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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"net"
"os"
"strconv"
"sync"
"time"
"github.com/badochov/distributed-shortest-path/src/libs/db"
"github.com/badochov/distributed-shortest-path/src/services/worker/discoverer"
"github.com/badochov/distributed-shortest-path/src/services/worker/link/link_server"
"github.com/badochov/distributed-shortest-path/src/services/worker/service"
"github.com/badochov/distributed-shortest-path/src/services/worker/worker"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
)
func getPortFromEnv(envName string) int {
portStr := os.Getenv(envName)
port, err := strconv.Atoi(portStr)
if err != nil {
log.Fatalf("Error parsing port from %s, %s", envName, err)
}
return port
}
func main() {
orm, err := db.ConnectToDefault()
if err != nil {
log.Fatal("Error opening db,", err)
}
config, err := rest.InClusterConfig()
if err != nil {
log.Fatal(err)
}
clientset := kubernetes.NewForConfigOrDie(config)
discovererDeps := discoverer.Deps{
Client: clientset,
Namespace: os.Getenv("NAMESPACE"),
LabelSelector: os.Getenv("WORKER_SERVICE_LABEL_SELECTOR"),
}
d := discoverer.New(discovererDeps)
regionIdStr := os.Getenv("REGION")
regionId, err := strconv.ParseUint(regionIdStr, 10, 16)
if err != nil {
log.Fatal("can't parser REGION", err)
}
linkPort := getPortFromEnv("LINK_SERVER_PORT")
workerDeps := worker.Deps{
Db: orm,
Discoverer: d,
RegionID: uint16(regionId),
Context: context.Background(),
LinkPort: linkPort,
}
wrkr, err := worker.New(workerDeps)
if err != nil {
log.Fatalf("error creating worker, %s", err)
}
// TODO [wprzytula] think about timeouts
ctx, can := context.WithTimeout(context.Background(), 3*time.Minute)
if err := wrkr.LoadRegionData(ctx); err != nil {
log.Fatalf("error loading region data, %s", err)
}
can()
serviceDeps := service.Deps{
Port: getPortFromEnv("WORKER_SERVER_PORT"),
Worker: wrkr,
}
sW := service.New(serviceDeps)
lL, err := net.Listen("tcp", fmt.Sprintf(":%d", linkPort))
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
linkDeps := link_server.Deps{
Listener: lL,
Worker: wrkr,
}
sL := link_server.New(linkDeps)
var wg sync.WaitGroup
wg.Add(2)
go func() {
defer wg.Done()
if err := sW.Run(); err != nil {
log.Fatalf("error running worker service server, %s", err)
}
}()
go func() {
defer wg.Done()
if err := sL.Run(); err != nil {
log.Fatalf("error running link service server, %s", err)
}
}()
wg.Wait()
}