1. What’s new in version 4 of GAUDI
LHCb Software Week
5-7 April 2000
P. Mato / CERN
The following are few slides intended to trigger a discussion/brainstorming with the goal of producing an Architecture for the DCS kernel.
Definition on Architecture: “The architecture of a system is the structure of the system”. Two main ingredients: A set of building blocks, and a set of collaborations that specify how those building blocks cooperate to provide various system functions.
An DCS architecture will allow us to provide set of control applications or control systems that fulfill a range of needs within the DCS domain. An architecture encourages reuse.
Analogies in the real world: Gothic architecture, Lego Basic® architecture, Lego Technique® architecture.
“To be successful, an object-oriented project must craft an architecture that is both coherent and resilient and then must propagate and evolve the vision of this architecture to the entire development team”, G. Booch, Object Solutions.

2. What's new in version 4 of GAUDI
Contents
What’s new in GAUDI
Review of Progress
Status of Release
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What's new in version 4 of GAUDI

3. What's new in version 4 of GAUDI
What’s new in GAUDI
A number of undesired “features” has been fixed
Data Access
Data Persistency (Markus’s talk)
Event Model (covered yesterday)
Detector Description (covered yesterday)
Histograms (Pavel’s talk)
Visualization (Guy’s talk)
Dynamic Loading (Markus’s talk)
Framework Services
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What's new in version 4 of GAUDI

4. What's new in version 4 of GAUDI
Data Access
Overcoming deficiencies in EventSelector (SICb specific implementation).
Handling EOF
Handling more than one jobID or file
Bookkeeping database interface (old database)
Improved abstract interface
Pileup support
Interfaced to the Sicb “merge” routine (not yet fully working)
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What's new in version 4 of GAUDI

5. Pileup Architecture SicbEventSelector ApplicationMgr EventDataSvc
IProperty
IEventSelector
“EventSelector”
SicbEventSelector
ApplicationMgr
IDataManagerSvc
“EventDataSvc”
EventDataSvc
“PileupAlg”
SicbPileupAlg
IDataProviderSvc
IDataProviderSvc
IProperty
IEventSelector
“PileupSelector”
SicbEventSelector
“PileupSvc”
SicbPileupSvc
“PileupDataSvc”
EventDataSvc
IDataManagerSvc
The Algorithm and Service can be merged into one Algorithm for the Sibc version
Not needed for the Sicb version
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What's new in version 4 of GAUDI

6. What's new in version 4 of GAUDI
Framework Services
JobOptionsSvc
Support for “#IFDEF” “#ENDIF”
Support for “environment variables”
RandomNumberSvc
First version available. Not yet save/restore available.
ChronoSvc
Utility service for measuring elapsed time and produce statistics at the end of the job.
Gaudi Exceptions
Base class defined.
The Algorithm::execute() inside a try/catch clause
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What's new in version 4 of GAUDI

7. What's new in version 4 of GAUDI
Units
Adopted GEANT4/CLHEP system of units in GAUDI v3
mm, ns, MeV,...
Better conformance to the CLHEP units
Sicb Converters
XML files
Particle properties
Examples
etc.
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What's new in version 4 of GAUDI

8. Re-packaging New package containing a number of basic services
GAUDI Framework
GaudiExam.
(applications)
HbookCnv
(converters)
RootCnv
(converters)
SicbCnv
(converters)
LHCbEvent
(event model)
GaudiSvc
(services)
DetDesc
(detect. model)
Gaudi
(foundations)
Package group
Package dependency
Optional runtime dependency
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What's new in version 4 of GAUDI

9. What will not be on the Release
New ROOT version
Event collections
Monitoring utilities (property browser, data store browser, …)
“Tools” and “Toolbox”
Re-structuring of ApplicationMgr
Deployment of Bug tracking tool
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What's new in version 4 of GAUDI

10. What's new in version 4 of GAUDI
Review of work
7/4/2000
What's new in version 4 of GAUDI

11. Task List (from last November)
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What's new in version 4 of GAUDI

12. Task List (from last November)
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What's new in version 4 of GAUDI

13. What's new in version 4 of GAUDI
Status of release 4
All packages are working in the DEV area
Very minor changes needed
Last commit next Monday
Working on new version of User’s Guide
Public release by the end of next week
7/4/2000
What's new in version 4 of GAUDI