bbgo_origin/pkg/service/database.go

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package service
import (
"context"
"github.com/c9s/rockhopper"
"github.com/go-sql-driver/mysql"
"github.com/jmoiron/sqlx"
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mysqlMigrations "github.com/c9s/bbgo/pkg/migrations/mysql"
sqlite3Migrations "github.com/c9s/bbgo/pkg/migrations/sqlite3"
)
// reflect cache for database
var dbCache = NewReflectCache()
type DatabaseService struct {
Driver string
DSN string
DB *sqlx.DB
}
func NewDatabaseService(driver, dsn string) *DatabaseService {
if driver == "mysql" {
var err error
dsn, err = ReformatMysqlDSN(dsn)
if err != nil {
// incorrect mysql dsn is logical exception
panic(err)
}
}
return &DatabaseService{
Driver: driver,
DSN: dsn,
}
}
func (s *DatabaseService) Connect() error {
var err error
s.DB, err = sqlx.Connect(s.Driver, s.DSN)
return err
}
func (s *DatabaseService) Insert(record interface{}) error {
sql := dbCache.InsertSqlOf(record)
_, err := s.DB.NamedExec(sql, record)
return err
}
func (s *DatabaseService) Close() error {
return s.DB.Close()
}
func (s *DatabaseService) Upgrade(ctx context.Context) error {
dialect, err := rockhopper.LoadDialect(s.Driver)
if err != nil {
return err
}
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var migrations rockhopper.MigrationSlice
switch s.Driver {
case "sqlite3":
migrations = sqlite3Migrations.Migrations()
case "mysql":
migrations = mysqlMigrations.Migrations()
}
// sqlx.DB is different from sql.DB
rh := rockhopper.New(s.Driver, dialect, s.DB.DB)
currentVersion, err := rh.CurrentVersion()
if err != nil {
return err
}
if err := rockhopper.Up(ctx, rh, migrations, currentVersion, 0); err != nil {
return err
}
return nil
}
func ReformatMysqlDSN(dsn string) (string, error) {
config, err := mysql.ParseDSN(dsn)
if err != nil {
return "", err
}
// we need timestamp and datetime fields to be parsed into time.Time struct
config.ParseTime = true
dsn = config.FormatDSN()
return dsn, nil
}