Page History

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• 3 Java Message Service (JMS) buses that support transport of
  • Commands
  • Status/Alarm messages
  • Logging
    • The system is not locked to a specific JMS implementation but CCS currently favors glassfish
• An OCS Bridge which
  • Accepts hight level commands from the telescope and generates sequences of low level CCS commands
  • Sends aggregate monitoring/status information back to telescope
• History Database
  • Uses hibernate to support any backend database
• Subsystems
  • Control/Monitor specific hardware module via one of
    • Java->JNI->C-cpdecode
    • Java->Serial ports
      • CCS group favours the use of Can bus/Can Open (also used by augerAuger )
  • Communicates with other subsystems via JMS buses
  • Subsystems can optionally consist of reusable modules
    • Modules are wired together using an XML configuration file
      • Currently implemented using Spring by generating spring XML from user-written XML
• Aspect oriented system (currently using AspectJ) can be used to enforce security
  • (e.g. to prevent certain methods from being called unless subsystem is in a particular state)

A guiding principle of the design/architecture is to define CCS specific interfaces which hide implementation details to prevent lock-in to a particular implementation. The CCS software is initially targeted at a PC 104 hardware platform running Linux and Java.

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• Develop specification of Rest Interface (***)
  • Implement rest interface -> Link to database via Hibernate (**)

• Develop GUI (Web based and/or JavaWebStart) (**)
  • Trending Analysis system
    • Status Display
    • Generic Overview
    • Console
    • Subsystem specific displays (e.g. Shutter Control,Carousel Control)
  • Setup Glassfish to run JMS and Web Services (**)
    • "out of the box" setup

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We worked on the following specific items during the visit:

• Obtained Subversion, Trac, DocuShare and LSST hypernews access for Max and Tony
• Set up glassfish 3 as JMS server.
• Set up example maven pom for evaluation of maven as potential build/module system. (Paris group also intends to look at Ivy)
• Set up Hudson for evaluation as a continuous integration server
• Began definition of RESTful interfaces for trending data.
• Started to work Worked on a simple GUI for the FCS.Began definition of RESTful interfaces for trending data.

Image Added

Action Items

We identified the following short-term followup action items:

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