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package main
import (
"context"
"fmt"
"net/http"
"os"
"os/signal"
"time"
handler "hdfs-writer/pkg/handler"
utils "hdfs-writer/pkg/utils"
)
func main() {
slogger := utils.GetLoggerInstance()
// Create the server
httpServer := &http.Server{
Handler: handler.CreateRouter(),
Addr: ":9393",
}
connectionsClose := make(chan struct{})
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
<-c // function literal waiting to receive Interrupt signal
fmt.Printf(":::Got the kill signal:::")
slogger.Info(":::Got the kill signal:::")
for eachWriter, eachChannel := range handler.ChannelMap {
slogger.Infof("Closing writer goroutine :: %s", eachWriter)
slogger.Infof("eachChannel:: %v", eachChannel)
close(eachChannel)
// This wait time ensures that the each of the channel is killed before
// main routine finishes.
time.Sleep(time.Second * 5)
}
//once all goroutines are signalled, send close to main thread
httpServer.Shutdown(context.Background())
close(connectionsClose)
}()
// Sever starts listening
err := httpServer.ListenAndServe()
if err != nil && err != http.ErrServerClosed {
slogger.Fatal(err)
}
<-connectionsClose //main thread waiting to receive close signal
}
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