func recv(c chan string, socket *zmq.Socket) {
for {
msg, _ := socket.Recv(0)
fmt.Println("Pulled msg: ", string(msg))
c <- string(msg)
}
}
func zmqReceiver(s *zmq.Socket, c chan []map[string]interface{}, wg *sync.WaitGroup) {
defer wg.Done()
for {
buf, err := s.Recv(0)
if err != nil {
log.Println("zmq.Socket.Recv():", err)
continue
}
var m []map[string]interface{}
err = json.Unmarshal(buf, &m)
if err != nil {
log.Println("json.Unmarshal():", err)
continue
}
if !check(m) {
log.Println("Invalid Command:", m)
continue
}
select {
case toDeliver := <-c:
toDeliver = append(toDeliver, m...)
c <- toDeliver
default:
c <- m
}
}
}
func runZmqStream() {
var context zmq.Context
var socket zmq.Socket
// connect to zmq
var err error
if context, err = zmq.NewContext(); err != nil {
panic("No ZMQ Context?")
}
defer context.Close()
if socket, err = context.NewSocket(zmq.SUB); err != nil {
panic("No ZMQ Socket Outbound??")
}
defer socket.Close()
socket.Connect("tcp://localhost:5558")
socket.SetSockOptString(zmq.SUBSCRIBE, "")
for {
// block here, waiting for inbound requests
msg, _ := socket.Recv(0)
if len(msg) > 0 {
parts := strings.Split(string(msg), "\n\n")
process(parts[0])
}
}
}
func send_and_recieve(socket zmq.Socket, in_msg []byte, id string) (res []byte, err error) {
// println("in_msg: ", string (in_msg))
// println("send ", id)
var repeat bool
var r0 []byte
var err0 error
repeat = true
for repeat {
socket.Send(in_msg, 0)
// println("ok")
r0, err0 = socket.Recv(0)
if r0 != nil && len(r0) == 3 {
// это указание повторить запрос еще раз
repeat = true
time.Sleep(1e6)
} else {
repeat = false
}
}
// println("recv ", id)
// println("out_msg: ", string (r0))
return r0, err0
}
// send a message to the zmq REQ socket
func sendMessage(reqsocket zmq.Socket, m Message) {
var address = PUB_KEY + "." + m.Nick
b, _ := json.Marshal(m)
var content = b
env := envelope{address, string(content)}
e, _ := json.Marshal(env)
reqsocket.Send([]byte(e), 0)
// wait for a reply
reqsocket.Recv(0)
}
func receiveZmqMessage(subsocket zmq.Socket, m *Message) error {
// using zmq multi-part messages which will arrive
// in pairs. the first of which we don't care about so we discard.
address, _ := subsocket.Recv(0)
content, _ := subsocket.Recv(0)
if startswith(string(address), PUB_KEY) {
// it's one that we sent out, so ignore it
return errors.New("do not echo my own messages")
}
return json.Unmarshal([]byte(content), m)
}
// The main announcer loop. Receives incoming messages, spits them back out to
// any connected subscribers.
func announcerLoop(listener *gozmq.Socket, sender *gozmq.Socket) {
for {
// This blocks until something comes down the pipe.
