MassTransit is getting a new transactional, or "real" outbox, and in this video the additional database support for MongoDb is covered. The new outbox (or is it an inbox/outbox) is a fully transactional outbox that can be used from both non-message-based sources (such as API controllers, or console applications) as well as message consumers and saga state machines. An inbox is also used, to ensure exactly-once (or idempotent, also known as deduplication) message delivery to consumers and saga state machines, providing an easy and consistent approach to ensuring idempotent message delivery.
Sample GitHub Repository (MongoDb Branch)
https://github.com/MassTransit/Sample-Outbox/tree/mongodb
Transactional Outbox Documentation (preliminary):
https://masstransit-project.com/advanced/transactional-outbox.html
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