Software Tools at the Rome CMS/ECAL Regional Center

Giovanni OrgantiniCMS/Roma

Software Tools at the Rome CMS/ECAL Regional Center

Giovanni Organtini

INFN-Roma


Introduction


The ACCOR Machine

Co60

PM

LED


CRISTAL

• Workflow Management System– Configurable– Interface with:

Humans Instruments Software

• Data Base System


ORB

CRISTAL

Workflow DefinitionDB

Collected DataDB

PARTBROWSER

InstrumentAgent


CRISTAL Browser

Registered Parts


Activity

Workflow


Manual Activity


Instrument Activity

PM IA Instrument

CONNECT

ACKN

GETJOBS

JOBS

STARTJOB

RESULT

CORBAChannel

TCP/IPChannel


UML Model for Parts and Instruments

PartOnInstrument Instrument

XMLParser

10..n

A Part being measuredby an instrument

An automatic “CRISTAL”instrument

Encoding/Decodingof XML-like structures


OO Design strategy

• Follows known patterns whenever possible

• Every instrument in the Center uses the same pattern: reusability

• No explicit pointer in the software: use STL instead

• Provide shortcuts for few methods that MUST be fast


OO Experience

• OO technology useful even for medium scale projects

• Formal tools and methods makes development faster

• No significant differences found in performances with respect to FORTRAN programs


Operating Systems integration


Linux Choice


VNC

Server Windows/LinuxVNC = Service

Client Linux/WindowsVNC = Application

•Free-ware•Easy to install•Very useful

•Slow•Single user

Network


Xterm

Xclock

Pager

Linux Desktop

Windows Menu

Windows IconsVNC


Windows vs Linux

Good Bad

System Management Windows Linux

Applications availability LinuxWindows

Control WindowsLinux

Access WindowsLinux

System Integration WindowsLinux


Web Tools

• ACCOR can be operated even manually– It shall be operated by non-experts– It shall be operated remotely

• ACCOR must be monitored even remotely

• Data must be available as soon as possible for fast analysis


Documentation

Each physical connection (cable) is mapped into an hyperlink


Command Definition for ACCOR

Commands are defined using FORMS


Command Definition for ACCOR

CGI-PerlScript

<CO>Transmission <AR>Start<VA>15</VA></AR> <AR>Stop<VA>230</VA></AR> <AR>Step<VA>15</VA></AR></CO>


Offline MonitoringClicking on this link startsa Perl script that searches forcrystals already measuredand builds the list on the right

This list is automaticallygenerated (no maintenance!)

Clicking on crystal namea second Perl script is calledwho generates a plot on the

fly


The Perl script uses externalgraphics packages to buildplots (gnuplot in this case)

Offline Monitoring


System Monitoring


Functional Decomposition

LY DAQ TT/LT DAQ 3D DAQ

MotorDaemon

InstrumentAgent ACCOR DAQ


Functional Decomposition

• Programs do not provide graphic interface

• Programs communicates by means of pipes or network messages

• Programs do not produce graphical output

• Suitable graphic browsers provide the interface (web browser or graphics manipulation programs)


Commercial Products: PROs

Reduced development time Good quality documentation

Persistency for free Good Tools Good DB organization Multi-platform


Commercial Products: CONs

They promise, but… Inadequate support Incompatibilities around the corner We are not the market!

DRO/FTO unreliable Versioning unreliable Schema evolution unreliable Slow (?)

Incompatibilities with other products Non CORBA-compliant


Commercial Products: Conclusions

There are no Universal Tools!


Commercial Products: Conclusions (II)

There are not Tools for problems thatdo not exist (yes)


Conclusions

• Object Oriented Programming

• Open Source• Scripting Languages

• Commercial products• Programs with graphical

interface

Natural LanguageUniform interfaceImproved maintenancePerformances Ok

Solve bugs rapidlyNo (or reduced) incompatibilitiesExtremely flexible

Works in any environmentNot enough supportincompatibilities possibleLimited accessIntegration problems

Software Tools at the Rome CMS/ECAL Regional Center

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