An empirical characterization of event sourced systems and their schema evolution — Lessons from industry

Overeem, Michiel; Spoor, Marten; Jansen, Slinger; Brinkkemper, Sjaak

doi:10.1016/j.jss.2021.110970

Cited by 8 publications

(10 citation statements)

References 31 publications

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“…This in turn could harm the impact that the research has on society. In this dissertation, the research done on event sourcing [186,187] is an example of context aware research. Event schema evolution was a real-world challenge experienced not only by AFAS Software, but through the community as a whole.…”

Section: Partnership Between Academia and Industrymentioning

confidence: 99%

“…Our initial research [186] led to invitations to speak at user groups and conferences (See the listing on page 212 for a complete list). These talks led to valuable interactions that we used in our follow-up research [187].…”

Section: Partnership Between Academia and Industrymentioning

confidence: 99%

“…The chapter was originally published as a journal article [187]. The first author conducted all of the interviews, while the transcription was done by the first and third author.…”

Section: Chapter 3 -An Empirical Characterization Of Event Sourced Sy...mentioning

confidence: 99%

“…This new system is based on an internal developed LCDP, called AFAS Focus, using an ontological enterprise model [228] (the platform was formerly called NEXT). The system is cloud-based and its architecture applies event sourcing and CQRS [187] to satisfy quality characteristics such as availability and responsibility. The research and development of AFAS Focus started ten years ago.…”

Section: Case Studymentioning

confidence: 99%

“…The run-time model of AFAS Focus consists of a small number of component types that exist in an event sourced architecture [187]. To analyse and observe the impact, the run-time model is represented in a message dependency graph [195].…”

Section: Run-time Model Diffmentioning

confidence: 99%

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Evolution of Low-Code Platforms

Overeem¹

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Event sourced systems are increasing in popularity because they are reliable, flexible, and scalable. In this article, we point a microscope at a software architecture pattern that is rapidly gaining popularity in industry, but has not received as much attention from the scientific community. We do so through constructivist grounded theory, which proves a suitable qualitative method for extracting architectural knowledge from practitioners. Based on the discussion of 19 event sourced systems we explore the rationale for and the context of the event sourcing pattern. A description of the pattern itself and its relation to other patterns as discussed with practitioners is given. The description itself is grounded in the experience of 25 engineers, making it a reliable source for both new practitioners and scientists. We identify five challenges that practitioners experience: event system evolution, the steep learning curve, lack of available technology, rebuilding projections, and data privacy. For the first challenge of event system evolution, we uncover five tactics and solutions that support practitioners in their design choices when developing evolving event sourced systems: versioned events, weak schema, upcasting, in-place transformation, and copy-and-transform.

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Section: Partnership Between Academia and Industrymentioning

confidence: 99%

Section: Partnership Between Academia and Industrymentioning

confidence: 99%

“…The chapter was originally published as a journal article [187]. The first author conducted all of the interviews, while the transcription was done by the first and third author.…”

Section: Chapter 3 -An Empirical Characterization Of Event Sourced Sy...mentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

Section: Run-time Model Diffmentioning

confidence: 99%

See 3 more Smart Citations