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Reliable Microservices Data Exchange With the Outbox Pattern

debezium.io · 6,493 words · saved by 1 readers

As part of their business logic, microservices often do not only have to update their own local data store, but they also need to notify other services about data changes that happened. The outbox pattern describes an approach for letting services execute these two tasks in a safe and consistent manner; it provides source services with instant "read your own writes" semantics, while offering reliable, eventually consistent data exchange across service boundaries. Update (13 Sept. 2019): To simplify usage of the outbox pattern, Debezium now provides a ready-to-use SMT for routing outbox events. The custom SMT discussed in this blog post is not needed any longer. If you’ve built a couple of microservices, you’ll probably agree that the hardest part about them is data: microservices don’t exist in isolation and very often they need to propagate data and data changes amongst each other. For instance consider a microservice that manages purchase orders: when a new order is placed, informati

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