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| author | Xe Iaso <me@xeiaso.net> | 2024-10-06 08:53:06 -0400 |
|---|---|---|
| committer | Xe Iaso <me@xeiaso.net> | 2024-10-06 08:56:03 -0400 |
| commit | 57c4d9757ae09700e6bd65de6e55f5cd17e6e6e2 (patch) | |
| tree | 0b4b8365328c7e66ab1fb6d4b4d4bb94ac796f78 /cmd/_old/tourian/ent/tx.go | |
| parent | fda09b55e316b7f162371cf52bc401fa742913e8 (diff) | |
| download | x-57c4d9757ae09700e6bd65de6e55f5cd17e6e6e2.tar.xz x-57c4d9757ae09700e6bd65de6e55f5cd17e6e6e2.zip | |
move some old code to the _old folder to save CI time
Signed-off-by: Xe Iaso <me@xeiaso.net>
Diffstat (limited to 'cmd/_old/tourian/ent/tx.go')
| -rw-r--r-- | cmd/_old/tourian/ent/tx.go | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/cmd/_old/tourian/ent/tx.go b/cmd/_old/tourian/ent/tx.go new file mode 100644 index 0000000..fffaa20 --- /dev/null +++ b/cmd/_old/tourian/ent/tx.go @@ -0,0 +1,213 @@ +// Code generated by ent, DO NOT EDIT. + +package ent + +import ( + "context" + "sync" + + "entgo.io/ent/dialect" +) + +// Tx is a transactional client that is created by calling Client.Tx(). +type Tx struct { + config + // ChatMessage is the client for interacting with the ChatMessage builders. + ChatMessage *ChatMessageClient + // Conversation is the client for interacting with the Conversation builders. + Conversation *ConversationClient + + // lazily loaded. + client *Client + clientOnce sync.Once + // ctx lives for the life of the transaction. It is + // the same context used by the underlying connection. + ctx context.Context +} + +type ( + // Committer is the interface that wraps the Commit method. + Committer interface { + Commit(context.Context, *Tx) error + } + + // The CommitFunc type is an adapter to allow the use of ordinary + // function as a Committer. If f is a function with the appropriate + // signature, CommitFunc(f) is a Committer that calls f. + CommitFunc func(context.Context, *Tx) error + + // CommitHook defines the "commit middleware". A function that gets a Committer + // and returns a Committer. For example: + // + // hook := func(next ent.Committer) ent.Committer { + // return ent.CommitFunc(func(ctx context.Context, tx *ent.Tx) error { + // // Do some stuff before. + // if err := next.Commit(ctx, tx); err != nil { + // return err + // } + // // Do some stuff after. + // return nil + // }) + // } + // + CommitHook func(Committer) Committer +) + +// Commit calls f(ctx, m). +func (f CommitFunc) Commit(ctx context.Context, tx *Tx) error { + return f(ctx, tx) +} + +// Commit commits the transaction. +func (tx *Tx) Commit() error { + txDriver := tx.config.driver.(*txDriver) + var fn Committer = CommitFunc(func(context.Context, *Tx) error { + return txDriver.tx.Commit() + }) + txDriver.mu.Lock() + hooks := append([]CommitHook(nil), txDriver.onCommit...) + txDriver.mu.Unlock() + for i := len(hooks) - 1; i >= 0; i-- { + fn = hooks[i](fn) + } + return fn.Commit(tx.ctx, tx) +} + +// OnCommit adds a hook to call on commit. +func (tx *Tx) OnCommit(f CommitHook) { + txDriver := tx.config.driver.(*txDriver) + txDriver.mu.Lock() + txDriver.onCommit = append(txDriver.onCommit, f) + txDriver.mu.Unlock() +} + +type ( + // Rollbacker is the interface that wraps the Rollback method. + Rollbacker interface { + Rollback(context.Context, *Tx) error + } + + // The RollbackFunc type is an adapter to allow the use of ordinary + // function as a Rollbacker. If f is a function with the appropriate + // signature, RollbackFunc(f) is a Rollbacker that calls f. + RollbackFunc func(context.Context, *Tx) error + + // RollbackHook defines the "rollback middleware". A function that gets a Rollbacker + // and returns a Rollbacker. For example: + // + // hook := func(next ent.Rollbacker) ent.Rollbacker { + // return ent.RollbackFunc(func(ctx context.Context, tx *ent.Tx) error { + // // Do some stuff before. + // if err := next.Rollback(ctx, tx); err != nil { + // return err + // } + // // Do some stuff after. + // return nil + // }) + // } + // + RollbackHook func(Rollbacker) Rollbacker +) + +// Rollback calls f(ctx, m). +func (f RollbackFunc) Rollback(ctx context.Context, tx *Tx) error { + return f(ctx, tx) +} + +// Rollback rollbacks the transaction. +func (tx *Tx) Rollback() error { + txDriver := tx.config.driver.