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db_wrap.go
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db_wrap.go
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package do
import (
"context"
"database/sql"
"fmt"
"log"
)
func WrapDB(
ctx context.Context,
driverName string,
dataSourceName string,
f func(
ctx context.Context,
conn *sql.DB,
) error,
) error {
db, err := sql.Open(driverName, dataSourceName)
if err != nil {
return err
}
if err := f(ctx, db); err != nil {
return err
}
return nil
}
func WrapTx(
ctx context.Context,
db *sql.DB,
f func(
ctx context.Context,
tx *sql.Tx,
) error,
) (err error) {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return
}
var success bool
defer func() {
if !success {
tx.Rollback()
} else {
tx.Commit()
}
}()
err = f(ctx, tx)
if err != nil {
return err
}
success = true
return
}
func WrapTxV[R any](
ctx context.Context,
db *sql.DB,
f func(
ctx context.Context,
tx *sql.Tx,
) (R, error),
) (r R, err error) {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return
}
var success bool
defer func() {
if !success {
tx.Rollback()
} else {
tx.Commit()
}
}()
r, err = f(ctx, tx)
if err != nil {
return
}
success = true
return
}
func WrapSQLConn(
ctx context.Context,
db *sql.DB,
f func(
ctx context.Context,
conn *sql.Conn,
) error,
) error {
// 获取连接,并在返回前释放
conn, err := db.Conn(ctx)
if err != nil {
return err
}
defer func() {
if err := conn.Close(); err != nil {
log.Printf("close conn failed: %v", err)
}
}()
if err := f(ctx, conn); err != nil {
funcName := FuncName(2, true)
return fmt.Errorf("[DB] call in %s failed: %w", funcName, err)
}
return nil
}
// WrapSQLQueryRows query by stmt and args, return values with dest
// only support one row
func WrapSQLQueryRows(
ctx context.Context,
db *sql.DB,
stmt string,
args []interface{},
dest ...interface{},
) error {
if err := WrapSQLConn(ctx, db, func(ctx context.Context, conn *sql.Conn) error {
rows, err := conn.QueryContext(ctx, stmt, args...)
if err != nil {
return err
}
defer rows.Close()
for rows.Next() {
err = rows.Scan(dest...)
if err != nil {
return err
}
}
if err := rows.Err(); err != nil {
return err
}
return nil
}); err != nil {
return err
}
return nil
}
// WrapConnFindAll query by stmt and args, return values with dest
// support many rows
func WrapConnFindAll[F Finder[R], R any](
ctx context.Context,
db *sql.DB,
finder F,
initial R,
) (r []R, err error) {
if err = WrapSQLConn(ctx, db, func(ctx context.Context, conn *sql.Conn) error {
err = FindList(conn, finder, &r)
if err != nil {
return err
}
return nil
}); err != nil {
return
}
return
}
func WrapTxFindAll[F Finder[R], R any](
ctx context.Context,
db *sql.DB,
finder F,
initial R,
) (r []R, err error) {
if err = WrapTx(ctx, db, func(ctx context.Context, tx *sql.Tx) error {
err = FindList(tx, finder, &r)
if err != nil {
return err
}
return nil
}); err != nil {
return
}
return
}