Outboxen is a library for implementing the transactional outbox pattern in Go.

I found that there weren't many libraries for implementing this in Go, and the ones that did exist made different design trade-offs than I would make.

For an example using MySQL via GORM, see the outboxen-gorm example here.

• Makes no assumptions about your storage mechanism, you provide:
  • A way to atomically claim entries in storage for a given processor
  • A way to retrieve entries claimed by a given processor
  • A way to delete entries
• Compatible with horizontal scaling
  • Safely claims outbox entries for publishing, with a deadline for gracefully tolerating failures
• Designed not to interfere with the transactional part of "transactional outbox pattern"
  • It does not create transactions for you
  • You write entries to your outbox storage in the same transaction as your state modification

• outboxen-gorm - implements the storage layer using GORM