100 lines
2.1 KiB
Go
100 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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"flag"
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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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"gitea.local.lab/Lbenedar/greenlight/internal/data"
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_ "github.com/lib/pq"
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)
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const version = "1.0.0"
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type application struct {
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config config
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logger *log.Logger
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models data.Models
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}
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type config struct {
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port int
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env string
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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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func openDB(cfg config) (*sql.DB, error) {
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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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db.SetMaxIdleConns(cfg.db.maxIdleConns)
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db.SetMaxOpenConns(cfg.db.maxOpenConns)
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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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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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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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func main() {
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var cfg config
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flag.IntVar(&cfg.port, "port", 4000, "API server port")
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flag.StringVar(&cfg.env, "env", "development", "Enivornment (development|staging|production)")
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flag.StringVar(&cfg.db.dsn, "db-dsn", os.Getenv("GREENLIGHT_DB_DSN"), "PostgreSQL DSN")
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flag.IntVar(&cfg.db.maxOpenConns, "db-max-open-conns", 25, "PostgreSQL max open connections")
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flag.IntVar(&cfg.db.maxIdleConns, "db-max-idle-conns", 25, "PostgreSQL max idle connections")
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flag.StringVar(&cfg.db.maxIdleTime, "db-max-idle-time", "15m", "PostgreSQL max connection idle time")
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flag.Parse()
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logger := log.New(os.Stdout, "", log.Ldate|log.Ltime)
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db, err := openDB(cfg)
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if err != nil {
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logger.Fatal(err)
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}
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defer db.Close()
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logger.Printf("database connection pool established")
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app := &application{
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config: cfg,
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logger: logger,
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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", app.config.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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logger.Printf("starting %s server on %s", cfg.env, srv.Addr)
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err = srv.ListenAndServe()
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logger.Fatal(err)
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}
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