/
connect.go
83 lines (65 loc) · 1.46 KB
/
connect.go
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package edb
import (
"database/sql"
"fmt"
)
type (
// connect connections
connect struct {
db *sql.DB
config map[string]*Config
driver string
}
)
// newConnect new
func newConnect() *connect {
return &connect{
config: make(map[string]*Config, 10),
}
}
// AddConfig add connection configuration
func (conn *connect) AddConfig(connectName string, config *Config) bool {
if config.DNS() == "" {
return false
}
conn.config[connectName] = config
return true
}
// Connect connect to the database
func (conn *connect) Connect(connectName string) error {
var (
c *Config
ok bool
)
if c, ok = conn.config[connectName]; !ok {
return fmt.Errorf("edb: connect.Connect err: %s : database connection configuration dose not exist", connectName)
}
conn.driver = c.Driver
db, err := sql.Open(c.Driver, c.DNS())
if err != nil {
return fmt.Errorf("edb: connect.Connect err: %s", err.Error())
}
err2 := db.Ping()
if err2 != nil {
return fmt.Errorf("edb: connect.Connect err: %s", err2.Error())
}
conn.db = db
return nil
}
// Db sql.DB
func (conn *connect) Db() *sql.DB {
return conn.db
}
// Exec DB.Exec
func (conn *connect) Exec(query string, args ...interface{}) (sql.Result, error) {
return conn.db.Exec(query, args...)
}
// Query query
func (conn *connect) Query(query string, args ...interface{}) (*sql.Rows, error) {
stmt, err := conn.db.Prepare(query)
defer stmt.Close()
if err != nil {
return nil, err
}
return stmt.Query(args...)
}