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main.go
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main.go
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package main
import (
"context"
"log"
"net/http"
"time"
"github.com/ryanjoy0000/go-microservices-arch/logger-service/data"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
const (
webPort = ":80"
rpcPort = ":5001"
mongoUrl = "mongodb://mongo:27017"
grpcPort = ":50001"
maxTimeout = 15 * time.Second
)
var mongoClient *mongo.Client
type Config struct {
Models data.Models
}
func main() {
var app Config
// connect to Mongo DB
mongoClient, err := connectMongoDB()
if err != nil {
log.Panic(err)
}
// check for successul DB connection
if mongoClient != nil {
log.Println("Connected to Mongo DB")
// set up config
app = Config{
Models: data.New(mongoClient),
}
}
// context for DB
ctx := context.Background()
ctx, cancelFunc := context.WithTimeout(ctx, maxTimeout)
// defer cancel func
defer cancelFunc()
// close DB connection after use
defer closeMongoDB(ctx)
// set up web server
log.Println("Starting auth service on port", webPort)
// define http server
srv := &http.Server{
Addr: webPort,
Handler: app.routes(),
}
// start the server
err = srv.ListenAndServe()
if err != nil {
log.Panic("error starting service", err)
}
}
func connectMongoDB() (*mongo.Client, error) {
// set the mongo DB connection options
clientOptions := options.Client().ApplyURI(mongoUrl)
clientOptions.SetAuth(options.Credential{
Username: "admin",
Password: "password",
})
// connect
mongoClient, err := mongo.Connect(context.TODO(), clientOptions)
if err != nil {
log.Println("Error connecting mongo DB", err)
return nil, err
}
return mongoClient, err
}
func closeMongoDB(ctx context.Context) {
err := mongoClient.Disconnect(ctx)
if err != nil {
log.Panic(err)
}
}