Initial commit with sample app

04-building-container-images/sample-app/api-golang/database/db.go

@@ -0,0 +1,35 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+var conn *pgxpool.Pool
+
+// InitDB initialize the database pool and returns error
+func InitDB(connString string) error {
+	var err error
+	conn, err = pgxpool.New(context.Background(), connString)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func GetTime(ctx *gin.Context) {
+	var tm time.Time
+
+	err := conn.QueryRow(ctx, "SELECT NOW() as now;").Scan(&tm)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(tm)
+}