Szymon Pobiega – Talk Session: Messages on the Outside, Messages on the Inside


Explore DDD 2019 – Denver, Sept. 16-20

In the classic paper, "Data on the Outside versus Data on the Inside," Pat Helland argued that data within a service boundary should be treated differently than data residing outside of it.

Here, Szymon argues that the same applies to messages. Inside a service, boundary messages are tightly coupled to the corresponding data manipulations. Sometimes it is even possible to enforce total order of messages.

The moment the message crosses the service boundary, it enters the no man's land where bad things happen. Messages get reordered, duplicated, or even lost.

Watch this talk to learn about some patterns you can use to get your messages safely to the other side.

About Szymon Pobiega

Szymon Pobiega used to work on various business software for almost a decade. Of all the ideas and patterns he learned along the way, asynchronous messaging had the most profound impact.

Over three years ago Szymon quit consulting and joined Particular Software with the hope to use his field experience to build tools for developing distributed systems. Szymon is focused, in Particular (pun intended), on message routing patterns and handling of failures.



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