forked from jackc/pgx
/
opendb.go
64 lines (50 loc) · 1.32 KB
/
opendb.go
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// +build go1.10
package stdlib
import (
"context"
"database/sql"
"database/sql/driver"
"github.com/jackc/pgx"
)
// OptionOpenDB options for configuring the driver when opening a new db pool.
type OptionOpenDB func(*connector)
// OptionAfterConnect provide a callback for after connect.
func OptionAfterConnect(ac func(*pgx.Conn) error) OptionOpenDB {
return func(dc *connector) {
dc.AfterConnect = ac
}
}
func OpenDB(config pgx.ConnConfig, opts ...OptionOpenDB) *sql.DB {
c := connector{
ConnConfig: config,
AfterConnect: func(*pgx.Conn) error { return nil }, // noop after connect by default
driver: pgxDriver,
}
for _, opt := range opts {
opt(&c)
}
return sql.OpenDB(c)
}
type connector struct {
pgx.ConnConfig
AfterConnect func(*pgx.Conn) error // function to call on every new connection
driver *Driver
}
// Connect implement driver.Connector interface
func (c connector) Connect(ctx context.Context) (driver.Conn, error) {
var (
err error
conn *pgx.Conn
)
if conn, err = pgx.Connect(c.ConnConfig); err != nil {
return nil, err
}
if err = c.AfterConnect(conn); err != nil {
return nil, err
}
return &Conn{conn: conn, driver: c.driver, connConfig: c.ConnConfig}, nil
}
// Driver implement driver.Connector interface
func (c connector) Driver() driver.Driver {
return c.driver
}