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conn.go
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conn.go
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package db
import (
"fmt"
"strings"
"sync"
"github.com/si3nloong/goloquent"
)
var (
defaultDB *goloquent.DB
connPool *sync.Map // database connection pools
)
func init() {
connPool = new(sync.Map)
}
// Config :
type Config struct {
Username string
Password string
Host string
Port string
Database string
UnixSocket string
TLSConfig string
CharSet *goloquent.CharSet
Logger goloquent.LogHandler
}
// Open :
func Open(driver string, conf Config) (*goloquent.DB, error) {
driver = strings.TrimSpace(strings.ToLower(driver))
dialect, ok := goloquent.GetDialect(driver)
if !ok {
panic(fmt.Errorf("goloquent: unsupported database driver %q", driver))
}
pool := make(map[string]*goloquent.DB)
if p, ok := connPool.Load(driver); ok {
pool = p.(map[string]*goloquent.DB)
}
config := goloquent.Config{
Username: conf.Username,
Password: conf.Password,
Host: conf.Host,
Port: conf.Port,
TLSConfig: conf.TLSConfig,
Database: conf.Database,
UnixSocket: conf.UnixSocket,
CharSet: conf.CharSet,
Logger: conf.Logger,
}
config.Normalize()
conn, err := dialect.Open(config)
if err != nil {
return nil, err
}
if err := conn.Ping(); err != nil {
return nil, fmt.Errorf("goloquent: %s server has not response", driver)
}
db := goloquent.NewDB(driver, *config.CharSet, conn, dialect, conf.Logger)
pool[conf.Database] = db
connPool.Store(driver, pool)
// Override defaultDB whenever we initialise a new connection
defaultDB = db
return db, nil
}