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db.go
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db.go
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// Copyright 2020 CleverGo. All rights reserved.
// Use of this source code is governed by a MIT style license that can be found
// in the LICENSE file.
package sqlex
import (
"context"
"database/sql"
"github.com/jmoiron/sqlx"
)
var (
// ensurces *sql.Tx and *sqlx.Tx implement DB.
_ DB = &sql.DB{}
_ DBx = &sqlx.DB{}
)
// DB is an interface for sql.DB and sqlx.DB.
type DB interface {
Begin() (*sql.Tx, error)
BeginTx(ctx context.Context, opts *sql.TxOptions) (*sql.Tx, error)
}
// DBx is an interface for sqlx.DB.
type DBx interface {
DB
Beginx() (*sqlx.Tx, error)
BeginTxx(ctx context.Context, opts *sql.TxOptions) (*sqlx.Tx, error)
}
// Transact begins a transaction, and then invokes fn.
// Rollback automatically if receives a panic or error.
func Transact(db DB, fn func(tx *sql.Tx) error) (err error) {
tx, err := db.Begin()
if err != nil {
return
}
defer func() {
if p := recover(); p != nil {
tx.Rollback()
panic(p)
} else if err != nil {
tx.Rollback()
} else {
err = tx.Commit()
}
}()
err = fn(tx)
return err
}
// TransactContext begins a transaction, and then invokes fn.
// Rollback automatically if receives a panic or error.
func TransactContext(ctx context.Context, opts *sql.TxOptions, db DB, fn func(ctx context.Context, tx *sql.Tx) error) (err error) {
tx, err := db.BeginTx(ctx, opts)
if err != nil {
return
}
defer func() {
if p := recover(); p != nil {
tx.Rollback()
panic(p)
} else if err != nil {
tx.Rollback()
} else {
err = tx.Commit()
}
}()
err = fn(ctx, tx)
return err
}
// Transactx begins a transaction, and then invokes fn.
// Rollback automatically if receives a panic or error.
func Transactx(db DBx, fn func(tx *sqlx.Tx) error) (err error) {
tx, err := db.Beginx()
if err != nil {
return
}
defer func() {
if p := recover(); p != nil {
tx.Rollback()
panic(p)
} else if err != nil {
tx.Rollback()
} else {
err = tx.Commit()
}
}()
err = fn(tx)
return err
}
// TransactContextx begins a transaction, and then invokes fn.
// Rollback automatically if receives a panic or error.
func TransactContextx(ctx context.Context, opts *sql.TxOptions, db DBx, fn func(ctx context.Context, tx *sqlx.Tx) error) (err error) {
tx, err := db.BeginTxx(ctx, opts)
if err != nil {
return
}
defer func() {
if p := recover(); p != nil {
tx.Rollback()
panic(p)
} else if err != nil {
tx.Rollback()
} else {
err = tx.Commit()
}
}()
err = fn(ctx, tx)
return err
}