("Client(%s): Sending survey response\n", name)
if err = sock.Send([]byte(fmt.Sprintf("%s,%f", ip, avg))); err != nil {
utils.Die("Cannot send: %s", err.Error())
}
}
}
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)
}
}
func (receiver *SPReceiver) Receive(address string) error {
var sock mangos.Socket
var err error
if sock, err = rep.NewSocket(); err != nil {
return err
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err := sock.Listen(address); err != nil {
return err
}
for {
if _, err := sock.Recv(); err != nil {
return err
}
}
return nil
}
func node(args []string) {
var sock mangos.Socket
var err error
var msg []byte
var x int
if sock, err = bus.NewSocket(); err != nil {
die("bus.NewSocket: %s", err)
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Listen(args[2]); err != nil {
die("sock.Listen: %s", err.Error())
}
// wait for everyone to start listening
time.Sleep(time.Second)
for x = 3; x < len(args); x++ {
if err = sock.Dial(args[x]); err != nil {
die("socket.Dial: %s", err.Error())
}
}
// wait for everyone to join
time.Sleep(time.Second)
fmt.Printf("%s: SENDING '%s' ONTO BUS\n", args[1], args[1])
if err = sock.Send([]byte(args[1])); err != nil {
die("sock.Send: %s", err.Error())
}
for {
if msg, err = sock.Recv(); err != nil {
die("sock.Recv: %s", err.Error())
}
fmt.Printf("%s: RECEIVED \"%s\" FROM BUS\n", args[1],
string(msg))
}
}
func runCmdServer(channel mangos.Socket, done <-chan struct{}) (<-chan string, error) {
cmdChan := make(chan string)
go func() {
for {
// Could also use sock.RecvMsg to get header
log.Println("alauncher: cmd server - waiting for a command...")
select {
case <-done:
log.Println("alauncher: cmd server - done...")
return
default:
if rawCmd, err := channel.Recv(); err != nil {
switch err {
case mangos.ErrRecvTimeout:
log.Println("alauncher: cmd server - timeout... ok")
default:
log.Println("alauncher: cmd server - error =>", err)
}
} else {
cmd := string(rawCmd)
log.Println("alauncher: cmd server - got a command =>", cmd)
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.Println("alauncher: cmd server - fail to send monitor.finish reply =>", err)
}
}
}
}
}()
return cmdChan, nil
}
func node1(url string) {
var sock mangos.Socket
var err error
var msg []byte
if sock, err = req.NewSocket(); err != nil {
die("can't get new req socket: %s", err.Error())
}
sock.AddTransport(ipc.NewTransport())
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on req socket: %s", err.Error())
}
fmt.Printf("NODE1: SENDING DATE REQUEST %s\n", "DATE")
if err = sock.Send([]byte("DATE")); err != nil {
die("can't send message on push socket: %s", err.Error())
}
if msg, err = sock.Recv(); err != nil {
die("can't receive date: %s", err.Error())
}
fmt.Printf("NODE1: RECEIVED DATE %s\n", string(msg))
sock.Close()
}
func sendCmd(channel mangos.Socket, cmd string) (string, error) {
sendTimeouts := 0
recvTimeouts := 0
log.Printf("sendCmd(%s)\n", cmd)
for {
if err := channel.Send([]byte(cmd)); err != nil {
switch err {
case mangos.ErrSendTimeout:
log.Println("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.Println("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 (m *Master) queryWorkers(c chan<- float64) {
var (
err error
sock mangos.Socket
)
// Try to get new "surveyor" socket
if sock, err = surveyor.NewSocket(); err != nil {
utils.Die("Can't get new surveyor socket: %s", err)
}
defer sock.Close()
sock.AddTransport(tcp.NewTransport())
// Begin listening on the URL
if err = sock.Listen(m.url.String()); err != nil {
utils.Die("Can't listen on surveyor socket: %s", err.Error())
}
// Set "deadline" for the survey and a timeout for receiving responses
if err = sock.SetOption(mangos.OptionSurveyTime, m.surveyDeadline); err != nil {
utils.Die("SetOption(mangos.OptionSurveyTime): %s", err.Error())
}
if err = sock.SetOption(mangos.OptionRecvDeadline, m.surveyDeadline+(1*time.Second)); err != nil {
utils.Die("SetOption(mangos.OptionRecvDeadline): %s", err.Error())
}
for {
fmt.Println("Sending master request")
if err = sock.Send([]byte("CPU")); err != nil {
utils.Die("Failed sending survey: %s", err.Error())
}
loadAvgs := []float64{}
for {
var msg []byte
if msg, err = sock.Recv(); err != nil {
break
}
parts := strings.Split(string(msg), ",")
if len(parts) != 2 {
continue
}
ip := parts[0]
loadAvgString := parts[1]
// Find the corresponding droplet
var worker *Worker
for _, w := range m.workers {
if w.privateAddr == ip {
worker = w
break
}
}
if worker == nil {
fmt.Printf("Message received from unknown worker '%s'. Skipping...\n", ip)
continue
}
var loadAvg float64
if loadAvg, err = strconv.ParseFloat(string(loadAvgString), 64); err != nil {
utils.Die("ParseFloat(): %s", err.Error())
}
// Set their load average and append this worker's load average to the list
worker.loadAvg = loadAvg
loadAvgs = append(loadAvgs, loadAvg)
}
// Compute the average loadAvg
var loadAvg float64
for _, avg := range loadAvgs {
loadAvg += avg
}
loadAvg /= float64(len(loadAvgs))
// Send the load averages
if !math.IsNaN(loadAvg) {
c <- loadAvg
}
// Wait
time.Sleep(m.queryInterval)
}
}