68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
package db
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import (
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"database/sql"
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"errors"
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"fmt"
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"time"
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_ "github.com/go-sql-driver/mysql"
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)
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var x map[string]*sql.DB = make(map[string]*sql.DB)
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var ErrNoDb = errors.New("no db")
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type Config struct {
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Addr string `toml:"addr" json:"addr"`
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User string `toml:"user" json:"user"`
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Pwd string `toml:"pwd" json:"pwd"`
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Db string `toml:"db" json:"db"`
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Options string `toml:"options" json:"options"`
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MaxOpenConns int `toml:"max_open_conns" json:"max_open_conns"`
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MaxIdleConns int `toml:"max_idle_conns" json:"max_idle_conns"`
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MaxConnLifeTime int `toml:"max_conn_life_time" json:"max_conn_life_time"`
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}
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func (c Config) Dsn() string {
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if c.Options == "" {
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format := "%s:%s@tcp(%s)/%s?charset=utf8mb4&timeout=5s"
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return fmt.Sprintf(format, c.User, c.Pwd, c.Addr, c.Db)
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} else {
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format := "%s:%s@tcp(%s)/%s?charset=utf8mb4&timeout=5s&%s"
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return fmt.Sprintf(format, c.User, c.Pwd, c.Addr, c.Db, c.Options)
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}
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}
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func Add(name string, c Config) error {
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db, err := sql.Open("mysql", c.Dsn())
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if err != nil {
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return err
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}
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if err := db.Ping(); err != nil {
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return err
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}
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db.SetMaxIdleConns(c.MaxIdleConns)
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db.SetMaxOpenConns(c.MaxOpenConns)
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if c.MaxConnLifeTime <= 0 {
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c.MaxConnLifeTime = 600 // Default 10 minutes
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}
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db.SetConnMaxLifetime(time.Duration(c.MaxConnLifeTime) * time.Second)
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_, ok := x[name]
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if ok {
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return errors.New("db exists")
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}
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x[name] = db
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return nil
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}
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func GetDB(name string) (*sql.DB, error) {
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db, ok := x[name]
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if ok {
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return db, nil
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}
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return nil, ErrNoDb
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}
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