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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| Copyright 2023 The Dapr Authors | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package transactions | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "fmt" | ||
|
|
||
| "github.com/dapr/kit/logger" | ||
| ) | ||
|
|
||
| // ExecuteInTransaction executes a function in a transaction. | ||
| // If the handler returns an error, the transaction is rolled back automatically. | ||
| func ExecuteInTransaction[T any](ctx context.Context, log logger.Logger, db *sql.DB, fn func(ctx context.Context, tx *sql.Tx) (T, error)) (res T, err error) { | ||
| // Start the transaction | ||
| // Note that the context here is tied to the entire transaction | ||
| tx, err := db.BeginTx(ctx, nil) | ||
| if err != nil { | ||
| return res, fmt.Errorf("failed to begin transaction: %w", err) | ||
| } | ||
|
|
||
| // Rollback in case of failure | ||
| var success bool | ||
| defer func() { | ||
| if success { | ||
| return | ||
| } | ||
| rollbackErr := tx.Rollback() | ||
| if rollbackErr != nil { | ||
| // Log errors only | ||
| log.Errorf("Error while attempting to roll back transaction: %v", rollbackErr) | ||
| } | ||
| }() | ||
|
|
||
| // Execute the callback | ||
| res, err = fn(ctx, tx) | ||
| if err != nil { | ||
| return res, err | ||
| } | ||
|
|
||
| // Commit the transaction | ||
| err = tx.Commit() | ||
| if err != nil { | ||
| return res, fmt.Errorf("failed to commit transaction: %w", err) | ||
| } | ||
| success = true | ||
|
|
||
| return res, nil | ||
| } |
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