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main.go
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main.go
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package main
import (
"fmt"
"os"
"os/signal"
"syscall"
"github.com/kapacity-io/mqtt-test-client/internal/listeners"
"github.com/kapacity-io/mqtt-test-client/internal/mqtt"
"github.com/kapacity-io/mqtt-test-client/internal/setup"
)
var (
// These variables are set during build time with -ldflags
Version string
Build string
)
func main() {
fmt.Printf("\n--- PROGRAM STARTS ---\n"+
"\tVersion: %s\n"+
"\tBuild: %s\n",
Version, Build)
cfg := setup.ParseConfigsFromFlags()
if err := cfg.Validate(); err != nil {
fmt.Printf("Invalid configs: %v", err)
os.Exit(1)
}
fmt.Printf("options:\n%s\n\n", cfg.String())
mqtt := mqtt.NewMQTTService()
err := mqtt.RegisterMqttClient(
cfg.ClientID,
cfg.BrokerAddr,
cfg.TopicsToSub,
cfg.DeviceCert,
cfg.DeviceKey,
cfg.RootCA,
)
if err != nil {
fmt.Printf("Failed to initialize client to MQTT broker: %v\n", err)
os.Exit(1)
}
mqttlistener := listeners.NewMQTTListener(mqtt)
mqttlistener.Listen()
tcplistener, err := listeners.NewTCPListener(
"localhost:9596",
func(topic string, message string) {
mqtt.UserInputPubHandler(topic, message)
},
)
if err != nil {
fmt.Println("Error setting up TCP server:", err)
os.Exit(1)
}
tcplistener.Start()
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGKILL,
syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
<-c
fmt.Printf("stop signal caught -> stopping services\n")
tcplistener.Stop()
mqttlistener.Stop()
mqtt.Close()
fmt.Printf("\n\n\t--- PROGRAM EXISTS ---\n\n")
os.Exit(0)
}