| Article | |
| Title | Developing Modern High-Level Controls APIs |
| Author(s) | Urbaniec, Bartlomiej (CERN) ; Burdzanowski, Lukasz (CERN) ; Gennaro, Stefano (CERN) |
| Publication | 2023 |
| Number of pages | 5 |
| In: | JACoW ICALEPCS 2023 (2023) TH2AO04 |
| In: | 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.TH2AO04 |
| DOI | 10.18429/JACoW-ICALEPCS2023-TH2AO04 |
| Subject category | Computing and Computers |
| Abstract | The CERN Accelerator Controls are comprised of various high-level services that work together to provide a highly available, robust, and versatile means of controlling the Accelerator Complex. Each service includes an API (Application Programming Interface) which is used both for service-to-service interactions, as well as by end-user applications. These APIs need to support interactions from heterogeneous clients using a variety of programming languages including Java, Python, C++, or direct HTTP/REST calls. This presents several technical challenges, including aspects such as reliability, availability and scalability. API usability is another important factor with accents on ease of access and minimizing the exposure to Controls domain complexity. At the same time, there is the requirement to efficiently and safely cater for the inevitable need to evolve the APIs over time. This paper describes concrete technical and design solutions addressing these challenges, based on experience gathered over numerous years. To further support this, the paper presents examples of real-life telemetry data focused on latency and throughput, along with the corresponding analysis. The paper also describes on-going and future API development. |
| Copyright/License | CC-BY-4.0 |
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