Using an Inbox for Messages
Explore how to implement an inbox for messages in Golang to achieve atomic database operations and idempotent message processing. This lesson guides you through creating middleware for message deduplication, managing database transactions, and updating handlers to ensure reliable and scalable transactional messaging in event-driven applications.
We have now updated the Depot module so that we can work with a single database connection and transaction. We want to now use that to make our database interactions and message publishing atomic.
When we make the publishing and handling of the messages atomic alongside the other changes that are saved into our database, we gain the following benefits:
Idempotent message processing: We can be sure that the message that we are processing will only be processed a single time.
No application state fragmentation: When state changes occur in our application, they will be saved as a single unit or not at all.
With the majority of the work to set up the transactions behind us, we can now implement the inboxes and outboxes for our messages. ...