mirror of
https://github.com/lyx0/nourybot.git
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112 lines
2.1 KiB
Go
112 lines
2.1 KiB
Go
package main
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import (
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"context"
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"database/sql"
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"fmt"
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"log"
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"net/http"
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"os"
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"time"
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"github.com/joho/godotenv"
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_ "github.com/lib/pq"
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"github.com/lyx0/nourybot/internal/data"
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"go.uber.org/zap"
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)
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type config struct {
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port int
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db struct {
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dsn string
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maxOpenConns int
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maxIdleConns int
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maxIdleTime string
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}
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}
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type application struct {
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Logger *zap.SugaredLogger
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Db *sql.DB
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Models data.Models
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}
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func main() {
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var cfg config
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// Initialize a new sugared logger that we'll pass on
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// down through the application.
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sugar := zap.NewExample().Sugar()
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defer sugar.Sync()
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err := godotenv.Load()
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if err != nil {
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log.Fatal("Error loading .env file")
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}
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// Database
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cfg.db.dsn = os.Getenv("DB_DSN")
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cfg.port = 3000
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cfg.db.maxOpenConns = 25
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cfg.db.maxIdleConns = 25
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cfg.db.maxIdleTime = "15m"
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// Establish database connection
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db, err := openDB(cfg)
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if err != nil {
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sugar.Fatal(err)
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}
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// Initialize Application
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app := &application{
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Logger: sugar,
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Db: db,
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Models: data.NewModels(db),
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}
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srv := &http.Server{
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Addr: fmt.Sprintf(":%d", cfg.port),
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Handler: app.routes(),
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IdleTimeout: time.Minute,
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ReadTimeout: 10 * time.Second,
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WriteTimeout: 10 * time.Second,
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}
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err = srv.ListenAndServe()
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sugar.Fatal(err)
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}
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// openDB returns the sql.DB connection pool.
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func openDB(cfg config) (*sql.DB, error) {
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// sql.Open() creates an empty connection pool with the provided DSN
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db, err := sql.Open("postgres", cfg.db.dsn)
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if err != nil {
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return nil, err
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}
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// Set database restraints.
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db.SetMaxOpenConns(cfg.db.maxOpenConns)
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db.SetMaxIdleConns(cfg.db.maxIdleConns)
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// Parse the maxIdleTime string into an actual duration and set it.
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duration, err := time.ParseDuration(cfg.db.maxIdleTime)
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if err != nil {
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return nil, err
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}
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db.SetConnMaxIdleTime(duration)
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// Create a new context with a 5 second timeout.
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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// db.PingContext() is needed to actually check if the
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// connection to the database was successful.
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err = db.PingContext(ctx)
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if err != nil {
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return nil, err
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}
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return db, nil
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}
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