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package main
import (
"context"
"fmt"
"net/http"
"os"
"os/signal"
handler "hdfs-writer/pkg/handler"
pipeline "hdfs-writer/pkg/pipeline"
utils "hdfs-writer/pkg/utils"
)
func main() {
slogger := utils.GetLoggerInstance()
// Create the server
httpServer := &http.Server{
Handler: handler.CreateRouter(),
Addr: ":9393",
}
connectionsClose := make(chan bool)
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 pipeline.ChannelMap {
slogger.Info("Begin:: Closing writer goroutines::")
slogger.Infof("Closing writer goroutine :: %s", eachWriter)
delete(pipeline.ChannelMap, eachWriter)
eachChannel <- true
}
httpServer.Shutdown(context.Background())
/*once all goroutines are signalled and httpServer is shutdown,
send close to main thread */
connectionsClose <- true
close(connectionsClose)
}()
// Sever starts listening
err := httpServer.ListenAndServe()
if err != nil && err != http.ErrServerClosed {
slogger.Fatal(err)
}
pipeline.Wg.Wait()
<-connectionsClose //main thread waiting to receive close signal
}
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