(*txDriver) + var fn Rollbacker = RollbackFunc(func(context.Context, *Tx) error { + return txDriver.tx.Rollback() + }) + txDriver.mu.Lock() + hooks := append([]RollbackHook(nil), txDriver.onRollback...) + txDriver.mu.Unlock() + for i := len(hooks) - 1; i >= 0; i-- { + fn = hooks[i](fn) + } + return fn.Rollback(tx.ctx, tx) +} + +// OnRollback adds a hook to call on rollback. +func (tx *Tx) OnRollback(f RollbackHook) { + txDriver := tx.config.driver.(*txDriver) + txDriver.mu.Lock() + txDriver.onRollback = append(txDriver.onRollback, f) + txDriver.mu.Unlock() +} + +// Client returns a Client that binds to current transaction. +func (tx *Tx) Client() *Client { + tx.clientOnce.Do(func() { + tx.client = &Client{config: tx.config} + tx.client.init() + }) + return tx.client +} + +func (tx *Tx) init() { + tx.ChatMessage = NewChatMessageClient(tx.config) + tx.Conversation = NewConversationClient(tx.config) +} + +// txDriver wraps the given dialect.Tx with a nop dialect.Driver implementation. +// The idea is to support transactions without adding any extra code to the builders. +// When a builder calls to driver.Tx(), it gets the same dialect.Tx instance. +// Commit and Rollback are nop for the internal builders and the user must call one +// of them in order to commit or rollback the transaction. +// +// If a closed transaction is embedded in one of the generated entities, and the entity +// applies a query, for example: ChatMessage.QueryXXX(), the query will be executed +// through the driver which created this transaction. +// +// Note that txDriver is not goroutine safe. +type txDriver struct { + // the driver we started the transaction from. + drv dialect.Driver + // tx is the underlying transaction. + tx dialect.Tx + // completion hooks. + mu sync.Mutex + onCommit []CommitHook + onRollback []RollbackHook +} + +// newTx creates a new transactional driver. +func newTx(ctx context.Context, drv dialect.Driver) (*txDriver, error) { + tx, err := drv.Tx(ctx) + if err != nil { + return nil, err + } + return &txDriver{tx: tx, drv: drv}, nil +} + +// Tx returns the transaction wrapper (txDriver) to avoid Commit or Rollback calls +// from the internal builders. Should be called only by the internal builders. +func (tx *txDriver) Tx(context.Context) (dialect.Tx, error) { return tx, nil } + +// Dialect returns the dialect of the driver we started the transaction from. +func (tx *txDriver) Dialect() string { return tx.drv.Dialect() } + +// Close is a nop close. +func (*txDriver) Close() error { return nil } + +// Commit is a nop commit for the internal builders. +// User must call `Tx.Commit` in order to commit the transaction. +func (*txDriver) Commit() error { return nil } + +// Rollback is a nop rollback for the internal builders. +// User must call `Tx.Rollback` in order to rollback the transaction. +func (*txDriver) Rollback() error { return nil } + +// Exec calls tx.Exec. +func (tx *txDriver) Exec(ctx context.Context, query string, args, v any) error { + return tx.tx.Exec(ctx, query, args, v) +} + +// Query calls tx.Query. +func (tx *txDriver) Query(ctx context.Context, query string, args, v any) error { + return tx.tx.Query(ctx, query, args, v) +} + +var _ dialect.Driver = (*txDriver)(nil) |
