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concurrent processes initially seems to work

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This commit is contained in:
postmannen 2021-01-29 06:09:48 +01:00
parent 37733f5974
commit b543ec589a
1 changed files with 13 additions and 7 deletions
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20
central/main.go
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@ -71,6 +71,10 @@ func (s *server) Run() {
// fmt.Printf("*** %#v\n", proc)
go s.spawnProcess(proc)
proc = s.prepareNewProcess("btship2")
// fmt.Printf("*** %#v\n", proc)
go s.spawnProcess(proc)
// start the error handling
go func() {
@ -131,7 +135,7 @@ func (s *server) spawnProcess(proc process) {
for {
m := getMessageToDeliver()
m.ID = s.processes[proc.node].messageID
messageDeliver(string(proc.node), m, s.natsConn)
messageDeliver(proc, m, s.natsConn)
// Increment the counter for the next message to be sent.
proc.messageID++
@ -140,7 +144,7 @@ func (s *server) spawnProcess(proc process) {
// simulate that we get an error, and that we can send that
// out of the process and receive it in another thread.
s.processes[proc.node].errorCh <- "received an error from process: " + fmt.Sprintf("%v\n", proc.processID)
// s.processes[proc.node].errorCh <- "received an error from process: " + fmt.Sprintf("%v\n", proc.processID)
//fmt.Printf("%#v\n", s.processes[proc.node])
}
@ -155,7 +159,7 @@ func getMessageToDeliver() Message {
}
}
func messageDeliver(node string, message Message, natsConn *nats.Conn) {
func messageDeliver(proc process, message Message, natsConn *nats.Conn) {
for {
dataPayload, err := gobEncodePayload(message)
if err != nil {
@ -163,9 +167,11 @@ func messageDeliver(node string, message Message, natsConn *nats.Conn) {
}
msg := &nats.Msg{
Subject: node,
Reply: "subjectReply",
Data: dataPayload,
Subject: string(proc.node),
// Structure of the reply message are:
// reply-<node name>-pid<pid nr>
Reply: "reply-" + string(proc.node) + "-pid" + fmt.Sprint(proc.processID),
Data: dataPayload,
}
// The SubscribeSync used in the subscriber, will get messages that
@ -190,7 +196,7 @@ func messageDeliver(node string, message Message, natsConn *nats.Conn) {
// continue and resend if to reply received.
msgReply, err := subReply.NextMsg(time.Second * 10)
if err != nil {
log.Printf("error: subRepl.NextMsg failed: %v\n", err)
log.Printf("error: subRepl.NextMsg failed for node=%v pid=%v: %v\n", proc.node, proc.processID, err)
// did not receive a reply, continuing from top again
continue
}