Service (systems architecture) explained

Service (systems architecture) should not be confused with Server (computing).

In the contexts of software architecture, service-orientation and service-oriented architecture, the term service refers to a software functionality, or a set of software functionalities (such as the retrieval of specified information or the execution of a set of operations) with a purpose that different clients can reuse for different purposes, together with the policies that should control its usage (based on the identity of the client requesting the service, for example).

OASIS defines a service as "a mechanism to enable access to one or more capabilities, where the access is provided using a prescribed interface and is exercised consistent with constraints and policies as specified by the service description".^[1]

Service engineering

A business analyst, domain expert, and/or enterprise architecture team will develop the organization's service model first by defining the top level business functions. Once the business functions are defined, they are further partitioned and refined into services that represent the processes and activities needed to manage the assets of the organization in their various states. One example is the separation of the business function "Manage Orders" into services such as "Create Order", "Fulfill Order", "Ship Order", "Invoice Order" and "Cancel/Update Order". These business functions have to have a granularity that is adequate in the given project and domain context.

Many analysis and design methods can be used for service engineering, both general purpose ones such as OpenUP and Domain-Driven Design as well as those discussed under Service-oriented modeling.

Bibliography

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• Book: Yangui, Sami . Service-Oriented Computing - ICSOC 2019 Workshops: WESOACS, ASOCA, ISYCC, TBCE, and STRAPS, Toulouse, France, October 28-31, 2019, Revised Selected Papers . 2020 . Springer International Publishing AG . Athman Bouguettaya, Xiao Xue, Noura Faci, Walid Gaaloul, Qi Yu, Zhangbing Zhou, Nathalie Hernandez, Elisa Y. Nakagawa . 978-3-030-45988-8 . Lecture Notes in Computer Science Ser . Cham.
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• Book: Hacid, Hakim . Service-Oriented Computing - ICSOC 2020 Workshops: AIOps, CFTIC, STRAPS, AI-PA, AI-IOTS, and Satellite Events, Dubai, United Arab Emirates, December 14-17, 2020, Proceedings . 2021 . Springer International Publishing AG . Fatma Outay, Hye-Young Paik, Amira Alloum, Marinella Petrocchi, Mohamed Reda Bouadjenek, Amin Beheshti, Xumin Liu, Abderrahmane Maaradji . 978-3-030-76351-0 . Lecture Notes in Computer Science Ser . Cham.
• Book: Software, System, and Service Engineering: S3E 2023 Topical Area, 24th Conference on Practical Aspects of and Solutions for Software Engineering, KKIO 2023, and 8th Workshop on Advances in Programming Languages, WAPL 2023, Held as Part of FedCSIS 2023, Warsaw, Poland, 17–20 September 2023, Revised Selected Papers . 2024 . Springer Nature Switzerland . 978-3-031-51074-8 . Jarzębowicz . Aleksander . 1st ed. 2024 . Lecture Notes in Business Information Processing . Cham . Luković . Ivan . Przybyłek . Adam . Staron . Miroslaw . Ahmad . Muhammad Ovais . Ochodek . Mirosław.

Notes and References

1. http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=soa-rm OASIS Reference Model for Service Oriented Architecture 1.0