Common mistake in arch: Using functionality to id services ("Buying Stocks", "Selling Stocks", ...). Functional decomposition maximizes impact of change, is coupled to it. Better encapsulate change to insulate. Do not resonate with change. |
The conclusion is that you should never design against the requirements (or the features, or the use cases, or the user stories). What you must do instead is identify the smallest set of building blocks, call them microservices if you like, that you can put together to satisfy ANY requirement: present and future, known and unknown. There is a strong process angle of how you go about doing just that.
Identify areas of volatilities, and those you encapsulate in (micro)services. Then you implement the required behavior as the interaction between those services. A new requirement would simply mean a different services interaction, not a different decomposition, so now when the requirements change, your design does not.
https://www.infoq.com/news/2016/07/lowy-every-class-service?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=global
A design persona has nine parts; Products are people, too. | 10 Steps to Personas: https://i.pinimg.com/originals/18/ef/dc/18efdc3bc2bd4a563d8ddbe6548194dc.jpg
Beispiel: http://www.youtube.com/watch?v=3no7CXVl24A ---
Präsentation auf einem virtuellen, unendlich großen Blatt Papier, auf dem man sich durch Maussteuerung bewegen sowie hinein- und heraus zoomen kann
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"A sandbox for collecting search examples, patterns, and anti-patterns. [...] Over time, I hope to add patterns that illustrate user behavior and the information architecture of search."
http://www.purl.org/stefan_ram/pub/doc_kay_oop_en http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/begriff_objektorientierte_programmierung_de Alan Kay coined the phrase Object-Oriented Programming, but this is not his fault. He has repeatedly said that to him, OOP is about encapsulation and message passing, not inheritance and ontologies of types. But like so many other Cargo Cults in Computer Programming culture, OOP and inheritance are enchained like ancient mariner and albatross
A. Hoffmann, H. Hoffmann, и J. Leimeister. Workshop über Selbstorganisierende, adaptive, kontextsensitive verteilte Systeme (SAKS 2010). Electronic Communications of the EASST, 27, стр. 9. Berlin, Germany, European Association of Software Science and Technology (EASST), (2010)188 (36-10).
A. Hoffmann, H. Hoffmann, и J. Leimeister. Workshop über Selbstorganisierende, adaptive, kontextsensitive verteilte Systeme (SAKS 2010). Electronic Communications of the EASST, 27, стр. 9. Berlin, Germany, European Association of Software Science and Technology (EASST), (2010)188 (36-10).
K. Meyer. Technologie und Dienstleistung: Innovationen in Forschung, Wissenschaft und Unternehmen. Beiträge der 7. Dienstleistungstagung des BMBF, стр. 47-55. Campus-Verlag, (2008)