add Mongodb pool configuration

.env

@@ -1,2 +1,5 @@
 MONGO_URI=mongodb://mongo:mongo@localhost:27017
-MONGO_DATABASE=golang
+MONGO_DATABASE=golang
+MONGO_POOL_MIN=10
+MONGO_POOL_MAX=100
+MONGO_MAX_IDLE_TIME_SECOND=60

.env.test

@@ -1,2 +1,5 @@
 MONGO_URI=mongodb://mongo:mongo@localhost:27017
-MONGO_DATABASE=golang_test
+MONGO_DATABASE=golang_test
+MONGO_POOL_MIN=10
+MONGO_POOL_MAX=100
+MONGO_MAX_IDLE_TIME_SECOND=60

config/mongo.go

@@ -5,14 +5,30 @@ import (
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 	"golang-clean-architecture/exception"
+	"strconv"
 	"time"
 )
 
 func NewMongoDatabase(configuration Config) *mongo.Database {
 	ctx, cancel := NewMongoContext()
 	defer cancel()
 
-	client, err := mongo.NewClient(options.Client().ApplyURI(configuration.Get("MONGO_URI")))
+	mongoPoolMin, err := strconv.Atoi(configuration.Get("MONGO_POOL_MIN"))
+	exception.PanicIfNeeded(err)
+
+	mongoPoolMax, err := strconv.Atoi(configuration.Get("MONGO_POOL_MAX"))
+	exception.PanicIfNeeded(err)
+
+	mongoMaxIdleTime, err := strconv.Atoi(configuration.Get("MONGO_MAX_IDLE_TIME_SECOND"))
+	exception.PanicIfNeeded(err)
+
+	option := options.Client().
+		ApplyURI(configuration.Get("MONGO_URI")).
+		SetMinPoolSize(uint64(mongoPoolMin)).
+		SetMaxPoolSize(uint64(mongoPoolMax)).
+		SetMaxConnIdleTime(time.Duration(mongoMaxIdleTime) * time.Second)
+
+	client, err := mongo.NewClient(option)
 	exception.PanicIfNeeded(err)
 
 	err = client.Connect(ctx)