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Tango V10 Status Report 2

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V10 Refactoring
Status Report 2
16/11/16 Igor Khokhriakov 2
DevVarDoubleArray
● New pattern
– Remove inheritance
– Replace impl subclass with template
● _var → std::shared_ptr
16/11/16 Igor Khokhriakov 3
ReadWriteLock
16/11/16 Igor Khokhriakov 4
Misc
● CORBA::string_dup
● CORBA::Type → DevType
● Spit CxxTests
● Improved README
16/11/16 Igor Khokhriakov 5
Isolating ORB
● ORB_var (used mainly for Notifyd)
● Remove NotifdEvent(Consumer/Supplier)
● TangORBProvider declares interface
TODO:
● Initialize ORB at start (server or client)
16/11/16 Igor Khokhriakov 6
Omnithread → std::thread
● Requires deep analyzes and understanding
● TANGO threads:

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V10 sr2

  • 2. 16/11/16 Igor Khokhriakov 2 DevVarDoubleArray ● New pattern – Remove inheritance – Replace impl subclass with template ● _var → std::shared_ptr
  • 3. 16/11/16 Igor Khokhriakov 3 ReadWriteLock
  • 4. 16/11/16 Igor Khokhriakov 4 Misc ● CORBA::string_dup ● CORBA::Type → DevType ● Spit CxxTests ● Improved README
  • 5. 16/11/16 Igor Khokhriakov 5 Isolating ORB ● ORB_var (used mainly for Notifyd) ● Remove NotifdEvent(Consumer/Supplier) ● TangORBProvider declares interface TODO: ● Initialize ORB at start (server or client)
  • 6. 16/11/16 Igor Khokhriakov 6 Omnithread → std::thread ● Requires deep analyzes and understanding ● TANGO threads:
  • 7. 16/11/16 Igor Khokhriakov 7 Omnithread → std::thread ● Tasks (KillThread, RestartServer etc) → std::async – One shot action ● Threads (PollThread, KeepAliveThread etc) – Start method creates new std::thread and detaches ● PollThread → Tango::polling framework
  • 8. 16/11/16 Igor Khokhriakov 8 Tango::polling
  • 9. 16/11/16 Igor Khokhriakov 9 Code rewritten ● standard naming patterns (for-loop); ● Avoid: – nested ifs, huge switches, incomplete variable names; ● each method does exactly one thing; ● extract general purpose classes; ● execution pattern: create than execute; ● each class in its own header+source (export as few as needed by the user) ● Eliminate dead code – always true/false; fixed value params; etc ● Use integral types do calculate time
  • 10. 16/11/16 Igor Khokhriakov 10 TODO ● Finish refactoring ● Fix tests ● Unit tests (compute_next_sleep etc) ● Merge PollThInfo and PollThread → polling::engine ● Move (refactor?) other polling related files to ::polling
  • 11. 16/11/16 Igor Khokhriakov 11 Some thoughts ● Merge ApiUtil and Util ● Util is basically a DS, i.e. merge Util and server ● DeviceProxy (Database) has a connection (not inherit) ● Replace ifs with polymorphism (Db, FileDb; DeviceServer, PyDeviceServer etc) ● Replace map<device,smth> with corresponding Device field ● Distinguish Heartbeat, StoreSubDevices and Polling threads ● Implement event driven service bus
  • 12. 16/11/16 Igor Khokhriakov 12 Some thoughts: events ● ORB layer generates events for incoming requests (attr read/write, cmd, pipe etc) ● Server generates events: new attribute value, state change etc
  • 13. 16/11/16 Igor Khokhriakov 13 Some thoughts: service ● AccessControl ● Logging ● Blackbox ● Polling (push new values) ● Attribute Read/Writter ● Command executor ● User defined services
  • 14. 16/11/16 Igor Khokhriakov 14 Misc thoughts ● CORBA creates a new request handler thread if previous one is busy, otherwise reuses
  • 15. 16/11/16 Igor Khokhriakov 15 Further TODOs ● Put efforts into GitHub promotion: – ESRF deployment pipe line – Move other projects (mavenize Java !!!) – Source distribution – Test on Windows (MSVC #) ● Setup REST server @ESRF ● CLion training course ● ???
  • 16. 11/16/16 Igor Khokhriakov 16 SAVE THE DATE: Friday November, 4th @19:00 Pub `Au Bureau` Meal is for free ;)

Editor's Notes

  1. Split polling tread into polling, heartbeat and subdevices Execute poll commands synchroniously in the same thread Use priority queue to store workitems EvenytSystem Code rewritten: statndard patterns (for-loop); avoid nested ifs, huge switches, incomplete variable names, each method does exactly one thing; extract general purpose classes; execution pattern: create than execute; each class in its own header+source
  2. Thank you for Clion license – HZG expires. So its very cool one more year for tango-controls