msg, listenRecvError := listener.Recv(0)
if listenRecvError != nil {
errorHandler("listenRecvError", listenRecvError.Error())
}
sender.Send(msg, 0)
}
}
func bind_to_channel(sock zmq.Socket) (channel chan []byte) {
channel = make(chan []byte)
go func() {
for {
msg, err := sock.Recv(0)
if err != nil {
fmt.Println("[ERROR] die at sock.Recv:", err.Error())
break
}
channel <- msg
}
}()
return
}
/* handling Read/Push/Delete tasks diversion based on task-type */
func goShareZmqRep(socket *zmq.Socket) {
var err_response string
for {
msg, _ := socket.Recv(0)
message_array := strings.Fields(string(msg))
response_bytes, axn_status := DBTasks(message_array)
if axn_status {
socket.Send([]byte(response_bytes), 0)
} else {
err_response = fmt.Sprintf("Error for request sent: %s", msg)
socket.Send([]byte(err_response), 0)
}
}
}
func (t *TransportZmq) processControlIn(bridge_out *zmq.Socket) (ok bool) {
var err error
RetryControl:
msg, err := bridge_out.Recv(zmq.DONTWAIT)
if err != nil {
switch err {
case syscall.EINTR:
// Try again
goto RetryControl
case syscall.EAGAIN:
// Poll lied, poll again
return true
}
// Failure
t.recv_chan <- fmt.Errorf("Pull zmq.Socket.Recv failure %s", err)
return
}
switch string(msg) {
case zmq_signal_output:
// Start polling for send
t.poll_items[1].Events = t.poll_items[1].Events | zmq.POLLOUT
case zmq_signal_input:
// If we staged a receive, process that
if t.recv_buff != nil {
select {
case t.recv_bridge_chan <- t.recv_buff:
t.recv_buff = nil
// Start polling for receive
t.poll_items[1].Events = t.poll_items[1].Events | zmq.POLLIN
default:
// Do nothing, we were asked for receive but channel is already full
}
} else {
// Start polling for receive
t.poll_items[1].Events = t.poll_items[1].Events | zmq.POLLIN
}
case zmq_signal_shutdown:
// Shutdown
return
}
ok = true
return
}
func watchSub(global_sub_socket, global_pub_socket, local_pub_socket zmq.Socket, filename string) {
for {
data, _ := global_sub_socket.Recv(0)
var msg Config
_ = json.Unmarshal(data, &msg)
local_config := readConfig(filename)
if msg.Time > local_config.Time {
body := []byte(msg.Body)
writeConfig(filename, body)
local_pub_socket.Send(body, 0)
} else if msg.Time < local_config.Time {
m, _ := json.Marshal(local_config)
global_pub_socket.Send(m, 0)
}
runtime.Gosched()
}
}
func watchRep(ctx zmq.Context, global_rep_socket, global_sub_socket zmq.Socket, clients *[]string, pub_address string) {
for {
data, _ := global_rep_socket.Recv(0)
var req Request
_ = json.Unmarshal(data, &req)
if req.Type == "connect" {
var creq ConnRequest
json.Unmarshal(data, &creq)
if !strSliceContains(*clients, creq.RepAddress) {
global_sub_socket.Connect(creq.PubAddress)
reply, _ := json.Marshal(ConnReply{pub_address, *clients})
global_rep_socket.Send(reply, 0)
for _, adr := range *clients {
req_socket := openSocket(ctx, zmq.REQ, adr)
req_socket.Send(data, 0)
req_socket.Close()
}
*clients = append(*clients, creq.RepAddress)
log.Printf("Connected: " + creq.RepAddress)
}
}
runtime.Gosched()
}
}
// the listen and server for mongrel, expects an address like this
// @addr = string config parameter like this:
// m2go.ListenAndServe("tcp://127.0.0.1:9555|tcp://127.0.0.1:9556|54c6755b-9628-40a4-9a2d-cc82a816345e", handler)
func ListenAndServe(addr string, handler http.Handler) {
var Context zmq.Context
var SocketIn zmq.Socket
var SocketOut zmq.Socket
var hasExited bool
var err error
m2addr := strings.Split(addr, "|") //
log.Printf("m2go serving %s\n", addr)
/*
Connection to ZMQ setup
*/
connect := func() {
if Context, err = zmq.NewContext(); err != nil {
panic("No ZMQ Context?")
}
// listen for incoming requests
if SocketIn, err = Context.NewSocket(zmq.PULL); err != nil {
panic("No ZMQ Socket?")
}
SocketIn.Connect(m2addr[0])
if SocketOut, err = Context.NewSocket(zmq.PUB); err != nil {
panic("No ZMQ Socket Outbound??")
}
// outbound response on a different channel
SocketOut.SetSockOptString(zmq.IDENTITY, m2addr[2])
//socket.SetSockOptString(zmq.SUBSCRIBE, filter)
SocketOut.Connect(m2addr[1])
}
connect()
handleResponse := func(response []byte) {
SocketOut.Send(response, 0)
}
stopper := func() {
if !hasExited {
hasExited = true
SocketOut.Close()
SocketIn.Close()
Context.Close()
}
}
defer stopper()
for {
// each inbound request
m2data, err := SocketIn.Recv(0)
//log.Println(string(m2data))
if err != nil {
log.Println("ZMQ Socket Input accept error ", err.Error())
} else {
go HandleM2Request(m2data, handleResponse, handler)
}
}
log.Print("after close of runner")
}
