70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package transactions
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import (
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"context"
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"fmt"
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"time"
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"github.com/jackc/pgx/v5"
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pginterfaces "github.com/dapr/components-contrib/common/component/postgresql/interfaces"
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"github.com/dapr/kit/logger"
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)
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// ExecuteInTransaction executes a function in a transaction.
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// If the handler returns an error, the transaction is rolled back automatically.
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func ExecuteInTransaction[T any](ctx context.Context, log logger.Logger, db pginterfaces.PGXPoolConn, timeout time.Duration, fn func(ctx context.Context, tx pgx.Tx) (T, error)) (res T, err error) {
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// Start the transaction
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queryCtx, queryCancel := context.WithTimeout(ctx, timeout)
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defer queryCancel()
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tx, err := db.Begin(queryCtx)
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if err != nil {
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return res, fmt.Errorf("failed to begin transaction: %w", err)
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}
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// Rollback in case of failure
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var success bool
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defer func() {
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if success {
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return
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}
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rollbackCtx, rollbackCancel := context.WithTimeout(ctx, timeout)
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defer rollbackCancel()
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rollbackErr := tx.Rollback(rollbackCtx)
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if rollbackErr != nil {
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// Log errors only
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log.Errorf("Error while attempting to roll back transaction: %v", rollbackErr)
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}
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}()
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// Execute the callback
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res, err = fn(ctx, tx)
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if err != nil {
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return res, err
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}
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// Commit the transaction
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queryCtx, queryCancel = context.WithTimeout(ctx, timeout)
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defer queryCancel()
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err = tx.Commit(queryCtx)
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if err != nil {
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return res, fmt.Errorf("failed to commit transaction: %w", err)
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}
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success = true
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return res, nil
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}
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