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Experience with XAL @ LCLS

EPICS Meeting @ Argonne. Experience with XAL @ LCLS. Sergei Chevtsov, 06-16-2006. XAL Out-of-the-box. Website, good instructions JDK 1.5 Download XAL binaries, untar , etc. Configure components (e.g. JCA) Install portable CA server

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Experience with XAL @ LCLS

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  1. EPICS Meeting @ Argonne Experience with XAL@ LCLS Sergei Chevtsov, 06-16-2006

  2. XAL Out-of-the-box Website, good instructions JDK 1.5 Download XAL binaries, untar, etc. Configure components (e.g. JCA) Install portable CA server => RunXAL applications that use SNS machine and ‘fake’ channels (demo mode) Sergei Chevtsov, 06-16-2006

  3. Lab-dependent Tasks • Loading accelerator geometry • Devices and their ‘static’ attributes • Running online model Sergei Chevtsov, 06-16-2006

  4. XAL & Accelerator Geometry (abstract) RDB XML Java App App Model Sergei Chevtsov, 06-16-2006

  5. XAL & Accelerator Geometry (formats) SNS Schema XDXF eXtended Description eXchange Format Java App App Model Sergei Chevtsov, 06-16-2006

  6. Accelerator Geometry (formats) SNS Schema XDXF Standard Machine Format SMF App App Model Sergei Chevtsov, 06-16-2006

  7. LCLS vs. SNS • Should we reuse SNS schema? • Committee • PEP II experience • Administration • Computer science => loose coupling • Answer • No, we are going to use LCLS resources. Sergei Chevtsov, 06-16-2006

  8. Loading data from LCLS Schema Queries on SNS schema hard-coded into the XDXF instance creator => Rewrite, use standard libraries, make generic and configurable (statistics: 2000 lines of code; creates 30000 lines of XML) Problems with XDXF definition => DTD from 2002, not fully documented Sergei Chevtsov, 06-16-2006

  9. Understanding XDXF • “Extract” XDXF from SNS’ accelerator file • XML instance => XML schema • Generic tools available • SMF classes for tweaking • JavaDoc, code • Paul Chu’s visit Sergei Chevtsov, 06-16-2006

  10. Generic Accelerator Schema => XDXF • RDB schema => XML schema, lots of tools • Our solution: externalized queries • Based on internationalization • Simple, flexible • Implementation not finished • But, hand-edited SNS accelerator file Sergei Chevtsov, 06-16-2006

  11. Online Model • SMF classes • Device types (BPM, Magnet, etc.) • Redefine, extend, create new • Model new device types • “Straightforward” • Paul Chu’s visit Sergei Chevtsov, 06-16-2006

  12. Summary • Excellent support • Email, phone, conference calls, visits • => thanks again, guys! • Great resources at the highest level • Papers, diagrams, installation instructions • Great resources at the lowest level • JavaDoc, clean code, snippets • Extending resources in the ‘middle’ • Documentation of XDXF and other components • Class/ sequence diagrams for SMF Sergei Chevtsov, 06-16-2006

  13. The End Thank you  Sergei Chevtsov, 06-16-2006

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