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main.go
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main.go
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package main
import (
"context"
"flag"
"net"
"net/http"
"github.com/gorilla/mux"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
pb "github.com/minmax1996/aoimdb/api/proto/command"
"github.com/minmax1996/aoimdb/cmd/aoimd/grpcconnect"
"github.com/minmax1996/aoimdb/cmd/aoimd/tcpconnect"
"github.com/minmax1996/aoimdb/internal/aoimdb"
"github.com/minmax1996/aoimdb/logger"
"google.golang.org/grpc"
)
func init() {
parseFlags()
aoimdb.InitDatabaseController()
aoimdb.AddUser("admin", "pass")
}
const (
tcpPort = ":1593" // last digit of "aoim": a=1 o=15 i=9 m=13
grcpPort = ":50051"
httpProxyPort = ":8081"
)
var (
assetsPath = "./ui/build"
)
func parseFlags() {
flag.StringVar(&assetsPath, "assets_path", "./ui/build", "a string var for username")
flag.Parse()
}
func startListenForTCPConnects(errChan chan error) error {
server := tcpconnect.CreateTCPServer(errChan)
listener, err := net.Listen("tcp", tcpPort)
if err != nil {
logger.Error(err)
return err
}
logger.InfoFormat("Start listening tcp connections on: %s", tcpPort)
go func(errorChannel chan error) {
for { // listen for connections
conn, err := listener.Accept()
if err != nil {
errorChannel <- err
continue
}
logger.Info("Connected")
server.Connect(conn)
}
}(errChan)
return nil
}
func startWebUI(errChan chan error) error {
r := mux.NewRouter()
r.Handle("/", http.FileServer(http.Dir(assetsPath)))
r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(assetsPath+"/static/"))))
go func() {
if err := http.ListenAndServe(":3000", r); err != nil {
errChan <- err
}
}()
return nil
}
func startListenForGRPCConnects(errChan chan error) error {
listener, err := net.Listen("tcp", grcpPort)
if err != nil {
return err
}
s := grpc.NewServer()
pb.RegisterDatabaseControllerServer(s, &grpcconnect.Server{})
go func() {
if err := s.Serve(listener); err != nil {
errChan <- err
}
}()
return nil
}
func serveHttpGateway(errChan chan error) error {
ctx := context.Background()
// Register gRPC server endpoint
// Note: Make sure the gRPC server is running properly and accessible
muxx := runtime.NewServeMux()
opts := []grpc.DialOption{grpc.WithInsecure()}
err := pb.RegisterDatabaseControllerHandlerFromEndpoint(ctx, muxx, grcpPort, opts)
if err != nil {
return err
}
go func() {
if err := http.ListenAndServe(httpProxyPort, muxx); err != nil {
errChan <- err
}
}()
return nil
}
func main() {
// main error chan
errChan := make(chan error)
logger.Info("This is EntryPoint for database service")
if err := startListenForTCPConnects(errChan); err != nil {
logger.Fatal(err)
return
}
if err := startWebUI(errChan); err != nil {
logger.Fatal(err)
return
}
if err := startListenForGRPCConnects(errChan); err != nil {
logger.Fatal(err)
return
}
if err := serveHttpGateway(errChan); err != nil {
logger.Fatal(err)
return
}
//TODO MAnual Backup on stop app
//main loop for errors
for {
select {
case err := <-errChan:
logger.Error(err)
}
}
}