mirror of https://github.com/stashapp/stash.git
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package txn
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import "context"
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type Manager interface {
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Begin(ctx context.Context) (context.Context, error)
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Commit(ctx context.Context) error
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Rollback(ctx context.Context) error
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AddPostCommitHook(ctx context.Context, hook TxnFunc)
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AddPostRollbackHook(ctx context.Context, hook TxnFunc)
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}
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type DatabaseProvider interface {
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WithDatabase(ctx context.Context) (context.Context, error)
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}
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type TxnFunc func(ctx context.Context) error
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// WithTxn executes fn in a transaction. If fn returns an error then
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// the transaction is rolled back. Otherwise it is committed.
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func WithTxn(ctx context.Context, m Manager, fn TxnFunc) error {
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var err error
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ctx, err = m.Begin(ctx)
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if err != nil {
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return err
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}
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defer func() {
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if p := recover(); p != nil {
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// a panic occurred, rollback and repanic
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_ = m.Rollback(ctx)
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panic(p)
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}
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if err != nil {
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// something went wrong, rollback
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_ = m.Rollback(ctx)
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} else {
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// all good, commit
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err = m.Commit(ctx)
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}
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}()
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err = fn(ctx)
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return err
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}
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// WithDatabase executes fn with the context provided by p.WithDatabase.
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// It does not run inside a transaction, so all database operations will be
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// executed in their own transaction.
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func WithDatabase(ctx context.Context, p DatabaseProvider, fn TxnFunc) error {
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var err error
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ctx, err = p.WithDatabase(ctx)
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if err != nil {
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return err
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}
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return fn(ctx)
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}
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