Conclusion

You have reached the end of the Transactional Outbox chapter. This lesson summarizes what the pattern gives you, what it costs, and how it relates to the other patterns in this course. Nothing here is new; it is the whole chapter in one place.

What the Pattern Gives You

The outbox pattern solves the dual-write problem. Here the two systems are the service's database and the message broker, and neither one can join the other's transaction.

The pattern turns the two writes into one. The service writes the event as a row in an outbox table, a table in its own database