+++ /dev/null
-// (c) Bernhard Tittelbach, 2013
-
-package main
-
-import (
- zmq "github.com/vaughan0/go-zmq"
- )
-
-// ---------- ZeroMQ Code -------------
-
-func ZmqsInit(sub_port string) (ctx *zmq.Context, sub_chans *zmq.Channels) {
- var err error
- ctx, err = zmq.NewContext()
- if err != nil {
- panic(err)
- }
- //close only on later panic, otherwise leave open:
- defer func(){ if r:= recover(); r != nil { ctx.Close(); panic(r) } }()
-
- if len(sub_port) > 0 {
- sub_sock, err := ctx.Socket(zmq.Sub)
- if err != nil {
- panic(err)
- }
- defer func() { if r:= recover(); r != nil { sub_sock.Close(); panic(r) } }()
-
- sub_sock.Subscribe([]byte{}) //subscribe empty filter -> aka to all messages
-
- if err = sub_sock.Connect(sub_port); err != nil {
- panic(err)
- }
-
- sub_chans = sub_sock.ChannelsBuffer(10)
- go zmqsHandleError(sub_chans)
- } else {
- sub_chans = nil
- }
-
- return
-}
-
-func zmqsHandleError(chans *zmq.Channels) {
- for error := range(chans.Errors()) {
- chans.Close()
- panic(error)
- }
-}
-
-func ZmqsRequestAnswer(sock *zmq.Socket, request [][]byte) (answer [][]byte) {
- if err := sock.Send(request); err != nil {
- panic(err)
- }
- parts, err := sock.Recv()
- if err != nil {
- panic(err)
- }
- return parts
-}
-
-func ZmqsAskQuestionsAndClose(ctx *zmq.Context, addr string, questions [][][]byte) [][][]byte {
- if len(addr) == 0 || ctx == nil { return nil }
-
- req_sock, err := ctx.Socket(zmq.Req)
- if err != nil {
- return nil
- }
- defer req_sock.Close()
-
- if err = req_sock.Connect(addr); err != nil {
- return nil
- }
-
- rv := make([][][]byte, len(questions))
- for index, q := range(questions) {
- rv[index] = ZmqsRequestAnswer(req_sock, q)
- }
- return rv
-}
\ No newline at end of file