This repository iterates through the book's chapters. Readers can use git reset --hard COMMIT to view the corresponding implementation of the functionalities introduced in each chapter.

Here is the mapping of each functionality:

• The at-least-once implementation with acknowledger differs from what the book suggests. In this approach, the acknowledger is employed to oversee the event cache for each incoming queue. If an event is processed successfully, the cache is deleted; otherwise, the event is placed back into the incoming queue.